Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 340, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 15, 2001, 9:22 PM CDT for Haskell County, Oklahoma. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 15, 2001, 9:22 PM CDT (02:22 UTC)
- Expired
- Aug 15, 2001, 10:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Haskell County, OK
The radar
The Western Arkansas radar (KSRX), 70 km from the middle of the area, began a volume at 02:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2066 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1836 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
538 WUUS54 KTSA 160223 SVRTUL OKC061-160300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 922 PM CDT WED AUG 15 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HASKELL COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 1000 PM CDT * AT 922 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES EAST OF WHITEFIELD...MOVING EAST AT 40 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KEOTA... WHITEFIELD...MC CURTAIN AND STIGLER. WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3532 9528 3515 9528 3512 9493 3542 9490
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 15, 9:00 PM CDT, 22 minutes earlier.
Area forecast discussion, Aug 15, 9:00 PM CDT, 22 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 900 PM CDT WED AUG 15 2001 CONVECTION EXPECTED TO CONTINUR FROM NORTHWEST ARKANSAS TO SOUTHEAST OKLAHOMA ALONG AND AHEAD OF THE COLD FRONT MOVING THROUGH THE AREA. NEW MODELS NOT YET IN...BUT EXPECT FRONT TO SLOW AS IT GETS INTO SOUTHEAST OKLAHOMA. 18Z MESOETA INDICATED AN INCREASE IN PRECIPITATION OVER SOUTHEAST OKLAHOMA AFTER MIDNIGHT. THIS APPEARS REASONABLE AS CLOUD TOPS OVER OKFUSKEE AND HUGHES COUNTIES ARE COOLING. LOW LEVEL JET DOES NOT APPEAR ESPECIALLY STRONG...BUT IS APPARENTLY SUFFICIENT TO BE INCREASING THE CONVECTION. AIRMASS IS SOMEWHAT UNSTABLE WITH CAPES AROUND 1000-1500 J/KG IN THAT AREA...SO WILL MAINTAIN A CAREFUL WATCH. DO NOT EXPECT ANY SIGNIFICANT PRECIPITATION NORTHWEST OF THE CURRENT LINE OF CONVECTION...EXCEPT POSSIBLE SPRINKLES FROM REMAINS OF EARLIER STORMS. THERE IS CONSIDERABLE CLOUD TO GROUND LIGHTNING ASSOCIATED WITH THE COLDER CLOUD TOPS FROM CHEROKEE COUNTY TO PITTSBURG COUNTY AND SOUTHWEST. HOWEVER ISOLATED STRIKES ARE OCCURRING WELL BEHIND THE LINE...AS FAR BACK AS CLAREMORE IN THE LAST FEW MINUTES. LIGHTNING MAY BE THE GREATEST HAZARD FROM THESE STORMS IN THE NEAR TERM. WILL MAKE SOME ADJUSTMENTS TO POPS...BUT DO NOT ANTICIPATE ANY OTHER SIGNIFICANT CHANGES. FCSTID = 2 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, Aug 15, 5:44 PM CDT, 3 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
544 PM CDT WED AUG 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0505 PM MANNFORD OK 59 MPH TSTM GUST
08/15/01 CREEK PUBLIC REPORT.
0510 PM 5 W SAND SPGS OK 60 MPH TSTM GUST
08/15/01 TULSA MEDIA REPORT.Local storm report, Aug 15, 5:51 PM CDT, 3 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
551 PM CDT WED AUG 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0545 PM BROKEN ARROW OK 70 MPH TSTM GUST
08/15/01 TULSA REPORT FROM EOC.Local storm report, Aug 15, 6:26 PM CDT, 2 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
626 PM CDT WED AUG 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0550 PM 1 N BROKEN ARROW OK 60 MPH TSTM GUST
08/15/01 WAGONER INTERSECTION OF 40TH
ST. AND 196TH E. AVE.
PUBLIC REPORT.
0610 PM JENKS OK WIND DAMAGE
08/15/01 TULSA POWER POLE FELL ON A
DAYCARE CENTER. SPOTTER
REPORT.Special weather statement, Aug 15, 7:00 PM CDT, 2 hours 22 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-161100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 700 PM CDT WED AUG 15 2001 ...ISOLATED SEVERE THUNDERSTORMS STILL POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TONIGHT... STRONG TO SEVERE THUNDERSTORMS FORMED AHEAD OF THE COLD FRONT MOVING INTO EASTERN OKLAHOMA DURING THE LATE AFTERNOON. THUNDERSTORMS ARE EXPECTED TO CONTINUE ALONG AND AHEAD OF THE COLD FRONT AS IT MOVES TO THE SOUTHEAST. THE FRONT IS EXPECTED TO REACH A LINE FROM NEAR BERRYVILLE TO FORT SMITH TO MCALESTER BY AROUND MIDNIGHT. THE ATMOSPHERE IS MORE STABLE IN FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...SO THE GENERAL STRENGTH OF THUNDERSTORMS IS EXPECTED TO GRADUALLY DIMINISH. HOWEVER...ISOLATED SEVERE THUNDERSTORMS WILL STILL BE POSSIBLE DURING THE NIGHT. DAMAGING WINDS WILL BE THE MAIN THREAT FROM THE STORMS WITH THE THREAT HIGHEST IN NORTHEAST OKLAHOMA BETWEEN 5PM AND 9PM AND IN SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS AFTER 8PM. .SPOTTER ACTIVATION... SPOTTERS ACTIVATION MAY BE REQUIRED IN MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TONIGHT SOUTHEAST OF A LINE FROM GROVE TO JUST SOUTH OF TULSA TO BRISTOW. .DISCUSSION... THUNDERSTORMS MOVING ACROSS EASTERN OKLAHOMA ARE MOVING INTO MORE STABLE AIR IN FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. CAPE VALUES IN THOSE AREAS ARE ONLY AROUND 800 TO 1200...BASED ON 23Z DATA...WHICH IS CONSIDERABLY LOWER THAN THE 2000-3000 J/KG AIR THE THUNDERSTORMS ENCOUNTERED EARLIER THIS AFTERNOON. LOW LEVEL SOUTHERLY WINDS ARE EXPECTED TO INCREASE LATER IN THE NIGHT...WHICH WILL INCREASE THE THREAT OF SEVERE WEATHER LATER THIS EVENING AND AFTER MIDNIGHT. THREAT TABLE VALID THROUGH 1200 UTC THURSDAY AREA 1...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THUNDERSTORM PROBABILITY...100 SEVERE PROBABILITY IF STORMS OCCUR...30 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. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
Local storm report, Aug 15, 8:06 PM CDT, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
806 PM CDT WED AUG 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0515 PM TERLTON OK WIND DAMAGE
08/15/01 PAWNEE TREES AND POWER LINES
DOWN. REPORT FROM FIRE
DEPT.Local storm report, Aug 15, 9:12 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
912 PM CDT WED AUG 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0612 PM PRYOR OK WIND DAMAGE
08/15/01 MAYES TREES DOWN. EMERGENCY
MANAGER
0625 PM SALINA OK 60 MPH TSTM GUST
08/15/01 MAYES EMERGENCY MANAGERNearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.