Showing posts with label weatherwatcher. Show all posts
Showing posts with label weatherwatcher. Show all posts

WeatherWatcher: Wild Weekend Ahead, even snow is forecast

Saturday, April 9, 2022

 

Convergence zone snow event in Shoreline.
Photo taken April 18, 2008 at 7:09 pm PDT, by Carl Dinse.

Snow is in the weekend forecast; how can that be in April? It's not the first time for Shoreline, even during the recent decades of the global warming era. It is however very unusual; the above photo is from the last recorded April snowfall in Shoreline. You'll note that it was daylight at 7:09pm, with snow covering the road.

The 2008 snow event was the result of very cold air above us and a strong convergence zone event stretching west to east, with Everett at the northern end of the zone and Shoreline at the southern end of the zone. We got about 3-8 inches accumulated on the ground in that event, but it was very short lived, lasting less than 12 hours.

Back to the present, snow is forecast this weekend during the overnight hours down to 200 feet in elevation. This covers most parts of Shoreline and northern parts of Lake Forest Park away from the lake. No accumulation is expected, and any that does stick will quickly melt away as daylight breaks. The best chance of any snow will be the early morning hours Sunday morning and Monday morning.

Another type of weather also has a slight chance of happening Friday night through Saturday night. There is enough unstable air in the mix for convective showers and with that, hail and thunderstorms are possible. The chances of a thunderstorm or hailstorm are as low as accumulating snow.

Breezy north and west winds are expected through the weekend, Monday morning could be the worst of it as a deep low-pressure system moves onshore near the Washington and Oregon border. The strongest winds will be south and west of this low-pressure system; however our region will be mostly spared of any damaging winds.

After we get past Monday morning we will resume our regularly scheduled April weather, seasonable temperatures with highs in the mid-upper 50's and lows in the 40's. Chances of rain are forecast through all next week. It'll be a little while before we enjoy another dry day in the 70's.

Speaking of dry days in the 70's, Thursday was our warmest day of the year so far, clocking in at a high temperature of 79.0°F in the Echo Lake neighborhood and 73°F in the Richmond Beach neighborhood. Marine air greatly influenced the cooler temperatures in Richmond Beach and Echo Lake was getting the east wind warming effects.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Wind Advisory in effect Monday midnight to 8pm PDT

Sunday, April 3, 2022

 
Maximum gusts forecast from the National Weather Service in Seattle.
The National Weather Service in Seattle has issued a high wind advisory for the greater Seattle area, including the cities of Shoreline and Lake Forest Park and to our neighbors north through Everett. 

Winds in the area are expected to increase overnight to 25-35 mph with gusts peaking at 50 mph, especially during Monday afternoon. The wind advisory is in effect from Monday morning at midnight until Monday evening at 8pm.

Significant rain is on the way as well for this time of year. The steady rain is expected to break up into showers Monday afternoon, with a slight chance of a thunder shower in the mix. We are looking at about a half inch to three quarters of an inch of rain between now and Monday evening.

Forecast: For the rest of the week, things calm down a bit, but still cooler than normal. Tuesday looks mostly cloudy with a chance of showers. Wednesday and Thursday seem to be the driest with even some sunny skies. Highs in the mid-upper 50's on Wednesday, reaching the mid to upper 60's on Thursday. Friday through next weekend the clouds return, and the threat of rain returns with it.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Atmospheric River Monday

Sunday, February 27, 2022

UW WRF-GSF Forecast model 4km Rainfall total ending Tuesday at 4pm PST.

Heavy rain expected over the next 24 hours, with continued showers and rain at times for most of the week. An atmospheric river has taken aim at the Pacific Northwest Sunday and Monday. Several inches of rain are expected to fall in the region with Shoreline sort of skirting the edge of the Olympic Mountain rain shadow. 

For Shoreline and Lake Forest Park, we're expecting 1-3 inches of rain by the end of Monday night. A little less rain closer to the Puget Sound in areas such as Richmond Beach, heaver rain towards Lake Forest Park. 

To give you a general idea of the west to east spread of rainfall, Sunday night the North Ridge (Echo Lake) station near I-5 and Highway 104 is at 0.88 inches of rain, and Richmond Beach station near Kruckeberg Botanic Garden is at 0.47 inches of rain. The above forecast image also shows a clear northeast line of where the heavier rain ends from south to north, and from west to east.

