First Wave of Snow Arrives Tonight
April 13th, 2021
The new pattern has officially taken hold now that we are entering the heart of the second full week of April. We saw a few snow showers late Sunday/early Monday to kick off the new week, but the more organized snow will begin later on tonight in the southern half of Wyoming, likely bringing a few inches of accumulations with it.
The jet stream is beginning to dip in the western half of the US, forming a trough and generating a new low pressure system in the southeastern corner of Utah. This will begin to push northeastward throughout the day today until it makes its way into northern Colorado tonight. That is when the snow will begin to enter the southern half of Wyoming, slowly creeping further north through the overnight hours until it scatters into showers tomorrow morning. The area to watch tonight will be the I-80 corridor, as much of the interstate across Wyoming will be seeing snowfall through the overnight hours. Cheyenne to Evanston along I-80 will likely see snow tonight into tomorrow morning with an off chance that it reaches as far north as Casper in Natrona County.
Temperatures during the overnight hours tonight will plummet into the lower 20s, which is more than cold enough for some snow accumulations especially given that we have already cooled off around the state to kick off the new week. The higher elevations along the I-80 will likely see low temperatures crack into the upper teens overnight, so accumulations may be even higher in those areas. This naturally will lead to some issues on I-80 during the morning hours as people begin to commute to work and traffic along the interstate is expected to pick back up.
To accompany the snow tonight, strong winds are likely in the southwestern corner of Wyoming, so there could be the wind issues on top of the snow issues for I-80 in Uinta, Sweetwater, and even Carbon Counties. Rawlins looks to be the heavy spot overnight in terms of accumulations as well. While a full closure of I-80 is not expected ahead of tomorrow, there may be a few areas that do get closed down, with the Medicine Bow Region between Laramie and Rawlins set to see the most snow and the western parts of I-80 likely to deal with blowing snow that will greatly reduce visibility.
The low pressure system will stall out over the Rockies tomorrow, however snow activity is likely to be showers during the afternoon with an opportunity for some rain showers to the south of I-80 in Carbon and Sweetwater Counties. Another more organized wave is set to push further north through the state tomorrow night and into Thursday morning, which is when higher snowfall amounts will finally make their way to Casper, Douglas, and Riverton before the heaviest snow arrives Thursday evening as the low fully strengthens on the eastern side of the Rockies before pushing southeast.
CHEYENNE, Wyo. (Wyoming News Now) -
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