Montana, 1999

Flash Flooding and Hail in Montana, June 20, 1999

June 20, 1999 · NWS GGW · 15 events in 4 counties and zones

12 hail, 2 flash flood, 1 funnel cloud, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 3 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$35,000
Crop damage
None recorded
Events
15

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 radar

The Glasgow radar (KGGW), 110 km away, was scanning. The volume nearest the first event began at 20:25 UTC.

Open the radar archive at this moment

Event by event

12 hail, 2 flash flood, 1 funnel cloud. Local standard time, as filed.

Hail, Roosevelt

When
June 20, 1:25 PM MST
Where
Roosevelt County, 28 mi N of Poplar
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
48.500, -105.200

Flash Flood, Roosevelt

When
June 20, 2:30 PM MST to 8:00 PM MST
Where
Roosevelt County, 4 mi N of Poplar
Property damage
$25,000
Reported by
EMERGENCY MANAGER
Coordinates
48.295, -105.016 (the zone’s center; the record gives no point)

Emergency Manager reported road closures in central Roosevelt county due to extremely heavy rain falling on already saturated soil. Up to 2 feet of water was reported over the North Poplar Road. Other secondary roads along the Poplar River and Smoke Creek were also closed due to high water.

Hail, Richland

When
June 20, 4:10 PM MST
Where
Richland County, 4 mi S of Crane
Measured
1.5 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.520, -104.270

Hail, Richland

When
June 20, 4:25 PM MST
Where
Richland County, 2 mi SW of Crane
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.550, -104.300

Hail, Richland

When
June 20, 4:38 PM MST
Where
Richland County, 4 mi N of Savage
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.500, -104.350

Hail, Dawson

When
June 20, 5:00 PM MST
Where
Dawson County, Glendive
Measured
1 in hail
Reported by
NWS EMPLOYEE(OFF DUTY)
Coordinates
47.100, -104.730

Funnel Cloud, Dawson

When
June 20, 5:05 PM MST to 5:15 PM MST
Where
Dawson County, 15 mi E of Glendive
Reported by
GENERAL PUBLIC
Coordinates
47.266, -104.899 (the zone’s center; the record gives no point)

Hail, Dawson

When
June 20, 5:19 PM MST
Where
Dawson County, Glendive
Measured
2 in hail
Reported by
GENERAL PUBLIC
Coordinates
47.100, -104.730

Hail, Dawson

When
June 20, 5:30 PM MST
Where
Dawson County, Glendive
Measured
4 in hail
Property damage
$10,000
Reported by
LAW ENFORCEMENT
Coordinates
47.100, -104.730

Hail, Dawson

When
June 20, 6:30 PM MST
Where
Dawson County, 1 mi E of Hodges
Measured
0.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
46.980, -104.380

Hail, Wibaux

When
June 20, 6:40 PM MST
Where
Wibaux County, 18 mi S of Wibaux
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.720, -104.180

Hail, Wibaux

When
June 20, 6:50 PM MST
Where
Wibaux County, 25 mi S of Wibaux
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.620, -104.180

Hail, Wibaux

When
June 20, 6:55 PM MST
Where
Wibaux County, 5 mi W of Wibaux
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.980, -104.280

Hail, Wibaux

When
June 20, 7:25 PM MST
Where
Wibaux County, 6 mi S of Wibaux
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
46.900, -104.180

Flash Flood, Wibaux

When
June 20, 9:00 PM MST to 11:00 PM MST
Where
Wibaux County, 15 mi S of Wibaux
Reported by
EMERGENCY MANAGER
Coordinates
46.965, -104.249 (the zone’s center; the record gives no point)

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Funnel Cloud
A rotating column of cloud extending from a thunderstorm that did not reach the ground.

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

The same day elsewhere

More

Every storm in Montana in 1999Every state in 1999This day in weather historyWarnings in Montana, June 1999

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 2026-09-30. Each event’s entry at NCEI: 5694593, 5694594, 5694595, 5694596, 5694597, 5694663, 5694671, 5694664, 5694665, 5694670, 5694666, 5694667, 5694668, 5694669, 5694672.