Forecast: A break from steady rain on Tuesday with just a threat of showers. Another round of rain Tuesday night and Wednesday. Showers or a chance of rain Thursday through Friday. The weekend looks dry right now, suggesting we might even see some sunshine on Sunday.

Temperatures will be mild to start the week. High temperatures in the low to mid 50's on Monday and Tuesday with a low near 50°F Tuesday morning, typical of an atmospheric river. We cool a little into the 40's Tuesday night but warm back up to the 50's Wednesday. Thursday and Friday we cool back into the 40's, and get even chillier into the weekend with lows dipping back down into the mid 30's.


For current weather conditions visit www.shorelineweather.com


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WeatherWatcher: Light Snow possible, cold snap this week.

Tuesday, February 22, 2022

Shoreline 11pm February 21, 2022 photo by Diane Hettrick

Flurries are indicating a cold snap is moving in place. We have arctic air moving into the region to take hold for most of the week, but it's not expected to bring much, if any snow with it. Temperatures this week are expected to dip into the low to mid 20's with highs in the 30's. Tuesday night is expected to be our coldest night. We are also expecting sunshine and clear skies, with not much moisture around to give us too much of a snow threat.

There is another slight chance of snow Wednesday night into Thursday morning, but again, slight chance and very light. We're not expecting the story here to be a snow event, just a cold event. Friday is a transition day, with temperatures rising a little bit relative to the earlier part of the week. Saturday and Sunday we go back to high temperatures near 50°F and a renewed chance of rain.

Bottom line: Main story this week will be the cold air, but it's not as cold as it was during the last week of December. We remain, for the most part, dry all week until we warm up a little and return to chances of rain next weekend.

For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Air Stagnation Advisory, Dense Fog Advisory

Sunday, January 23, 2022

Fog looking west on N 190th St across Meridian Ave N, January 23, 2022.
Photo by Carl Dinse
The National Weather Service in Seattle has issued a Dense Fog Advisory and an Air Stagnation Advisory. The Dense Fog Advisory is in effect until Noon PST Monday, and the Air Stagnation Advisory is in effect until Noon PST Wednesday.

A strong high pressure system over the Northwest has created a very strong temperature inversion starting at about 800 feet in elevation. Temperatures below the 800 foot level are in the mid-upper 30's with temperatures above that level in the mid 50's.

Visibility in the fog could be a quarter mile or less at times. It is strongly recommended to drive with your headlights on in the fog, so that you are visible to other drivers. Drive with caution especially near intersections.

Air Stagnation allows for pollution to build up, causing poor air quality. We are being asked to delay outdoor burning, and to limit any residential wood burning devices, if possible, until conditions improve. 

Currently there are no burn bans and air quality remains good in King County. You can check current conditions and info on any air quality burn bans at the Puget Sound Clean Air Agency website.

Forecast: No sign of any rain for the entire work week. Our next chance appears to be Saturday. In the meantime, expect foggy days, although some days the fog might burn off in the afternoons to sunny skies with temperatures peaking in the mid 40's and overnight lows in the 30's. Thursday and Friday have the biggest chance of warming up enough to clear the fog.

Long Range: Long range models have been hinting at an active and cooler weather pattern near the beginning of February. There are also hints that we could have another brush of lowland snow after we start the month. Keep the snow gear nearby just in case.


For current weather conditions visit https://www.shorelineweather.com



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WeatherWatcher: Rain turns to wet snow

Monday, January 3, 2022

The driveway next to the car was clear earlier this evening on this Shoreline street.
Photo by JM
Heavy rain Sunday evening from a strong cold front turned to wet snow or rain and snow mixed in the area. Temperatures were more marginal than originally expected and except for Richmond Beach, we remained in the 30's. As of this writing Echo Lake station is right at 32.0°F, Richmond Beach is 33.8°F.  Proximity to Puget Sound and elevation matters in this event.

Our neighbors to the north in Snohomish County -- Mountlake Terrace, Edmonds, Lynnwood, and Everett -- are under a winter weather advisory in effect until 6am. Freeways are covered in snow in Snohomish County and there are some reports of accumulating wet snow of about an inch in Shoreline now.

Another trace to 2 inches of slushy wet snow is possible by 6am Monday morning. It won't last all day, as temperatures are expected to once again reach the upper 30's or low 40's. However, we have more threats of snow potential Monday night, Tuesday night, and all day Wednesday especially if you're above 400 feet in elevation.

