819
FXUS65 KGGW 170420
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1020 PM MDT THU APR 16 2026
KEY MESSAGES
- NORTHWEST WINDS MAY GET GUSTY AT TIMES AGAIN ON FRIDAY,
ESPECIALLY NEAR THE MT/ND BORDER.
- WARMER AND DRIER WEATHER CONDITIONS LOOK TO RESUME FOR THE
WEEKEND INTO EARLY NEXT WEEK.
- EARLY INDICATIONS SUGGEST A MORE ACTIVE AND WETTER WEATHER
PATTERN MAY EMERGE FOR THE SECOND HALF OF NEXT WEEK.
DISCUSSION
WEATHER PATTERN OVERVIEW:
LOOK FOR LINGERING CLOUDS AND ISOLATED SNOW SHOWERS TONIGHT AND
FRIDAY AS AN UPPER TROUGH SLIDES EAST OF THE REGION. THIS WILL
LEAD TO COLD MORNING TEMPERATURES IN THE TEENS AND LOW 20S BY
FRIDAY MORNING. MEANWHILE, NW WINDS ARE EXPECTED TO INCREASE AGAIN
ON FRIDAY, BUT FOCUSING ESPECIALLY A BIT EAST NEAR THE MT/ND
BORDER CLOSER TO THE DEPARTING TROUGH.
COLDER TEMPERATURES WILL LINGER INTO SATURDAY MORNING BEFORE
ENSEMBLES SHOW RISING 500MB HEIGHTS OVER THE REGION OVER THE
WEEKEND AND EARLY NEXT WEEK WITH A BUILDING RIDGE PATTERN. THE
OVERALL LARGE SCALE SUBSIDENCE WILL LEAD TO DRY WEATHER CONDITIONS
AND AN EMERGING WARMER TEMPERATURE REGIME. HIGHS BY TUESDAY
ACROSS NE MONTANA MAY PUSH INTO THE 70S OR EVEN 80S.
EARLY INDICATIONS SUGGEST THAT WHILE THIS RIDGE AXIS SLIDES
DOWNSTREAM BY THE MIDDLE OF NEXT WEEK, DIFFLUENT SOUTHWEST UPPER
FLOW MAY SET UP OVER THE NORTHERN HIGH PLAINS WITH THE NEXT
APPROACHING LOW PRESSURE SYSTEM. THIS COULD SET THE STAGE FOR A
MORE ACTIVE WEATHER PATTERN UNFOLDING FOR THE MIDDLE OR SECOND
HALF OF NEXT WEEK.
FORECAST CONFIDENCE & DEVIATIONS:
NBM WAS LARGELY FOLLOWED FOR THE FORECAST CYCLE GIVEN THE LOW
IMPACT SNOW SHOWERS TONIGHT AND OVERALL QUIET WEATHER UNFOLDING
FOR THE WEEKEND AND INTO EARLY NEXT WEEK. WHILE IT HANDLED TRENDS
WELL, IT MAY PROVE CONSERVATIVE ON THE BACKSIDE OF THE UPPER RIDGE
FOR TUESDAY. THE ONLY REAL TWEAK WAS TO NUDGE WINDS A BIT HIGHER
FOR FRIDAY GIVEN THE GUSTY NW WINDS EXPECTED, THOUGH THE STRONGEST
WINDS WILL BE CONCENTRATED MORE TO THE EAST THAN ON THURSDAY.
CONFIDENCE IS ALSO GROWING THAT WE MAY SEE A MORE ACTIVE WEATHER
PATTERN TOWARD THE MIDDLE OF NEXT WEEK, THOUGH UNCERTAINTIES
REMAIN AT LARGER TIME SCALES AND THE TIMING OF THE DEPARTING RIDGE
AS WELL AS FINER DETAILS.
AVIATION
LAST UPDATE: SATURDAY APRIL 17, 2026 AT 0415Z.
FLIGHT CAT RANGE: A RANGE OF MVFR TO VFR.
DISCUSSION: CEILINGS WILL FLUCTUATE FROM VFR TO MVFR AT TIMES
WHILE STRATUS PUSHES THROUGH THE REGION TONIGHT INTO FRIDAY. VERY
ISOLATED SNOW SHOWERS MAY TEMPORARILY BRING DOWN VISIBILITIES AS
WELL. THAT SAID, COVERAGE FOR SNOW SHOWERS WILL BE LOW.
WIND: NORTHWEST AT 5 TO 15 KTS OVERALL, THOUGH AT TIMES BECOMING
LIGHT AND VARIABLE NEAR KGGW AND KOLF. NORTHWEST WINDS WILL RESUME
AND INCREASE ON FRIDAY, RANGING FROM 10 TO 20 KTS WITH OCCASIONAL
STRONGER GUSTS.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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