Sub-severe thunderstorms rolled through the area on June 13.
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.
Sub-severe thunderstorms rolled through the area on June 13.
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 13, 2:24 PM MST, 2 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 324 PM MDT WED JUN 13 2012 .SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH FRIDAY... THE SHORTWAVE TROUGH THAT BROUGHT SHOWERS TODAY TO THE AREA SHIFTS EAST TONIGHT...SENDING THE STORM SYSTEM LOW CENTER INTO SOUTHERN SASKATCHEWAN. MUCH OF NORTHEAST MONTANA WILL BE DRY SLOTTED TONIGHT. HOWEVER OVERRUNNING MOISTURE ALONG THE FRONTAL BOUNDARY THAT STRETCHES ACROSS THE BILLINGS AREA COULD BRING SOME SHOWERS AND THUNDER ACROSS OUR SOUTHERN ZONES. SPC HAS PLACED EXTREME EASTERN ZONES IN SE MONTANA IN THEIR CONVECTIVE OUTLOOK FOR SLIGHT RISK FOR SEVERE FOR LATE AFTERNOON AND EVENING WITH STORMS MOVING INTO THE DAKOTAS. ALSO WRAP-AROUND MOISTURE FROM THE NOW STACKED LOW WILL BRING ADDITIONAL SHOWERS ACROSS OUR NORTH. DUE TO INSTABILITY AND A STRONG JET ALOFT...WILL MAINTAIN SLIGHT CHANCE ELSEWHERE FOR TONIGHT. THURSDAY/THURSDAY NIGHT...AN UPPER RIDGE FOLLOWS THE SHORTWAVE TROUGH. HOWEVER CONTINUING WRAP-AROUND MOISTURE ACROSS THE NORTH WILL KEEP A CHANCE FOR SHOWERS ALONG THE INTERNATIONAL BOUNDARY. WEAK INSTABILITY SHOULD LIMIT THUNDER TO SLIGHT CHANCE. STRONG NORTHWEST WINDS BEHIND THE FRONT WILL KICK UP WINDS IN THE 15-25 KT RANGE THROUGH THE DAY...THEN DIMINISH FROM THE WEST IN LATE AFTERNOON. WINDS OVER THE LAKE COULD REQUIRE AN ADVISORY. WINDS BECOME LIGHT AND VARIABLE THURSDAY NIGHT. HIGHS NEAR NORMAL ARE EXPECTED. FRIDAY...THE NEXT UPPER LEVEL DISTURBANCE WHICH CAN BE CURRENTLY SEEN ON THE WATER VAPOR LOOP IN THE GULF OF ALASKA WILL MOVE ACROSS SOUTHWESTERN CANADA. THIS SHORTWAVE TROUGH BEGINS TO STACK UP IN THE AFTERNOON AND SENDS A COLD FRONT ACROSS OUR AREA... DEVELOPING SHOWERS AND BASED ON MODERATE INSTABILITY...MORE THUNDER. DEPENDING ON TIMING SOME STRONG STORMS ARE POSSIBLE...BUT MORE LIKELY TO OUR EAST. SO WILL HOLD OFF ON ANY MENTION FOR NOW. AGAIN...HIGHS NEAR NORMAL ARE EXPECTED. .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY... A SHORTWAVE OVER THE CENTRAL MONTANA WILL MOVE EAST INTO NORTH DAKOTA TAKING THE SHOWERS AND THUNDERSTORMS TO THE EAST BY SATURDAY MORNING. SO SINCE THE LATEST MODELS ARE MOVING THIS SYSTEM TO EAST A LITTLE FASTER THEN THE PREVIOUS RUNS DECIDED TO DROP THE POPS FOR SATURDAY AND SATURDAY NIGHT. SO WEATHER FOR SATURDAY MORNING WHEN THE DAM RACE IS GOING ON AT FORT PECK WILL BE DRY. IT WILL BE ON THE COOL SIDE WITH NORTHWEST WINDS BETWEEN 20 AND 30 MPH. TEMPERATURES DURING THE RACE WILL BE IN THE 50S WITH CLOUDY SKIES. ANOTHER SHORTWAVE WILL MOVE THROUGH THE NORTHERN ROCKIES SATURDAY NIGHT PRODUCING SHOWERS SUNDAY MORNING AND A THUNDERSTORM OR TWO SUNDAY AFTERNOON AND EVENING. OVERALL THE REGION WILL BE UNDER A LARGE TROUGH SUNDAY NIGHT THROUGH WEDNESDAY NIGHT. SO LEFT THE BROAD BRUSHED LOW CHANCE POPS IN THE FORECAST. WE WILL SEE BELOW NORMAL HIGHS DURING THIS TIME FRAME. RSMITH && .AVIATION... VFR. AN APPROACHING WEATHER SYSTEM WILL BRING MORE SPOTTY SHOWERS AND THUNDERSTORMS TO THE AREA TODAY. BRIEF MVFR MAY BE POSSIBLE AT ALL TERMINALS. THE WINDS WILL REMAIN WESTERLY AT 10 TO 18 KNOTS THIS AFTERNOON BEFORE DROPPING BELOW 10 KNOTS THIS EVENING AT ALL TERMINALS. RSMITH && .GLASGOW WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY FROM 7 AM TO 6 PM MDT THURSDAY FOR FORT PECK LAKE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 236 PM MDT WED JUN 13 2012 MTZ016-017-021>023-141000- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- PETROLEUM-GARFIELD-MCCONE- 236 PM MDT WED JUN 13 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NORTHWEST WINDS BEHIND A COLD FRONT WILL INCREASE TO 15 TO 25 MILES PER HOUR THURSDAY. THEREFORE A LAKE WIND ADVISORY HAS BEEN ISSUED FOR FORT PECK LAKE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Glasgow radar (KGGW), 3 km away, was scanning. The volume nearest the first event began at 23:30 UTC.
2 hail. Local standard time, as filed.
A National Weather Service employee reported mainly dime to pea sized hail, with a few stones penny sized about 2 miles south-southeast of Glasgow in Valley County.
Nickel sized hail was reported 18 miles north of Poplar in Roosevelt County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2012Every state in 2012This day in weather historyWarnings in Montana, June 2012
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: 393757, 393758.