Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 23, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Feb 24, 2001, 10:02 AM CST for 4 counties in Oklahoma. It was in force for 58 min. 1 report came from 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, with what was reported inside it.
The facts
- Issued
- Feb 24, 2001, 10:02 AM CST (16:02 UTC)
- Expired
- Feb 24, 2001, 11:00 AM CST
- In force
- 58 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Creek County, OK, Osage County, OK, Tulsa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 65 km from the middle of the area, began a volume at 16:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 24, 10:35 AM CST | Hail 0.88 | Mannford, OK |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 4.0 hours before the alert went out and 155 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
- 170 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 452 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 544 m²/s²
- 0-3 km storm-relative helicity
- 578 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 241603 SVRTUL OKC037-113-143-147-241700- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1002 AM CST SAT FEB 24 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR NORTHERN CREEK COUNTY IN NORTHEAST OKLAHOMA SOUTHEASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA NORTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA WASHINGTON COUNTY IN NORTHEAST OKLAHOMA * UNTIL 1100 AM CST * AT 1002 AM CST SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO 60 MPH AND DIME SIZE HAIL WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES SOUTH OF MANNFORD TO 6 MILES NORTHWEST OF BRISTOW...MOVING NORTHEAST AT 45 MPH. * SOME LOCATIONS AFFECTED INCLUDE... MANNFORD...DEWEY...OCHELATA... RAMONA...VERA...BARTLESVILLE...COLLINSVILLE...SKIATOOK...SPERRY... SAND SPRINGS...BARNSDALL...WYNONA...AVANT AND HOMINY. LAT...LON 3653 9638 3584 9649 3621 9584 36/88 9581
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 Feb 24, 2:45 AM CST, 7 hours 17 minutes earlier.
Area forecast discussion, Feb 24, 2:45 AM CST, 7 hours 17 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 245 AM CST SAT FEB 24 2001 ACTIVE WX PATTERN TODAY. CONVECTION CONTINUES THIS MORNING OVER NE OK. FA HAS ALREADY RECEIVED WIDESPREAD 1-2 INCHES WILL SOME MESONET SITES APPROACHING 3 INCHES IN EAST-CENTRAL OK. WITH ADDITIONAL STRONG TO SEVERE STORMS EXPECTED TODAY WILL CONTINUE WITH FLASH FLOOD WATCH. GIVEN GROUND IS ALREADY SATURATED WITH LOW FFG VALUES...ANY ADDITIONAL PRECIP WILL CAUSE FLOODING PROBLEMS. STRONG PRESSURE GRADIENT AHEAD OF SFC LOW WILL ALSO PRODUCE STRONG SOUTHERLY WINDS...HIGH ENOUGH TO WARRANT WIND ADVISORY. STRONG TO SEVERE CONVECTION MOVING INTO WESTERN SECTIONS OF OK ATTM. TSTM LINE WILL CONTINUE MOVING EAST THIS MORNING AS UPPER LOW BECOME NEG TILTED OVER OK. IMPRESSIVE UVV'S FORECAST OVER AREA IN ASSOCIATION WITH 130 KT SPEED MAX ROTATING AROUND BASE OF UPPER TROUGH. EXPECT THUNDERSTORMS TO MOVE INTO FA BY MID MORNING... MOVING THROUGH REMAINDER OF AREA DURING THE AFTERNOON. MODERATE INSTABILITIES AXIS FORECAST ALONG PACIFIC FRONT/DRY LINE (1500-2000 J/KG) WITH SOME VEERING OF STRONG LOW LEVEL WIND PROFILE WILL LIKELY SUPPORT SVR LEWP WITH MAIN THREAT BEING LARGE HAIL/DAMAGING WINDS. ISOLATED TORNADOES HOWEVER NOT OUT OF THE QUESTION WITH ANY DEVIATING/MERGING CELLS WITHIN LINE. TSTMS WILL MOVE EAST OF FA BY LATE AFTERNOON/EARLY EVENING AND WILL ONLY CARRY SLIGHT CHANCE POPS NW ARK ZONES 2ND PERIOD. HIGH PRESSURE WILL BUILD INTO REGION ON SUNDAY AND QUICKLY MOVE EAST ON MONDAY WITH RETURN FLOW SETTING BACK UP. STRONG COLD FRONT FORECAST TO MOVE THROUGH ON TUE WITH AVN TRYING TO GENERATE SOME FROZEN PRECIP INTO WED. 84HR ETA A LITTLE WARMER IN COMPARISON... WILL STILL HOWEVER LOWER TEMPS SOME IN THE EXTENDED WITH A SLIGHT CHANCE FOR SNOW LATE TUE/WED. FCSTID = 12 .PRELIMINARY NUMBERS... TUL TB 066/035 054/038 060 +10 FSM TB 068/039 056/037 061 +30 MLC TB 067/037 056/040 062 +10 BVO TB 065/034 053/037 060 +10 FYV TB 064/036 051/035 057 +30 BYV TB 064/036 050/034 057 +30 MIO TB 065/035 051/035 058 +10 MKO TB 067/035 054/039 061 +10 F10 TB 067/038 058/043 064 +10 HHW TB 070/040 059/044 065 +10 .TSA... .AR...FLASH FLOOD WATCH...WIND ADVISORY TODAY FOR ZONES 1-2-10-11-19-20-29. .OK...FLASH FLOOD WATCH...WIND ADVISORY TODAY FOR ZONES 49-53-54>76.
