Montana, 1999Damaging Winds in Montana, June 18, 1999
June 18, 1999 · NWS BYZ · 5 events in 4 counties and zones
4 thunderstorm wind, 1 funnel cloud, as filed by the National Weather Service.
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
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- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
Open the live radar over this ground
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 5
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.
Thunderstorm Wind, Wheatland
- When
- June 18, 7:12 PM MST
- Where
- Wheatland County, Harlowton
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.430, -109.820
Spotter estimated 60 mph wind gust. Some power lines were downed in Harlowton and in Shawmut.
Thunderstorm Wind, Golden Valley
- When
- June 18, 7:40 PM MST
- Where
- Golden Valley County, Ryegate
- Measured
- 61 kt (70 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.300, -109.250
Spotter estimated wind gust of 70 mph. Several large branches were downed in Ryegate.
Funnel Cloud, Musselshell
- When
- June 18, 7:45 PM MST
- Where
- Musselshell County, 20 mi S of Roundup
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.497, -108.398 (the zone’s center; the record gives no point)
Thunderstorm Wind, Musselshell
- When
- June 18, 8:20 PM MST to 8:30 PM MST
- Where
- Musselshell County, Roundup
- Measured
- 56 kt (64 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 46.450, -108.530
Musselshell County Sheriff reported 65 mph wind gusts. Several large tree branches and street signs were blown down.
Thunderstorm Wind, Yellowstone
- When
- June 18, 8:30 PM MST
- Where
- Yellowstone County, Billings
- Measured
- 52 kt (60 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 45.800, -108.480
Montana State Highway Patrol estimated 60 mph wind gusts in Billings
- 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.
- 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.
- Rip Current in California, June 18, 19991 death · 1 event
- Flash Flood in Florida, June 18, 1999$500,000 · 1 event
- Tornadoes and Hail in Kansas, June 18, 1999$11,000 · F1 · 17 events
- Hail and Damaging Wind in Texas, June 18, 19991.75 in hail · 6 events
- Tornadoes and Hail in Oklahoma, June 18, 1999F0 · 5 events
- Hail in Oklahoma, June 18, 19992.75 in hail · 4 events
- Hail in Nebraska, June 18, 19990.88 in hail · 2 events
- Lightning Strike in Florida, June 18, 1999$1,000 · 1 event
- Flood in Montana, June 18 to 26, 19991 event
- Waterspout in South Carolina, June 18, 19991 event
- Waterspout in Florida, June 18, 19991 event
- Tornado in Montana, June 18, 1999F0 · 1 event
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: 5698325, 5698326, 5698329, 5698327, 5698328.