1 tornado, as filed by the National Weather Service.
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 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 Jul 31, 1:30 PM MST, 41 minutes earlier.
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
230 PM MDT TUE JUL 31 2001
UPPER LOW TRACKING ACROSS MONTANA THIS AFTERNOON. CLOUDS...RAIN AND
THUNDERSTORMS ACROSS NORTHEAST CORNER OF STATE WITH DRY SLOT OVER
SOUTHERN MONTANA WEDGING TOWARD BLAINE COUNTY. MORE CLOUDS AND
SHOWERS OVER NORTH CENTRAL MONTANA IN WRAP AROUND. AS LOW LIFTS ENE
THIS EVENING EXPECT SOME DRYING OVER CWA WITH RAINS RETURNING MAINLY
OVER NORTHERN ZONES WITH WRAP AROUND. WILL KEEP HIGH POPS OVER
NORTHERN ZONES FOR TONIGHT BUT WILL LOWER POPS OVER SOUTHERN ZONES.
FOR THE REMAINDER OF SHORT TERM...ANOTHER TROF DIGGING INTO PACIFIC
NORTHWEST. MODELS INDICATING DRY SOUTHWEST FLOW INTO THE STATE WITH
WARM AIR PUMPING NORTHWARD. WEAK SHORTWAVE SLIDES ALONG CANADIAN
BORDER ON THURSDAY BUT NOT MUCH MOISTURE WITH IT. ALSO AVN MORE
AGRESSIVE WITH THIS WAVE THAN ETA. THUS WILL FORECAST DRY WITH A
WARMING TREND AFTER FOR WEDNESDAY AND THURSDAY. EBERT
EXTENDED...UPPER LEVEL RIDGE AXIS ON FRIDAY MORNING CENTERED
ALONG THE MONTANA/NORTH DAKOTA BORDER. BY LATE FRIDAY...UPPER LEVEL
RIDGE MOVES EAST OVER THE DAKOTAS WITH SOUTHWEST FLOW ALOFT OVER
NORTHEAST MONTANA. FRIDAY LOOKS TO BE THE WARMEST DAY OF THE
EXTENDED PERIOD WITH CWFA CLOSEST TO THE RIDGE AXIS. SLOW MOVING
SURFACE LOW DEVELOPS SATURDAY MORNING OVER CENTRAL MONTANA. SLIGHTLY
COOLER TEMPERATURES SLIDE IN FROM THE NORTH LATE SATURDAY BEHIND
WEAK COLD FRONT. SOUTHWEST FLOW ALOFT DOMINATES THROUGH SUNDAY.
RIDGE BEGINS TO AMPLIFY ON MONDAY AND TUESDAY...PUSHING MAJORITY OF
ENERGY TO THE WEST OVER IDAHO/WESTERN MONTANA. POHL
KGGW 051/081 062/088 064/094 058/086 057/084 058/092 059/090
BUTTTBB 906001/8733322
KGDV 055/082 061/091 064/095 058/088 058/084 059/093 061/089
BUTTTBB 903000/8733322The Glasgow radar (KGGW), 112 km away, was scanning. The volume nearest the first event began at 21:12 UTC.
1 tornado. Local standard time, as filed.
A tornado touched down in a rangeland area. No damage was caused. The tornado was on the ground for approximately 15 minutes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2001Every state in 2001This day in weather historyThe tornado archive for Montana, 2001Warnings in Montana, July 2001
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: 5261666.