10/27: Early Week SNOW/Mix Talk

Well Folks,

Its time to say Farewell to the Beautiful Week of Weather much of WY experienced with Above Avg Temps and Dry Conditions as conditions deteriorate.

SYNOPSIS:
As we work into Monday our Low from the North in MT will continue to produce widespread Snow up there and sag South,  but will become misplaced and have trouble finding its identity.  ALL Week, I said the Models have had a hard time knowing what it wants to do?  Well... the same follow suit as 'Scattered' Snow Showers/Mix will spread into much of WY through Monday evening. The Cold Front will drop our Temperatures in the 30°s but RIGHT NOW, I am highly likely the Heaviest Snow should stay in the Wind Rivers, Bighorns, and Western WY Mountain Ranges.
  CASPER wise, not so much on the Mountain since our Low will track from our West into ID/UT so its not a better Upslope Snow Event though light Snow is possible.  

**LOWER ELEVATIONS**:  I think for Casper/Riverton, we should mostly see a Cold Rain/ Sleet Mix/ and maybe a brief period of Light Snow with little to no accumulation expected.  However, FOOTHILL CITIES (Buffalo/Sheridan/Lander) could see a better chance of Light to Moderate Snowfall Amounts since the Low will swing around the Mountains to provide Upslope Flow; North-Northeast Wind Flow Component.

** TIMING**:  Snow should start arriving by Monday Morning in the Mountains and could be Moderate at times where much of Central WY & Lower Elevations should stay Dry. MANY Models have had a hard time debating when the Precip will arrive in Central WY as the best time could start either late Afternoon or Evening with a mix possible if the Cold Air wraps around.  KEY Point are the Temperatures.  Anything above 40 is highly likely Cold Rain.  Below Freezing could be Snow, but a Mix is possible with Temps at or slightly above Freezing since we have seen a lot of Warm Temps past week.  The LOW will linger through the Overnight and a mix bag of Precip will linger through Tuesday.  Some Slick Roads are Possible so safe Travels IF some will see Freezing Rain Drizzle.   I think some light snow is still possible as some cooler air is possible to arrive Tuesday Evening.   RIGHT NOW, the Models show the Storm moving East by Wednesday and could push into the Plains.  We'll closely watch the timing as Monday's Models could provide better Forecasting Confidence.

NOT MY AMOUNTS, but here are what some Models are thinking with this Storm:

<< HERE is the Weather Prediction Center's "Winter Forecast Guidance" showing the Wind River's, Bighorns seeing over a Half-Foot easily and possibly the Uinta's too.  

To Read this Map the Legend is on the Far Left  with each color showing the different amounts in Inches  

<< NAM Snow Amount Shows the Heaviest Snows in the Wind Rivers.

Here, Lander could see up to 6-10" of Snow but not so much in the Bighorn Foothills of Buffalo and Sheridan.  

South of Evanston in the Uinta's, could be a nice Snow for them to help out their Snowpack.

 LATEST ADVISORIES For the Snow now issued for the Wind Rivers, Sheridan Foothills, Bighorns and the city of Dubois: