405
FXUS65 KCYS 082332
AFDCYS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
432 PM MST THU JAN 8 2026
KEY MESSAGES
- CHANCES OF MOSTLY LIGHT SNOW CONTINUE THROUGH FRIDAY MORNING
IN A POST-FRONTAL ENVIRONMENT.
- SEASONABLY COLD TEMPERATURES THROUGH FRIDAY, WITH TEMPERATURES
BACK TO NEAR NORMAL ON SATURDAY.
- WARMER TEMPERATURES AND MOSTLY BENIGN CONDITIONS EXPECTED
SUNDAY THROUGH MIDDLE OF NEXT WEEK.
SHORT TERM /THROUGH FRIDAY NIGHT/
ISSUED AT 230 PM MST THU JAN 8 2026
COLD AIR CONTINUES TO MOVE INTO THE CWA THIS AFTERNOON AND EVEN
DAYTIME HEATING CAN'T FULLY STAVE OFF ONE OF THE COOLER
AIR MASSES WE'VE SEEN THIS WINTER. WIDESPREAD TEMPERATURES ARE
STRUGGLING TO MAKE IT OUT OF THE 30'S WITH ONLY A FEW LOCATIONS
IN OUR EASTERN ZONES ABLE TO REACH 40 DEGREES AS OF THIS
WRITING. WE SHOULD SEE TEMPERATURES PLUMMET TONIGHT WITH
WIDESPREAD LOWS INTO THE TEENS AND LOW 20'S WITH CLOUD COVER
HELPING TO INSULATE MOST OF THE REGION FROM GOING EVEN COLDER.
MEANWHILE A FEW MORE SNOW SHOWERS WILL BE POSSIBLE IN THE POST
FRONTAL ENVIRONMENT AS THE TROUGH CONTINUES TO MOVE EASTWARDS
AWAY FROM THE REGION. HIGH RESOLUTION GUIDANCE INDICATES A FEW
MORE BANDS SHOULD SET UP THROUGH THE NIGHTTIME HOURS, WITH
MULTIPLE SOLUTIONS INCLUDING BOTH HIGH RESOLUTION AND ENSEMBLE
GUIDANCE INDICATING WE SHOULD SEE A DECENT BAND SET UP ACROSS
LARAMIE COUNTY THIS EVENING INTO THE NIGHTTIME HOURS. WHILE
STILL NOT A HEAVY AMOUNT OF SNOW BY ANY MEANS, AREAS AROUND THE
I-80 CORRIDOR THROUGH CHEYENNE COULD SEE AROUND 0.5-2 INCHES,
AND THIS IS REFLECTED IN THE MOST RECENT FORECAST UPDATE.
MEANWHILE OUTSIDE OF OUR MORE POPULATED AREAS, PORTIONS OF OUR
NORTHERN AND WESTERN ZONES SHOULD SEE ANOTHER 1-2 INCHES
POSSIBLE AS THE TROUGH AXIS SLOWLY PRESSES EASTWARDS THROUGH THE
REGION, WITH MUCH OF THIS ACTIVITY AIDED BY OROGRAPHIC
ENHANCEMENT BEFORE SNOW CHANCES DISSIPATE BY LATE TOMORROW
MORNING.
FRIDAY WILL BE AN OVERALL COOLER DAY THAN TODAY IN THE POST-
FRONTAL ENVIRONMENT, WITH WIDESPREAD HIGHS AROUND FREEZING, AS
THE NEBRASKA PANHANDLE SHOULD SEE TEMPERATURES PEAK IN THE MID
TO UPPER 30'S, WHILE MOST OF OUR WYOMING ZONES SHOULD ONLY REACH
THE 20'S TO MID 30'S OUTSIDE OF THE MOUNTAINS. THIS WILL ALSO
TRANSLATE OVER TO OUR LOWS GOING INTO SATURDAY, WITH
TEMPERATURES MOSTLY DOWN INTO THE TEENS UNDER NOW CLEAR SKIES. ONCE
THE SNOW EXITS, MINIMAL SIGNIFICANT WEATHER IMPACTS ARE
EXPECTED OUTSIDE OF OUR COOLER TEMPERATURES, THOUGH A TIGHTENING
PRESSURE GRADIENT COULD CAUSE SOME BREEZY WINDS, BUT THE
STRONGEST ARE NOT EXPECTED UNTIL SATURDAY.
LONG TERM /SATURDAY THROUGH THURSDAY/
ISSUED AT 230 PM MST THU JAN 8 2026
THE LONG TERM WILL BE CHARACTERIZED AS MOSTLY BENIGN. DRY AND ABOVE
AVERAGE TEMPERATURES ARE SET TO RETURN BY SUNDAY AND PERSIST THROUGH
THE FORECAST PERIOD. THE ONLY DAY OF INTEREST WILL BE SATURDAY WITH
ANOTHER ROUND OF BREEZY TO WINDY CONDITIONS ACROSS THE RANGES AND
THE FOOTHILLS.