In the hours before
Special weather statement, Feb 24, 6:00 AM CST, 4 hours 2 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-251200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CST SAT FEB 24 2001 ...SEVERE THUNDERSTORMS ARE EXPECTED OVER EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY... A STRONG UPPER LEVEL STORM SYSTEM MOVING ACROSS NEW MEXICO THIS MORNING WILL MOVE OUT INTO THE PLAINS TODAY. STRONG THUNDERSTORMS WERE ALREADY OCCURRING OVER WESTERN AND CENTRAL OKLAHOMA THIS MORNING...AND THIS ACTIVITY WILL SPREAD INTO EASTERN OKLAHOMA THROUGH THE MORNING...THEN INTO NORTHWEST ARKANSAS BY AROUND MIDDAY OR EARLY THIS AFTERNOON. CONDITIONS WILL BE FAVORABLE FOR STRONG DAMAGING WINDS AS A SQUALL LINE MOVES ACROSS THE REGION. THERE IS ALSO SOME POTENTIAL FOR TORNADOES AND LARGE HAIL. .SPOTTER ACTIVATION... SPOTTER ACTIVATION WILL LIKELY BE REQUIRED OVER EASTERN OKLAHOMA LATER THIS MORNING AND IN NORTHWEST ARKANSAS BY LATE THIS MORNING OR EARLY THIS AFTERNOON. .DISCUSSION... A STRONG UPPER LEVEL STORM SYSTEM WAS LOCATED OVER NEW MEXICO THIS MORNING. A DEEPENING SURFACE LOW PRESSURE SYSTEM WAS LOCATED IN SOUTHEAST COLORADO WITH A DRYLINE EXTENDING DOWN TOWARD THE EASTERN PART OF THE TEXAS PANHANDLE AND FAR WESTERN OKLAHOMA. A WARM FRONT WAS ALSO LOCATED ALONG THE RED RIVER. EARLY THIS MORNING STRONG THUNDERSTORMS WERE ALREADY ONGOING OVER WESTERN AND CENTRAL OKLAHOMA. AS THE UPPER SYSTEM MOVES OUT INTO THE PLAINS TODAY THE SURFACE LOW PRESSURE SYSTEM WILL MOVE EASTWARD ACROSS KANSAS WITH THE DRYLINE MOVING EASTWARD ACROSS OKLAHOMA. MEANWHILE...THE WARM FRONT WILL BE LIFTING TO THE NORTH ACROSS THE STATE. THUNDERSTORMS ARE EXPECTED TO SWEEP ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY IN THE FORM OF A SQUALL LINE WITH THE POTENTIAL FOR STRONG DAMAGING WINDS. THERE IS ALSO SOME POTENTIAL FOR TORNADOES AND LARGE HAIL...WITH THE GREATEST THREAT NEAR THE INTERSECTION OF THE ADVANCING DRYLINE AND THE WARM FRONT AS THEY MOVE ACROSS THE REGION. THREAT TABLE VALID THROUGH 1200 UTC SUNDAY THREAT AREA...ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THUNDERSTORM PROBABILITY...100 SEVERE WEATHER PROBABILITY IF STORMS OCCUR...80 SIGNIFICANT SEVERE WEATHER PROBABILITY IF STORMS OCCUR...60 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... HEAVY RAINS OVER THE PAST 24 HOURS COMBINED WITH ADDITIONAL RAIN EXPECTED TODAY HAVE PROMPTED A FLASH FLOOD WATCH /OKCFFATUL/ FOR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS FOR TODAY. STRONG SOUTHERLY WINDS AHEAD OF THE APPROACHING SYSTEM HAVE ALSO PROMPTED A WIND ADVISORY /OKCNPWTUL/ FOR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS FOR TODAY. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT... WWW.SRH.NOAA.GOV/TULSA
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 10:51 AM CST | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 39 min |
| Feb 24, 10:51 AM CST | Severe Thunderstorm Warning | TSA | Muskogee | 39 min |
| Feb 24, 10:55 AM CST | Severe Thunderstorm Warning | TSA | Rogers, Tulsa | 50 min |
| Feb 24, 11:16 AM CST | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 44 min |
| Feb 24, 11:17 AM CST | Severe Thunderstorm Warning | TSA | Cherokee, Wagoner | 58 min |
| Feb 24, 11:35 AM CST | Severe Thunderstorm Warning | TSA | Delaware, Mayes | 55 min |
| Feb 24, 11:35 AM CST | Severe Thunderstorm Warning | TSA | Muskogee | 40 min |
| Feb 24, 12:29 PM CST | Severe Thunderstorm Warning | TSA | Pushmataha | 31 min |
| Feb 24, 12:30 PM CST | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 60 min |
Nearby
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.