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Welcome to the National Weather Service Spokane, WA weekly weather briefing. This briefing
will be covering the expected weather for the upcoming week Monday, February 11th through
Monday February 18th 2013. Since forecasts are subject to change, please do not use this
presentation after 6 a.m. Wednesday, February 13th.
High pressure weakens Today and tomorrow. Moisture draped over the top of the ridge sags south
and into Eastern Washington and Northern Idaho bringing generally snow for mountains
and rain and mostly non accumulating snow mix Tuesday through Thursday. High pressure
then moves in again allowing a return of low clouds and fog late Thursday and on through
Friday and into Early Saturday. A cold front may bring breezy wind and more light snow later
on Saturday and into Sunday.
This Global composite satellite image shows the westward extend of the moisture feed drapped
over the top of the ridge of high pressure influencing the Western United States. This
moisture feed will influence mainly Tuesday into Thursday resulting in generally light
precipitation amounts through this interval.
This satellite picture shows the current location of the moisture fetch drapped over the
top of the ridge of high pressure influencing the Western United States.
High pressure weakens Tuesday through early Thursday and allows the moisture fetch
draped over the top of the ridge to sag south and result in a prolonged period of mostly
light precipitation from Tuesday on into Early Thursday with the mountains of Shoshone
county of North Idaho having the largest snow amounts.
This graphic shows our snow level forecast for Wednesday...with most locations
having a snow level between 3 and 4 thousand feet MSL.
Total snowfall amount from Tuesday morning through Thursday morning show low to no
snow accumulation for most valley locations with light amounts for North Idaho
Panhandle while highest snow amounts remain above 6000 feet MSL in Shoshone county of Idaho.
Some patchy dense fog with visibilities of ¼ mile will be possible tonight across lowland
and valley locations of Eastern Washington and Northern Idaho Thursday, Friday, and a portion
of Saturday. Sub-freezing temperatures may result in some slick road surfaces where fog
becomes dense.
Seven day forecasts for Spokane and Lewiston depict the minor chance for light snow Tuesday
through Wednesday with it lingering a bit longer into early Thursday for Lewiston.
Higher pressure returns showing fog/low clouds later on Thursday into Saturday and both
locations show the next cold front passage with very minor slight chance pops for
precipitation for later on Saturday into Sunday.
The 8 to 14 day outlook issued by the Climate Prediction Center shows near Normal to
below normal precipitation with below normal temperatures.
High pressure weakens Today and tomorrow. Moisture draped over the top of the ridge sags south
and into Eastern Washington and Northern Idaho bringing generally snow for mountains
and rain and mostly non accumulating snow mix Tuesday through Thursday. High pressure
then moves in again allowing a return of low clouds and fog late Thursday and on through
Friday and into Early Saturday. A cold front may bring breezy wind and more light snow later
on Saturday and into Sunday.
Here is how you can stay informed and get the latest information from the National
Weather Service Spokane Forecast Office. Our forecasts and various winter weather
products are available on our website weather.gov/spokane. Like us on facebook, follow us on twitter, and subscribe to us on youtube. And as always, you can listen to us on NOAA Weather Radio. Thank you for tuning in for this weekly weather briefing.