Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 96, NWS Tulsa, OK

April 23, 2001Choctaw County, Oklahoma

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

TimeReportWhereRemark
Apr 23, 3:00 AM CDTHail 0.75Boswell, OK
Apr 23, 3:10 AM CDTThunderstorm Wind 52 EBoswell, 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.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2001-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1030 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2001-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 288 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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 MANAGER
Special 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.

DRM

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 22, 7:25 PM CDTSevere Thunderstorm WarningTSANowata, Washington50 min
Apr 22, 7:41 PM CDTSevere Thunderstorm WarningTSARogers49 min
Apr 22, 8:07 PM CDTSevere Thunderstorm WarningTSACraig38 min
Apr 22, 8:29 PM CDTSevere Thunderstorm WarningTSAOkmulgee46 min
Apr 23, 12:52 AM CDTSevere Thunderstorm WarningTSAAdair, Delaware53 min
Apr 23, 3:23 AM CDTSevere Thunderstorm WarningTSAPushmataha67 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.