Flash Flood, Crook
- When
- June 30, 6:00 AM MST to 8:00 AM MST
- Where
- Crook County, 35 mi N of Sundance
- Measured
- 8
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 44.589, -104.570 (the zone’s center; the record gives no point)
Flash Flood in Wyoming, June 30, 2001
Locally heavy rain from thunderstorms overnight produced a flash flood on the Little Missouri River at Government Canyon. A road was washed out and eight feet of water was covering the roadway.
Where it happened
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
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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 UNR wrote it up.
Locally heavy rain from thunderstorms overnight produced a flash flood on the Little Missouri River at Government Canyon. A road was washed out and eight feet of water was covering the roadway.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Rapid City, SD wrote its last area forecast discussion before the first event at Jun 30, 1:45 AM MST, 4 hours 15 minutes earlier.
Area forecast discussion, Jun 30, 1:45 AM MST, 4 hours 15 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 245 AM MDT SAT JUN 30 2001 DISCUSSION DELAYED DUE TO ONGOING SEVERE WEATHER. .UNR...NONE. RICHARDS
In the hours before
Local storm report, Jun 30, 5:52 AM MST, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
652 AM MDT SAT JUN 30 2001
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0130 AM 16 N HULETT WY 1 INCH HAIL
06/30/01 CROOK REPORTED BY STORM
SPOTTER. ALSO HAD 1.75
INCHES OF RAIN
%The radar
The Rapid City radar (KUDX), 148 km away, was scanning. The volume nearest the first event began at 13:00 UTC.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Lightning Strike in New Jersey, June 30, 2001
- Lightning Strike in New York, June 30, 2001
- Lightning Strike in Pennsylvania, June 30, 2001
- Tornado and Hail in Massachusetts, June 30, 2001
- Hail and Damaging Winds in Massachusetts, June 30, 2001
- Damaging Wind in Connecticut, June 30, 2001
- Flood and Hail in Oklahoma, June 30, 2001
- Damaging Wind in New York, June 30, 2001
- Damaging Wind in Florida, June 30, 2001
- Hail in Nebraska, June 30, 2001
- Hail in Nebraska, June 30, 2001
- Wildfire in California, June 30, 2001
More
Every storm in Wyoming in 2001Every state in 2001This day in weather historyWarnings in Wyoming, June 2001
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: 5253929.