Some have already experienced Rain this evening in Central WY and even some Light Snow reports from Dubois. I do think we'll stay mostly 'warm' for plain Rain through the Evening as Overnight Hours. However, our Colder Air will arrive by Dawn on Monday to transition our Snow/Mix Precipitation when we head out to work.
I want to say that it could take a while for the Precip to changeover since there could be some Drier Air working in.
< Our Low Pressure (1008mb) is still a little weak, but will form off the Laramies and into Northeastern CO by Monday Morning and looking like the Bighorns and Absaroka's could experience Moderate Snow.
Central WY could experience that Mix or Light Snow during the Commute to Work but we will see how much of the Precip will fill in.
<< NAM by 12PM Monday shows a stronger circulation at 1004mb in Western NE with Northwest Wind flow in Central WY wrapping around the Storm with Snow.
Could be a decent Snow for Bighorns & Black Hills if the storm verifies the NAM, but the GFS is much weaker at Noon with a 1008mb Low and not as Fast.
Now I think we can continue the Light Snow/Flurries through 6PM in Central WY, but the activity should diminish as Midnight Monday roles around. Any snow should stay to the Northeast in the Black Hills as the Big Storm will be near Sioux Falls, SD.
TUESDAY: NAM shows a few lingering Flurries, while the GFS stays Dry, but the day should stay Cool and Chilly.
HOW MUCH are we looking at? Before the Amounts, here are the very latest Advisories in Wyoming in regards to the Storm
*1-3" I'm looking at for Riverton/Casper and locally more for South Casper and for Lander .
* A Half-Foot or so on Casper Mtn and the Northern Laramies where over a Foot is expected in the Bighorns and possibly in the Black Hills.
I Will Keep you Updated through the late Morning and all Afternoon on Monday with the Latest Updates.
-MS
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