139
FXUS65 KGGW 211841
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1241 PM MDT SAT MAR 21 2026
KEY MESSAGES
- COOLER TEMPERATURES THIS WEEKEND ACROSS NE MONTANA ALONG WITH
CHANCES FOR LIGHT RAIN SHOWERS TODAY.
- CLOSER TO AVERAGE TEMPERATURES AND ADDITIONAL RAIN CHANCES LATE
TUESDAY INTO WEDNESDAY.
DISCUSSION
WEATHER PATTERN OVERVIEW:
FOLLOWING A COLD FRONT THIS MORNING, WE'RE SEEING A RETURN TO
CLOSER TO AVERAGE, MORE MILD TEMPERATURES FOR THE NEXT FEW DAYS.
HIGHS WILL BE IN THE 40S AND 50S THROUGH TUESDAY WHILE THE UPPER
RIDGING WEAKENS WITH EMBEDDED SHORTWAVES TRACKING THROUGH THE
REGION AND BECOMES MORE ZONAL OVER MONTANA. THESE WILL PROVIDE
ENOUGH FORCING FOR ASCENT FOR SCATTERED RAIN COVERAGE AGAIN BY
ABOUT TUESDAY NIGHT INTO WEDNESDAY. COOLER TEMPERATURES LOOK TO
FOLLOW THE SHORTWAVE ACTION LATE IN THE WEEK AS CONDITIONS DRY
OUT.
FORECAST CONFIDENCE & DEVIATIONS:
BLENDED HRRR FOR DAY 1 WINDS AND 50% NBM90 FOR DAY 1 WIND GUSTS.
INCREASED POPS FOR THIS AFTERNOON FOLLOWING THE INCREASED
SATURATION FROM PRELIMINARY RAINFALL THAT DID NOT REACH THE GROUND.
WILL CAUTION HOWEVER GIVEN THE SPOTTY COVERAGE AND LIGHT NATURE
OF THE PRECIPITATION CHANCES AT TIMES THIS WEEK, CONFIDENCE ON
EXACT LOCATIONS AND AMOUNTS IS BELOW AVERAGE DESPITE AGREEMENT ON
THE SYNOPTIC VIEW.
AVIATION
LAST UPDATE: SATURDAY MARCH 21 AT 1800Z
FLIGHT CATEGORY: VFR - MVFR
DISCUSSION: MID TO LOW LEVEL OVERCAST SKIES WILL STICK AROUND
THROUGH MID DAY TOMORROW. VFR CONDITIONS ARE EXPECTED FOR THE
MOST PART, BUT LOCALIZED MVFR LOW CLOUDS OR VISIBILITY WITH
PASSING RAIN SHOWERS IS POSSIBLE. RAIN SHOWERS ARE LIKELY THROUGH
0Z AND BRIEF SNOW SHOWERS ARE POSSIBLE TONIGHT.
WIND: NORTH TO NORTHWEST WINDS 10 - 20 KTS THROUGH 3Z TOMORROW.
WINDS DECREASE AFTER 6Z AND BEGIN TO SLOWLY VEER WEST THROUGH THE
NIGHT. BY 18Z TOMORROW WINDS BECOME WEST AND INCREASE TO 10 - 15
KTS.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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