Thursday, October 30, 2014
A ridge of high pressure will keep our beautiful weather around until a strong Pacific storm currently bringing precipitation to the northwest affects our weather starting this weekend. Even California looks to receive significant precipitation as the storm makes landfall there late Friday night.
Southwesterly flow ahead of the storm will bring increasing moisture into our area on Saturday, though temperatures will be warm with high clouds. As the storm approaches the Great Basin on Saturday it is expected to split, making the forecast for Sunday through Tuesday a bit uncertain.
Current forecasts have a lead shortwave moving over our area early Sunday with some precipitation expected, though it will likely be light and relatively warm, with high snow levels. Cool air will filter in through the day Sunday, but most of the storm will be felt as the southern portion of the storm approaches our area later that day or evening.
The American GFS keeps this southern energy over our area during the day Monday, leading to snow and sharply colder temperatures as northwest flow is established behind the front. Snow may be moderate to heavy at times Monday, even in town, before ending that night. The European ECMWF, on the other hand, is forecasting more energy left behind in the Great Basin, and in fact closes off the storm and forms a cutoff low that moves over the U.S. - Mexico border later in the week. This solution would lead to warmer weather and less precipitation as energy passes south of us, though the unsettled conditions would be with us longer, likely through Tuesday.
In either case, a flat ridge is forecast behind the storm, leading to warmer temperatures by mid-week and lasting through at least the rest of the workweek. A storm from the Gulf of Alaska is currently forecast to stay north of us for the following weekend, though that forecast is uncertain at this time.