The month of May produced record rainfall in spots across northeast Montana. Heavy rainfall from the 20th to the 23rd led to some small stream flooding in parts of Valley and Phillips County from the evening of the 22nd through the early afternoon of the 25th.
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.
The month of May produced record rainfall in spots across northeast Montana. Heavy rainfall from the 20th to the 23rd led to some small stream flooding in parts of Valley and Phillips County from the evening of the 22nd through the early afternoon of the 25th. Tallow Creek in southeast Phillips County was out of its banks in several locations. Both Timber and Square Creek in southwest Valley County were out of their banks or nearly so. Low lying areas near Brazil Creek (just west of Glasgow) had significant ponding of water with some outbuildings affected. There were no reports of any major flooding or structures that were damaged.
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 22, 7:33 PM MST, 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 833 PM MDT TUE MAY 22 2007 .SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH THURSDAY... UPDATE...NORTH WINDS HAVE DIMINISHED TO 10 TO 20 MPH ACROSS THE AREA THIS EVENING. WILL CANCEL LAKE WIND ADVISORY IN UPDATE. BAND OF STEADY RAIN IS COVERING THE WESTERN 2/3RDS OF THE FORECAST AREA AT THIS TIME. WITH MOISTURE STREAMING AROUND THE UPPER LOW CENTERED NEAR BILLINGS...EXPECT THIS RAIN TO CONTINUE OVERNIGHT AND SHOULD SPREAD EAST TOWARDS THE NORTH DAKOTA BORDER. WILL EXTEND 80-100 POPS TO COVER MOST AREAS FOR THE REST OF THE NIGHT. WILL KEEP A MIX OF SNOW IN THE SOUTHWEST ZONES WHERE TEMPERATURES WILL GET COLD ENOUGH IN SOME HIGHER ELEVATION AREAS. REST OF FORECAST IS ON TRACK. FORRESTER PREVIOUS SHORT TERM... UPPER LEVEL LOW WILL DOMINATE THE WEATHER IN NORTHEAST MONTANA UNTIL WEDNESDAY EVENING. MODELS IN GENERAL AGREEMENT ON PATTERN. AN UPPER LEVEL LOW SLOWLY MOVING TO THE EAST SOUTH OF THE AREA WILL BRING UNSETTLED WEATHER TO THE AREA FOR THE NEXT 24 HOURS OR SO. ON WEDNESDAY EVENING THE LOW MOVES WELL INTO THE CENTRAL PLAINS ALLOWING FOR A WEAK RIDGE TO MOVE IN THE AREA. BEFORE NEXT SYSTEM MOVES IN THE EXTENDED PERIOD. TEMPERATURES WILL REMAIN ON THE COOL SIDE. WINDS CONTINUE TODAY AND EXPECT THAT THEY MAY LAST A LITTLE LONGER THIS EVENING SO WILL EXTEND THE LAKE WIND ADVISORY SLIGHTLY. WINDS LOOK GOOD FOR ANOTHER LAKE WIND ADVISORY FOR TOMORROW...HOWEVER...WILL HOLD OFF ON ISSUING THE ADVISORY. PRECIPITATION WITH THIS EVENT MAY BE INTENSE ENOUGH AT TIMES ESPECIALLY IN SOUTHWEST THAT TONIGHT WE MAY NOT BE ABLE TO RULE OUT A LITTLE SNOW MIXED IN WITH THE RAIN. TEMPERATURES SHOULD REMAIN ABOVE FREEZING SO WILL NOT ISSUE ANY ADVISORIES AS NOTHING SHOULD STICK. WEDNESDAY THE RAIN IN MANY AREAS WILL CONTINUE AS LOW SLOWLY MOVES OUT. NOT REALLY A LOT OF CHANGE IN THE WEATHER FROM TONIGHT TO WEDNESDAY. WEDNESDAY NIGHT INTO THURSDAY WILL BE A TRANSITION AS THE UPPER RIDGE BUILDS. TLSJR .LONG TERM...THURSDAY NIGHT THROUGH TUESDAY... BIGGEST CHANGE TO PREVIOUS LONG TERM PACKAGE WAS TO BOOST POPS OVER THE SOUTHWEST ON FRIDAY GIVEN GOOD AGREEMENT BETWEEN ECMWF...GFS AND GEM WITH THE HANDLING OF A NORTHERN STREAM TROUGH. TEMPERATURES ON SATURDAY MORNING STILL LOOK TO GET QUITE COOL ESPECIALLY ACROSS THE NORTH WHERE A SURFACE HIGH EXTENSION COMBINED WITH CLEARING SKIES TRIES TO NESTLE IN. HERE 850MB TEMPERATURES FALL TO ZERO AND THIS MAY NECESSITATE DROPPING VALUES FURTHER. MCZ PREVIOUS LONG TERM DISCUSSION... GENERAL UPPER PATTERN FOR THE EXTENDED PERIOD IS TROF...RIDGE... TROF WITH MAIN MODEL DIFFERENCES INVOLVING TIMING OF EACH FEATURE INTO AND OUT OF MONTANA. FIRST TROF ROTATES ACROSS MONTANA ON FRIDAY AND INTO NORTH DAKOTA SATURDAY. EXPECT CONTINUED CHANCE OF RAIN WITH THE EXITING TROF ALONG WITH FAIRLY COOL TEMPERATURES. HAVE LOWERED TEMPS FOR FRIDAY AND SATURDAY SLIGHTLY TO REFLECT THIS TREND. UPPER RIDGE FOLLOWS FOR SUNDAY AND MONDAY WITH SURFACE FRONTAL PASSAGE SOMETIME MONDAY OR TUESDAY. EXPECT WARMER TEMPERATURES EARLY NEXT WEEK AND INTRODUCED SOME POPS IN THE SOUTHWEST FOR MONDAY AND ACROSS THE ENTIRE AREA FOR TUESDAY. EBERT && .AVIATION... MVFR CEILINGS WILL REMAIN STEADFAST ACROSS THE TAF SITES THROUGH MOST OF THE DAY ON WEDNESDAY WITH OCCASIONAL IFR CONDITIONS DEVELOPING OVERNIGHT. STEADY RAIN WITH SHOWERS ACROSS THE WEST WILL SLOWLY SPREAD EASTWARD THIS EVENING WITH SOME VISIBILITIES REDUCED TO 3 SM. WINDS ACROSS THE REGION WILL GRADUALLY BACK OVERNIGHT AS LOW PRESSURE EXITS THE DAKOTAS. MCZ && .GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 314 PM MDT TUE MAY 22 2007 MTZ017-022-023-232115- CENTRAL AND SOUTHERN VALLEY-GARFIELD-MCCONE- 314 PM MDT TUE MAY 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT LAKE WIND ADVISORY EXTENDED TO 9 PM TONIGHT. WINDS SHOULD DECREASE THIS EVENING BELOW WIND CRITERIA. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY WINDS AROUND FORT PECK LAKE ON WEDNESDAY MAY BE HIGH ENOUGH FOR ANOTHER LAKE WIND ADVISORY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ016-018>021-024>027-059>062-232115- CENTRAL AND SOUTHEAST PHILLIPS-DANIELS-SHERIDAN-WESTERN ROOSEVELT- PETROLEUM-RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS- SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT- 314 PM MDT TUE MAY 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. TLSJR
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Tallow Creek was out of its banks in several locations and was flowing over Content Road in spots.
Timber and Square Creek were out of their banks or nearly so. Low lying areas near Brazil Creek (just west of Glasgow) had significant ponding of water with some outbuildings affected.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2007Every state in 2007This day in weather historyWarnings in Montana, May 2007
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: 34297, 34300.