WeatherWatcher: Weekly Weather Feb. 11-17 - new arctic outbreak brewing north of us will strike next weekend

Tuesday, February 21, 2012

Last week's highlights, heavy rain event.
The week ahead, and a new possible arctic outbreak.
Last week's weather data.

Last week's highlights
Friday we had a fairly intense but narrow cold front blow through, dumping 0.4 inches of rain within 1 hour during the early evening hours. Rain was so heavy at times that visibility was reduced to less than a quarter mile.

The week ahead
  • We have a significant load of rain heading our way, and mountain snow for those traveling the passes or into snow sports. We will progressively cool down throughout the week, starting with highs averaging around or slightly above the mid 40's and cooling down to the upper-mid 30's for highs towards the end of the week. We are expecting about 2-5 inches of rainfall this week, urban flooding may be a concern, especially on the major creeks in Lake Forest Park.
  • Starting next weekend, models are indicating and universally agreeing on another strong arctic blast, this one appears to have potential to last at least 4 days. Some models are indicating possible thunder snow showers over the weekend as well. We have a strong cold air mass building in British Columbia, Canada and the storm track is shifting out of the Gulf of Alaska later this week so conditions will be favorable for significant lowland snow once again. I will continue to monitor this situation and post updates as this develops.
Last week's weather data
  • High temperature: 47.5ºF (Saturday and Friday)
  • Low temperature: 34.5ºF (Tuesday)
  • Rainiest day: 0.48 inches (Friday)
  • Total rainfall: 0.85 inches
  • Warmest day: 44.8ºF (Saturday)
  • Coldest day: 38.3ºF (Wednesday)
  • Average temperature: 41.6ºF

Warmest and coldest days are based on average temperature of the entire day, starting at midnight. All other averages are based on the whole week. All weather data unless otherwise noted is sourced from Carl's Shoreline Weather Station.
twitter: @SWeatherWatcher


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