Missouri, 1999

Damaging Winds in Missouri, August 12, 1999

August 12, 1999 · NWS LSX · 2 events in 1 county or zone

A fast moving severe thunderstorm downed hundreds of trees and caused other minor damage in the Hermann area. Local fire departments reported trees and power lines down in some cases blocking streets and roads.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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 LSX wrote it up.

A fast moving severe thunderstorm downed hundreds of trees and caused other minor damage in the Hermann area. Local fire departments reported trees and power lines down in some cases blocking streets and roads. Highways 19 and 100 were both blocked for a time due to downed trees. In the Dry Hill area just south of Hermann, several large trees were uprooted and billboards along Highway 19 were downed. A couple of small fires at homes were started by downed electric lines.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

2 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Gasconade

When
August 12, 10:40 PM CST
Where
Gasconade County, Hermann
Measured
60 kt (69 mph)
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
38.700, -91.430

Thunderstorm Wind, Gasconade

When
August 12, 10:40 PM CST
Where
Gasconade County, 1 mi S of Hermann
Measured
60 kt (69 mph)
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
38.680, -91.430

What these are

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 Missouri in 1999Every state in 1999This day in weather historyWarnings in Missouri, 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: 5718842, 5718843.