Just enough instability and moisture was present in the atmosphere to produce one lone severe thunderstorm over Dawson County.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GGW wrote it up.
Just enough instability and moisture was present in the atmosphere to produce one lone severe thunderstorm over Dawson County.
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 Jun 29, 7:14 PM MST, 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 814 PM MDT SUN JUN 29 2014 .SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH TUESDAY... CHANGES FOR THIS EVENING WERE MINIMAL WITH ONLY THE WIND FIELDS BEING TWEAKED SLIGHTLY. A BAND OF SHOWERS AND ISOLATED THUNDER ON RADAR IS SPREAD FROM SOUTHERN PHILLIPS COUNTY TO NORTHERN DAWSON COUNTY. THESE SHOWERS ARE ANTICIPATED TO CONTINUE THROUGH AROUND 9 TO 10 PM THEN STEADILY DIMINISH WITH ALMOST NO SHOWERS ACROSS THE REST OF THE CWA UNTIL WELL AFTER MIDNIGHT... WHEN THE COLD FRONT WILL SPREAD ACROSS THE REGION AND PROVIDE A LIFT MECHANISM FOR SHOWERS THROUGH TOMORROW. GAH PREVIOUS SHORT TERM DISCUSSION... GOES SATELLITE IMAGERY CLEARLY REVEALS A CYCLONIC LOW SPINNING OVER SOUTHERN MANITOBA. THIS HAS SET UP A FAIRLY STRONG PRESSURE GRADIENT ACROSS SOUTHEAST MONTANA. THE 12Z GGW SOUNDING SHOWS A VERTICAL WIND PROFILE THAT REMAINS LINED UP TO 400MB...WITH FAIRLY GOOD MIXING FROM 700MB. THIS WILL SUSTAIN STRONG WIND ACROSS THE REGION. MODELS SHOW THE LOW CENTER NOT MOVING AWAY FROM THE AREA UNTIL MONDAY AFTERNOON. SO STRONG WIND REMAINS RELATIVELY CERTAIN...ALONG WITH THE WIND ADVISORY FOR FORT PECK LAKE THROUGH EARLY MONDAY EVENING. THE MAIN UNCERTAINTY IS HOW MUCH OF THE WRAPPED AROUND CLOUD DECK AND ASSOCIATED RAIN WILL DRIFT SOUTH INTO THE NORTHERN TIER OF OUR CWA. A SHORTWAVE DISTURBANCE EJECTED EAST BY THE CLOSED LOW PARKED OVER SOUTHEAST ALASKA WILL MERGE WITH AND BE ABSORBED BY THE MANITOBA LOW. THIS EMBEDDED WAVE WILL PULL RAIN SOUTH FROM SASKATCHEWAN OVER NORTHEAST MONTANA LATE TONIGHT AND MONDAY FOR MORE WIDESPREAD RAIN. VEERING FLOW ALOFT WILL SHIFT NORTHWEST WIND MORE TO NORTHERLY ON MONDAY. SO EXPECT MONDAY TO BE THE COOLEST DAY...BOTH FROM THE NORTHERLY FLOW AND SPREADING CLOUD COVER. CONDITIONS BEGIN TO CHANGE FOR TUESDAY. A STRONG UPPER LEVEL RIDGE BUILDING UP OVER THE GREAT BASIN INTO THE NORTHERN ROCKIES WILL BEGIN TO BE THE MAIN PLAYER. SURFACE HIGH PRESSURE WILL BEGIN TO MOVE INTO THE NORTHERN PLAINS. WHILE THE STATIONARY FRONT REMAINS OVER NORTHEAST MONTANA...ISOLATED RAIN SHOWERS REMAIN A POSSIBILITY. BUT EXPECT TEMPERATURES TO BEGIN TO INCREASE. HOWEVER HIGHS WILL LIKELY NOT RISE ABOVE NORMAL JUST YET. SCT .