Winter blast still timed for mid week
Friday, November 29, 2013
After a nice Friday and Saturday, a weak wave approaching from the northwest will produce some light snow showers beginning Sunday morning and continuing through Monday around noon. This wave is trending slightly stronger in the models, and I might expect 3-6” on the hill by Monday afternoon based upon this morning’s model runs.
A nice Monday afternoon and Tuesday before a storm currently moving across Alaska will affect our area perhaps as early as Tuesday night. . Some energy splits from this storm by Wednesday and drags cold air across the northern third of the west. The rest of the storm drops south along the west coast and turns the flow over our area to the southwest. Good snows by Tuesday night or Wednesday morning should occur along the frontal boundary in our proximity.
There are differences in how the storm to our west evolves, but cold winter-like temperatures are expected. Currently, it appears the front will become quasi-stationary over our area from Tuesday night through Thursday or so, keeping the coldest air to our north There will be periods of moderate to heavy snow as energy ejects from the storm to our west along the frontal boundary until a Pacific wave rounds a building ridge in the Gulf of Alaska and kicks the main part of the storm over us around Friday. More snow and colder temperatures are expected then, and into the weekend as additional waves of energy form the north move over the area in the very cold and unstable air mass.
The ridge in the Gulf of Alaska is handled differently by different models, so it is not clear if this winter pattern persists into the following week.