Details Regarding Tonight's Snowstorm

A Low Pressure system originating from the west coast will track across the Great Basin this weekend.  Moisture ahead of and associated with this storm system will spread across much of Wyoming Today and early Sunday.  This moist flow from the southwest will spread atop a dome of cold air that will surge south through central Wyoming by this evening.  The snow has already begun in some areas and continue until around sunrise Sunday.  The snow could be heavy at times late this evening and early Sunday morning.  This pattern sets-up favorably for the best chance of heavy snow to occur east of the Continental Divide, mainly in Fremont, Hot Springs, Johnson, and Natrona counties.  The watch has been upgraded to a Winter Storm Warning for these areas.  A Winter Weather Advisory has been issued for much of the remainder of the County Warning Area - see our Homepage for details. Forecast snowfall amounts can be seen in the image below.

Forecast Snow Totals Saturday Through Sunday
 *UPDATED* Forecast snow totals from Saturday afternoon through Sunday morning.
(February 19 and 20)

Gusty northerly wind will increase behind the surge of cold air from the north on Saturday.  Some of the windier locations will be across northern Johnson County where the snow and wind could create hazardous travel conditions on I-90 and I-25.  Interstate 80 across eastern Sweetwater County may also experience a period of reduced visibility Saturday evening due to the snow and wind.  The mild temperatures of this past week will also come to an end this weekend.  High temperatures will be below average by Sunday at most locations.

Stay up-to-date with current developments and trends regarding this storm system.  Visit the Wyoming Department of Transportation road and travel website or call 1-888-WYO-ROAD (1-888-996-7623) or 511 for the latest road conditions.  Visit our complete webcam listing to view sites across western and central Wyoming.  This weather system will have travel impacts across not only Wyoming, but neighboring states as well, through at least Sunday morning.  For weather updates from surrounding states visit

Return to Riverton WFO Homepage

- Web story last updated at 11:00 a.m. Sat., Feb. 19 -

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