A lot of uncertainty in the forecast still exists so it's too early for me to tell what accumulations, if any to expect Wednesday. In general, we are locked in a pretty healthy La Niña atmospheric pattern so I expect that the chance of lowland snow for Shoreline and Lake Forest Park areas to be more significant the next few weeks than normal.

Bottom line: Be prepared for the possibility of continued winter weather, and brief snow events even if they are not in the forecast. Long range models point to a much cooler and wetter period to continue through the month and in our region, it's always right on the margin if it'll be rain or accumulating snow. There are no deep freezes in the near forecast at this time, but I can't rule out another deep freeze or two before winter is over.


For current weather conditions visit www.shorelineweather.com


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WeatherWatcher: Winter Weather Advisory in effect for Thursday

Wednesday, December 29, 2021

 

January 18, 2012 snow in Shoreline
Photo by Carl Dinse

The National Weather Service in Seattle has issued a winter weather advisory in effect Thursday until 7pm. Snow is expected through Thursday tapering off in the afternoon hours. Total new accumulations expected between 2 - 5 inches.

The forecast has little signs of any warmup for the north end, which includes Shoreline and Lake Forest Park. Snow is expected all day Thursday ending in the evening hours. Friday, we get a break with sunny skies and more cold temperatures. We are looking at lows in the lower to mid 20's and highs right around freezing, depending on your elevation. 

A chance of snow brings in the New Year shortly after midnight with gradual warming during New Year's Day. There is a chance of snow in the morning with the possibility of a chance of rain or snow in the afternoon. Snow levels rise to around 200 feet, so most of the area will still be above the snow level.

Saturday evening through Tuesday we warm up, just a little. High temperatures may make it into the 40's with a chance of rain. Sunday night looks to be our next steady rain event. Longer range shows that by Wednesday next week we could be cooling down again with the threat of at least seeing some snow mix in with rain.

Forecasts continue to have high uncertainty about the warmup in the weekend, and what to expect next week. We'll do our best to keep you up to date with the latest when things become more certain.

Monday December 27, 2021 was officially the coldest day since December 29, 1990. The high temperature on Monday December 27th was 23°F at Sea-Tac. The high on December 29, 1990, only reached 22°F at Sea-Tac. The low this past Monday morning was 17°F at Sea-Tac.

In Shoreline, Monday's high temperature reached 21.6°F, with a low of 14°F. We've recorded a total snow accumulation of 10 inches, but never had 10 inches total on the ground, as some has compressed and evaporated inbetween the smaller snow dumps. There was a total 6 inches on the ground Saturday morning, another 3 inches new snow reported Sunday, and 1 inch new reported Monday at the Richmond Beach station.


For current weather conditions visit www.shorelineweather.com


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WeatherWatcher: Dreaming of a White Christmas, arctic air takes over next week

Friday, December 24, 2021

 

Ice encased Japanese Maple February 2021
Photo by Carl Dinse

Many are watching the forecast and hoping for a White Christmas this year. As defined by the National Weather Service, a White Christmas is qualified by having at least 1 inch of snow on the ground by 7am Christmas morning. 

Our chances are significant this year compared to most years. 2017, 2008, and 1990 are the last three White Christmases the Shoreline area has had. 1996 was a close miss, with heavy snow arriving December 26th.

Christmas Eve we are looking at rain or snow showers, or a mix of both. Accumulations are not expected, but a slushy trace is possible in places. Temperatures are gradually cooling down, but the really cold air comes in Christmas night.

Snow timing is difficult. Models are now showing most of the accumulating snow to be late afternoon to evening Christmas day, leaving things bare and wet in the morning hours. If the early snowfall sticks, we may luck out by 7am, but it's going to be close.

Now is a good time to cover outdoor pipes or hose bibs and disconnect any garden hoses. 

Even if you have frost proof faucets you should get them covered as we are expecting what may be the coldest air we've had in decades. Temperatures could dip into the single digits overnight for the first few days next week. Some models even call for a low of -1°F, yes, that is below zero. 

Snow accumulations. There will be anywhere between 1-4 inches by Saturday night. Another 2-3 inches could accumulate into Sunday but the consensus is around 2-5 inches by the end of the weekend. Another batch of snow is looking likely towards next Wednesday or Thursday but we are looking too far out for any details yet on that.

