101
FXUS65 KGGW 132145
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
345 PM MDT SAT SEP 13 2025
DISCUSSION
KEY MESSAGES:
1) THUNDERSTORM CHANCES TO CONTINUE THIS EVENING, A FEW MAY
PRODUCE HEAVY RAINFALL.
2) THE NEXT SIGNIFICANT CHANCE FOR RAINFALL WITH SHOWERS AND
THUNDERSTORMS CONTINUES TO TAKE SHAPE ON TUESDAY.
3) OVERALL EXPECT TEMPERATURES NEAR SEASONABLE NORMALS THIS
UPCOMING WEEK.
WEATHER PATTERN OVERVIEW:
UPPER TROUGH PATTERN IN PLACE WILL MAINTAIN THUNDERSTORMS THROUGH
AT LEAST THIS EVENING. LOCALLY HEAVY RAINFALL REMAINS POSSIBLE
WITH SOME TRAINING AND SLOW MOTION OF THE STORMS. THE TROUGH
PUSHES EAST ENOUGH FOR SUNDAY THAT ASIDE FROM ISOLATED COVERAGE
MOST OF NE MONTANA WILL REMAIN DRY.
THE NEXT PACIFIC TROUGH WILL ENTER THE SCENE ACROSS THE NORTHERN
ROCKIES, AND MERGE WITH THE LINGERING LOW OVER NORTH DAKOTA. THIS
WILL LEND SUPPORT TO THE NEXT ROUND OF SHOWERS AND THUNDERSTORMS.
ASIDE FROM PRECIPITATION CHANCES, FORECAST TEMPERATURES ARE TO
REMAIN NEAR SEASONABLE AVERAGES THROUGH THE WEEK.
FORECAST CONFIDENCE & DEVIATIONS:
NBM POPULATED MOST OF THE FORECAST JUST FINE WITH A FEW TWEAKS FOR
CONSISTENCY AND COLLABORATION. CONFIDENCE REMAINS HIGH ON
SEASONABLE TEMPERATURES FOR THE WEEK AHEAD WITH PRECIPITATION
CHANCES AT TIMES. CONFIDENCE IS MORE MODERATE ON TIMING AND
PRECIPITATION AMOUNT FOR A GIVEN LOCATION GIVEN THE NATURE OF
CONVECTION.
AVIATION
LAST UPDATE: 2130Z ON 9/13/2025
FLIGHT CAT RANGE: MOSTLY VFR, SOME MVFR.
DISCUSSION: ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL
CONTINUE THROUGH THIS EVENING BEFORE DIMINISHING. LOW CEILINGS AND
VISIBILITIES ARE POSSIBLE WITH THE STORMS.
WIND: GENERALLY LIGHT AND VARIABLE THROUGH THE CYCLE. BECOMING
ERRATIC AND GUSTY NEAR THE STRONGER STORMS.
EQUIPMENT: NOTAM COMMS ISSUES WITH THE KSDY OBSERVATION REMAIN.
AMD NOT SKED WILL REMAIN IN PLACE UNTIL METARS ARE AVAILABLE.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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