Montana, 1999

Tornado and Hail in Montana, August 14, 1999

August 14, 1999 · NWS GGW · 10 events in 2 counties and zones

6 hail, 3 thunderstorm wind, 1 tornado, 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

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), 155 km away, was scanning. The volume nearest the first event began at 00:35 UTC.

Open the radar archive at this moment

Event by event

6 hail, 3 thunderstorm wind, 1 tornado. Local standard time, as filed.

Hail, Petroleum

When
August 14, 5:35 PM MST
Where
Petroleum County, 30 mi N of Winnett
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
47.430, -108.350

Hail, Petroleum

When
August 14, 6:50 PM MST
Where
Petroleum County, 18 mi NNE of Teigen
Measured
2 in hail
Reported by
LAW ENFORCEMENT
Coordinates
47.270, -108.430

Hail, Garfield

When
August 14, 7:00 PM MST
Where
Garfield County, 10 mi W of Brusett
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
47.350, -107.470

Hail, Petroleum

When
August 14, 7:10 PM MST
Where
Petroleum County, 15 mi N of Winnett
Measured
0.88 in hail
Reported by
GENERAL PUBLIC
Coordinates
47.220, -108.350

Tornado, Garfield

When
August 14, 8:00 PM MST
Where
Garfield County, 18 mi NW of Sand Spgs
Rating
F0
Path length
0.2 mi
Path width
50 yd
Reported by
LAW ENFORCEMENT
Coordinates
47.280, -107.750

Thunderstorm Wind, Petroleum

When
August 14, 8:10 PM MST
Where
Petroleum County, 22 mi N of Winnett
Measured
55 kt (63 mph)
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
47.320, -108.350

Hail, Garfield

When
August 14, 8:14 PM MST
Where
Garfield County, 10 mi W of Brusett
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
47.350, -107.470

Hail, Garfield

When
August 14, 9:15 PM MST
Where
Garfield County, 10 mi W of Jordan
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
47.320, -107.100

Thunderstorm Wind, Garfield

When
August 14, 9:37 PM MST
Where
Garfield County, Jordan
Measured
57 kt (66 mph)
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
47.320, -106.880

Thunderstorm Wind, Petroleum

When
August 14, 10:30 PM MST
Where
Petroleum County, 22 mi N of Winnett
Measured
63 kt (72 mph)
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
47.320, -108.350

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
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

More

Every storm in Montana in 1999Every state in 1999This day in weather historyThe tornado archive for Montana, 1999Warnings in Montana, August 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 2026-09-24. Each event’s entry at NCEI: 5709580, 5709581, 5709582, 5709583, 5709589, 5709584, 5709585, 5709586, 5709587, 5709588.