SATURDAY MODELS SHOW THE UPPER LEVEL RIDGE TO BE PUSHING IN OVER THE
PACNW WITH THE LEADING EDGE BRINGING NORTHWEST FLOW ALOFT. MODELS
SHOW A WEAK UPPER LEVEL 700 MB JET SETTING UP OVER THE LARAMIE RANGE
WITH 41-48 KTS AND NEGATIVE OMEGA SIGNALING DOWNSLOPING. WINDS WILL
NOT BE A STRONG AS DAYS PASSED, BUT THERE IS ENOUGH FORCING THAT THE
WINDS AT THE SURFACE WILL SEE AN INCREASE. 70-80% OF THE RAW
ENSEMBLES SHOW WIND GUSTS NEARING 50 MPH ALONG PORTIONS OF THE WITH
THE CHEYENNE RIDGE AND FOOTHILLS OF THE LARAMIE RANGE SEEING 50-70%
PROBABILITIES OF GUSTS TO 50 MPH AS WELL. HOWEVER, CHEYENNE PROPER
LOOKS TO BE OUT OF THE RUNNING FOR WINDS THAT HIGH AND MORE LIKE 80%
PROBABILITIES OF GUSTS OF 35-40 MPH. ELSEWHERE EAST OF LARAMIE RANGE
WILL ALSO SEE 80% PROBABILITIES OF GUSTS TO NEAR 40, WHILE WEST OF
THE RANGE WILL 80% PROBABILITIES OF 25-30 MPH GUSTS.
WITH THE LEADING EDGE OF THE RIDGE OVERHEAD SATURDAY, COOLER
TEMPERATURES WILL CONTINUE TO LINGER. IN-HOUSE GUIDANCE IS SHOWING
EASTERN PORTIONS OF THE CWA SEEING TEMPERATURES 1-2 DEGREES BELOW
NORMAL ALONG THE LOWER ELEVATIONS. HOWEVER, THE HIGHER ELEVATIONS
WILL SEE TEMPERATURES ROUGHLY 15 DEGREES BELOW NORMAL. EAST OF THE
LARAMIE RANGE, TEMPERATURES WILL AVERAGE 4-8 DEGREES ABOVE NORMAL
STILL. 90% OF THE RAW ENSEMBLES SHOW TEMPERATURES SATURDAY TO BE
BELOW 45 DEGREES TO THE EAST OF THE LARAMIE RANGE AND BELOW 35 TO
THE WEST OF THE RANGE. AS WE MOVE INTO SUNDAY, MODELS SHOW THE RIDGE
TO CONTINUE BUILDING INTO THE REGION ALLOWING FOR CONTINUED DRY
CONDITIONS AND SLIGHTLY WARMER TEMPERATURES. IN-HOUSE GUIDANCE AGAIN
SHOWS TEMPERATURES TO BE ABOVE NORMAL WITH MOST LOCATIONS SEEING
UPWARDS OF 10-20 ABOVE NORMAL. THIS WILL CONTINUE TO BE THE CASE
THROUGH THE PERIOD. SUNDAY, 80-90% OF THE RAW ENSEMBLES ARE IN
AGREEMENT THAT THE EASTERN PORTION OF THE CWA WILL SEE TEMPERATURES
BETWEEN 50-55 DEGREES AND THE EAST WILL SEE TEMPERATURES AT OR BELOW
42 DEGREES. MODELS AND ENSEMBLES BOTH SHOW TEMPERATURES TO HOVER
AROUND THE 50S THROUGH THE WEEK ON THE EAST AND BETWEEN 40-45
DEGREES TO THE WEST (70-80% CONFIDENCE).
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
ISSUED AT 432 PM MST THU JAN 8 2026
WINDS ARE EXPECTED TO BE LIGHT THROUGH THE OVERNIGHT PERIOD.
MODELS INDICATE A COUPLE SNOW SHOWERS WILL MOVE OVER MOST THE
TERMINALS BUT IS EXPECTED TO BE DONE BY 10Z. THERE IS NOT ENOUGH
CONFIDENCE ON IF THESE SNOW SHOWERS WILL HAVE ANYTHING REACH
THE GROUND SO VCSH WAS KEPT DURING THE APPROXIMATE TIME THE
SHOWERS ARE SUPPOSE TO ROLL OVER THE TERMINALS. AROUND 15Z THE
WINDS ARE SUPPOSE TO GUSTS BETWEEN 20 TO 25 KTS. CLOUD DECKS ARE
ALSO EXPECTED TO BOUNCE BETWEEN LOW VFR AND POSSIBLY MVFR OVER
KRWL AND KLAR UNTIL 10Z. BUT VFR CONDITIONS LASTING THROUGH THE
TAF PERIOD ARE EXPECTED FOR KCYS AND THE NEBRASKA TERMINALS.
CYS WATCHES/WARNINGS/ADVISORIES
WY...NONE.
NE...NONE.
SHORT TERM...CG
LONG TERM...WFOCYS
AVIATION...MM
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