Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 96, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 23, 2001, 2:45 AM CDT for Choctaw County, Oklahoma. It was in force for 60 min. 2 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
- Apr 23, 2001, 2:45 AM CDT (07:45 UTC)
- Expired
- Apr 23, 2001, 3:45 AM CDT
- In force
- 60 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), 188 km from the middle of the area, began a volume at 07:47 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 |
|---|---|---|---|
| Apr 23, 3:00 AM CDT | Hail 0.75 | Boswell, OK | |
| Apr 23, 3:10 AM CDT | Thunderstorm Wind 52 E | Boswell, 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 00:00Z, 7.8 hours before the alert went out and 197 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
- 1030 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 9.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 230745 SVRTUL OKC023-230845- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 245 AM CDT MON APR 23 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 345 AM CDT * AT 245 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF BOSWELL...MOVING EAST AT 35 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KENT... MESSER...SOPER...BOSWELL...SAWYER...GOODLAND AND HUGO. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. LAT...LON 3413 9598 3378 9604 3390 9527 3416 9534
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 Apr 23, 2:45 AM CDT, 0 minutes earlier.
Area forecast discussion, Apr 23, 2:45 AM CDT, 0 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 245 AM CDT MON APR 23 2001 LATEST 88D IMAGERY FROM KINX AND KSRX SHOWING BROKEN LINE OF SHOWERS AND A FEW THUNDERSTORMS FROM FAYETTEVILLE ARKANSAS TO MCALESTER DOWN TO THE RED RIVER. A FEW ECHOS ALSO NOW SHOWING UP ALONG COLD FRONT CURRENTLY LOCATED FROM BARTLESVILLE TO BRISTOW. SATELLITE IMAGERY SHOWING CLEAR SKIES BEHIND THE FRONT. TIMING OF THE FRONT AND POPS WILL BE MAIN ISSUES WITH THIS FORECAST AS FRONTAL TIMING WILL AFFECT ALL OTHER FORECAST ELEMENTS. ETA RUNNING A LITTLE BEHIND ON FRONTAL POSITION SO WILL GO WITH A ZONE ISSUANCE FRONTAL POSITION ALONG A LINE FROM SOUTHERN DELAWARE CO. TO MCINTOSH CO.. WILL GO WITH AT LEAST SLIGHT CHANCE POPS EARLY ALONG THIS LINE PENDING FURTHER DEVELOPMENT AND CHANCE POPS SOUTHEAST OF THAT LINE FOR THIS MORNING. TEMPS AND DEWPOINTS ARE FALLING RAPIDLY BEHIND THE FRONT SO TODAYS HIGHS WILL BE TRICKY. LIGHT NORTH WINDS AND DEWPOINTS IN THE 30S AND 40S WILL ALLOW TEMPS TO FALL QUITE NICELY TONIGHT BUT THINK COLDEST TEMPS SHOULD STAY NORTH OF THE AREA. AFTER THE FRONT PASSES THE ARE AND SKIES CLEAR OUT TONIGHT...SHOULD SEE DRY CONDITIONS PERSIST INTO THE EXTENDED. CLOUDS SHOULD REMAIN RATHER LIMITED AS WELL. WILL NOT MAKE ANY CHANGES TO EXTENDED AT THIS TIME. HOWIESON FCSTID = 44 ...PRELIMINARY NUMBERS...CHANGES LIKELY... TUL 67 45 72 48 / 0 0 0 0 FSM 70 43 74 45 / 40 0 0 0 MLC 70 45 74 48 / 40 0 0 0 BVO 65 41 72 44 / 0 0 0 0 FYV 67 41 70 43 / 40 0 0 0 BYV 67 41 70 43 / 40 0 0 0 MIO 65 41 71 44 / 10 0 0 0 MKO 67 45 72 48 / 20 0 0 0 F10 67 45 72 48 / 0 0 0 0 HHW 70 45 74 48 / 40 0 0 0 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, Apr 22, 11:30 PM CDT, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1130 PM CDT SUN APR 22 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1115 PM 4 NNW GROVE OK WIND DAMAGE
04/22/01 DELAWARE POWER LINES DOWN
EMERGENCY MANAGERSpecial weather statement, Apr 22, 11:38 PM CDT, 3 hours 7 minutes before
OKZ049-053>058-060>062-064>076-ARZ001-010-019-029-230600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1138 PM CDT SUN APR 22 2001 ...TORNADO WATCH NUMBER 175 CANCELLED FOR PARTS OF EASTERN OKLAHOMA... TORNADO WATCH NUMBER 175 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN EASTERN OKLAHOMA... CRAIG...CREEK...MAYES...NOWATA...OKFUSKEE...OKMULGEE...OSAGE... ROGERS...TULSA...WAGONER...WASHINGTON TORNADO WATCH NUMBER 175 REMAINS IN EFFECT UNTIL 1 AM FOR THE FOLLOWING COUNTIES IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS... ADAIR...BENTON...CHEROKEE...CHOCTAW...CRAWFORD...DELAWARE... HASKELL...LATIMER...LE FLORE...MCINTOSH...MUSKOGEE...OTTAWA... PITTSBURG...PUSHMATAHA...SEBASTIAN...SEQUOYAH...WASHINGTON AR
Local storm report, Apr 23, 1:12 AM CDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
112 AM CDT MON APR 23 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0102 AM 2 N WATTS OK 60 MPH TSTM GUST
04/23/01 ADAIR EMERGENCY MANAGEMENT
REPORT
0102 AM WEST SILOAM SPGS OK 60 MPH TSTM GUST
04/23/01 DELAWARE EMERGENCY MANAGEMENT
REPORT
0105 AM SILOAM SPGS AR 60 MPH TSTM GUST
04/23/01 BENTON EMERGENCY MANAGEMENT
REPORT.
DRMThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:25 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 50 min |
| Apr 22, 7:41 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 49 min |
| Apr 22, 8:07 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 38 min |
| Apr 22, 8:29 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 46 min |
| Apr 23, 12:52 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 53 min |
| Apr 23, 3:23 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 67 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.