Runoff from heavy rainfall from overnight on the 6th-7th and during the 7th brought flooding to the area.
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.
Runoff from heavy rainfall from overnight on the 6th-7th and during the 7th brought flooding to the area.
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 7, 2:50 AM MST, 32 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 350 AM MDT TUE JUN 7 2011 .SHORT TERM...FOR NORTHEAST MONTANA...TODAY THROUGH THURSDAY... MORE SIGNIFICANT RAINFALL POSSIBLE TODAY AS STACKED LOW MOVES THROUGH EASTERN MONTANA AND NORTH DAKOTA. THE SURFACE LOW CURRENTLY IN SE MONTANA WILL MOVE TO NORTH DAKOTA WHILE THE UPPER LOW TRACKS ALONG THE YELLOWSTONE RIVER TODAY. MORE HEAVY RAIN WILL FALL NORTH OF THE LOW TRACK ON TOP OF THE INCH OR SO OF RAIN THAT FELL OVERNIGHT. THIS RAIN WILL ADD TO THE FLOODING ALREADY IN PLACE AND FLOOD NEW AREAS. ALSO...LOOK FOR STRONG NORTH TO NORTHEAST WINDS WITH SPEEDS CLOSE TO WARNING CRITERIA THIS MORNING. WILL HOLD OFF ON ISSUING A HIGH WIND WARNING AT THIS TIME. WILL MAINTAIN LAKE WIND ADVISORY. THE SE ZONES WILL SEE DRY SLOTTING AT TIMES TODAY REDUCING THE AMOUNT OF RAINFALL THAT OCCURS THERE. THE STORM SYSTEM WILL MOVE TO THE EAST TONIGHT ALLOWING THE SHOWERS TO DIMINISH FROM WEST TO EAST. WITH HIGH PRESSURE MOVING INTO THE REGION TONIGHT...WINDS WILL DROP OFF ALLOW THE LAKE WIND ADVISORY TO END BY WEDNESDAY MORNING. HIGH PRESSURE WILL KEEP WEDNESDAY DRY FOR THE MOST PART WITH LIGHT WINDS. A SHORTWAVE MOVING THROUGH SOUTHEAST MONTANA IN THE AFTERNOON COULD BRING A SHOWER TO PARTS OF THE AREA. WILL MENTION A SLIGHT CHANCE FOR NOW. THE NEXT UPPER TROUGH MOVES ACROSS MONTANA WEDNESDAY NIGHT AND THURSDAY. MODELS DIFFER SOMEWHAT ON HOW MUCH OF THE FORECAST AREA WILL SEE RAIN FROM THIS SYSTEM. THEY HAVE BETTER CHANCES OF RAIN SOUTH OF THE MISSOURI RIVER THAN TO THE NORTH AT THIS TIME. WILL FOCUS THE HIGHER CHANCES OF SHOWERS AND THUNDERSTORMS TO THE SOUTH. FORRESTER .LONG TERM...THURSDAY NIGHT THROUGH TUESDAY... THE EXTENDED PERIOD BEGINS THURSDAY EVENING WITH THE AREA UNDER AN UPPER LEVEL SHORTWAVE TROUGH WHICH WILL CONTINUE THE CHANCE OF RAIN SHOWERS. THEN FRIDAY A NARROW UPPER RIDGE WILL BRING CUT OFF MOST SHOWER ACTIVITY. THERE IS SOME DISAGREEMENT HERE BETWEEN THE GFS AND EC WITH THE GFS MOVING EAST QUICKER. THE EC HANGS ONTO THE TROUGH FOR OUR EASTERN ZONES A WHILE LONGER. BOTH MODELS BRING IN THE NEXT UPPER TROUGH FROM THE PACNW...BUT TIMING ISSUES CONTINUE. THE PERIOD THROUGH SATURDAY LOOKS SHOWERY. THEN SATURDAY NIGHT AND SUNDAY A COLD FRONT SHOULD INCREASE THE CHANCE FOR RAIN . THEN ANOTHER SHORTWAVE TROUGH DROPS INTO THE PACNW SUNDAY NIGHT. AS THIS STORM SYSTEM DROPS FARTHER SOUTH MONDAY THE BASE OF THE TROUGH PICKS UP PACIFIC MOISTURE AND DIRECTS IT NORTH INTO MONTANA WHICH COULD PRODUCE MORE PERIODS OF HEAVY RAIN. WITH GENERAL AND PERPETUAL TROUGHINESS PROGGED TO PERSIST OVER THE NORTHERN ROCKIES AND NORTHERN HIGH PLAINS THROUGHOUT THE ENTIRE LONG TERM FORECAST PERIOD...OVERALL THE PERIOD WILL BE CONTINUED WET WITH SEASONAL OR SLIGHTLY COOLER THAN NORMAL TEMPERATURES. CONVECTIVE PARAMETERS ALSO SUGGEST ALL PERIODS OF RAIN SHOWERS WILL BE ACCOMPANIED WITH SOME THUNDERSTORMS. WITH NONE OF THE LOWS STACKING UP AND NO RAPID SURFACE PRESSURE FALLS...EXPECT NO STRONG WINDS DURING THE PERIOD EXCEPT NEAR ANY THUNDERSTORMS THAT MIGHT DEVELOP. SCT && .AVIATION... THE REMAINDER OF THE STRONG STORM SYSTEM WILL MOVE OVER THE AREA TODAY BRINGING WIDESPREAD RAIN...ADDITIONAL ISOLATED THUNDERSTORMS AND STRONG EASTERLY TO NORTHEASTERLY WINDS