We are locked into a solid La Niña pattern right now. Long range models are showing a cold trend for us well into the first and possibly second week of January. No typically mild Seattle weather for us for a while.


For current weather conditions visit www.shorelineweather.com


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WeatherWatcher: Wind Advisory issued, spotty snow in the forecast

Thursday, December 9, 2021

 

Wind storm aftermath in Shoreline 2015.
Photo by Carl Dinse

The National Weather Service in Seattle has issued a Wind Advisory for the greater Seattle area, including the cities of Shoreline and Lake Forest Park. The wind advisory is in effect from Friday 7pm until Saturday 10am PST. Winds are expected to gust as high as 50-55mph in some local areas.

From the National Weather Service:
  • What: South winds 25 to 35 mph with gusts up to 55 mph expected.
  • Where: Southwest Interior, Everett and Vicinity, Tacoma Area, Hood Canal Area, Lower Chehalis Valley area, East Puget Sound Lowlands, Bellevue and Vicinity, Seattle and Vicinity, and Bremerton and Vicinity.
  • When: From 7 PM Friday to 10 AM PST Saturday.
  • Impacts: Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.
A lot of rain is expected with Friday nights storm, we're looking at a half inch to one inch of rain by the end of the day Saturday. Temperatures are remaining cool, with lows dipping into the upper 30's and highs in the mid 40's.

Forecasts have been inconsistent but Sunday morning and off and on through next week we will be flirting with arctic air masses passing by off the west coast. There is also a lot of precipitation expected through the next 5 days, at times mixing with snow, or becoming snow during the overnight hours. Snow levels currently are forecast to be as low as 400 feet, typically in the past that usually means most of Shoreline and parts of Lake Forest Park will at least see snowflakes in the air.

Stay tuned, I will bring more updates on the snow threats next week as more details become clear.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Wind Advisory in effect until 4pm PST Monday

Monday, November 15, 2021

 

Signs of a windy day on a Shoreline street.
Photo by Carl Dinse.

The National Weather Service in Seattle has issued a wind advisory for the greater Seattle area which includes Shoreline and Lake Forest Park. The wind advisory is in effect until 4pm PST Monday afternoon. Winds Monday afternoon are expected to be out of the south, 15 to 30 mph, gusting to 40 mph.

Our neighbors in Snohomish County are under a high wind warning, with wind gusts to 45mph possible. Paine Field in Everett has recorded several wind gusts over the weekend of over 54mph. We had wind gusts to 38mph in Richmond beach shortly after 5am Sunday morning, and it has been windy all day.

Forecast: Breezy conditions are expected overnight into Monday morning. Winds pick up Monday afternoon with gusts to 40 mph. We are expecting about an inch of rain Monday afternoon as well. Winds calm down a little Monday night but still gusting to 35 mph.

Rain lets up Tuesday a little bit with only the chance of rain or showers. Wednesday is our driest day of the week with partly sunny skies, but chilly, highs staying in the mid 40's. Rain returns Thursday and is expected through the following weekend. Temperatures are remaining in the 40's through the weekend as well.


For current weather conditions visit www.shorelineweather.com




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WeatherWatcher: Windy period ahead

Saturday, October 23, 2021

 

Breezy Puget Sound. Photo by Carl Dinse.


Thursday's offshore "bomb cyclone" didn't develop as strong as forecasted. It did, however, stay offshore and weakened as it moved north towards Alaska. We had some breezy conditions in the area but nothing we haven't already seen this fall. Winds gusted at the Richmond Beach station at 23 mph that day.

Another "bomb cyclone" is developing well offshore Saturday night and is expected to start impacting the region on Sunday, although this one too will remain well offshore until Tuesday night. 

With the offshore track of this storm, it's not expected to produce excessively strong winds for Shoreline and Lake Forest Park. The storm is also expected to weaken a lot as it gets closer to Vancouver Island.

Our neighbors to the north in Woodway, Edmonds, Mountlake Terrace, Lynnwood, and Everett have a high wind advisory in effect Sunday. Winds could gust up to 45 to 50mph there. 

Winds in Shoreline and Lake Forest Park stay below advisory criteria, in the 25-35mph range. Wind is expected to continue Sunday night well into Monday night, finally calming down to breezy conditions Tuesday.

