Meteorologist Jack Hales
April showers, rain and snow provided a beneficial boost to the runoff that is underway in Western Wyoming. Given the below normal winter snowfall across much of the region, the active storm track that has been in place this Spring coupled with a wet Fall it is now looking to be a better than earlier expected water year, particularly in the Star Valley area.
As of April 30, the Snow Water Equivalent in the current snowpack is near or just below normal across much of western Wyoming, with poorer conditions to the south and west.
The abrupt improvement beginning the end of March has pushed SWE to around normal and now well above last year’s levels. As important is the normal peak of SWE prior to the runoff beginning, is already a couple weeks later, due to both the precipitation and cool temperatures.
Of note is that the total precipitation since Oct 1, 2021 is near normal and close to what occurred the previous entire Water Year reflecting the very dry early summer of 2021. At Star Valley Ranch April snowfall was comparable to both January and March of this year and well above what occurred in February.
Following are some rain/snow totals in the Star Valley area for April-
Star Valley Ranch 2.31 and 27 inches of snow
Bedford 3SE 2.42 and 25 inches of snow
Thayne 1 SE 2.40 and 28 inches of snow
Smoot 5 SSE 2.64 and 26 inches of snow
It appears that the active storm track will continue the first week or two of May across the region and the current longer range forecast reflects this pattern with above normal precipitation and continued cooler temperatures.