The first 3 weeks of November 2021 have been particularly mild with little snow across Star Valley. The higher mountains also are below normal in beginning the winter snow pack. The forecast models are now confident that going into December conditions will remain drier than normal and seasonably mild across Star Valley and surrounding areas. Here are some charts and forecast in support of this scenario. The current week there is a fast moving disturbance that will bring some light precipitation Tuesday night and Wednesday. Snowfall amounts in the mountains should be light with little in the valley.
Here is the forecast for the current work week for the U.S. showing the light precipitation in our area mid week. By Thanksgiving day mostly sunny skies will return.
The large scale upper wind pattern that is resulting in the quiet weather over much of the West is expected to continue through the last week in November with high pressure shunting most storm activity from the Pacific Northwest into Canada and then across the Eastern States.
Mean 500mb flow from November 21-December 1st.
This pattern leads to the forecast of a dry and warmer than normal pattern over much of the rest of November.
While precipitation across Star Valley has been beneficial the last couple of months, due to the mild temperatures, the nearby mountain snowpack is below normal.
Precipitation around Star Valley has been generally above normal since August. Here is the chart for the past 30 days as of 21st of November showing the area continues to receive above normal precipitation.