229
FXUS65 KRIW 291110
AFDRIW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
410 AM MST MON DEC 29 2025
KEY MESSAGES
- TEMPERATURES BACK NEAR NORMAL TODAY WITH NEARLY CLEAR SKIES.
- WARMING TEMPERATURES THROUGH THE REST OF THE WEEK WITH HIGHS
IN THE 40S.
- NO PRECIP ACROSS WESTERN AND CENTRAL WY THROUGH THE REST OF
THE WEEK, WITH ONLY LIGHT SNOW POSSIBLE FOR THE WESTERN
MOUNTAINS THIS WEEKEND.
DISCUSSION
ISSUED AT 132 AM MST MON DEC 29 2025
HIGH PRESSURE WILL BE HOLDING CONTROL ALONG THE NORTHERN ROCKIES
DURING THE NEXT SEVERAL DAYS, DEFLECTING THE STORM TRACK BACK
INTO CANADA AND KEEPING MILD TEMPERATURES GOING FOR WYOMING.
LOWS THIS MORNING HAVE BEEN COLD, WITH TEMPS WELL BELOW ZERO FOR
THE WESTERN VALLEYS, AND IN THE SINGLE DIGITS ABOVE ZERO EAST OF
THE DIVIDE. SOUTHWEST FLOW RETURNS TODAY, HELPING TO CARVE OUT
SOME OF THE COLD POOL THAT HAS SETTLED IN THE REGION. WITH THE
COLD POOL NOT OVERLY STRONG AND NOT REINFORCED BY ANY SNOWPACK,
EXPECT A GOOD RECOVERY OF TEMPERATURES INTO THE 30S THIS
AFTERNOON. WESTERN VALLEYS THAT DO HAVE SNOWPACK AND ARE
STARTING A LOWER TEMPERATURES WILL HAVE MORE TROUBLE GETTING
OUT OF THE TEENS THIS AFTERNOON. THIS PATTERN WILL CONTINUE
THROUGH THE REMAINDER OF THE WEEK, AS THE RIDGE HOLDS IN PLACE,
PUSHING SYSTEMS OFF TO THE NORTH AND CONTINUING TO CARVE UP ANY
REMAINING COLD POOL. MOST AREAS WILL BE BACK IN THE 40S BY
WEDNESDAY, WITH JACKSON HOLE AND STAR VALLEY HOLDING BACK A BIT
DEPENDING ON HOW FAST SURFACE SNOW THINS OUT.
THE RIDGE TRIES TO SHIFT MORE EAST LATE IN THE WEEK, OPENING THE
DOOR FOR SOME MOISTURE TO GET BACK INTO THE WESTERN MOUNTAINS,
BUT A LACK OF SIGNIFICANT SUPPORTING STORM SYSTEMS WILL KEEP ANY
SNOWFALL ON THE LIGHTER SIDE FOR THE TIME BEING.
AVIATION /12Z TAFS THROUGH 12Z TUESDAY/
ISSUED AT 409 AM MST MON DEC 29 2025
VFR CONDITIONS THROUGH THE PERIOD, WITH OCCASIONAL HIGH CLOUDS.
OTHERWISE, LIGHT WINDS THROUGH THE PERIOD, WITH GUSTY WINDS 15 TO 20
KNOTS AT KRKS AND 25 TO 30 KNOTS AT KCPR THIS AFTERNOON.
PLEASE SEE THE AVIATION WEATHER CENTER AND/OR CWSU ZDV AND ZLC FOR
THE LATEST INFORMATION ON ICING AND TURBULENCE FORECASTS.
RIW WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION...STRAUB
AVIATION...WITTMANN
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page