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FXUS63 KUNR 300450
AFDUNR
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
950 PM MST MON DEC 29 2025
KEY MESSAGES
-SEASONALLY MILD MOST OF THE WEEK MOST AREAS, WITH DRY WEATHER
DISCUSSION
(THIS EVENING THROUGH MONDAY)
ISSUED AT 1229 PM MST MON DEC 29 2025
WESTERN CONUS RIDGE WILL DOMINATE THE WEATHER IN THE PERIOD,
SUPPORTING MILD AND DRY WEATHER MOST OF THE WEEK. THE REGION WILL
REMAIN ON THE NE PERIPHERY OF THE RIDGE, WITH NORTHERN STREAM
IMPULSES SUPPORTING WEAK COOL FRONTS AT TIMES, SPECIFICALLY WED
AND AND AGAIN LATER THURSDAY, WITH SEASONALLY MILD PAC AIR IN
BETWEEN. WAA ONGOING TODAY AS THE RIDGE PUSHES EAST, SUPPORTING
MUCH WARMER CONDS THAN YESTERDAY, ESP THE WESTERN HALF. EVEN
WARMER TOMORROW, WITH 40S AND 50S COMMON, AND A FEW 50S DOWNWIND
OF THE BH. BAROCLINIC ZONE WILL FLUCTUATE OVER THE REGION THIS
WEEK WITH SEVERAL WEAK IMPULSES TRAVERSING THE NORTH SIDE OF THE
RIDGE. MOST OF THE AREA WILL REMAIN ON THE WARM SIDE OF THE RIDGE
WITH SEASONALLY MILD CONDS AND BREEZY WINDS AT TIMES PER PAC
FLOW. IT IS QUITE POSSIBLE THAT ONE OF THESE IMPULSE COMES IN A
LITTLE STRONGER (NAMELY WEDNESDAY), WHICH COULD BRING MUCH COOLER
WEATHER TO THE NORTHEAST HALF THAN WHAT IS CURRENTLY ADVERTISED.
OTHERWISE, DRY WEATHER CAN BE EXPECTED.
AVIATION
(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT)
ISSUED AT 950 PM MST MON DEC 29 2025
VFR CONDITIONS ARE EXPECTED THROUGH THE PERIOD.
UNR WATCHES/WARNINGS/ADVISORIES
SD...NONE.
WY...NONE.
DISCUSSION/KEY MESSAGES...JC
AVIATION...13
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