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Second Wave of Snow Arrives This Evening

April 14th, 2021
The second wave of snow will bring more accumulations to much of the state, however most...
The second wave of snow will bring more accumulations to much of the state, however most locations will see less than 2 inches with the exception of Fremont County and parts of Hot Springs and Washakie Counties.(KGWN)
Published: Apr. 14, 2021 at 12:09 PM CDT
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The first wave of snow with this weeks system arrived overnight and into this morning for much of Southern Wyoming along the I-80 corridor, and it wasted no time causing headaches on the interstate as I-80 from Laramie to Rawlins was closed by 3:30 am MDT. It wasn’t much later when I-80 EB closed to rolling closures from Rock Springs to Rawlins and WB due to winter conditions from Cheyenne to Laramie. That line of snow is now scattering as it continues to move more northward, allowing things to clear up a bit along the I-80 corridor during the afternoon hours today.

That break will be short lived as more showers will begin to populate in South Wyoming along the I-80 corridor again heading into the evening hours. This will become more organized and form a second line similar to last nights during the late evening and early overnight hours as it also pushes north, reaching further north than the first wave did. This will be the first good opportunity for Casper to begin to see snow accumulations this week before the heaviest snow arrives for much of the state tomorrow evening. Cheyenne will also see some accumulations from this second wave, though they will be about the same if not less than what the city saw last night.

Impacts from the second wave could potentially cause I-80 to close through the Medicine Bow once again tomorrow morning, however closures on I-25 near Casper are not anticipated. Things may get a bit slick on the interstate, but I-25 does not close at nearly the rate that I-80 through the mountains does, so as long as we drive cautious on it things should be fine. Accumulations for most locations out of the second wave will likely be under the 2 inch mark, though Fremont County looks to receive the most as there is a good amount of moisture hovering over the region for today. Lander, Riverton, Dubois, and even Thermopolis in Hot Springs County will likely see around 4 inches of accumulations between now and 10 am tomorrow morning.

As for tomorrow and Friday...things are becoming more clear now, with the southeastern corner of Wyoming and the western part of the Nebraska Panhandle set to see the most snow from the system. Models are agreeing more on where the low pressure is going to track, and accumulation numbers are looking similar as well. The one area they still disagree on is Fremont County, with the American Global Forecasting System (GFS) forecasting almost a foot of snow for Lander while the European Center of Medium Range Weather Forecasting (ECMWF) is only calling for about half of that. Numbers could change by tomorrow, but to ballpark it as of now Cheyenne will be looking at somewhere between 7 and 9 inches with Casper at about 4 to 6. Laramie looks to see about 4-6 inches as well, though it will likely fall on the lower end of that thanks to the Laramie Mountain Range to the East.

CHEYENNE, Wyo. (Wyoming News Now) -

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