|GOES Water Vapor Imagery Sunday evening 1/29/12|
The first system should spread snow across much of Star Valley beginning by early Monday afternoon. Amounts should be greatest in the surrounding mountains with a couple inches possible in the Valley by evening.
The next weaker disturbance will likely continue a threat of at least some light snow going into Tuesday with a possible overnight break between systems.
The major change in the pattern will begin by mid week as an upper ridge of high pressure builds strongly into the Western States and then dominates our region at least through the coming weekend. As seen in the model forecast for this coming Wednesday evening one last upper level low pressure wave will be moving toward Star Valley as the strong upper ridge builds toward the West Coast.
|500 mb level forecast for Wednesday evening 2/1/2012|
Then the strong ridge of high pressure builds across much of the northwestern States and shuts down the active weather for an extended period. The 500 mb forecast for next Sunday strongly supports this idea of no snow after about Wednesday night for an extended period.
|500 mb Forecast Sunday 2/5/2012|
The higher sun angle the first week in February compared to the extended stagnation period experienced in December should be a little more effective in daytime warming keeping temperatures above the cold ones in December.