WeatherWatcher: Weekly Weather, another dry spell on the way

Sunday, January 27, 2013

  • The week ahead
  • Snow chance for the rest of the winter
  • Last week's weather statistics
The week ahead: This week will start out wet, mainly showers, with rain at times through Tuesday. Later in the week it looks like another ridge of high pressure will dominate our region, keeping weather systems clear of us through the next weekend. Burn bans may pop up again later this week and we may have more locally dense fog, not unlike the week before last. It may not be as cold as it was during our last dry stretch.

Snow chance for the rest of the winter: Early in January there was a sudden stratosphere warming event at the north pole. This is the layer of atmosphere that is above the cloud tops of most storm systems. When these events occur it splits up the north pole vortex (which is a large low pressure system that keeps the cold air locked up in the north pole.)  This typically happens about 3-4 weeks after the stratosphere warming event.  The vortex has been split into two areas, one over Russia, and the other over the Hudson Bay in Canada.  Most models appear to be agreeing now that the one over Canada may shift west around mid February, if it moves far enough west we could get one or two more good shots of arctic air. If moisture is in place, we may see a wide spread snow event.  Winter isn't over yet, and we've had some snow storms move through our area historically as late as April.

Last week's weather statistics:
High temperature: 48.0°F (Friday)
Low temperature: 28.8°F (Tuesday)
Rainiest day: 0.28 inches (Wednesday)
Total rainfall: 0.52 inches
Warmest day: 43.5°F (Friday)
Coldest day: 32.4°F (Monday)
Average temperature: 36.5°F (3.3°F colder than 3 year normal)
3-Year average temperature for last week: 39.8°F

Temperatures so far this month

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, starting Saturday morning at midnight. All weather data unless otherwise noted is sourced from Carl's Shoreline Weather.

For winter storm updates, check out my weather station web page or follow me on Twitter: @SWeatherWatcher


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