Rain: Yes, there will be rain, in fact there is rain at times in the forecast starting Sunday and extending to all next week. We are expecting around 3/4 of an inch to about one inch of rain by Monday evening. Heaviest rain is expected on Monday afternoon and evening.



For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Storm train approaches

Tuesday, October 19, 2021

 

Stormy day on Puget Sound
Photo by Carl Dinse
October is running about 2 and a half degrees colder than average. Total rainfall this month so far is 1.47 inches, but that's about to quickly increase.

October 2021 compared to average

Forecast: One more day of this break in the weather on Tuesday, with mostly sunny skies and high temperatures in the upper 50's to possibly the mid 60's. Tuesday night the first of many storm fronts moving in, with rain after midnight and winds increasing to 25mph. Lows will be near 50°F.

Wednesday is expected to be a breezy day, with south winds of 15-25mph and gusts as high as 40mph. There will be rain at times as well, with high temperatures in the upper 50's or low 60's. 

Wednesday night through Thursday afternoon is a break between storms, with a chance of rain at times. Lows in the mid 40's to lower 50's and highs in the lower 60's.

Our next storm moves in Thursday night with rain at times, lows in the lower 50's. 

Friday through the weekend we are expecting rain at times and rain likely. Lows near 50°F and high temperatures in the mid to upper 50's.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: September, La Niña, Weekly forecast

Friday, October 8, 2021

 
Photo by Carl Dinse

Fall arrived in what seems like overnight with a lot of rain, colder than normal temperatures, and everything changing color. 

September clocked in at 2°F below normal and with 4.27 inches of rain, well above the normal of 2.2 inches of rain. That rainfall amount of 4 inches is more usual for October.

Daily high and low temperatures compared to average in October for Shoreline.

The colder and wetter conditions we've experienced seem to be making up for our very dry and warm summer. 

There is a reason behind the sudden cooler and wetter pattern. La Niña is returning and is expected to persist through most of fall and all of winter. Our weather these past couple weeks is a textbook La Niña weather pattern for the Pacific Northwest.

Seasonal Outlook: For Shoreline and Lake Forest Park, our fall and winter season will be colder and wetter than normal with an earlier start to the cold and wet than last year. Rainfall will likely be above average through most of the fall and winter. Windstorms will probably be close to average, with a few events breaking 50mph and maybe one event over the 60mph mark. 

I think there is a slightly higher chance of a late November to early December snow event due to the early onset of La Niña-like weather patterns. Late December and January are open windows for a larger snow event like the one we had last February, where we got 10+ inches of snow accumulation. 

It's important to note that these weather events are just a little bit more likely. There is also a chance we will see little or no snow, or little or no windstorms, or something much more severe. La Niña years, especially back-to-back ones, generally favor more rain, colder, and potentially more snow.

Weekly Forecast: This weekend and next week temperatures are expected to remain colder than normal. We are even looking at lows dipping into the 30's early next week. Highs are expected to be in the upper 50's and low 60's for both Saturday and Sunday. 

Saturday is a transition day, with mostly cloudy skies and some fog possible in the morning hours. Rain moves in late in the afternoon with steady rain Saturday evening turning over to showers going into Sunday morning. Sunday afternoon and evening look to be cloudy, and showers likely with a slight chance of a thunderstorm.

Monday and Tuesday look sunny, with highs in the low to mid 50's and lows near 40 Monday night into Tuesday morning, possibly 37-39°F away from the water. Tuesday through Friday chances of rain return for each day, with temperatures ranging in the low to mid 40's for lows, and low to mid 50's for highs.


For current weather conditions visit www.shorelineweather.com


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WeatherWatcher: Stormy week ending with a sunny weekend

Thursday, September 30, 2021

 

Rainy day at Richmond Beach Saltwater Park.
Photo by Carl Dinse.


The past two weeks have been making up for our extra dry summer. We've accumulated well over 3 and a half inches of rain over that short period. Our average monthly rainfall for September in Shoreline is 2.2 inches, so we are well above that this year. 

Rainfall at the Northridge/Echo Lake Station for September 2021

Temperatures are trending slightly below average for most of the month, but I'd say that's normal and well within our natural variation. September is a wild card month for weather. Some years it's nice and sunny the entire month with other years being gloomy, grey, and misty for most of the month.

Daily high and low temperature at the Northridge/Echo Lake Station for September 2021.