OF AROUND 25G35KTS. THE STORM WILL MOVE OUT OF THE AREA LATER TONIGHT WHICH WILL DIMINISH WINDS AND TAPER OFF THE RAIN. EXPECT CONDITIONS LESS THAN VFR AT TIMES AND UPDATES TO THE TAFS BASED ON STORM CONDITIONS. SCT && .HYDROLOGY... FOR THE MILK AND MUSSELSHELL BASINS...EXPECT ONGOING FLOODING OF MAIN STEM RIVERS AND SMALLER STREAMS AND CREEKS DUE TO CONTINUED RUNOFF FROM RECENT AND EXPECTED HEAVY RAIN AND MOUNTAIN SNOW MELT. FLOOD WARNINGS ARE IN EFFECT. THE MISSOURI RIVER BELOW FORT PECK DAM WILL SEE A SUBSTANTIAL RISE IN WATER LEVELS EARLY THIS WEEK DUE TO INCREASING AMOUNTS OF WATER BEING RELEASED FROM THE FORT PECK RESERVOIR. A FLOOD WARNING IS NOW IN EFFECT FOR THIS AREA. WIDESPREAD HEAVY RAIN WILL CONTINUE TO IMPACT THE AREA TODAY WHICH WILL MAINTAIN THE CURRENT FLOODING AND CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. && .GLASGOW WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY UNTIL 6 AM MDT WEDNESDAY FOR FORT PECK LAKE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 409 AM MDT TUE JUN 7 2011 MTZ016-017-059>061-081015- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- NORTHERN PHILLIPS-SOUTHWEST PHILLIPS-NORTHERN VALLEY- 409 AM MDT TUE JUN 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT FLOODING CONTINUES ON SMALL STREAMS IN VALLEY AND PHILLIPS COUNTIES...AND ALONG THE MILK RIVER FROM JUST BELOW SACO TO THE CONFLUENCE WITH THE MISSOURI RIVER. NEW FLOODING IS EXPECTED ON THE MILK RIVER NEAR DODSON TODAY OR TONIGHT. FLOODING IS EXPECTED ON THE MISSOURI RIVER AS THE ARMY CORPS OF ENGINEERS INCREASE RELEASES FROM FORT PECK RESERVOIR. THEREFORE A FLOOD WARNING IS IN EFFECT ON THE MISSOURI RIVER FROM DOWNSTREAM OF FORT PECK DAM THROUGH THE NORTH DAKOTA BORDER. A STORM SYSTEM MOVING OVER THE AREA TODAY WILL BRING STRONG NORTH TO NORTHEAST WINDS AND HEAVY RAINS. A LAKE WIND ADVISORY FOR FORT PECK LAKE REMAINS IN EFFECT. THE WIDESPREAD RAIN IMPACTING THE AREA TODAY WILL MAINTAIN THE CURRENT FLOODING AND CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY FLOODING WILL PERSIST ON NUMEROUS STREAMS FOR THE FORESEEABLE FUTURE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ021-022-081015- PETROLEUM-GARFIELD- 409 AM MDT TUE JUN 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT FLOODING WILL CONTINUE ALONG THE MUSSELSHELL RIVER AND SOME SMALL STREAMS THROUGH THE WEEK. A STORM SYSTEM MOVING OVER THE AREA TODAY WILL BRING STRONG NORTH WINDS AND HEAVY RAINS. A LAKE WIND ADVISORY FOR FORT PECK LAKE REMAINS IN EFFECT. THE WIDESPREAD RAIN IMPACTING THE AREA TODAY WILL MAINTAIN THE CURRENT FLOODING AND CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY FLOODING WILL PERSIST ON NUMEROUS STREAMS FOR THE FORESEEABLE FUTURE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ020-023-024-062-081015- WESTERN ROOSEVELT-MCCONE-RICHLAND-EASTERN ROOSEVELT- 409 AM MDT TUE JUN 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT FLOODING IS EXPECTED ON THE MISSOURI RIVER AS THE ARMY CORPS OF ENGINEERS INCREASE RELEASES FROM FORT PECK RESERVOIR. THEREFORE... A FLOOD WARNING IS IN EFFECT ON THE MISSOURI RIVER FROM DOWNSTREAM OF FORT PECK DAM THROUGH THE NORTH DAKOTA BORDER. A STORM SYSTEM MOVING OVER THE AREA TODAY WILL BRING STRONG NORTHEAST WINDS AND HEAVY RAINS. A LAKE WIND ADVISORY FOR FORT PECK LAKE REMAINS IN EFFECT. THE WIDESPREAD RAIN IMPACTING THE AREA TODAY WILL MAINTAIN THE CURRENT FLOODING AND CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY FLOODING WILL CONTINUE ON THE MISSOURI RIVER FOR THE FORESEEABLE FUTURE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ018-019-081015- DANIELS-SHERIDAN- 