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY... LITTLE CHANGE TO THE GOING EXTENDED FORECAST. UPPER RIDGE EXPECTED TO BUILD INTO THE HIGH PLAINS WITH WARMING TEMPERATURES AND DRY WEATHER. AS THE RIDGE SHIFTS EAST LATE IN THE WEEK...PATTERN LOOKS BETTER FOR THUNDERSTORMS. EBERT PREVIOUS LONG TERM DISCUSSION... MODELS BRING AN UPPER RIDGE INTO MONTANA FOR THE MIDDLE OF THE WEEK WITH DRY WEATHER AND WARMER TEMPERATURES. DEPENDING ON HOW QUICKLY THIS RIDGE BUILDS INTO THE AREA...EITHER THURSDAY OR FRIDAY WILL BRING THE FIRST 90 DEGREE READING EITHER SINCE LATE MAY OR FOR THE YEAR IN MANY AREAS. MODELS ARE IN BETTER AGREEMENT IN THEIR 00Z SUNDAY RUNS ABOUT KEEPING THE UPPER RIDGE OVER THE AREA INTO THE WEEKEND. HOWEVER...WEAK SHORTWAVES MOVING ACROSS THE RIDGE COMBINED WITH A SLOW MOVING FRONTAL SYSTEM MAY BE ENOUGH TO TOUCH A FEW THUNDERSTORMS AT TIMES MAINLY FROM FRIDAY ONWARD. WILL MENTION A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FOR NOW. MODELS HAVE SOME RUN TO RUN DIFFERENCES ON WHEN AND HOW MUCH TO FLATTEN THE RIDGE OVER THE WEEKEND. WILL KEEP TEMPERATURES ON THE WARM SIDE. FORRESTER && .AVIATION... FLIGHT CATEGORY: VFR...MARGINAL MVFR 06Z-15Z. SYNOPSIS: A STRONG LOW PRESSURE SYSTEM OVER MANITOBA WILL GIVE STEADY AND STRONG NORTHWEST WINDS THROUGH MONDAY. SUSTAINED WEST TO NORTH WINDS OF 20 TO 30 KTS WILL BE COMMON DURING THE DAY. THERE WILL BE A MIX OF LOW AND MID LEVEL CLOUDS WITH POPCORN SHOWERS SPREADING SOUTH THIS EVENING AND MVFR CEILINGS WITH RAIN SHOWERS ARE POSSIBLE AT TIMES TONIGHT AND MONDAY. && .GLASGOW WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY UNTIL 9 PM MDT MONDAY FOR FORT PECK LAKE FOR CENTRAL AND SOUTHEAST PHILLIPS...CENTRAL AND SOUTHERN VALLEY... GARFIELD...MCCONE...PETROLEUM. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 307 AM MDT SUN JUN 29 2014 MTZ016>027-059>062-300900- 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- 307 AM MDT SUN JUN 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT A LAKE WIND ADVISORY FOR FORT PECK LAKE IS IN EFFECT TODAY THROUGH MONDAY FOR SUSTAINED WEST WIND OF 20 TO 30 MPH WITH GUST UP TO 45 MPH AT TIMES. WINDS WILL SLACKEN SLIGHTLY OVERNIGHT AND INCREASE AGAIN MONDAY MORNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A STORM SYSTEM OVER THE SOUTHERN CANADIAN PRAIRIE WILL KEEP WINDS STRONG OVER NORTHEAST MONTANA THROUGH MONDAY. EXPECT GUSTY WEST TO NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH TO CONTINUE. THE LAKE WIND ADVISORY FOR FORT PECK LAKE WILL REMAIN IN EFFECT THROUGH EARLY MONDAY EVENING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Glasgow radar (KGGW), 140 km away, was scanning. The volume nearest the first event began at 02:39 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trained spotter measured a 70 mph wind gust from a dying rain shower downburst which knocked down a tree.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2014Every state in 2014This day in weather historyWarnings in Montana, June 2014
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: 524657.