Forecast: Currently we have another storm moving in for Thursday, bringing us more steady rain and some breezy conditions for the day. Expecting between a half inch and one inch of rain Thursday afternoon into the evening hours. Winds in the morning are expected to be in the 10 to 20 mph range backing off in the afternoon hours as the steady rain moves in.

Thursday night the storm moves out of the area leaving us with partly cloudy skies overnight. Friday is expected to be breezy, with wind gusts to 25 mph but partly sunny. Still cool though with highs in the upper 50's to low 60's.

Saturday and Sunday we are expecting mostly cloudy skies, but only a slight chance of showers. Temperatures are expected to reach the mid 60's on both days, with lows dipping near 50°F. The start of the next workweek appears to remain cloudy with a chance of showers at times through next Wednesday.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: First storm of the season arrives Friday

Thursday, September 16, 2021

 

Overflowing stream in Lake Forest Park.
October 10, 2015, photo by Carl Dinse.


Days are shortening and nights are cooler after a very dry summer, but our first real signal of a changing season arrives Friday. A moderate Pacific storm is already knocking at our door as it moves in Friday bringing light but steady rain in the morning hours. Windy conditions are expected as well in the late morning and afternoon hours.

Animated satellite in geo color mode from the National Weather Service Thursday night 

As seen in the above satellite loop, a storm system that is more typical for late October or November is arriving in our region. Widespread soaking rain is expected starting off slow at first Friday morning but ending Friday evening in moderate to heavy rainfall. Up to one inch of rain is possible in the Shoreline and Lake Forest Park areas by Saturday morning.

Winds: It will be windy too, not a major windstorm but more wind than we've seen in several months. Winds out of the south will start to increase in the late morning to afternoon hours. Wind speeds are expected to be around 15-30mph with some locally higher gusts. There might be a few isolated power outages in the area since this is our first strong wind and foliage is still on all our trees.

Weekend: Stormy weather continues through the weekend, with a slight chance of thunderstorms starting late Friday night and lasting through Sunday afternoon. Some areas could pick up an additional inch of rain leaving us with a 3-day rain total up to 2 inches in places.

Next week: Most of next week we are expecting mostly cloudy skies with a chance of showers. Tuesday looks to be our sunniest and warmest day of the week with a high temperature near 70°F. Otherwise expect to see high temperatures in the mid 60's and lows near 50°F for most of the workweek.

Bottom Line: A lot of rain is expected this weekend. Some areas may have local standing water or urban flooding due to clogged drains. There will be wind as well, but more in the breezy category rather than windy category. Only isolated power outages are expected, if any. 

If you have any storm drains around your home, it would be a good idea to go out and check on them to make sure they're not blocked up with leaves or other debris Friday and during the weekend.


For current weather conditions visit www.shorelineweather.com



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WeatherWatcher: Excessive Heat Warning in effect

Wednesday, August 11, 2021

 
Sunset somewhere in Shoreline on July 17, 2021
Photo by Carl Dinse

The National Weather Service in Seattle has issued an excessive heat warning in effect until 7pm Saturday. Dangerously hot conditions with temperatures running into the low to mid 90’s Thursday and Friday, and highs still near 90°F on Saturday. The warning covers all of King County; however if you go over the border into Snohomish County the warning expires at 8pm Friday.

This is not a repeat of the end of June, we are not expecting triple digit high temperatures. Most of the heat is expected to stay east and south of downtown Seattle. I’m expecting Shoreline to reach the 90's Thursday and Friday. Saturday highs will cool into the mid to upper 80’s. 

What to expect: As with the previous heat wave, the closer you are to the Puget Sound, the cooler the high temperatures are expected to be. So, in the Shoreline area look for an east to west gradient with highs near the Sound in the mid 80’s to around 90°F Thursday and Friday. Inland from around 8th Ave NW and east to the city limits you can expect to see temperatures top out between the upper 80’s to mid 90's.

For the folks in Lake Forest Park, some of you could see a stray upper 90's high temperature on Thursday and Friday. Low temperatures are expected to bottom out in the low 60’s through this heatwave. This should bring us much better relief in the overnight hours than we had at the end of June.

Over the weekend we have a cooling trend. As I mentioned earlier, we’re expecting Saturday to top out around the mid to upper 80’s and Sunday is dropping down to the 70’s. Rain is back in the forecast as well, with a slight chance of rain Sunday afternoon and more significant chance of rain Monday morning.

