WEATHER UPDATE: Mix Of Rain & Snow Possible In Area Through Weekend


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The National Weather Service released an updated ‘Special Weather Statement‘ on Thursday morning, calling for “a mix of rain and snow showers possible across the lowlands of western Washington late tonight through Saturday. Accumulation is possible at some locations late tonight into early Friday morning and again early Saturday morning.”

Long special statement short:

  • Depending on your elevation and the wacky regional conditions, there could be some snow.
  • It won’t stay around long though so there’s no need to freak out.
  • And as the weather peeps themselves state: “there remains some uncertainty concerning the track of this system…”

Here’s the statement in its entirety:

1142 AM PST THU NOV 17 2011

…A mix of rain and snow showers possible across the lowlands of western Washington late tonight through Saturday. Accumulation is possible at some locations late tonight into early Friday morning and again early Saturday morning…

A cold upper trough moving southward along the British Columbia coast will settle over western Washington by early Friday morning. This trough will produce showers and bring very cold air aloft into the area. Temperatures near the surface will be cold enough for a mix of snow with rain showers across most areas through Saturday. However…higher hill tops and areas with persistent or heavy showers could see light accumulations of snow.

While most areas will not see any accumulation of snow… Model guidance continues to indicate the possibility of a convergence zone developing somewhere north of Seattle late tonight into early Friday morning. If this develops and persists long enough…accumulations of an inch or two could be possible anywhere from Seattle to Mount Vernon.

Another system passing to the south of the area early Saturday morning will bring an additional threat of lowland snow mainly to the south sound and southwest interior. There remains some uncertainty concerning the track of this system…which affects the potential for accumulating snow. There is enough potential for snow accumulation over parts of the southern inland areas that it warrants mention.

Colder temperatures are expected across western Washington through the weekend with widespread low temperatures falling into the low 30s tonight and into the mid 20s to around 30 degrees Saturday morning. As a result wet roadways may ice up tonight and will likely ice up Saturday morning…producing potentially hazardous driving conditions. Cold morning temperatures will occur again on Sunday morning with moderating temperatures during the afternoon.

Here’s the latest forecast for the next few days:

Tonight: Rain showers likely before 4am, then rain and snow showers likely. Snow level 1100 feet. Cloudy, with a low around 34. South wind between 7 and 11 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Friday: Rain and snow showers likely before 10am, then a chance of rain showers. Snow level 700 feet. Mostly cloudy, with a high near 40. South wind around 7 mph becoming east. Chance of precipitation is 70%. Little or no snow accumulation expected.

Friday Night: A chance of rain showers. Snow level 800 feet. Mostly cloudy, with a low around 31. North northeast wind around 6 mph. Chance of precipitation is 40%.

Saturday: A chance of rain and snow showers before 4pm, then a chance of rain showers. Snow level 400 feet. Partly sunny, with a high near 39. Northwest wind around 6 mph becoming south southeast. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Saturday Night: A chance of rain showers before 10pm, then a chance of rain and snow showers. Snow level 700 feet. Mostly cloudy, with a low around 28. South southeast wind around 7 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

Sunday: A chance of rain and snow showers before 10am, then a chance of rain showers. Snow level rising to 1200 feet. Mostly cloudy, with a high near 42. Chance of precipitation is 30%. Little or no snow accumulation expected.

Sunday Night: A 50 percent chance of rain. Cloudy, with a low around 35.

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