Beaver Creek continues to flood, mainly due to snowmelt and some ice jamming.
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.
Beaver Creek continues to flood, mainly due to snowmelt and some ice jamming.
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 Apr 4, 3:15 AM MST, 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 415 AM MDT MON APR 4 2011 .SHORT TERM...FOR NORTHEAST MONTANA...TODAY THROUGH WEDNESDAY... THIS MORNING...A VERY NARROW TEMP/DEW POINT SPREAD THRU MOST OF THE CWA...NUMEROUS OBS SITES ALREADY 100 PCT. MODELS INDICATING LARGE AREA OF SURFACE RELATIVE HUMIDITY OVER 95 PCT. AIR JUST OFF SURFACE IS DRY THOUGH AND MOIST LAYER SHALLOW...SO EXPECT ONLY PATCHES OF SHORTLIVED FOG. SOME SIGNS OF THIS FROM TIME TO OVERNIGHT IN THE LOWER MILK AND LOWER MISSOURI RIVER VALLEYS ON SATELLITE FOG LOOP. OTHERWISE...WEAKENING SHORTWAVE UPPER RIDGE MOVING ACROSS THE AREA TODAY. MODEST WARMING OF THE AIRMASS WITH IT SHOULD BRING TEMPS INTO THE 40S FOR HIGHS. QUITE A BIT OF HIGH CLOUDINESS MOVING THRU THE RIDGE WITH JUST WEAK DYNAMICS THOUGH IN ANTICYCLONIC FLOW. RIDGE WEAKENS TUE WITH A LITTLE STRONGER SHORTWAVE SYSTEM MOVING THRU NE MT FROM THE W. MODELS SEEM A LITTLE TOO MOIST FOR THE PATTERN WHICH DOESN'T LOOK VERY WELL ORGANIZED. WILL GO WITH CHANCE POPS AND QPF UNDER 0.1. AS USUAL THIS TIME OF YEAR...PRECIP TYPE A QUESTION. NO SIGNIFICANT INVERSION...SO FREEZING RAIN CHANCES VERY SLIM. FORECAST SOUNDINGS LOOK FAIRLY STRAIGHTFORWARD WITH FREEZING LEVEL MOSTLY DETERMINING RAIN OR SNOW CHANCES. IN THE MORNING...EXPECT A NORTH TO SOUTH OF SNOW TO CHANCE OF RAIN TRANSITION FOR OUR CWA...AND BETWEEN THESE SOME OF EACH TYPE. AFTERNOON PRECIP IF ANY SHOULD BE MAINLY JUST RAIN. IN ANY CASE ACCUMS MINOR AND SHORTLIVED. NOT MUCH CHANGE IN THE AIRMASS WED IN FLAT W FLOW ALOFT WHICH SHOULD BRING SOME SUNSHINE WITHOUT ANY SIGNIFICANT SHORTWAVE UNTIL LATE AFTERNOON. PREFER TO KEEP ON SLOWER SIDE WITH THIS. SIMONSEN .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY... DEEP UPPER TROUGH DIGS INTO THE WESTERN U.S. BETWEEN THURSDAY AND SATURDAY. THIS WILL BRING WELL BELOW NORMAL TEMPERATURES TO THE FORECAST AREA THROUGH THE WEEKEND. GFS IS FASTER THAN THE ECMWF ON TIMING WITH A SYSTEM IN THE SOUTHWEST FLOW ALOFT AHEAD OF THE TROUGH FOR THURSDAY OR FRIDAY. BOTH MODELS ARE POINTING TOWARDS THE POTENTIAL OF SIGNIFICANT SNOW FOR PARTS OF NORTHEAST MONTANA FROM THE SYSTEM IF THE TEMPERATURES ARE COLD ENOUGH. THE PRECIP TYPE WILL BE GREATLY DEPENDENT ON THE TIME OF DAY...ELEVATION...AND LOCATION WITHIN THE SYSTEM. WILL GENERALLY MENTION A CHANCE OF MIXED RAIN AND SNOW WEDNESDAY NIGHT AND THURSDAY TRANSITIONING MOSTLY SNOW THURSDAY NIGHT. SURFACE HIGH BUILDS INTO THE AREA OVER THE WEEKEND WITH DRY AND COOL WEATHER INTO EARLY NEXT WEEK. FORRESTER && .AVIATION... VFR CONDITIONS WILL PREVAIL TODAY AND TONIGHT WITH INCREASING MID AND HIGH LEVEL CLOUDS. PATCHY FOG IS POSSIBLE FOR FOG ALONG THE RIVERS IN THE FORECAST AREA THIS MORNING. && .HYDROLOGY... WARMER TEMPERATURES ARE EXPECTED TO RETURN TO THE AREA TODAY AND ARE EXPECTED TO CONTINUE THROUGH THE WEEK. SNOWMELT RUNOFF THEREFORE WILL PICKUP IN EARNEST AND CAUSE FLOODING. A FLOOD ADVISORY IS IN EFFECT FOR THE BEAVER CREEK IN WESTERN VALLEY/EASTERN PHILLIPS COUNTIES. A FLOOD WARNING IS IN EFFECT FOR THE BIG MUDDY RIVER IN SHERIDAN COUNTY. A FLOOD WATCH REMAINS IN EFFECT FOR AREAL AND RIVER FLOODING POSSIBILITIES IN SOUTHERN AND CENTRAL VALLEY COUNTY THIS WEEK. PLEASE SEE THESE PRODUCTS FOR MORE INFORMATION. && .GLASGOW WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH FROM THIS EVENING THROUGH THURSDAY AFTERNOON FOR CENTRAL AND SOUTHERN VALLEY. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 241 PM MDT SUN APR 3 2011 MTZ016>020-059-061-062-041200- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- DANIELS-SHERIDAN-WESTERN ROOSEVELT-NORTHERN PHILLIPS- NORTHERN VALLEY-EASTERN ROOSEVELT- 241 PM MDT SUN APR 3 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TONIGHT FLOOD ADVISORIES ARE IN EFFECT FOR THE BEAVER CREEK IN WESTERN VALLEY/EASTERN PHILLIPS COUNTIES AND THE THE BIG MUDDY RIVER IN SHERIDAN COUNTY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY AS TEMPERATURES WARM BEHIND THE WEEKEND STORM...SNOW MELT OF NEW SNOW AS WELL AS THE EXISTING SNOW PACK WILL SEND ADDITIONAL WATER INTO AREA STREAMS...CREEKS...AND RIVERS CONTINUING THE FLOOD THREAT THROUGH THE WEEK. THEREFORE A FLOOD WATCH HAS BEEN ISSUED FOR AREAL FLOODING POSSIBILITIES IN SOUTHERN AND CENTRAL VALLEY COUNTY BEGINNING MONDAY NIGHT. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ021>027-060-041200- PETROLEUM-GARFIELD-MCCONE-RICHLAND-DAWSON-PRAIRIE-WIBAUX- SOUTHWEST PHILLIPS- 241 PM MDT SUN APR 3 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER EXPECTED .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY WARMER TEMPERATURES ARE EXPECTED TO RETURN TO THE AREA MONDAY AND ARE EXPECTED TO CONTINUE THROUGH THE WEEK. SNOWMELT RUNOFF THEREFORE WILL PICKUP AND COULD CAUSE RIVERS AND STREAMS TO RISE. .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.
2 flood. Local standard time, as filed.
USGS River gauges on the Beaver Creek reported flooding, with abundant flooding on the Saco Flats.
USGS river gauge west of Hinsdale reported a reading of 17.41. Spotters reporting the river to be high and running out of it's banks. On April 5th, the Antelope Creek was close to going over the Billingsley Road, west of Glasgow.
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, April 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: 307704, 307712.