484
FXUS65 KGGW 150520
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1120 PM MDT TUE APR 14 2026
KEY MESSAGES
- BELOW NORMAL TEMPERATURES THURSDAY AND FRIDAY WITH GUSTY NW
WINDS.
- RAIN TONIGHT WITH RAIN CHANGING TO SNOW ON THURSDAY.
DISCUSSION
WEATHER PATTERN OVERVIEW:
SURFACE LOW PRESSURE OVER THE SOUTHERN PRAIRIE PROVINCES WILL
REMAIN TO OUR NORTH THROUGH THIS MORNING. AN UPPER TROUGH DROPPING
INTO THE PACIFIC NORTHWEST WILL HELP TO REDEVELOP THE SURFACE LOW
OVER CENTRAL MONTANA TODAY. THIS LOW WILL TRACK ACROSS EASTERN
MONTANA TONIGHT WITH A COLD FRONT WHICH WILL ALLOW COLDER AIR TO
DROP INTO MONTANA WHILE A MOISTURE STREAM PUNCHES NORTHEAST
THROUGH MONTANA.
RAINFALL IS EXPECTED TO BEGIN OVER THE WESTERN ZONES THIS
EVENING AND SPREAD EAST OVERNIGHT. COLDER AIR WILL CHANGE THE RAIN
TO SNOW OVER THE NW ZONES THURSDAY MORNING, THE NE ZONES THURSDAY
AFTERNOON, AND REMAINDER OF THE FORECAST AREA THURSDAY EVENING
BEFORE THE PRECIPITATION ENDS THURSDAY NIGHT.
THE DETERMINISTIC MODELS WERE WETTER WITH THIS LATEST RUN AND THUS
SLIGHTLY HIGHER SNOW TOTALS. ADVISORY SNOWFALL IS POSSIBLE ACROSS
MOST OF PHILLIPS, NORTHERN VALLEY AND DANIELS COUNTIES.
SYSTEM MOVES OUT THURSDAY NIGHT WITH QPF FOOTPRINTS OVER SOUTHERN
SASK AND SE MONTANA. TEMPS THURSDAY NIGHT DROP INTO THE TEENS
NORTH, LOW 20S SOUTH, ABOUT 15 DEGREES BELOW NORMAL.
SURFACE HIGH WILL LOCK IN THE COLD OVER THE AREA FRIDAY WITH HIGH
TEMPS ONLY REACHING THE 30S TO LOW 40S, POSSIBLY ONLY UPPER 20S
NEAR SPOTS ALONG THE CANADIAN BORDER.
SURFACE HIGH DROPS TO OUR SOUTH WHILE UPPER RIDGE MOVES IN FOR
SATURDAY. TEMPS SHOULD REBOUND INTO THE 40S EAST TO THE 50S WEST
(FOR HIGHS). THE WARMING TREND CONTINUES INTO SUNDAY WITH HIGHS
MAINLY IN THE 60S.
FORECAST CONFIDENCE & DEVIATIONS:
NBM DEVIATIONS INCLUDE:
- INCREASED WINDS THURSDAY AND THURSDAY EVENING
- LOWERED TEMPS THURSDAY
AVIATION
LAST UPDATE: 0430Z
FLIGHT CAT RANGE: VFR TODAY, VFR AND MVFR TONIGHT.
DISCUSSION: SCATTERED VFR CLOUDS EARLY THIS MORNING WITH
INCREASING MID AND HIGH CLOUDS DURING THE DAY.
THE NEXT SYSTEM MOVES IN TONIGHT WITH LOW CLOUDS. KGGW AND KOLF
WILL HAVE RAIN WITH CEILINGS LOWERING TO MVFR LEVELS LATE TONIGHT.
KSDY AND KGDV WILL REMAIN VFR TONIGHT WITH CHANCES FOR LIGHT RAIN
WITH MVFR CEILINGS EXPECTED AFTER 12Z THURSDAY.
WINDS: WEST, SW OR SOUTH 5 TO 10 KNOTS EARLY THIS MORNING BECOMING
WEST TO SW THIS MORNING AND INCREASING TO 10 TO 15 KNOTS THIS
AFTERNOON. WINDS WILL BECOME VARIABLE THIS EVENING AND NORTH TO NW 5
TO 15 KNOTS OVERNIGHT.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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