790
FXUS65 KGGW 082050
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
250 PM MDT SUN MAR 8 2026
KEY MESSAGES
- STRONG CHINOOK WINDS EXPECTED THROUGH THIS AFTERNOON. DUSTY
CONDITIONS UNTIL WINDS SETTLE TONIGHT.
- HIGH WIND WARNING THROUGH 9 PM FOR PHILLIPS, 6 PM FOR PETROLEUM,
VALLEY, AND GARFIELD COUNTIES.
- RED FLAG WARNING THROUGH 9 PM FOR PHILLIPS, PETROLEUM, VALLEY,
GARFIELD, MCCONE, RICHLAND, DAWSON, PRAIRIE, WIBAUX COUNTIES.
- A WINTER WEATHER ADVISORY FROM 6 PM TO 6 AM TOMORROW FOR THE
LITTLE ROCKIES.
- UNSETTLED WEATHER PATTERN THROUGH THE WEEK.
DISCUSSION
WEATHER PATTERN OVERVIEW:
SYNOPTIC SETUP: FORECAST BEGINS WITH A WEAK RIDGE OVER THE
NORTHERN PLAINS AND SOUTHERN CANADIAN PRAIRIE PROVINCES EMBEDDED
IN OTHERWISE ZONAL FLOW. THE NOSE OF THIS RIDGE HAS DIPPED OFF
THE FRONT RANGE TO GENERATE A CHINOOK DOWN THE PLAINS THROUGH
TODAY WHICH IS BUTTING UP AGAINST A COLD FRONTAL BOUNDARY AT THE
INTERNATIONAL BORDER.
TONIGHT: AS THE CHINOOK SHUTS OFF THE COLD FRONT WILL ADVANCE
SOUTH GENERATING AN AREA OF LIFT JUST NORTH OF IT WHICH WILL BEGIN
WRINGING OUT RAIN TRANSITIONING TO SNOW ESPECIALLY ACROSS THE FAR
WEST. SNOW TOTALS GOING INTO MONDAY MORNING WILL REACH UPWARD AND
POSSIBLE ABOVE 2 INCHES OVER THE LITTLE ROCKIES DUE TO SOME
UPSLOPE. THEREFORE A WINTER WEATHER ADVISORY FOR SNOW WAS ISSUED.
MONDAY THROUGH WEDNESDAY: COOLER PACIFIC AIRMASS WILL PRESS INTO
THE REGION FOR A COLD START TO MONDAY BUT SHOULD SLOWLY
WARM/MODIFY BY WEDNESDAY. ISOLATED CHANCES FOR RAIN OR SNOW ARE
POSSIBLE TUESDAY AFTERNOON AND EVENING.
WEDNESDAY NIGHT INTO THURSDAY: ANOTHER CHINOOK OVERNIGHT FOLLOWED
BY A COLD FRONT THAT AFTERNOON IS LOOKING LIKELY AND A QUICK
RIDGE/TROUGH COUPLET MOVES THROUGH THE REGION. STRONG WINDS ARE
ALREADY BUILDING THEMSELVES INTO THE FORECAST AND A PERSISTENT
MONITORING FOR POSSIBLE HIGH WINDS ARE TAKING PLACE OVER THESE
TIME PERIODS.
FRIDAY ONWARD: POST COLD FRONT IT LOOKS LIKE A MORE ARCTIC AIRMASS
MOVES IN RATHER THAN PACIFIC AIRMASS. THIS WILL DROP TEMPS CLOSER
TO NORMAL FOR THE AREA THROUGH THE WEEKEND.
FORECAST CONFIDENCE & DEVIATIONS:
BLENDED 75% NBM90 AND HAND EDITS IN AREAS OF EXPECTED STRONG
GUSTING. ADDED WIDESPREAD GUSTS >60 MPH IN PETROLEUM AND VALLEY
COUNTIES AND >55 MPH IN GARFIELD.
CONFIDENCE IS HIGH FOR PLACEMENT AND TOTALS FOR SNOW TONIGHT.
CONFIDENCE IS HIGH FOR ANOTHER RIDGE/TROUGH COUPLET TO CAUSE A
CHINOOK FOLLOWED BY A COLD FRONT MID TO LATE WORK WEEK. THOUGH
CONFIDENCE IS MODERATE TO LOW IN THE EXACT TIMING.
AVIATION
LAST UPDATE: 2000Z
FLIGHT CAT RANGE: VFR - MVFR
DISCUSSION: ISOLATED RAIN AND SNOW SHOWERS IMPACTING THE
TERMINALS AROUND 00-02Z. THIS MAY REDUCE VISIBILITY BRIEFLY BUT
CURRENTLY IS NOT EXPECTED TO DROP BELOW MVFR. ALL SNOW SHOULD
CLEAR FROM THE TERMINALS BY MONDAY EVENING IF NOT EARLIER.
WIND: W AT 30 - 40 WITH GUSTS UP TO 55 KTS THROUGH 0Z. THROUGH
THE NIGHT WINDS SLOWLY VEER N AND DECREASING TO 15-20 GUST 35 KTS.
BY TOMORROW MORNING WINDS CONTINUE TO VEER BECOMING W AGAIN BY
18Z.
GGW WATCHES/WARNINGS/ADVISORIES
RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR
DAWSON/MCCONE/PRAIRIE/RICHLAND/WIBAUX COUNTIES-NORTHERN VALLEY
AND NORTHERN PHILLIPS COUNTIES-SOUTHERN PETROLEUM AND SOUTHERN
GARFIELD COUNTIES-THE LITTLE ROCKIES-THE LOWER MISSOURI RIVER
BREAKS INCLUDING THE CHARLES M RUSSELL NATIONAL WILDLIFE REFUGE.
HIGH WIND WARNING UNTIL 6 PM MDT THIS EVENING FOR CENTRAL AND
SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-GARFIELD-NORTHERN
PHILLIPS-NORTHERN VALLEY-PETROLEUM.
HIGH WIND WARNING UNTIL 9 PM MDT THIS EVENING FOR SOUTHWEST
PHILLIPS.
WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO 6 AM MDT
MONDAY FOR SOUTHWEST PHILLIPS.
WEATHER.GOV/GLASGOW
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