082
FXUS65 KGGW 261126
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
426 AM MST FRI DEC 26 2025
DISCUSSION
KEY MESSAGES:
- PATCHY DENSE FOG WILL LINGER OVER THE REGION THIS MORNING.
- AREAS OF FREEZING RAIN ARE POSSIBLE THIS AFTERNOON THROUGH
SATURDAY MORNING BEFORE SHIFTING TO SNOW SATURDAY AFTERNOON.
- DANGEROUS COLD WIND CHILLS AS LOW AS 35 BELOW ARE POSSIBLE BY
SUNDAY MORNING, ESPECIALLY ALONG AND NORTH OF HIGHWAY 2.
WEATHER PATTERN OVERVIEW:
UPPER TROUGH MOVING INTO THE PACIFIC NORTHWEST THIS MORNING, WITH
WARM AIR CONTINUING TO STREAM ACROSS THE DIVIDE. COLD AIR LINGERS
IN THE NORTHEAST CORNER OF THE STATE, CREATING A VERY SHALLOW
INVERSION, WITH TRAPPED MOISTURE PRODUCING FREEZING FOG.
VISIBILITY HAS IMPROVED ACROSS MUCH OF THE REGION WITH THE INFLUX
OF HIGHER CLOUDS, ALTHOUGH VISIBILITY CONTINUES TO SHIFT UP AND
DOWN. SINCE THERE IS LITTLE DENSE FOG REMAINING, WENT AHEAD AND
CANCELLED THE DENSE FOG ADVISORY FOR THIS MORNING.
AS THE UPPER TROUGH CONTINUES TOWARD THE NORTHERN ROCKIES, LEE LOW
BEGINS TO DETACH FROM THE FRONT RANGE AND MOVE EAST. SCATTERED
SHOWERS ARE EXPECTED, AND ACROSS THE NORTH, WHERE INVERSION
PERSISTS, FREEZING RAIN IS A POSSIBILITY. COLD FRONT FOLLOWS THE
LOW TONIGHT, WITH TEMPERATURES BEGINNING A FREE FALL TO BELOW ZERO
BY SATURDAY NIGHT. PRECIPITATION WILL CHANGE OVER TO SNOW, AND
WINDS WILL BE INCREASING WITH STRONG COLD AIR ADVECTION AND
PRESSURE RISES.
CANADIAN/ARCTIC HIGH MOVING ACROSS THE REGION ON SUNDAY, WILL KEEP
TEMPERATURES WELL BELOW NORMAL, AND A COLD ADVISORY MAY BE LIKELY.
RIDGE REBOUNDS QUICKLY TO THE WEST AND A CHINOOK DEVELOPS, PUSHING
TEMPERATURES BACK TOWARD NORMAL FOR NEXT WEEK.
FORECAST CONFIDENCE & DEVIATIONS:
POPS AND VISIBILITY WERE ADJUSTED NEAR TERM TO REFLECT OBSERVATIONS,
OTHERWISE NBM LARGELY CAPTURED EXPECTED CONDITIONS. CONFIDENCE IS
MORE MODERATE ON THE SYSTEM FOR FRIDAY INTO SATURDAY, MAINLY DUE
TO PRECIPITATION TYPE, LOCATION, AND AMOUNT, AND TIMING+ ISSUES
THAT NEED TO BE RESOLVED.
CONFIDENCE IS ALSO GROWING ON THE NEXT COLD AIR MASS FOR THE
WEEKEND WITH WIND CHILL CONCERNS ON SUNDAY MORNING.
AVIATION
VFR WITH AREAS AS LOW AS LIFR WITH PATCHY DENSE FREEZING FOG OVER
THE TAF SITES MAINLY THIS MORNING.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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