315
FXUS65 KRIW 191024
AFDRIW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
324 AM MST THU FEB 19 2026
KEY MESSAGES
- LIGHT SNOW WILL CONTINUE EAST OF THE DIVIDE AND ACROSS THE WESTERN
MOUNTAINS THROUGH THIS MORNING. ADDITIONAL ACCUMULATIONS ARE
EXPECTED TO BE MINOR AFTER SUNRISE.
- MUCH COLDER TEMPERATURES ARE EXPECTED THROUGH FRIDAY, WITH LOWS
DROPPING TO AROUND OR BELOW ZERO FOR MOST LOCATIONS.
- FRIDAY BRINGS CHANCES FOR LIGHT SNOW ACROSS SOUTHERN WYOMING
(20-30%) AND WESTERN WYOMING (30-50%).
- AFTER A DRY WEEKEND WITH MODERATING TEMPERATURES, THE NEXT
SYSTEM IS FAVORED TO ARRIVE EARLY NEXT WEEK. THIS WILL RETURN
SNOW CHANCES TO WESTERN WYOMING.
DISCUSSION
ISSUED AT 321 AM MST THU FEB 19 2026
WE ARE NOW ON THE BACK HALF OF THE SYSTEM THAT HAS (FINALLY) BROUGHT
WIDESPREAD SNOW TO WYOMING. RADAR, SATELLITE, AND WEBCAM IMAGERY
SHOW SNOW IS NOW MOSTLY FOCUSED EAST OF THE CONTINENTAL DIVIDE AS
THE SYSTEM BEGINS TO PULL AWAY. OBSERVED WINDS CURRENTLY SHOW A
SURFACE CIRCULATION CENTERED ACROSS FREMONT AND NATRONA COUNTIES;
THESE AREAS WILL BE MOST FAVORED TO SEE ANOTHER INCH OR TWO OF SNOW
THROUGH SUNRISE, ESPECIALLY ACROSS THE UPSLOPE-FAVORED CASPER AREA.
SNOW WILL LINGER THROUGH THE REST OF THE MORNING THOUGH WILL
DECREASE AFTER SUNRISE. A TRAILING SHORTWAVE WILL ALSO KEEP
LIGHT SNOW GOING ACROSS THE MOUNTAINS OF WESTERN WYOMING, THOUGH
MOISTURE IS LIMITED AND ADDITIONAL ACCUMULATION IS EXPECTED TO
BE MINOR.
MUCH COLDER TEMPERATURES ARE EXPECTED TODAY BEHIND THE SYSTEM, WITH
HIGHS PEAKING IN THE TEENS AND 20S. LOWS WILL DROP TO AROUND OR
BELOW ZERO FOR MOST OF THE AREA TONIGHT, THOUGH THERE IS SOME
UNCERTAINTY ON CLOUD COVER WHICH COULD LEAD TO LARGE TEMPERATURE
FLUCTUATIONS IN EITHER DIRECTION. GIVEN THE FRESH SNOW FOR
MOST, OVERNIGHT TEMPERATURES MAY NEED TO BE LOWERED A LITTLE
MORE IF CLOUD COVERAGE DECREASES FURTHER. SOUTHERN WYOMING WILL
SEE JUST ENOUGH OF A CLOUD INCREASE FROM A SYSTEM PASSING OVER
THE FOUR CORNERS AREA TO STAY ABOUT 10 DEGREES WARMER. THIS WILL
BRING A LOW CHANCE (20-30%) OF A QUICK ROUND OF SNOW TO
SOUTHERN LINCOLN COUNTY AND SWEETWATER COUNTY FRIDAY, THOUGH
MOISTURE IS LIMITED AND MOST OF THE SNOW IS EXPECTED TO REMAIN
IN COLORADO. STILL, A NORTHERN SHIFT IN THE PASSING SYSTEM COULD
LEAD TO SOME TRAVEL IMPACTS ALONG THE I- 80 CORRIDOR FRIDAY.
SEPARATELY, ANOTHER SHORTWAVE AND MODEST MOISTURE ADVECTION WILL
BRING A QUICK ROUND OF SNOW TO THE WESTERN WYOMING MOUNTAINS FRIDAY
AFTERNOON AND EVENING. CURRENTLY, FORECAST ACCUMULATIONS WITH THIS
FEATURE ARE EXPECTED TO REMAIN LIGHT, GENERALLY ONLY AN INCH OR TWO.
