773
FXUS65 KGGW 060053
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
ISSUED BY NATIONAL WEATHER SERVICE BILLINGS MT
653 PM MDT MON MAY 5 2025
DISCUSSION
WINDS ACROSS FORT PECK LAKE HAVE DECREASED TO 10 TO 20 MPH, AND
HAVE CANCELLED THE LAKE WIND ADVISORY. REMAINDER OF FORECAST LOOKS
ON TRACK FOR TONIGHT AS A WEAK WAVE LIFTING THRU SOUTHEAST MT
WILL BRING AREAS OF LIGHT RAIN TO MAINLY SOUTHERN PORTIONS OF OUR
FORECAST AREA. UPSTREAM RADAR SHOWS SOME SHOWER ACTIVITY LIFTING
THRU SOUTHEAST MT NOW. GREATEST POTENTIAL FOR MEASURABLE RAIN
(0.10" OR LESS) WILL BE IN THE SOUTHEAST NEAR GLENDIVE, TERRY AND
WIBEAX. LOOK FOR LOW TEMPS IN THE 30S TO LOWER 40S. JKL
KEY MESSAGES:
1) GRADUAL DRYING IS EXPECTED INTO WEDNESDAY. THE SOUTHEAST ZONES
WILL BE THE LAST TO DRY AS A SLIGHT RESURGENCE OF SHOWERS OCCURS
LATE TONIGHT FROM THE SOUTH.
2) WARMER TEMPERATURES RETURN FOR WEDNESDAY AND THURSDAY WITH HOT
CONDITIONS EXPECTED THIS WEEKEND WITH HIGHS POSSIBLY NEAR 90 ON
SUNDAY.
3) WEAK DISTURBANCE COULD BRING SCATTERED SHOWERS & THUNDERSTORMS
THURSDAY NIGHT, MAINLY SOUTH OF THE MISSOURI RIVER.
WEATHER PATTERN OVERVIEW:
THE UPPER PATTERN IS COMPLICATED WITH AN UPPER TROUGH OVER WESTERN
MONTANA WEAKENING OVER THE NEXT COUPLE DAYS. A RAIN BAND OVER THE
CWA EARLY THIS AFTERNOON WILL CONTINUE WEAKENING. SOME RESURGENCE
IS EXPECTED OVER SOUTHEAST MONTANA LATE TONIGHT INTO EARLY
TUESDAY FROM WYOMING.
AN UPPER RIDGE WILL GRADUALLY BUILD OVER THE AREA BUT A WEAK
DISTURBANCE WILL MOVE EAST THROUGH THURSDAY NIGHT THAT BRINGS A
CHANCE OF SHOWERS AND THUNDERSTORMS, MAINLY SOUTH OF THE MISSOURI
RIVER.
THE UPPER RIDGE SURGES NORTH AGAIN OVER THE WEEKEND BEFORE A
PACIFIC TROUGH MOVES IN EARLY NEXT WEEK. THIS WILL BRING TEMPS
BACK INTO THE 80S TO NEAR 90.
FORECAST CONFIDENCE & DEVIATIONS:
GENERALLY WENT WITH NBM ON ALL ELEMENTS, HOWEVER BLENDED IN SOME
NEAR-TERM MODELS WITH POPS THROUGH TONIGHT. TFJ
AVIATION
LAST UPDATED: 0050Z
FLIGHT CAT RANGE: MOSTLY VFR, BUT LOCAL MVFR IS POSSIBLE NEAR
KGDV STARTING ~05Z AND LASTING INTO TUESDAY MORNING.
DISCUSSION: LOW CLOUDS AND SHOWERS REMAIN MOSTLY TO OUR SOUTH
TONIGHT AND TUESDAY, BUT LIGHT RAIN AND SOME LOWER CLOUD COULD
AFFECT SOUTHERN PARTS BEGINNING LATER THIS EVENING. NORTH WINDS
HAVE DECREASED IN THE NORTH/WEST BUT WILL CONTINUE TO GUST 20-30
KNOTS AT KSDY & KGDV THRU MOST OF THE EVENING. EXPECT LIGHTER
EASTERLY WINDS REGIONWIDE ON TUESDAY. JKL
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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