Another Winter Storm Wednesday and Thursday?

The National Weather Service
Building a Weather-Ready Nation

Summary | Forecast | Monitoring & Reporting Snowfall | Safety

Another winter storm could potentially bring widespread snow to the region mid to late week. A Pacific low pressure system will dig along the west coast on Tuesday and enter the four corners region by Wednesday afternoon, with snow beginning to impact Wyoming as early as Wednesday morning with widespread snow possible Wednesday evening through Thursday night. There are still some model differences in the track this far out, significant differences that could mean the difference between a storm as large as the last one that with potential for another foot or more in Lander and south Casper...or some model solutions suggest that the storm will be too far south to result in only an inch or two of accumulation. However, because of the potential impact of this storm on the lower elevations east of the Divide, we recommend that you keep an eye on the forecast this week to see how this storm develops.

For more information on the storm, take a look at the latest Special Weather Statement and the  Multimedia Weather Briefing.


Model guidance has been wavering with this storm. The picture on the left shows the ECMWF's solution for the low position on Wednesday afternoon, the arrow shows the forecast track of the low through Thursday morning. The picture on the right is the preliminary snowfall forecast for Wednesday through Friday morning. Remember - there is still a lot that could change the forecast snow totals this far out, these values represent an average of the different model solutions.



                               CLICK IMAGE TO ENLARGE

The picture above shows the expected pattern on Wednesday afternoon. The low will be moving into the four corners region and into Colorado by Wednesday night...setting up much of central Wyoming in a favorable upslope pattern - depending on the track of the Low. If the Low tracks to far south, then most of the snow will stay in Colorado, if it moves further north, then Wyoming will recieve substantially more snow. The orange arrow represents the average of the model solutions and their track over the past few days. The most recent model runs have been trending further south.

                                 CLICK IMAGE TO ENLARGE

        This picture shows roughly how much snow you can expect where you live.

A Sampling of Possible Snow Accumulation ranges (inches):
Casper:    3-6
Riverton:   2-5

Dubois:     3-5
Lander:     6-11
Rock Springs: 1-3
Jackson:   1-3
Buffalo:     1-3





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