Montana, 1998

Flash Flood and Hail in Montana, June 23, 1998

June 23, 1998 · NWS GGW · 12 events in 6 counties and zones

11 hail, 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
$50,000
Crop damage
$25,000
Events
12

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 national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

11 hail, 1 flash flood. Local standard time, as filed.

Hail, Petroleum

When
June 23, 12:22 PM MST
Where
Petroleum County, 8 mi SE of Winnett
Measured
1 in hail
Coordinates
46.920, -108.230

Hail, Valley

When
June 23, 1:15 PM MST
Where
Valley County, 10 mi NW of Opheim
Measured
1 in hail
Coordinates
48.950, -106.550

Hail, Prairie

When
June 23, 5:18 PM MST to 5:30 PM MST
Where
Prairie County, 10 mi E of Fallon
Measured
0.88 in hail
Coordinates
46.830, -104.900

Hail, Roosevelt

When
June 23, 6:00 PM MST
Where
Roosevelt County, 10 mi E of Poplar
Measured
0.75 in hail
Coordinates
48.100, -104.980

Hail, Richland

When
June 23, 6:11 PM MST
Where
Richland County, Crane
Measured
1 in hail
Coordinates
47.570, -104.270

Hail, Daniels

When
June 23, 6:15 PM MST
Where
Daniels County, 12 mi N of Peerless
Measured
0.75 in hail
Coordinates
48.970, -105.820

Hail, Roosevelt

When
June 23, 6:22 PM MST
Where
Roosevelt County, 2 mi NE of Poplar
Measured
0.75 in hail
Coordinates
48.120, -105.170

Hail, Valley

When
June 23, 7:00 PM MST
Where
Valley County, Glasgow
Measured
0.75 in hail
Coordinates
48.200, -106.630

Hail, Roosevelt

When
June 23, 7:05 PM MST
Where
Roosevelt County, 1 mi W of Brockton
Measured
0.75 in hail
Coordinates
48.150, -104.930

Hail, Roosevelt

When
June 23, 7:25 PM MST
Where
Roosevelt County, Brockton
Measured
1.75 in hail
Coordinates
48.150, -104.920

Hail, Roosevelt

When
June 23, 7:37 PM MST
Where
Roosevelt County, Brockton
Measured
1 in hail
Coordinates
48.150, -104.920

Flash Flood, Roosevelt

When
June 23, 8:31 PM MST to 10:30 PM MST
Where
Roosevelt County, Brockton
Property damage
$50,000
Crop damage
$25,000
Coordinates
48.295, -105.016 (the zone’s center; the record gives no point)

Approximately 5 inches of rain fell in less than two hours over the Brockton area. Flash flooding caused propane tanks to float through town and portions of Hwy 2 were closed due to water covering the road. Several men had to be rescued from their car after it was swept off of the road in flood water.

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.

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

The same day elsewhere

More

Every storm in Montana in 1998Every state in 1998This day in weather historyWarnings in Montana, June 1998

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: 5640798, 5640799, 5640800, 5640801, 5640802, 5640803, 5640804, 5640805, 5640806, 5640807, 5640808, 5640809.