Montana, 2025

Flood and Hail in Montana, June 15, 2025

June 15, 2025 · NWS BYZ · 9 events in 6 counties and zones

This was the third day in a stretch of 4 days straight of severe storms across central and eastern MT. These storms caused damages resulting in a declaration of emergency for the state of Montana.

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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
9

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 happened

The episode as NWS BYZ wrote it up.

This was the third day in a stretch of 4 days straight of severe storms across central and eastern MT. These storms caused damages resulting in a declaration of emergency for the state of Montana.

The radar

The Billings radar (KBLX), 84 km away, was scanning. The volume nearest the first event began at 01:22 UTC.

Open the radar archive at this moment

Event by event

6 thunderstorm wind, 1 hail, 1 funnel cloud, 1 flood. Local standard time, as filed.

Hail, Musselshell

When
June 15, 6:20 PM MST
Where
Musselshell County, 9.42 mi NNW of Roundup Arpt
Measured
1 in hail
Reported by
Public
Coordinates
46.610, -108.590

One inch hail reported.

Funnel Cloud, Musselshell

When
June 15, 7:25 PM MST
Where
Musselshell County, 9.42 mi NNW of Roundup Arpt
Reported by
Public
Coordinates
46.610, -108.590

Corrects previous tornado report. Funnel cloud reported but no evidence of a confirmed touchdown.

Thunderstorm Wind, Rosebud

When
June 15, 8:00 PM MST
Where
Rosebud County, 18.1 mi WSW of Rock Spgs
Measured
52 kt (60 mph) measured gust
Reported by
Mesonet
Coordinates
46.700, -106.590

Mesonet station - Angela W.

Thunderstorm Wind, Big Horn

When
June 15, 8:35 PM MST
Where
Big Horn County, 3.21 mi WNW of Hardin
Measured
56 kt (64 mph) measured gust
Reported by
AWOS
Coordinates
45.750, -107.660

AWOS station 2 west northwest Hardin.

Thunderstorm Wind, Treasure

When
June 15, 8:40 PM MST
Where
Treasure County, 10.41 mi SSE of Bighorn
Measured
52 kt (60 mph) estimated gust
Reported by
Trained Spotter
Coordinates
46.040, -107.340

Fifty-two knot wind reported.

Thunderstorm Wind, Rosebud

When
June 15, 8:50 PM MST
Where
Rosebud County, 1.17 mi NW of Rock Spgs
Measured
50 kt (58 mph) measured gust
Reported by
Department of Highways
Coordinates
46.830, -106.270

Reported by weather station from dot.

Thunderstorm Wind, Custer

When
June 15, 9:12 PM MST
Where
Custer County, 0.48 mi W of Miles City Arpt
Measured
70 kt (81 mph) measured gust
Reported by
ASOS
Coordinates
46.430, -105.890

Reported by Miles City asos.

Flood, Custer

When
June 15, 9:52 PM MST to 10:52 PM MST
Where
Custer County, 0.84 mi NW of Miles City to 0.42 mi NNE of Miles City
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
46.410, -105.840

Widespread street flooding across the city. Lots of standing water under overpasses.

Thunderstorm Wind, Powder River

When
June 15, 10:30 PM MST
Where
Powder River County, 14.12 mi NNW of Olive
Measured
59 kt (68 mph) measured gust
Reported by
Mesonet
Coordinates
45.730, -105.590

Mesonet station Coalwood Mt-59 55.9.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Funnel Cloud
A rotating column of cloud extending from a thunderstorm that did not reach the ground.
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.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Montana in 2025Every state in 2025This day in weather historyWarnings in Montana, June 2025

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 2026-10-01. Each event’s entry at NCEI: 1279451, 1279450, 1279452, 1279453, 1279454, 1279455, 1279456, 1279449, 1279457.