TEMPERATURES WILL MODERATE THROUGH THE WEEKEND WITH NO ADDITIONAL
PRECIPITATION AS RIDGING RETURNS. THIS WILL BEGIN TO BREAK DOWN
EARLY NEXT WEEK AS THE NEXT SYSTEM APPROACHES. AS IT STANDS NOW,
THIS WOULD BE FOCUSED ON WESTERN WYOMING BEGINNING IN THE MONDAY
NIGHT THROUGH TUESDAY TIMEFRAME WITH THE ARRIVAL OF PACIFIC MOISTURE
WITHIN SOUTHWESTERLY LOW-LEVEL FLOW. LREF PRECIPITABLE WATER VALUES
ARE CURRENTLY FORECAST TO PEAK AROUND THE 95TH PERCENTILE ACROSS
WESTERN WYOMING, POTENTIALLY CONTRIBUTING TO A MORE SIGNIFICANT SNOW
EVENT. CONFIDENCE FOR PRECIPITATION FARTHER EAST IS LOWER.
REGARDLESS, AFTER A QUICK REPRIEVE THIS WEEKEND, GUIDANCE FAVORS A
RETURN TO A MORE ACTIVE PATTERN THROUGH NEXT WEEK.
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/
ISSUED AT 930 PM MST WED FEB 18 2026
WEST OF THE DIVIDE...KBPI/KJAC/KPNA/KRKS TERMINALS.
SNOW HAS TAPERED OFF WITH SOME LIGHT SNOW LINGERING AROUND
JAC/RKS. VFR CONDITIONS EXPECTED STILL WITH LOW CEILINGS FOR
MUCH OF THE PERIOD BEFORE LIFTING TO THE MID LEVELS BY 00Z
THURSDAY EVENING. WINDS ARE ON THE DECLINE OVERNIGHT FOR ALL BUT
RKS, THAT WILL SEE 25KT GUSTS THROUGH MUCH OF THE NIGHT AND DAY
THURSDAY BEFORE DIMINISHING TOWARDS SUNSET AROUND 00Z. ALL
OTHER TAF SITES EXPECTED TO BE 10KTS OR LESS. LOW STRATUS/FOG
POSSIBLE INTO THE NEXT TAF CYCLE FOR FRIDAY MORNING WITH THE
RECENT SNOWFALL.
EAST OF THE DIVIDE...KCOD/KCPR/KLND/KRIW/KWRL TERMINALS.
SNOW CONTINUES FOR ALL LOCATIONS WITH MVFR TO IFR CONDITIONS.
THIS IS EXPECTED TO PUSH THROUGH EARLY THURSDAY MORNING BEFORE
TAPERING OFF BY 12-14Z, LINGERING A BIT LATER AT CPR AROUND
15Z. OTHERWISE, WINDS REMAIN GUSTY UP TO 25KTS AT ALL LOCATIONS
BUT WILL BE DIMINISHING BY EARLY MORNING AROUND THAT SAME 12-14Z
TIME FRAME AS THE SNOW TAPERS OFF. LOW BUT VFR CONDITIONS FOR
THE REMAINDER OF THE PERIOD NOT LIFTING TO THE MID LEVELS UNTIL
AFTER 00Z THURSDAY EVENING. AGAIN, FOG/LOW STRATUS POSSIBLE COME
FRIDAY MORNING WITH THE RECENT SNOWFALL INTO THE NEXT TAF
CYCLE.
PLEASE SEE THE AVIATION WEATHER CENTER AND/OR CWSU ZLC AND ZDV FOR THE
LATEST INFORMATION ON ICING AND TURBULENCE FORECASTS.
RIW WATCHES/WARNINGS/ADVISORIES
WINTER WEATHER ADVISORY UNTIL 11 AM MST THIS MORNING FOR
WYZ003>010-017>019-022.
WINTER STORM WARNING UNTIL 11 AM MST THIS MORNING FOR WYZ011-
020.
DISCUSSION...MYERS
AVIATION...LOWE
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