Montana, 2001

Flash Flood and Hail in Montana, July 14, 2001

July 14, 2001 · NWS GGW · 7 events in 2 counties and zones

5 hail, 1 thunderstorm wind, 1 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
$15,000
Events
7

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 Glasgow, MT wrote its last area forecast discussion before the first event at Jul 14, 1:15 PM MST, 27 minutes earlier.

Area forecast discussion, Jul 14, 1:15 PM MST, 27 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
215 PM MDT SAT JUL 14 2001

ACTIVITY FIRING OVER THE EASTERN CWFA THIS AFTERNOON WITH AN EXITING
SHORTWAVE. THIS IS HELPING TAKE THE 65+ DEW POINTS EAST INTO THE
DAKOTA/S...HOWEVER 55-65 DEW POINTS REMAIN OVER THE REMAINDER OF THE
AREA. VIS SAT SHOWS CU BUILDING UP OVER THE HIGHER TRRN OF WESTERN
MT. SKC FROM GGW-JDN WEST THIS AFTERNOON ALLOWING FOR MAX HEATING
OVER THIS AREA.

IN THE WATER VAP WATCHING TWO SHORTWAVES MOVING INTO MT. THE
STRONGER WAVE IS OVER NE NV AND NW UT MOVING NNE SHOWING SOME
DEVELOPMENT OVER ID. THE ETA CONTINUES TO TAKE THIS WAVE NORTHWARD.
THE SECOND WAVE COMES IN TWO PARTS...THE FIRST PART SHOULD STAY JUST
NORTH OF THE INTERNATIONAL BORDER...HOWEVER THE SECOND HALF IS
MOVING THROUGH EASTERN WA. THIS WAVE IS PROGGED TO CONTINUE EASTWARD
WITH TIME. THE ETA HAS IT INTO THE WESTERN CWFA BY 03Z. WILL
CONTINUE THE CHC FOR TSRA THIS EVENING ACROSS THE AREA. WITH MAX
HEATING AND STILL A JUICY LOW LEVELS...700MB TEMPS UNDER
10C...CONVECTION IS STILL A GOOD POSSIBILITY OVER THE REGION. FOR
SVR SHEAR PROFILES ARE A BIT BETTER LOOKING AT THE 18Z
SOUNDING...HOWEVER BEST FORCING DOESN/T MOVE IN UNTIL SUNDAY AND
MONDAY. WILL NOT ADD SVR IN THE ZONES FOR THIS EVENING.

TONIGHT...DO NOT EXPECT ANY FOG SUNDAY MORNING...OUTSIDE OF RIVER
BOTTOMS IN MISSOURI AND MILK VALLEYS. FOR SUNDAY...ANOTHER DAY OF
SOUTHWEST FLOW AND SHORTWAVES...MAKES FOR SCT PM TSRA. MONDAY MORE
OF THE SAME.

ONLY CHANGE WILL BE TO TWEAK TEMPS DOWN SOME...WE SEEM TO BE
REACHING INTO THE MID TO UPPER 80S AREA WIDE. HAVEN/T BEEN ABLE TO
BREAK THE 90 MARK AS OF YET. WILL FORECAST TEMPS TOWARDS THE CURRENT
TRENDS ACROSS THE CWFA                  PROTON

EXTENDED...A STRONG UPPER LEVEL RIDGE REMAINS IN PLACE OVER THE
UPPER MIDWEST THROUGH FRIDAY WITH A DEEP TROUGH SITUATED ALONG THE
WEST COAST. THE UPPER TROUGH THEN EDGES INTO NORTHEAST MONTANA
SATURDAY AS AN UPPER LOW SLOWLY MOVES EAST ACROSS NORTHERN CANADA.
WILL KEEP CHANCE THUNDERSTORMS IN EACH DAY UNDER THIS FAST SOUTHWEST
FLOW ALOFT PATTERN. MODELS BRING A COLD FRONT THROUGH THE REGION
LATE WEDNESDAY FOR SLIGHTLY COOLER TEMPERATURES THURSDAY.  WATERHOUSE

KGGW 062/085 062/085 062/087 062/087 060/083 058/083 058/083
     TTTTTTT  943333/9933333
KGDV 062/088 062/088 062/089 062/089 060/084 059/084 059/084  5
     TTTTTTT  943333/9933333

.GGW...NONE.

The radar

The Glasgow radar (KGGW), 179 km away, was scanning. The volume nearest the first event began at 20:41 UTC.

Open the radar archive at this moment

Event by event

5 hail, 1 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Hail, Richland

When
July 14, 1:42 PM MST
Where
Richland County, 10 mi NW of Sidney
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.800, -104.300

Hail, Garfield

When
July 14, 4:52 PM MST
Where
Garfield County, 12 mi W of Cohagen
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.033, -106.850

Hail, Garfield

When
July 14, 5:57 PM MST
Where
Garfield County, 7 mi SE of Cohagen
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.967, -106.500

Hail, Garfield

When
July 14, 6:20 PM MST
Where
Garfield County, 14 mi SE of Cohagen
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.883, -106.383

Hail, Garfield

When
July 14, 6:50 PM MST
Where
Garfield County, 20 mi SE of Cohagen
Measured
1.25 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.833, -106.300

Thunderstorm Wind, Garfield

When
July 14, 6:50 PM MST
Where
Garfield County, 20 mi SE of Cohagen
Measured
52 kt (60 mph)
Reported by
TRAINED SPOTTER
Coordinates
46.833, -106.300

Flash Flood, Garfield

When
July 14, 7:00 PM MST to 9:30 PM MST
Where
Garfield County, Southeast Portion
Crop damage
$15,000
Reported by
TRAINED SPOTTER
Coordinates
47.278, -106.993 (the zone’s center; the record gives no point)

Heavy rainfall, at rates of one to three inches an hour, washed through several fields, causing significant crop damage. It also topped over numerous gravel roads in the extreme southeast corner of Garfield County.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

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: 5262166, 5261485, 5261486, 5261487, 5261488, 5261489, 5261490.