1 thunderstorm wind, as filed by the National Weather Service.
Every event with a place to put it. 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 Apr 10, 3:34 AM CST, 3 hours 51 minutes earlier.
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 340 AM CDT TUE APR 10 2001 IN THE NEAR TERM...CONVECTION CONTINUES ALONG THE COOL SIDE OF THE BOUNDARY IN SE KS. ACTIVITY MAY ATTEMPT TO BUILD WWD ALONG THE FRONT...BUT BULK OF CONVECTION WILL DRIFT N. NOT MUCH OF A CAP TODAY AS SHORT RANGE MODELS SHOW H7 TEMPS COOLING SLIGHTLY DURING THE AFTERNOON. DESPITE THE LACK OF A CAP...MODEL QPFS CONTINUE TO LOOK OVERDONE OVER ERN OK...ALTHO ANY OUTFLOW BOUNDARY WORKING S FROM CONVECTION OVER SE KS WOULD PROVIDE THE NECESSARY FOCUS. WILL KEEP LOW POPS IN (MUCH LOWER THAN WHAT FWC SUGGESTS)...WITH SLIGHTLY HIGHER POPS IN NE OK. FORECAST IS A BIT MORE DIFFICULT TONIGHT AS ETA/AVN/NGM ALL DIFFER ON EVENTUAL TRACK OF STRONG UPPER LOW CURRENTLY OVER SRN CA. AVN/NGM TRACK IS CONSIDERABLY FARTHER N THAN ETA...AND IS QUITE SIMILAR TO TRACK OF UPPER SYSTEM THIS PAST FRIDAY. WITH FRIDAYS SYSTEM...THE CAP HAD A CHANCE TO REBUILD ACROSS THE AREA AND CONVECTION WEAKENED AND DIED BEFORE REACHING ERN OK. ETA SUGGESTS A FARTHER S TRACK...BRINGING UPPER LOW INTO INTO SWRN KS LATE TUESDAY NIGHT...WHICH WOULD BE MORE FAVORABLE FOR SUSTAINED CONVECTION FARTHER E AND S. WILL FAVOR A BLEND OF THE ETA/AVN FOR NOW. APPROACH OF UPPER SYSTEM WILL RESULT IN STRENGTHENING LOW-MID LEVEL WINDS...WITH ETA SHOWING 60-70 KT H85 JET OVER ERN OK AFT 06Z. APPEARS THAT CAP WILL REBUILD ACROSS THE REGION DURING THE EVENING...AS WARMER H7 AIR ADVECTS NEWD FROM TX. CONVECTION IS EXPECTED TO FIRE ALONG DRULINE FROM SWRN KS INTO ERN TX PANHANDLE BY LATE AFTERNOON. NEAR LINEAR NATURE OF STRONG LOW TO MID LEVEL WINDS SUGGESTS ACTIVITY WILL DEVELOP INTO A SQUALL LINE...MOVE INTO ERN OK LATE TUESDAY NIGHT AND EXIT NW AR BY LATE MORNING/EARLY AFTERNOON WEDNESDAY. GIVEN STRENGTH OF LOW-LEVEL FLOW...SOME DAMAGING WINDS GUSTS WILL BE POSSIBLE WITH THIS LINE. DRIER AIR AND MORE SEASONABLE TEMPS ARRIVE FOR LATER WEDNESDAY INTO THU. WILL NEED TO KEEP AN EYE ON WINDS WEDNESDAY AS THEY SHOULD REACH ADVISORY CRITERIA. AVN BRINGS WEAK SURFACE SYSTEM ACROSS OK THURSDAY NIGHT INTO FRIDAY. LOOKS AS THOUGH MOISTURE WON'T HAVE A CHANCE TO RETURN...WITH THE POSSIBLE EXCEPTION OF FAR SE OK. PLAN ON REMOVING POPS FOR FRIDAY. REMAINDER OF EXTENDED AS IS. FCSTID = 18 PRELIM NUMBERS... TUL 82 65 74 51 / 30 60 30 0 FSM 82 66 78 52 / 20 30 40 0 MLC 83 66 76 53 / 20 40 30 0 BVO 82 63 73 50 / 30 60 30 0 FYV 80 66 72 48 / 20 30 40 0 BYV 80 66 72 48 / 20 30 40 0 MIO 82 64 72 50 / 30 40 40 0& MKO 82 65 74 51 / 30 60 30 0 F10 82 65 74 51 / 30 60 30 0 HHW 83 66 76 55 / 10 30 30 0 .TSA... AR...NONE. OK...NONE.
