Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 265, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 21, 2001, 4:15 PM CDT for Choctaw County, Oklahoma. It was in force for 45 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
- Jun 21, 2001, 4:15 PM CDT (21:15 UTC)
- Expired
- Jun 21, 2001, 5:00 PM CDT
- In force
- 45 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Choctaw County, OK
The radar
The Western Arkansas radar (KSRX), 179 km from the middle of the area, began a volume at 21:14 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 |
|---|---|---|---|
| Jun 21, 4:25 PM CDT | Hail 0.75 | Ord, 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
Fort Worth, TX (KFWD), launched 12:00Z, 9.3 hours before the alert went out and 214 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
- 566 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1284 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 212115 SVRTUL OKC023-212200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 415 PM CDT THU JUN 21 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 500 PM CDT * AT 415 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER GRANT...MOVING EAST AT 15 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...HUSKEY... GRANT...FROGVILLE AND ORD. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3399 9552 3392 9560 3376 9517 3397 9518 $$
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 Jun 21, 3:55 PM CDT, 20 minutes earlier.
Area forecast discussion, Jun 21, 3:55 PM CDT, 20 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 355 PM CDT THU JUN 21 2001 MUCH EASIER FORECAST THAN IN PREVIOUS DAYS. CLEAR/DRY WX EXPECTED FOR THE NEXT FEW PERIODS. MODELS SHOWING SOME RETURN FLOW AND EVEN CLOUDS ACROSS WESTERN AND CENTRAL OK FRI NIGHT BUT CLOUDS SHOULD STAY WEST OF THE AREA. NEW AVN SHOWS UPR LOW CLOSING OFF THE ERN U.S. GRADUALLY RETROGRADING WITH TIME THROUGH EARLY NEXT WEEK BECOMING A HIGH OVER LOW BLOCK. SHOULD NOT SEE PRECIP ON THE BACK SIDE OF THE UPR LOW AS IT APPROACHES CWA BUT MAY TEMPER WARMUP FROM GETTING TOO WARM. ECMWF AND MRF LOOK SIMILAR. THIS PATTERN COULD BE QUITE PERSISTENT AS STRONGER WESTERLIES ARE NOW FURTHER NORTH THAN THIS LATITUDE. COULD SEE AN EXTENDED DRY PERIOD WITH NORMAL TEMPS. WILL PROBABLY REMOVE POPS FOR WED AND NOT ADD ANY FOR THURS. ONLY HOPE FOR PRECIP MIGHT BE IF A TROPICAL WAVE DEVELOPS AND MOVES NORTH INTO AR. LAST TROPICAL SYSTEM (ALLISON) STAYED SOUTH OF THE AREA WITH ONLY LIGHT SHRA OVER THE FAR SE ZONES. WILL NOT ADD POPS THIS PACKAGE. FCSTID = 26 TUL 59 84 59 86 / 0 0 0 0 FSM 60 84 59 87 / 0 0 0 0 MLC 60 85 59 88 / 10 0 0 0 BVO 55 83 55 86 / 0 0 0 0 FYV 52 80 50 85 / 0 0 0 0 BYV 52 80 50 85 / 0 0 0 0 MIO 56 80 55 85 / 0 0 0 0 MKO 59 84 59 86 / 0 0 0 0 F10 59 84 59 86 / 0 0 0 0 HHW 60 85 59 88 / 10 0 0 0 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, Jun 21, 1:03 PM CDT, 3 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
103 PM CDT THU JUN 21 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0505 AM 4 W JAY OK WIND DAMAGE
06/21/01 DELAWARE TREES DOWN (PUBLIC)
0510 AM 4 E LEACH OK WIND DAMAGE
06/21/01 DELAWARE TREES DOWN (HIGHWAY DEPT)Special weather statement, Jun 21, 1:05 PM CDT, 3 hours 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-221100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 105 PM CDT THU JUN 21 2001 ...WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS PARTS OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THIS AFTERNOON... A COLD FRONT EXTENDED FROM BRISTOW OKLAHOMA TO BENTONVILLE ARKANSAS EARLY THIS AFTERNOON. THE FRONT WILL CONTINUE MOVING SOUTH THIS AFTERNOON AND WILL MOVE ACROSS ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS BY THIS EVENING. WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE ALONG AND SOUTH OF THE FRONT ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THIS AFTERNOON. OCCASIONAL LIGHTNING AND BRIEF HEAVY RAIN WILL ACCOMPANY THUNDERSTORMS...BUT SEVERE WEATHER IS NOT EXPECTED. THUNDERSTORMS SHOULD DISSIPATE OR MOVE OUT OF THE AREA BY 6 PM. .SPOTTER ACTIVATION... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. .DISCUSSION... THERE WILL BE ENOUGH INSTABILITY FOR A FEW SHOWERS AND THUNDERSTORMS ALONG THE FRONT OR OUTFLOW BOUNDARIES THIS AFTERNOON...BUT LIMITED INSTABILITY AND A LACK OF UPPER FORCING WILL PREVENT THE DEVELOPMENT OF ORGANIZED CONVECTION.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 6:11 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Sequoyah | 49 min |
| Jun 21, 6:52 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 53 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.