An additional two inches of rain fell across the area, bringing flooding to creeks and streams in 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.
An additional two inches of rain fell across the area, bringing flooding to creeks and streams in 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 May 29, 8:13 PM MST, 3 hours 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 913 PM MDT SUN MAY 29 2011 .SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH TUESDAY... STILL SOME UNCERTAINTY AS TO THE EXACT TRACK OF THE UPPER LEVEL STORM SYSTEM CURRENTLY WORKING NORTHWARD OUT OF THE GREAT BASIN. HOWEVER THAT WILL GENERALLY HAVE AN IMPACT ON PRECIPITATION AMOUNTS AND NOT PRECIPITATION CHANCES AS ALL AREAS WILL SEE RAIN BY LATE TONIGHT...CONTINUING THROUGH THE DAY MONDAY. PERIODS OF HEAVY RAIN ARE EXPECTED AND FLOOD WATCHES AND WARNINGS REMAIN IN EFFECT ACROSS THE AREA. WINDS WILL INCREASE LATE TONIGHT OUT OF THE EAST TO NORTHEAST. EXPECT WINDY CONDITIONS ON FORT PECK LAKE BY MIDNIGHT WITH GUSTS UP TO 45 MPH EXPECTED ON MONDAY. A LAKE WIND ADVISORY HAS BEEN POSTED BEGINNING AT 6 AM MONDAY MORNING THROUGH MONDAY EVENING. OVERALL FORECAST WAS IN GOOD SHAPE. LOWERED TEMPERATURES A FEW DEGREES BASED ON LATEST TRENDS AND GUIDANCE. MOST LOCATIONS WILL SEE LOWS IN THE 40S OVERNIGHT. INCREASED PRECIPITATION ACCUMULATIONS FOR TONIGHT THROUGH TOMORROW. LATEST MODELS SHOWING 1 TO 3 INCHES OF ACCUMULATION POSSIBLE OVER MUCH OF THE AREA BY TUESDAY MORNING. CHAMBERS .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY... SHORT WAVE RIDGE BUILDING OVER THE AREA TUESDAY NIGHT AND WILL BRING DRY WEATHER THROUGH MIDDAY WEDNESDAY. ANOTHER UPPER LOW WILL BEGIN MOVING ONTO THE WEST COAST WEDNESDAY AND WILL CAUSE THE FLOW ALOFT TO BEGIN BACKING. THIS WILL ALLOW ENERGY TO PUSH ACROSS THE WESTERN ZONES AND BRING A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS. CHANCES OF PRECIPITATION WILL SPREAD EASTWARD ON THURSDAY AS THE WEST COAST TROUGH SETS UP OVER MONTANA. AFTERNOON HEATING ALONG WITH UPPER LIFT AND AMPLE LOW LEVEL MOISTURE WILL COMBINE TO BRING SCATTERED SHOWERS AND THUNDERSTORMS TO THE AREA. CONTINUED A DRY FORECAST FOR SATURDAY AND SUNDAY BUT AS A SPLIT FLOW SETS UP ACROSS THE AREA. TEMPERATURES WARMING THROUGH THE PERIOD AND SHOULD REACH ABOVE NORMAL ON THURSDAY. SLIGHTLY COOLER AIR MOVING BACK INTO THE AREA FOR FRIDAY THROUGH THE WEEKEND BUT SEASONAL VALUES ARE EXPECTED. RICHMOND && .AVIATION... A STORM SYSTEM MOVING NORTH OUT OF WYOMING WILL SPREAD RAIN AND IFR CONDITIONS NORTHWARD THIS EVENING. EXPECT CEILINGS TO DECREASE TO IFR OVER SOUTHERN AREAS BY MIDNIGHT...SPREADING NORTH TO THE HIGHLINE BY 10Z. PERIODS OF HEAVIER RAIN WILL PRODUCE LOCALIZED LIFR OR LOWER CONDITIONS. EAST TO NORTHEAST WINDS WILL INCREASE LATE TONIGHT INTO TOMORROW MORNING...WITH GUSTS OVER 25KTS EXPECTED BY 16Z. CHAMBERS && .GLASGOW WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH THROUGH LATE TUESDAY NIGHT FOR 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. LAKE WIND ADVISORY FROM 6 AM MONDAY TO MIDNIGHT MDT MONDAY NIGHT FOR FORT PECK LAKE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 423 PM MDT SUN MAY 29 2011 MTZ016>027-059>062-302230- 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- 423 PM MDT SUN MAY 29 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TONIGHT FLOOD WARNINGS REMAIN IN EFFECT FOR THE MILK RIVER FROM TAMPICO DOWNSTREAM TO THE CONFLUENCE WITH THE MISSOURI RIVER NEAR NASHUA. A FLOOD WARNING ALSO CONTINUES FOR THE MUSSELSHELL RIVER DRAINAGE AREA INCLUDING THE MUSSELSHELL RIVER. A FLOOD WARNING IS IN EFFECT FOR THE YELLOWSTONE RIVER AT GLENDIVE. PLEASE SEE OUR WEBSITE FOR FURTHER DETAILS ON THE FLOODING. FLOOD WATCH IS IN EFFECT TONIGHT AS ANOTHER POTENT STORM SYSTEM MOVES INTO THE AREA. PLEASE SEE OUR WEBSITE FOR FURTHER DETAILS ON THE FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HEAVY RAIN RAINFALL WILL CONTINUE OVER THE AREA WITH A TOTAL OF 1 TO 3 INCHES WITH LOCALLY HIGHER AMOUNTS POSSIBLE THROUGH TUESDAY. THE RAINFALL WILL CAUSE AREA CREEKS TO POTENTIALLY FLOW OUT OF THEIR BANKS. THE RUNOFF WITH TAKE TIME TO REACH THE MILK...MISSOURI AND YELLOWSTONE RIVERS AND FLOODING MAY CONTINUE INTO THE MIDDLE OF NEXT WEEK. .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.
4 flood. Local standard time, as filed.
Creeks and streams flowed out of their banks in some areas.
Creeks and streams flowed out of their banks in some areas.
Creeks and streams flowed out of their banks in some areas.
Creeks and streams flowed out of their banks in some areas.
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, May 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: 322406, 322407, 322409, 322410.