382
FXUS65 KGGW 231201
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
501 AM MST TUE DEC 23 2025
DISCUSSION
KEY MESSAGES:
- A WINTRY MIX INCLUDING FREEZING RAIN POSSIBLE ON CHRISTMAS DAY.
- ANOTHER ROUND OF MIXED PRECIPITATION POSSIBLE FRIDAY AFTERNOON
INTO SATURDAY MORNING.
WEATHER PATTERN OVERVIEW:
A BROAD RIDGE ACROSS THE CONUS IS EXPECTED TO BECOME MORE
AMPLIFIED THROUGH THE WEEK, WITH THE EAST PACIFIC TROUGH DIGGING
SOUTHWARD ALONG WITH THE GULF OF ALASKA LOW. THIS WILL LEAD TO A
SLOW INCREASE IN THE MOISTURE STREAMING INTO MONTANA AS THE
ATMOSPHERIC RIVER PUSHING INTO SOUTHERN CALIFORNIA SPREADS ACROSS
THE GREAT BASIN.
WITH THE WEAK WINTER THERMAL BOUNDARY OVER CENTRAL MONTANA, AS
SLIGHT RIPPLES OCCUR IN THE FLOW AND MOISTURE INCREASES,
OVERRUNNING PRECIPITATION IS POSSIBLE. THERMAL PROFILES WITH WARM
AIR ALOFT AND COLDER BOUNDARY LAYER WILL CREATE CONDITIONS FOR
FREEZING RAIN OVER MAINLY THE CENTRAL PART OF THE CWA FROM ANY
PRECIPITATION THAT OCCURS, INTERMITTENTLY FROM WEDNESDAY NIGHT
THROUGH SATURDAY MORNING.
A STRONGER SHORTWAVE PUSHES THROUGH THE RIDGE ON FRIDAY NIGHT FOR
POTENTIALLY THE BEST CHANCE FOR PRECIPITATION ALONG WITH GUSTY
WINDS AND DROPPING TEMPERATURES. AN ARCTIC HIGH SLIDES THROUGH THE
NORTHERN PLAINS ON SUNDAY, WITH RIDGE REBOUNDING QUICKLY.
FORECAST CONFIDENCE & DEVIATIONS:
INCREASED POPS SLIGHTLY FOR TONIGHT OTHERWISE LEFT NBM.
MODERATE TO HIGH CONFIDENCE FOR WIDESPREAD FREEZING RAIN ON
THURSDAY, WITH LOWER CONFIDENCE FOR THE QPF AMOUNT.
AVIATION
MOSTLY VFR AS MID LEVEL CLOUDS CONTINUE TO STREAM ACROSS THE
REGION.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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