ARZ001-002-010-011-019-020-029-OKZ049-053>076-111100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT TUE APR 10 2001 ...ISOLATED THUNDERSTORMS POSSIBLE THIS AFTERNOON AND TONIGHT... ...FEW SEVERE THUNDERSTORMS POSSIBLE BY EARLY WEDNESDAY MORNING... A WARM FRONTAL BOUNDARY EXTENDED ACROSS SOUTHERN KANSAS INTO CENTRAL MISSOURI EARLY THIS MORNING....WHILE A SURFACE DRYLINE STRETCHED FROM THE WESTERN OKLAHOMA PANHANDLE INTO WEST TEXAS. THE FRONTAL BOUNDARY WILL LIFT NORTH TODAY...AS AN UPPER LEVEL STORM SYSTEM APPROACHES FROM THE SOUTHWEST. ISOLATED THUNDERSTORMS WILL BE POSSIBLE TODAY ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS... MAINLY NORTH OF A MUSKOGEE TO FAYETTEVILLE LINE. ANY THUNDERSTORMS THAT FORM THIS AFTERNOON ARE EXPECTED TO REMAIN BELOW SEVERE LIMITS. AS THE STRONG UPPER LEVEL STORM SYSTEM APPROACHES TONIGHT... THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS WESTERN OKLAHOMA AND ORGANIZE INTO A SQUALL LINE. UPPER LEVEL WIND PROFILES SUGGEST THAT DAMAGING WINDS WILL BE POSSIBLE AS THE SQUALL LINE APPROACHES EASTERN OKLAHOMA...MAINLY AFTER MIDNIGHT. .SPOTTER ACTIVATION... SPOTTER GROUPS...EMERGENCY MANAGERS AND OTHER INTERESTED PARTIES SHOULD MONITOR THE LATEST FORECASTS AND LOOK FOR UPDATED HAZARDOUS WEATHER OUTLOOKS ISSUED BY THE TULSA NATIONAL WEATHER SERVICE. SPOTTER ACTIVATION MAY BE REQUIRED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS AFTER MIDNIGHT. .DISCUSSION... ISOLATED THUNDERSTORMS MAY DEVELOP THIS AFTERNOON ACROSS MAINLY NORTHEAST OKLAHOMA. THE AIRMASS REMAINS SLIGHTLY CAPPED...WHICH WILL LIMIT CONVECTION DEVELOPING TODAY. HOWEVER...EARLY MORNING STORMS ACROSS SOUTHEAST KANSAS AND SOUTHERN MISSOURI MAY LEAVE OUTFLOW BOUNDARIES...WHICH WOULD BE A FOCUS FOR CONVECTION ACROSS NORTHEAST OKLAHOMA. SURFACE INSTABILITY WILL INCREASE THROUGH THE DAY...WITH LIFTED INDEX VALUES RANGING FROM -3 TO -5...AND SURFACE CAPE VALUES RANGING FROM 1000 TO 2000 J/KG. ANY STORMS WHICH DO FORM TODAY ARE EXPECTED TO REMAIN BELOW SEVERE LIMITS. A POWERFUL UPPER LEVEL STORM SYSTEM WILL APPROACH THE AREA TONIGHT. AS IT DOES...A SURFACE LOW PRESSURE WILL DEVELOP ACROSS EASTERN COLORADO...AND SOUTHERLY WINDS WILL INCREASE ACROSS THE AREA. MID LEVEL COOLING IS EXPECTED TO TAKE PLACE THIS AFTERNOON AND TONIGHT... WHICH WILL WEAKEN THE CAP. STRONG UPPER DIVERGENCE ASSOCIATED WITH THE LEFT EXIT REGION OF A 120 KNOT JET WILL DEVELOP BY TONIGHT ACROSS EASTERN OKLAHOMA...AND A 70 KNOT JET WILL DEVELOP AT 850MB. STORMS WILL LIKELY INITIATE ALONG THE DRYLINE LATE TODAY...AND RACE TOWARD EASTERN OKLAHOMA. UPPER LEVEL WIND PROFILES SHOW UNIDIRECTIONAL SHEAR WHICH SUGGEST THAT A SQUALL LINE WILL DEVELOP... WITH DAMAGING WINDS POSING THE MAIN THREAT. IF THE SYSTEM TAKES A MORE NORTHERLY TRACK...UPPER LEVEL DYNAMICS WOULD NOT BE AS FAVORABLE FOR A SEVERE SQUALL LINE REACHING EASTERN OKLAHOMA. IT DOES APPEAR LIKELY THAT SHOWERS AND THUNDERSTORMS WILL AFFECT MUCH OF EASTERN OKLAHOMA BY EARLY WEDNESDAY MORNING...AND NORTHWEST ARKANSAS AFTER 6 AM. THREAT TABLE VALID THROUGH 1200 UTC WEDNESDAY AREA 1...WEST OF A BARTLESVILLE TO TULSA TO MCALESTER LINE THUNDERSTORM PROBABILITY...70 SEVERE PROBABILITY IF STORMS OCCUR...40 SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...10 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 SIZE HAIL OR LARGER. .OTHER HAZARDS... A VERY HIGH FIRE DANGER WILL CONTINUE TODAY ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. SEE THE LATEST FIRE DANGER STATEMENT /OKCFWMTUL/ FOR FURTHER DETAILS. ADDITIONAL WEATHER INFORMATION...INCLUDING RELATED GRAPHICS CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA. AN UPDATED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AROUND 1 PM TODAY. & SJT
The Tulsa radar (KINX), 79 km away, was scanning. The volume nearest the first event began at 13:24 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds estimated in excess of 60 mile an hour blew off parts of the roof of the Afton elementary school. The winds also blew the roof off several outbuildings.
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, April 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: 5241516.