631
FXUS65 KGGW 260821
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
ISSUED BY NATIONAL WEATHER SERVICE BILLINGS MT
221 AM MDT MON MAY 26 2025
DISCUSSION
KEY MESSAGES:
- GENERALLY DRY AND WARMER CONDITIONS MOST OF THE TIME THIS WEEK.
- GUSTY SE WINDS EXPECTED TODAY.
- TEMPERATURES WILL CONTINUE TRENDING WARMER THIS WEEK.
WEATHER PATTERN OVERVIEW:
ELONGATED UPPER TROUGH WEAKEN ACROSS THE REGION TODAY WILL RECONFIGURE
ITSELF INTO A CLOSED UPPER OVER NORTH DAKOTA BY TUESDAY MORNING. MEANWHILE,
A NARROW UPPER RIDGE WILL MOVE EAST FROM THE NORTHERN ROCKIES. THIS
WILL LEAD TO A GENERAL WARMING TREND ACROSS EASTERN MONTANA THIS WEEK.
HIGH PRESSURE OVER THE DAKOTAS AND PRESSURE FALLS ALONG THE FRONT
RANGE TODAY WILL BRING A TIGHTER SURFACE GRADIENT OVER EASTERN
MONTANA. SE WILL BE BORDERLINE FOR A LAKE WIND ADVISORY ACROSS
FORT PECK LAKE. WITH WAVES EXPECTED TO BE AROUND 3 FEET IN THE
FORT PECK AND DUCK CREEK AREAS AND TODAY BEING MEMORIAL DAY, WILL
ISSUE A LAKE WIND ADVISORY FROM 9 AM TO 9 PM TODAY.
WHILE IT WILL BE DRY MOST OF THE TIME THIS WEEK, A SHORTWAVE
PUSHING THROUGH THE RIDGE ON TUESDAY COULD PRODUCE A FEW SHOWERS,
MAINLY ACROSS THE WESTERN ZONES. THE RIDGE REBOUNDS ON WEDNESDAY
OVER MONTANA AND THE CANADIAN PRAIRIES.
A SHORTWAVE TROUGH FLATTENS THE RIDGE ON FRIDAY AND COULD BRING A
SLIGHT CHANCE OF SHOWERS TO THE REGION. RIDGE REBOUNDS ON SATURDAY WITH
WARM AND DRY WEATHER.
FORECAST CONFIDENCE AND DEVIATIONS:
INCREASED SE WINDS A FEW KNOTS TODAY GIVEN THE NBM TENDENCY TO
UNDER FORECAST WINDS. NO OTHER CHANCES TO FORECAST. HIGH
CONFIDENCE ON WARMING TEMPERATURES THIS WEEK. LOW CONFIDENCE ON
ANY PRECIPITATION CHANCES.
FORRESTER
AVIATION
LAST UPDATE: 0715Z
FLIGHT CAT RANGE: VFR, BRIEF MVFR AT TIMES TODAY AROUND KGDV.
DISCUSSION: VFR CLOUDS WILL REMAIN OVER THE AREA MOST OF THE TIME
TODAY AND TONIGHT BUT LOW CLOUDS OVER SE MONTANA COULD GIVE KGDV
MVFR CEILINGS AT TIMES TODAY.
SE WINDS WILL INCREASE TO 10 TO 20 KNOTS TODAY AND REMAIN THERE THIS
EVENING. SE WILL DIMINISH TO 5 TO 10 KNOTS LATE TONIGHT.
FORRESTER
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY FROM 9 AM THIS MORNING TO 9 PM MDT THIS
EVENING FOR CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN
VALLEY-GARFIELD-MCCONE-PETROLEUM.
WEATHER.GOV/GLASGOW
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