Thunderstorm Wind, Judith Basin
- When
- July 28, 2:15 PM MST
- Where
- Judith Basin County, Geyser
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 47.250, -110.500
Actual spotter location Geyser 1 E.
Damaging Wind in Montana, July 28, 2001
1 thunderstorm wind, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What forecasters said that day
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 Great Falls, MT wrote its last area forecast discussion before the first event at Jul 28, 1:45 PM MST, 30 minutes earlier.
Area forecast discussion, Jul 28, 1:45 PM MST, 30 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 245 PM MDT SAT JUL 28 2001 STRONG NEGATIVELY-TILTED UPPER LEVEL TROUGH SWINGING INTO NORTHERN IDAHO/WESTERN MT THIS AFTERNOON. TROUGH WILL QUICKLY SWEEP ACROSS NRN MT AND INTO SRN SASK TONIGHT AS IT ENCOUNTERS STRONG UPPER RIDGE OVER GREAT PLAINS. ASSOCIATED COLD FRONT WILL LIKEWISE RAPIDLY MOVE ACROSS STATE. DIFFLUENT FLOW ALOFT AHEAD OF TROUGH TOGETHER WITH FRONT LEFT QUADRANT OF UPPER JET OVER CENTRAL MONTANA THIS EVENING WILL ENHANCE UPWARD VERTICAL MOTION NE HALF OF GTF CWFA. PRE-FRONTAL SURFACE TROUGH OVER CENTRAL MONTANA PROVIDING FOCUS FOR CONVERGENCE. WARM...AND SLIGHTLY MOIST...SOUTHERLY FLOW OVER ERN MT WILL DESTABILIZE THE AIRMASS AHEAD OF COLD FRONT. MEANWHILE...COOL AIR BEHIND THE COLD FRONT WILL ENHANCE DOWNWARD MOTION RESULTING IN GOOD LOW-LEVEL CONVERGENCE ALONG FRONT...FURTHER ENHANCING THUNDERSTORM DEVELOPMENT. SPECIAL 18Z TFX SOUNDING SHOWS INVERTED-V CONFIGURATION INDICATIVE OF STRONG WINDS AND BELIEVE GREATEST THREAT WILL BE POSSIBILITY OF STRONG DOWNBURST WINDS. MOST UNSTABLE AIR WILL BE OVER EASTERN PORTION OF GTF CWFA...18Z GGW SOUNDING SHOWS GOOD VERTICAL SHEAR AND INSTABILITY. THEREFORE EXPECT BEST CHANCE FOR SEVERE WEATHER THIS AREA AND AM CONCERNED WITH POSSIBILITY OF SUPERCELL DEVELOPMENT... PRIMARILY OVER BLAINE AND FERGUS COUNTIES. SPC HAS THIS PORTION OF GTF CWFA UNDER SLIGHT RISK OF SEVERE THUNDERSTORMS WHICH SEEMS REASONABLE CONSIDERING CIRCUMSTANCES. RAPID SCAN WILL COMMENCE AT 21Z AND EXPECT WATCH TO BE FORTHCOMING. BEHIND THE FRONT...DAYTIME HIGH TEMPERATURES COOL 10 TO 15 DEGREES SUNDAY AND THEN CHANGE LITTLE MONDAY. EXTENDED DISCUSSION...MODELS ARE IS BASIC AGREEMENT IN THE OVERALL PATTERN KEEPING THE RIDGE OVER THE CENTRAL PLAINS AND GENERAL TROUGHING OVER THE PACIFIC NORTHWEST. THIS WILL KEEP THE AREA IN THE PERSISTENT SOUTHWEST FLOW. DAY 3 LOOKS UNSETTLED ACROSS THE AREA AS UPPER LEVEL ENERGY SWINGS THROUGH BUT PATTERN FAVORS A DRIER SCENARIO FOR DAYS 4 AND 5. HOWEVER...THE CHANCE OF AFTERNOON CONVECTION CAN NOT BE RULED OUT. THE PATTERN RETURNS TO A MORE FAVORABLE FLOW ON DAYS 6 AND 7 FOR A BETTER CHANCE OF SHOWERS AND THUNDERSTORMS. FEEL THE BEST SOLUTION WILL BE TO BROAD-BRUSH THE AREA FOR THE ENTIRE PERIOD...PRETTY MUCH WHAT THE GOING FORECAST IS NOW. TEMPS WILL BE FAIRLY CONSISTENT REGION WIDE. GOUDSWARD GTF BB 050/076 047/076 045 06300 CTB BB 050/072 045/070 044 06100 HLN BB 052/078 048/078 047 06211 BZN BB 044/078 042/076 044 06311 WEY BB 040/070 038/070 040 06200 DLN BB 043/075 042/075 044 06210 HVR BB 050/080 048/077 046 06611 2LWT BB 047/074 045/074 045 06611
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Nebraska, July 28 to 31, 2001
- Flash Flooding in Missouri, July 28 to 29, 2001
- Flash Flood in Missouri, July 28, 2001
- Damaging Wind in Missouri, July 28, 2001
- Damaging Winds in Arkansas, July 28, 2001
- Damaging Winds in Indiana, July 28, 2001
- Lightning Strike in Missouri, July 28, 2001
- Lightning Strike in Indiana, July 28, 2001
- Flash Flooding in Kentucky, July 28, 2001
- Hail and Damaging Winds in Montana, July 28, 2001
- Damaging Wind in Arizona, July 28, 2001
- Hail and Damaging Winds in Montana, July 28, 2001
More
Every storm in Montana in 2001Every state in 2001This day in weather historyWarnings in Montana, July 2001
Sources
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: 5260679.