2/27: SNOW very Likely for WY beginning Friday

EVENING FOLKS!

Quite a Mild and 'not as breezy' Thursday for the Laramie Range with Highs in the Mid to Upper 40°s, even a 50° in Cheyenne!  

Anyone ready to get the BREAD & MILK? 
** This is how many people back in my Hometown and Region react when Snow (even Light Amounts) is in the Forecast >>>THEY SAID SNOWWWWWW **


LATEST Watches and Warnings for the Upcoming Storm:

Warnings ~PINK
Watches ~ BLUE
Advisories ~ PURPLE










Latest RADAR from Thursday 8PM:

<< Snow Showers could still be falling for Southwest WY in Uinta Co through this Evening from Evanston to Lyman. Watch for Slick Spots and some blowing snow possible.







WEATHER MODEL TALK:

 - 1ST Off, all Three Big Long Range Models I use to Forecast still show the Big Snow arriving Overnight Friday through early Saturday Afternoon.  A Frontal Boundary stalls along I-25 as a Strong Low moves into Idaho and drops Southeast through Southwest WY. On top of that, COLD Arctic Air invades in MT and the Dakota's as High Pressure builds with Temperatures in the Lower Teens or Single Digits.  The High brings an Easterly Wind Component while the Low brings South/Southwest Wind.  Moisture will move over the Cold Easterly Wind and lots of Snow is "Possible" in Central WY.  

- 2ND,  I have been closely watching the "unpredictable" NAM Model all day today.  BAD News, it Trended Wet and Moist for Central WY. I discussed Upslope and Isentropics in my Last Blog so if you are confused on them, refer back to my Wednesday's post.  The Over-Running Moisture (Isentropics) is possible for Southern WY as I think parts of Central WY and Laramies may experience an Upslope Effect (Wrap-Around) Flow of a Low. But if we look at 10,000 Feet up, it shows a Southwest flow for Central WY.    In other words, a very challenging forecast for a Moisture-Rich storm. 

BRIEF TIMELINE for Storm System #1 as we roll into the Overnight Hours and last through Friday "Early" Evening:

** ONCE We move into Late Friday and through Saturday Morning, Hazardous Travel is very likely for a good chunk of I-25 & I-80 Corridor as Moderate-Heavy Snowfall (1-2"/HR) Rates are possible. **







FRIDAY'S Forecast:
<< Once the Cold Front drops through I-90 and into the I-25 Corridor, Temperatures will drop with Snow Showers likely.  Snow Showers are possible through the late Morning and Early Afternoon so visibilities will be reduced.  







THOUGHTS:  As you see, I DID NOT release any Snow Amounts this Evening and in this Blog. Still a few Questions remain for me since will this Cold Air dry out any Moisture for Snow to dump in Central/Eastern WY?  Plus, will the Low stay on track from CA to Idaho and slide into Southwest WY?  Models slowly tend to agree with each other, but the Best thing is that we have ONE More Day on Friday to Forecast.

  *MODERATE to HEAVY Snow is Still Possible where a Winter Storm Warning/Watch is Out*

-ms