Happy "Meteorological Winter", but don't worry..that Winter feel will be in full force beginning Monday for Central WY. Officially the 1st day of Winter Solsice begins December 21st.
Okay lets get to the Snow. AS OF 6PM Sunday, spots in Western WY including Rendezvous Peak has seen over 5"
MONDAY looks to be Blustery for much of Central WY and also along the Laramies & I-80 as winds will Howl through the Day but staying Dry & Mild. However, Moderate to Heavy Snow continues for Western WY. As we head into Early Evening, the Cold Front is forecasted to slide into Western WY and could increase that Snow chance for the Bighorns too along that WY/MT Line
<< A Strong (996MB) Upper Low should move over the I-90 Corridor through the Day and this Map shows the 5PM Time Frame on Monday. Still dry in Central WY, but Blustery.
LATE MONDAY NIGHT/OVERNIGHT Hours for Central WY shows the Cold Front now blasting through in Riverton/Casper area. This is where "Light" Snow could start falling after the 11PM Time frame. And with the strong Pressure Gradient, expect any Light Snow to blow around as it will stay breezy. (IMAGE BELOW)
TUESDAY MORNING looks to be quite Hazardous for the Morning Commute. Blowing Snow likely with Light to Moderate Snowfall "Possible" for Casper area. WHY I think that is because of a Low developing in Northeast CO providing Upslope with North/Northeast winds wrapping around the Low.
As for Southeast WY, the Cold Front should be moving in at this Time, but staying Dry. Light Snow is possible for the Wind River Basin and along I-80.
But for right now, I think CASPER could be seeing the Brunt of the Activity at this Time for Tuesday Morning.
All through the Day on TUESDAY looks Hazardous. Blowing Snow, COLD Temperatures so please SafeTravels if your venturing out. I do think the Snow could come to a "Lull" in the Activity as Flurries are possible. However, IF you are traveling South of Cheyenne towards Denver, it could be Dicey. A "New" Low will form in Central CO dumping Moderate Snowfall possible for the Denver area and certainly over the big Ski Resorts in the Rockies to our South! (IMAGE BELOW)
WEDNESDAY is where the Weather Models begin to vary and Disagree. 1st, lets get to the NAM Model. Maybe a few Flurries or a stray Snow Shower for Central & Southeastern WY as we'll stay Mostly Dry and COLD! But, lets get to the GFS Model and discuss this. The BIG Snow in Colorado will have some weak Jet Stream lift and could slide in some Light Snow all along the I-80 Corridor through the Day with another Rd of Snow possible. Light Snow is still possible for Central WY but its pretty much confined down towards Cheyenne area. As Late Wednesday rolls around, NAM still shows ARCTIC COLD Temps for much of Central & Western WY as we are Dry and maybe a Few Flurries for the Laramies. (IMAGE BELOW)
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| GFS at 5PM WEDNESDAY |
THURSDAY looks to be COLD with Northwest Windflow diving into all of Wyoming. Most of WY will stay dry, however the GFS paints a few Flurries for the Cheyenne area.
** IT WILL BE COLD! ** Depending on how much Snow-cover, Clearing Skies & Light Winds will determine How Frigid it will get. After the Snow passes, EACH Overnight should stay Cold with Below Zero Temperatures from Wednesday and through Friday Mornings. BUNDLE UP.
<< This is the Temperature Map "forecasted" from the GFS showing Below Zero for all of WY and about 5-15° Below Average for much of Central & Eastern WY by Friday Morning.
SO HOW MUCH SNOW? As Always guys, please keep these Amounts with a "Grain of Salt" from these Models. The Storm Track can shift these amounts ever so slightly but this is from the NAM Model.
From looking at this, WESTERN WY will and all of the Mountains will likely see over a Foot and a Half, possibly 2' in some spots. Plus, the Bighorns could get blasted with that wave moving in Monday Afternoon.
Lower Elevations: The NAM shows very sparse Snow for the Basins, including Lander.
CASPER: As I showed you earlier, the Upslope Machine could give the "City" Light to maybe Moderate Snow Amounts of 2-5". The Mountain could see 6-10" & north of Glenrock could see some Moderate Snowfall.
The METEOGRAM out of Iowa St shows a "Range" of Snow from various Weather Models and does quite well for Snow Amounts.
<< This is for the "Airport" in Casper. So they show a range of 1.5-3.5" So in the City, I expect more since its closer to that Upslope Effect.
Other Amounts for Cities from the Meteogram: Riverton/Lander ~ 1-3", Sheridan ~ 2-5",
Cheyenne ~ 3-7" DENVER 4-8"
THOUGHTS: The Monday Morning Data could change so slightly, but its getting close of not Forecasting in advance now with this Storm as its on our Doorstep. I do think this is beginning to take shape a Major Snowstorm for Western/Central CO after it leaves Western Wyoming and the Bighorns. BUT...it could change. These past few Days with the Storm has been inconsistent so I wouldn't be surprised if it changes once again by Morning with the new Data. ADVISORIES will likely be Issued for the Snow so Stay Tuned to my Blog/Posts through the next Few Days.
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