Strong wind moved and lifted wooden pallets. The closest reporting station is about 2 miles away and the winds at the time were gusting to 40 mph for a three hour time span.
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The episode as NWS GGW wrote it up.
Strong wind moved and lifted wooden pallets. The closest reporting station is about 2 miles away and the winds at the time were gusting to 40 mph for a three hour time span.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Glasgow, MT wrote its last area forecast discussion before the first event at Aug 19, 8:56 AM MST, 4 hours 59 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 956 AM MDT WED AUG 19 2009 .SHORT TERM...FOR NORTHEAST MONTANA...TODAY... QUITE A BIT OF CLEARING THIS MORNING OVER THE CWA WITH ONLY A FEW SHOWERS...AND THUNDERSTORM OR TWO AS WELL. WITH THE AIRMASS MOIST AND UNSTABLE THOUGH...EXPECT A FAIR AMOUNT OF CONVECTION TO RE- DEVELOP THIS AFTERNOON...ESPECIALLY IN OUR E...CLOSE TO THE UPPER LOW MOVING SE FROM SK INTO ND. 12Z KGGW SOUNDING SHOWING 100 KT JET MOVING ACROSS OUR AREA WITH THE UPPER TROUGH. LAKE WIND ADVISORY CRITERIA ALREADY MET WITH 20-25 MPH WINDS AT FORT PECK LAKE. WINDS IN 850-700 MB LAYER DONT CHANGE MUCH THROUGH THE DAY...SO IT WILL REMAIN WINDY INTO EVENING. MORNING UPDATE IS MAINLY TO LOWER MORNING POPS. SIMONSEN PREVIOUS SHORT TERM...FOR NORTHEAST MONTANA TODAY THROUGH FRIDAY...COLD FRONT THROUGH THE STATE WITH DEEP LOW SPINNING INTO MANITOBA. STRONG JET DIVING THROUGH ALBERTA/SASKATCHEWAN WITH AREA OF CHANNELED VORTICITY. MAJORITY OF SHOWERS/THUNDERSTORMS MOVING OUT OF THE AREA WITH THE NOSE OF THE JET...BUT SHOULD HAVE SCATTERED TO ISOLATED SHOWERS FOR THE REMAINDER OF THE DAY WITH THE CHANNELED VORTICITY AND WRAPPING AROUND THE MANITOBA LOW. THESE WILL EXIT THE REGION BY EVENING AS THE SYSTEM MOVES FURTHER EAST. WINDS WILL OF MORE CONCERN TODAY...WITH TIGHT PRESSURE GRADIENT BETWEEN MANITOBA LOW AND HIGH PRESSURE IN BC. WINDS ALOFT ALSO SIGNIFICANT...20-30KTS AT 850MB AND A LITTLE STRONGER AT 700MB. COLD AIR ADVECTION AND PRESSURE RISES WITH THE HIGH BUILDING WILL AID IN MIXING THESE WINDS TO THE SURFACE RESULTING IN WINDY CONDITIONS MEETING LAKE WIND CRITERIA FOR FORT PECK LAKE. WINDS DIMINISH THIS EVENING WITH HIGH PRESSURE SETTLING OVER THE STATE. THURSDAY SEES NORTHEAST MONTANA STILL UNDER NORTHWEST FLOW ALOFT...WITH UPPER TROF TO THE EAST AND RIDGE TO THE WEST. UPPER RIDGE WILL BEGIN TO DOMINATE WITH WARMER AND DRIER WEATHER...BUT PROXIMITY OF UPPER TROF WILL BRING SOME BREEZY CONDITIONS TO THE EASTERN ZONES ON THURSDAY AFTERNOON. BY FRIDAY THE UPPER RIDGE MOVES OVER MONTANA...WITH SURFACE HIGH PRESSURE SLIDING OFF TO THE EAST. AGAIN WARMER AND DRIER WEATHER RESULT WITH WINDS TURNING TO THE SOUTHEAST. EBERT .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY... THE LONG TERM PERIOD STARTS WITH A LARGE AMPLIFIED UPPER LEVEL RIDGE THAT STRETCHES INTO NORTHERN SASKATCHEWAN. THIS IS SUPPORTED BY A RATHER LARGE CLOSED ANTICYCLONE OVER THE FOUR CORNERS REGION. BOTH THE GFS AND ECMWF ARE IN GOOD AGREEMENT WITH 500 MB HEIGHTS CLIMBING INTO THE UPPER 580 DM...ALONG WITH THICKNESS VALUES APPROACHING THE LOWER 580 DM. THE VALUES WILL BE A LITTLE STRONGER ON SATURDAY THEN ON FRIDAY SO THE HIGH TEMPERATURES ON SATURDAY AFTERNOON WILL REACH INTO THE MID TO UPPER 90S WITH SOME SPOTS HITTING TRIPLE DIGITS. BOTH