For next week, look for clearing Monday evening with lows in the 50’s. Mostly sunny skies Tuesday through Wednesday with high temperatures in the 70’s and possibly low 80's.

How are we doing in August so far? With the Northridge weather station back online (located in the Echo Lake Neighborhood) I can start comparing data again to see where we stand on a 10 year average.

For temperature, we are slightly above average so far by about 1°F, mainly due to a couple of warm days. I'd like to point out, however that our nightly low temperatures have been right at average for this time of year. 

Daily high and low temperatures compared to 10 year average in the Echo Lake Neighborhood

Rain has been near normal for August as well. July recorded a nearly rain-free month of 0.08 inches total, compared to our average of 0.48 inches, so this is a welcome change.

Precipitation for the month of August compared to 10 year average in the Echo Lake Neighborhood.

Average rainfall total for August in Echo Lake is 0.74 inches. Currently we are just about on track at 0.22 inches and typically most of the precipitation in August falls in the second half of the month.


For current weather conditions visit www.shorelineweather.com




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WeatherWatcher: Slight chance of showers or lightning this weekend

Wednesday, July 28, 2021

 

Lightning view from Log boom Park July 3, 2008
Photo by Carl Dinse

We've enjoyed a very consistent weather pattern of sunny skies and temperatures, mainly in the 70's, for the past four weeks. There is a slight change coming this weekend, however. The North American monsoon has started up and been active for about a week now. Typically, during the summer months, we sometimes get sideswiped from the east by that monsoon activity.

Saturday evening and Sunday evening appear to be one of those times where there is a slight chance some of that monsoon moisture will make it over the Cascade mountains into our region. Warmer weather is expected as well, but nothing like that freak heat wave we had at the end of June.

Here's what to expect over the next few days and into the weekend. 

Thursday through Saturday morning we are looking at sunny skies and clear nights. Low temperatures near 60°F and high temperatures in the low 80's. Thursday is expected to be the warmest with mid 80's for a high temperature.

Saturday afternoon some of the moisture and clouds are expected to drift into the area. At this time, it does not appear we will see much more than clouds in the afternoon and cloudy skies overnight into Sunday. There is, however, a very slight chance of some showers, and even slighter chance of a lightning show with these clouds.

The best times for lightning viewing will be after 6pm Saturday, and the best locations will be places with a view of the Olympics or Cascade mountains. Thunderstorms are more likely over the mountains rather than over the lowlands. A stray thunderstorm or two may move over the area through the evening and overnight hours Saturday into Sunday morning. 

I want to be clear, most of the time when this setup occurs, these forecasts are a complete bust, as in some clouds happen but nothing else. Occasionally though, we get a very active lightning show and sometimes a severe thunderstorm overhead. I would keep plans in mind to stay within reach of a shelter from lightning through the weekend.

Sunday evening there is another very slight chance of showers, lightning, and thunder, but that is smaller than the chance Saturday evening. Temperatures through the weekend are expected to stay in the low 80's for high temperatures, with evening lows around the mid 60's.

We return to our regularly scheduled summer weather of sunny skies, clear nights, with highs in the upper 70's and lows in the lower 60's on Monday through the middle of next week.


For current weather conditions visit www.shorelineweather.com
Note: Northridge weather station is back online.



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WeatherWatcher: Excessive heat warning continues; forecast update

Sunday, June 27, 2021

 

Lake Ballinger fire during the record breaking 103.4°F heat.
July 29, 2009, photo by Carl Dinse.


Temperatures on Saturday rivaled those that we experienced during the all time record high temperature July 29, 2009. In 2009, the high temperature at the Northridge / Echo Lake weather station topped out at 103.4°F. SeaTac reported a high temperature of 103°F as well, setting the all time record high temperature for Seattle.

Saturday's high temperature at SeaTac was 102°F, falling short of meeting the all time record. Lake Forest Park, on the other hand, had one personal weather station report a high temperature of 105°F near Kenmore. 

Most stations across Shoreline were between 97 and 99°F, except in Richmond Beach where my station there recorded a high of 93°F. Most spots in Lake Forest Park were reporting 100-102°F. That east-west temperature gradient was verified, but temperatures were hotter than originally forecasted.

