Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 237, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 30, 2001, 7:31 PM CDT for Latimer County, Pittsburg County, Oklahoma. It was in force for 44 min. 3 reports 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
- May 30, 2001, 7:31 PM CDT (00:31 UTC)
- Expired
- May 30, 2001, 8:15 PM CDT
- In force
- 44 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Latimer County, OK, Pittsburg County, OK
The radar
The Western Arkansas radar (KSRX), 133 km from the middle of the area, began a volume at 00:34 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 |
|---|---|---|---|
| May 30, 7:52 PM CDT | Hail 0.88 | Hartshorne, OK | |
| May 30, 7:56 PM CDT | Tornado F0 | Haileyville, OK | An F0 tornado touched down briefly just south of Haileyville. No damage was reported. |
| May 30, 8:10 PM CDT | Hail 0.75 | Haywood, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 30, 4:00 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 0.5 hours before the alert went out and 152 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
- 3451 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1129 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 7.7
The text
As transmitted, in the capitals the NWS used until 2016.
795 WUUS54 KTSA 310032 SVRTUL OKC077-121-310115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 731 PM CDT WED MAY 30 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 815 PM CDT * AT 731 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHEAST OF ALDERSON...MOVING EAST AT 20 MPH. A SECOND SEVERE STORM WAS NEAR STUART. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KREBS... ALDERSON...HAYWOOD...HARTSHORNE...MCALESTER...DAMON AND WILBURTON. HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. LAT...LON 3503 9608 3485 9609 3481 9526 3503 9530
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 May 30, 4:05 PM CDT, 3 hours 26 minutes earlier.
Area forecast discussion, May 30, 4:05 PM CDT, 3 hours 26 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 405 PM CDT WED MAY 30 2001 ...ADDED TORNADO WATCH 329 TO SE OK ZONES... ...ROUTINE ISSUANCE OUT SHORTLY... COMPLEX THAT BROUGHT RAIN TO MUCH OF THE AREA EARLIER WAS DIMINISHING AS IT PUSHES EAST INTO CENTRAL AR. OTHER ACTIVITY WAS OCCURRING ACROSS CENTRAL/ERN KS IN ASSOCIATION WITH THE UPPER LOW. AS FOR ADDITIONAL CONVECTION ACROSS OUR AREA... MAIN FOCUS FOR SRN ZONES WILL BE OUTFLOW BOUNDARY CURRENTLY SITUATED OVER SRN OK IN THE VICINITY OF THE RED RIVER. SURFACE LOW WAS LOCATED ACROSS NE KS...WITH ATTENDANT COLD FRONT EXTENDING INTO CENTRAL AND SOUTHWEST OK. THIS FRONT LOOKS TO OFFER A CHANCE OF ADDITIONAL STORMS ACROSS AREAS NORTH OF I-40...THOUGH INSTABILITIES HAVE BEEN HAMPERED SOMEWHAT DUE TO CLOUD COVER. LIS IN THE -10 TO -12 HAVE BEEN NOTED ACROSS NRN TX IN AREAS THAT HAVE BENEFITED FROM AFTERNOON SUN. STILL PLENTY OF INSTABILITY ACROSS SE OK TO KEEP MENTION OF SVR IN ZONES TONIGHT. AVN AND ETA ARE IN AGREEMENT WITH REGARDS TO S/W DROPPING SE FROM CO AND SWINGING ACROSS TX OVERNIGHT. HEAVIEST RAINS OVERNIGHT SHOULD BE CONFINED TO FAR SRN OK AND NRN TX WHERE UPPER SUPPORT WILL BE MAXIMIZED. DESPITE LOW FFG VALUES...WILL HOLD OFF ON ISSUING FFA FOR NOW ACROSS NE OK/FAR NW AR WITH HEAVY RAIN THREAT TO THE SOUTH. SFC FRONT AND S/W PUSH OFF TO THE EAST TOMORROW AS SFC HIGH PRESSURE QUICKLY SETTLES OVER THE AREA. NEXT CHANCE FOR STORMS APPEARS TO BE FRIDAY. WINDS SHIFT AROUND TO THE SW ON FRI OUT AHEAD OF A SFC FRONT THAT APPROACHES FORM THE NORTH LATE IN THE AFTERNOON FRIDAY. LAPSE RATES WILL BE STEEP BY FRIDAY AFTERNOON AS H5 VORT AND ASSOCIATED COLD AIR POCKET BRUSH THE AREA. WILL KEEP SAT AND SUN DRY...BUT WILL ADD SLIGHT CHANCE FOR STORMS ON MONDAY AS 12Z AVN HAS FOLLOWED 00Z MRF WITH AN APPROACHING COLD FRONT AND S/W. SFC HIGH SETTLES IN BEHIND FRONT...SO DRY WX IN STORE FOR TUES-WED. FCSTID = 23 .PRELIMINARY NUMBERS... TUL 60 78 58 83 / 40 10 0 0 FSM 62 82 59 86 / 50 20 0 0 MLC 62 80 58 85 / 50 20 0 0 BVO 59 78 55 83 / 40 10 0 0 FYV 60 75 50 81 / 50 10 0 0 BYV 60 75 50 80 / 50 10 0 0 MIO 60 75 53 81 / 40 10 0 0 MKO 61 78 59 83 / 40 10 0 0 F10 61 79 58 84 / 40 10 0 0 HHW 62 81 59 85 / 50 20 0 0 .TSA... AR...NONE. OK...TORNADO WATCH UNTIL 900 PM CDT WEDNESDAY FOR ZONES OKZ049...OKZ053...OKZ073...OKZ075>076.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 7:58 PM CDT | Tornado Warning | TSA | Latimer, Pittsburg | 47 min |
| May 30, 8:40 PM CDT | Tornado Warning | TSA | Pittsburg | 50 min |
| May 30, 8:42 PM CDT | Tornado Warning | TSA | Latimer | 48 min |
| May 30, 9:11 PM CDT | Flash Flood Warning | TSA | Pittsburg | 3 hr |
| May 30, 9:15 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 45 min |
| May 30, 9:26 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 49 min |
| May 30, 9:28 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg | 47 min |
| May 30, 9:50 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 40 min |
| May 30, 9:59 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 46 min |
| May 30, 10:15 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 45 min |
| May 30, 10:25 PM CDT | Flash Flood Warning | TSA | Pushmataha | 3 hr |
| May 30, 10:38 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 52 min |
| May 30, 10:58 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 47 min |
| May 31, 12:02 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 43 min |
| May 31, 12:23 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 52 min |
| May 31, 12:56 AM CDT | Flash Flood Warning | TSA | Pushmataha | 3 hr |
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.