MODELS WEAKEN THE RIDGE ON SUNDAY WITH A WEAK COLD FRONT PASSING THROUGH EASTERN MONTANA. BOTH MODEL RUNS ARE BRINGING THE FRONT THROUGH THE REGION DURING THE DAY ON SUNDAY. GULF MOISTURE SHOULD BE SHUT OFF ACROSS EASTERN MONTANA BUT THE MODELS ARE INDICATING PACIFIC MOISTURE MOVING NORTHWARD ON THE BACKSIDE OF THE RIDGE. LEFT THE FORECAST DRY FOR SUNDAY AFTERNOON JUST NOT BUYING THE PACIFIC MOISTURE ON THE ECMWF. THE GFS HAS A LITTLE PACIFIC MOISTURE BUT FOR THE MOST PART KEEPS THINGS DRY ACROSS NEMONT ANOTHER FAST MOVING SHORTWAVE WILL HELP FLATTEN THE RIDGE ACROSS SOUTHERN ALBERTA AND SASKATCHEWAN SUNDAY NIGHT INTO MONDAY. THIS FEATURE WILL PASS TO THE NORTH OF THE REGION SO MOST OF THE THUNDERSTORM ACTIVITY WILL REMAIN NORTH OF THE INTERNATIONAL BORDER. HOWEVER DID LEAVE A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE FORECAST FOR SUNDAY NIGHT AND MONDAY MORNING...SINCE THE ECMWF HAS FEATURE A LITTLE CLOSER TO NEMONT THEN THE GFS DOES. MONDAY AFTERNOON THROUGH TUESDAY NIGHT THE SHORTWAVE OVER SASKATCHEWAN WILL MOVE INTO EASTWARD INTO MANITOBA AND BE REPLACED BY THE AN UPPER LEVEL RIDGE...THE MODELS ARE IN AGREEMENT ON THE STRENGTH OF THE RIDGE BUT PLACEMENT IS STILL A LITTLE OFF. RSMITH WEDNESDAY AND THURSDAY... THE GFS HAS THE LOW OVER NORTHERN MANITOBA DEPICTED DEEPER THEN THE ECMWF AND ITS PROGRESSION IS SLOWER AS WELL. THE ECMWF PORTRAYS A MORE AMPLIFIED RIDGE WITH A SHORTWAVE APPROACHING AROUND 12Z WEDNESDAY...WHERE AS THE GFS MOVES THE SHORTWAVE THROUGH AT 00Z WEDNESDAY. THE STRENGTH AND TIMING OF THIS FEATURE REMAINS UNCERTAIN AT THIS POINT. POPS AND CLOUD COVER WERE INCREASED A BIT TO REFLECT THIS FEATURE IN THE LAST 24 HOURS OF THE PERIOD. THE RIDGE WILL STILL BE IN PLACE BUT WILL WEAKEN SLIGHTLY...SO TEMPERATURES REMAIN NEARLY THE SAME. SHOWERS MAY BE POSSIBLE WITH THIS DISTURBANCE BUT CONFIDENCE REMAINS LOW AT THIS POINT. AES && .AVIATION... ANY SHOWER ACTIVITY TODAY SHOULD MAINLY BE ISOLATED IN NATURE AS WIND AND A PARTLY CLOUDY VFR SKY ARE EXPECTED. BETTER CHANCE OF SHOWERS ARE EXPECTED OVER THE DAKOTAS. THE NORTHWEST WIND AT THE TERMINALS IS EXPECTED TO BE ABOUT 20 KTS WITH GUSTS TO 30 KTS. OTHERWISE HIGH PRESSURE IS EXPECTED TO BRING QUIET CONDITIONS TO THE AREA THROUGH THE NEXT COUPLE OF DAYS. JAMBA && .GLASGOW WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY UNTIL 9 PM MDT THIS EVENING FOR FORT PECK LAKE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 338 AM MDT WED AUG 19 2009 MTZ016>027-059>062-200945- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE- RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS- SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT- 338 AM MDT WED AUG 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT COOL AND WINDY WEATHER EXPECTED TODAY BEHIND A STRONG COLD FRONT. NORTHWEST WINDS WILL INCREASE TO 20 TO 30 MPH BY LATE MORNING WITH FREQUENT GUSTS TO 40 MPH DURING THE AFTERNOON. A LAKE WIND ADVISORY IS IN EFFECT FOR FORT PECK LAKE FOR TODAY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 strong wind. Local standard time, as filed.
Wooden pallets moved and thrown around downstream from origination point. Occurred 4 W of Fort Peck.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2009Every state in 2009This day in weather historyWarnings in Montana, August 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 188215.