Flooding in North Dakota, August 12, 1999

Name: Flooding in North Dakota, August 12, 1999
Start: 1999-08-12T00:00
End: 1999-08-12T11:50
Location: North Dakota

August 12, 1999 · NWS BIS · 2 events in 2 counties and zones

2 flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 2 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

Open the live radar over this ground

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.

The radar

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

Open the radar archive at this moment

Event by event

2 flood. Local standard time, as filed.

Flood, Burleigh

When: August 12, 12:00 AM CST to 11:50 AM CST
Where: Burleigh County, 20 mi W of Bismarck Arpt
Reported by: OFFICIAL NWS OBS.
Coordinates: 46.977, -100.469 (the zone’s center; the record gives no point)

Periods of heavy rainfall ranging from 4 to 7 inches saturated much of Morton and Burleigh counties. Hardest impact was felt in the cities of Bismarck and Mandan. Two hundred twenty one (221) homes and businesses received water damage. Twelve (12) road sites were damaged and a significant mudslide closed portions of highway 1804 in north Bismarck.

Flood, Morton

When: August 12, 12:00 AM CST to 11:50 AM CST
Where: Morton County, 17 mi W of Mandan
Reported by: OFFICIAL NWS OBS.
Coordinates: 46.716, -101.281 (the zone’s center; the record gives no point)

What these are

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

Every storm in North Dakota in 1999 Every state in 1999 This day in weather history Warnings in North Dakota, 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: 5710295, 5710296.