409 AM MDT TUE JUN 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT A STORM SYSTEM MOVING OVER THE AREA TODAY WILL BRING STRONG NORTHEAST WINDS AND HEAVY RAINS. A LAKE WIND ADVISORY FOR FORT PECK LAKE REMAINS IN EFFECT. THE WIDESPREAD RAIN IMPACTING THE AREA TODAY MAY CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY 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. MTZ025>027-081015- DAWSON-PRAIRIE-WIBAUX- 409 AM MDT TUE JUN 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT A STORM SYSTEM MOVING OVER THE AREA TODAY WILL BRING STRONG WINDS AND THUNDERSTORMS...SOME MAY HAVE HEAVY RAIN. THE WIDESPREAD RAIN IMPACTING THE AREA TODAY MAY CREATE NEW FLOODING IN SOME AREAS DEPENDING ON HOW MUCH RAIN FALLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY 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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1230 AM MDT TUE JUN 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1228 AM HAIL SW NASHUA 48.13N 106.36W
06/07/2011 E0.75 INCH VALLEY MT TRAINED SPOTTER
ESTIMATED 1/2 INCH TO 3/4 INCH HAIL. HEAVY RAIN WITH
REDUCED VISIBILITY.
&&
RMORGANPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1239 AM MDT TUE JUN 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1236 AM HAIL 9 SSW LUSTRE 48.26N 105.93W
06/07/2011 E0.88 INCH VALLEY MT TRAINED SPOTTER
NICKEL SIZED HAIL AND HEAVY RAIN. 0.40 INCH RAIN IN 15
MINUTES.
&&
RMORGANPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1252 AM MDT TUE JUN 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1251 AM HEAVY RAIN SW NASHUA 48.13N 106.36W
06/07/2011 M0.50 INCH VALLEY MT TRAINED SPOTTER
1/2 INCH RAIN IN 20 MINUTES.
&&
RMORGANSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 100 AM MDT TUE JUN 7 2011 MTZ019-070800- SHERIDAN- 100 AM MDT TUE JUN 7 2011 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... EASTERN SHERIDAN COUNTY IN NORTHEAST MONTANA... UNTIL 200 AM MDT/300 AM CDT/. AT 1252 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 7 MILES NORTHEAST OF MEDICINE LAKE...MOVING NORTH AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS IN THE ADVISORY INCLUDE... ANTELOPE... COMERTOWN... THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 4854 10432 4858 10459 4901 10450 4901 10413 TIME...MOT...LOC 0700Z 192DEG 26KT 4865 10443 PROTON WEATHER.GOV/GLASGOW
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
107 AM MDT TUE JUN 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1251 AM HAIL 13 NW BROCKTON 48.31N 105.08W
06/07/2011 U0.50 INCH ROOSEVELT MT TRAINED SPOTTER
HAIL UNKNOWN SIZE. TOO DARK TO SEE THE HAIL SIZE.
&&
RMORGANPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
213 AM MDT TUE JUN 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0208 AM HAIL ESE WESTBY 48.87N 104.05W
06/07/2011 E1.00 INCH DIVIDE ND TRAINED SPOTTER
QUARTER SIZED HAIL. HEAVY RAIN.
&&
RMORGANThe national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
Runoff from a period of heavy rain resulted in flooding of the Big Muddy River.
Runoff from a period of heavy rain resulted in flooding of the three forks of the Poplar River.
Runoff from a period of heavy rain resulted in flooding along Porcupine Creek.
Runoff from a period of heavy rain resulted in flooding of mainly the Big Muddy River and smaller streams in the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2011Every state in 2011This day in weather historyWarnings in Montana, June 2011
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: 323650, 323649, 323657, 323658.