Sunday and Monday (especially Monday) records will likely fall across the entire region. Sunday's forecast calls for temperatures in Shoreline to be between 95°F to 108°F, with the coolest near Puget Sound and the warmest near Lake Washington in Lake Forest Park. 

Monday could see temperatures peaking out at about 100°F near Puget Sound and possibly up to 115°F towards Lake Washington through parts of Lake Forest Park and the Sheridan Beach neighborhood.

We are seeing forecasted temperatures for Monday at SeaTac anywhere between 103°F to 119°F. Same would go to our neighbors on the east side, and most of the interior east of I-5 in the Puget Sound lowlands.

The forecast for the remainder of the week does not offer a lot of relief. High temperatures Tuesday through Saturday are still expected to remain in the mid to upper 80's, with some days near 90°F. 

A marine air push Monday evening may bring cooler overnight temperatures to places close to the Puget Sound, but a lot of the heat in the area could mix and move around, keeping overnight temperatures in some local spots above 80°F.

The excessive heat warning issued by the National Weather Service at this time remains in effect until 9pm Monday evening. 


For current weather conditions visit http://www.shorelineweather.com 

Note that only the Richmond Beach station is operational at this time. I am currently working on resolving the problems the Northridge station has been dealing with over the past year.




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WeatherWatcher: Excessive heat warning issued, historic heatwave on the way

Friday, June 25, 2021

 

Sunny Weather in Shoreline.
Photo by Carl Dinse.


The National Weather Service in Seattle has issued an excessive heat warning for the greater Seattle area including the cities of Shoreline and Lake Forest Park. 

From the National Weather Service:
  • Dangerously hot conditions with highs warming to the 90's and peaking near or above 100°F Sunday and Monday
  • In effect from 2pm Friday until 9pm Monday
  • Impacts: Unusual warmth and record high temperatures will significantly increase the potential for heat related illness, particularly for those working or participating in outdoor activities and for the elderly and those without air conditioning
  • Nighttime relief from the heat will be reduced in urban areas which will remain warmer later into the night. Low temperatures will be in the 60's to mid 70's
High resolution models are out now and the latest forecasts from these indicate some relief for Shoreline, but Lake Forest Park may suffer more. Friday is expected to have highs in the low to mid 80's. Saturday is the transition day, with high temperatures reaching into the 90's.

Sunday and Monday is when the heat turns on in full force. There will be a 3-7°F temperature gradient between the Puget Sound coastline and Lake Washington/Kenmore. I-5 will roughly be the point from east to west where the transition of slightly cooler temperatures is expected to exist.

Sunday: East of I-5 will see temperatures peak out in the high 90's to near 102°F. West of I-5 high temperatures will be closer to the mid 90's.

Monday: East of I-5 high temperatures could reach to 95-105°F, west of I-5 near 92-100°F.

Our low temperatures are not looking great either, with a Saturday night low near 70°F, and Sunday night lows in the mid 70's. Monday night low temperatures should make it into the 60's as marine air starts to make its way inland again.

If you're looking for cooler air without driving to the ocean, areas along the Puget Sound in Shoreline and up through Edmonds and Mukilteo will be the cooler spots during this heat wave. The high resolution models only show highs into the low 90's along that edge for all three days.

The east side (Bellevue, Kirkland, Bothell, north through Monroe and Lake Stevens) will be brutal, with highs there are expected to reach between 108°F and 112°F, especially on Monday.

Tuesday, Wednesday and Thursday next week are expected to be cooler, but still pretty warm for this time of year, with highs in the mid 80's to near 90 through the week. 

June heat waves are very rare, but we have had them before. Seattle recorded one other June day at 100°F on June 9, 1955. Stay safe out there, and know that next weekend should a bit nicer. Longer range models indicate highs just barely breaking 80°F July 1st through 4th.


For current weather conditions visit http://www.shorelineweather.com



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WeatherWatcher: Windy day ahead - particularly for our neighbors in south county

Thursday, May 27, 2021

Photo by Carl Dinse

A wind advisory has been issued for the immediate north of Shoreline, which includes Edmonds, Lynnwood and Everett. Gusts to 50mph are possible there.

Shoreline is expecting gusts to 35-40mph until around 7pm today, Thursday, May 27, 2021.

Since all of our deciduous trees have leafed out there is potential for wide spread tree damage and scattered power outages. Also a thunder clap or two can’t be ruled out for later this afternoon and evening.




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