2 flash flood, as filed by the National Weather Service.
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.
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 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 Tulsa, OK wrote its last area forecast discussion before the first event at Aug 12, 6:40 AM CST, 50 minutes earlier.
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 740 AM CDT SUN AUG 12 2001 SENT UPDATE TO ADD POPS TO ZONES SOUTH AND SOUTHWEST OF TUL WHERE PERSISTENT CONVECTION HAS BEEN OCCURRING. LEFT TEMPS AND SKY CONDITION ALONE FOR NOW. FCSTID = 23 .TSA... AR...NONE. OK...NONE.
ARZ001-002-010-011-019-020-029-OKZ049-053>076-131100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT SUN AUG 12 2001 ...SCATTERED THUNDERSTORMS FORECAST TODAY... AN UPPER LEVEL WEATHER SYSTEM MOVING SOUTHEAST FROM KANSAS AND NORTHWEST OKLAHOMA HAS HELPED PRODUCE SCATTERED THUNDERSTORMS THIS MORNING. THIS WEATHER SYSTEM WILL CONTINUE TO MOVE SOUTHEAST ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY...AND SCATTERED THUNDERSTORMS ARE ALSO EXPECTED TO CONTINUE. THUNDERSTORM CHANCES WILL DECREASE THIS MORNING ACROSS NORTHEAST OKLAHOMA BEHIND THE UPPER LEVEL SYSTEM. THE CHANCE FOR THUNDERSTORMS WILL CONTINUE INTO THE EVENING HOURS ACROSS SOUTHEAST OKLAHOMA. .SPOTTER ACTIVATION... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. .DISCUSSION... SCATTERED THUNDERSTORMS CONTINUED TO DEVELOP JUST AHEAD OF A SHORTWAVE THAT WAS MOVING SOUTHEAST ACROSS NORTHEAST OKLAHOMA EARLY THIS MORNING. A FEW OF THE STORMS TODAY COULD PRODUCE WIND GUSTS UP TO 50 MPH AND PEA SIZE HAIL...BUT THE LACK OF A SIGNIFICANT SURFACE BOUNDARY AND A LACK OF STRONG INSTABILITY SHOULD LIMIT THE SEVERE POTENTIAL TODAY AND TONIGHT. THREAT TABLE VALID THROUGH 1100 UTC MON AUG 13 THREAT AREA 1...SOUTH OF A LINE FROM OKEMAH TO BENTONVILLE THUNDERSTORM PROBABILITY...100 SEVERE WEATHER PROBABILITY IF STORMS OCCUR...20 SIGNIFICANT SEVERE WEATHER PROBABILITY IF STORMS OCCUR...15 THREAT AREAS DEFINE THE GREATEST RISK. PROBABILITIES ARE IN PERCENT. SIGNIFICANT SEVERE IS DEFINED AS F1 OR GREATER WIND/TORNADO DAMAGE AND/OR GOLF BALL OR LARGER SIZE HAIL. .OTHER HAZARDS... EXCESSIVE RAINS WILL BE POSSIBLE IN AREAS NEAR SLOW-MOVING THUNDERSTORMS. DETAILED FORECASTS AND A GRAPHICAL VERSION OF THIS OUTLOOK CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
The Tulsa radar (KINX), 69 km away, was scanning. The volume nearest the first event began at 13:31 UTC.
2 flash flood. Local standard time, as filed.
Heavy thunderstorm rains caused police to close Frisco Road due to high water.
Heavy thunderstorm rains caused Walnut Creek to flow out of its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2001Every state in 2001This day in weather historyWarnings in Oklahoma, August 2001
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: 5264886, 5264887.