While we had pretty much given up the Sierra this season some light is at the end of the tunnel! Next storm system is coming in 2 sections. Sunday am-pm and again on Tuesday. The first piece of energy arrives during the day Sunday bringing a quick 4-8 inches to most locations of the central and northern Sierra by evening. Snow levels will be low so expect 2-3 inches at the base and higher amounts up top (Snowing at lake level).
We like the Tuesday system better! Cold air an abundant moisture will move in by daybreak Tuesday and continue through the evening. This system has the potential to bring 9-12 inches to upper elevations and 3-5 to the Valley floors. Models show direct hits over the southern Sierra (Higher amounts near Mammoth) and slightly less up north. Snow will be falling over the inland mountains of southern California (Big Bear).
Light snow will be falling over the Tetons Saturday night and Sunday. Some enhancement likely on Monday morning over Grand Targhee. The Wasatch will be teased with some light snow showers Monday. Action increases as the CA storm moves north towards the Wasatch on Wednesday morning. SW flow will bring at least moderate amounts to many areas by evening above 7,000 feet (3-6 or more). Winds appear to shift to the Northwest Wednesday night favoring the Cottonwoodsthrough Thursday morning (Moderate amounts possible). The Tetons grab light snowfall Wednesday night and Thursday.
Light snow will break out Wednesday night for most of the northern mountains. The models take the heaviest moisture from Utah over southern Wyoming (Heavy snowfall) Thursday. My forecast is calling for a good possibility of heavy snowfall over Steamboat Thursday extending to I-70 with moderate amounts. This system unlike the last several over the front range near Denver should do pretty well for areas favored by NW flow (Vail, Snowmass, Copper, Steamboat). The heaviest amounts may favor north of I-70 however models that far out are simply going to change. Current Powder Watch will extend from I-70 to the Wyoming border Thursday (Storm ski day).