Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 388, NWS Tulsa, OK

September 7, 2001Cherokee County, Sequoyah County, Wagoner County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 10:54 PM CDT for Cherokee County, Sequoyah County, Wagoner County, Oklahoma. It was in force for 66 min. 5 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
Sep 7, 2001, 10:54 PM CDT (03:54 UTC)
Expired
Sep 8, 2001, 12:00 AM CDT
In force
66 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Cherokee County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 54 km from the middle of the area, began a volume at 04:12 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
Sep 7, 11:05 PM CDTHail 0.75Okay, OK
Sep 7, 11:20 PM CDTThunderstorm Wind 52 MTahlequah, OK
Sep 7, 11:20 PM CDTThunderstorm Wind 52 EMarble City, OKThunderstorm winds estimated at 60 miles an hour blew down large tree limbs.
Sep 7, 11:30 PM CDTThunderstorm Wind 52 ETahlequah, OKThunderstorm winds estimated at 60 miles an hour blew down large tree limbs.
Sep 7, 11:44 PM CDTThunderstorm Wind 52 EVian, 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.

IssuedProductOfficeLasted
Sep 7, 7:00 PM CDTTornado WatchSPC5 hr
Sep 7, 10:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.9 hours before the alert went out and 175 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, Springfield, MO at 00:00Z on 2001-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 932 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2001-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
932 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
2014 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

931 
WUUS54 KTSA 080354
SVRTUL
OKC021-135-145-080500-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1054 PM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  WESTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  EASTERN WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL MIDNIGHT CDT

* AT 1054 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP
  TO 80 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES
  SOUTHWEST OF TULLAHASSEE TO 17 MILES WEST OF COOKSON TO 20 MILES
  SOUTHWEST OF VIAN...MOVING NORTHEAST AT 50 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... OKAY...TULLAHASSEE...WAGONER...
  SCRAPER...PEGGS...ELDON...HULBERT...COOKSON...TAHLEQUAH...MARBLE
  CITY...VIAN AND SALLISAW.

IN ADDITION TO DAMAGING WINDS...LARGE HAIL IS ALSO LIKELY WITH THESE
STORMS.

LAT...LON 3581 9555 3581 9513 3545 9510 3541 9481
          3617 9482 3608 9535

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 Sep 7, 7:07 PM CDT, 3 hours 47 minutes earlier.

Area forecast discussion, Sep 7, 7:07 PM CDT, 3 hours 47 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
707 PM CDT FRI SEP 7 2001

WILL UPDATE FOR NEW TORNADO WATCH NUMBER 720 IN EFFECT UNTIL
MIDNIGHT.

MESONET WINDS AND 3 HOURLY PRESSURE FALLS SUGGEST THAT TORNADO
THREAT SHUD REMAIN N OF I-40.  PRIMARY SEVERE WEATHER
THREAT...HOWEVER...WILL BE LARGE HAIL AND DAMAGING WINDS.

ALSO PUSHED OFF POPS FOR FAR SE OK AND NW AR UNTIL AFTER MIDNIGHT.

UPDATE OUT AROUND 715 PM.

FCSTID = 18

.TSA...
AR...NONE.
OK...TORNADO WATCH UNTIL MIDNIGHT CDT SATURDAY FOR ZONES
OKZ054>068...OKZ070>071...OKZ073.

In the hours before

Special weather statement, Sep 7, 8:57 PM CDT, 1 hour 57 minutes before
OKZ054-055-059-080230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
857 PM CDT FRI SEP 7 2001

TORNADO WATCH NUMBER 720 HAS BEEN CANCELLED FOR PAWNEE...OSAGE AND
WASHINGTON COUNTIES IN NORTHEAST OKLAHOMA.  THUNDERSTORMS WERE
MOVING OUT OF THESE COUNTIES AND THREAT OF SEVERE WEATHER IS OVER.
Local storm report, Sep 7, 9:12 PM CDT, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
912 PM CDT FRI SEP 07 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0810 PM    SHAMROCK                  OK    70 MPH TSTM GUST
09/07/01   CREEK                           SPOTTER REPORT.

0810 PM    SHAMROCK                  OK    .75 INCH HAIL
09/07/01   CREEK                           SPOTTER REPORT.
Special weather statement, Sep 7, 9:13 PM CDT, 1 hour 41 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
913 PM CDT FRI SEP 7 2001

...UPDATE FOR TORNADO WATCH NUMBER 720...

.DISCUSSION...
AT 9PM THE LOW-LEVEL INSTABILITY AXIS EXTENDED FROM NEAR JOPLIN TO
MCALESTER.  THE LINE OF THUNDERSTORMS WILL CONTINUE SEVERE AS IT
CROSSES THIS AXIS...BUT SHOULD BEGIN TO WEAKEN AS IT MOVES PAST
THE THE GREATEST INSTABILITY AND AS THE ASSOCIATED UPPER-LEVEL
SYSTEM WEAKENS AND ACCELERATES NORTHEAST AWAY FROM THE REGION.

THE THREAT FOR SEVERE WEATHER IN WESTERN ARKANSAS AND FAR SOUTHEAST
OKLAHOMA WILL BE LIMITED IF THE STORMS WEAKEN AS EXPECTED.

SEE SHORT TERM FORECASTS FOR THE LATEST PROJECTIONS ON THIS LINE
OF SEVERE STORMS.
Local storm report, Sep 7, 9:37 PM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
937 PM CDT FRI SEP 07 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0935 PM    MAZIE                     OK    65 MPH TSTM GUST
09/07/01   MAYES                           SPOTTER REPORT.
Special weather statement, Sep 7, 10:06 PM CDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1006 PM CDT FRI SEP 7 2001

OKZ057-058-062-063-065>068-070-071-073-080400-
CHEROKEE-CRAIG-DELAWARE-MAYES-MCINTOSH-MUSKOGEE-OKFUSKEE-OKMULGEE-
OTTAWA-PITTSBURG-WAGONER-
1006 PM CDT FRI SEP 7 2001

TORNADO WATCH NUMBER 720 REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE
FOLLOWING OKLAHOMA COUNTIES...

CHEROKEE...CRAIG...DELAWARE...MAYES...MCINTOSH...MUSKOGEE...
OKFUSKEE...OKMULGEE...OTTAWA...PITTSBURG AND WAGONER COUNTIES.

THE LINE OF THUNDERSTORMS WILL CONTINUE SEVERE FOR THE NEXT COUPLE
OF HOURS AS IT MOVES ACROSS PARTS OF EASTERN OKLAHOMA.

OKZ056-060-061-064-080400-
CREEK-NOWATA-ROGERS-TULSA-
1006 PM CDT FRI SEP 7 2001

TORNADO WATCH NUMBER 720 HAS BEEN CANCELED IN CREEK...NOWATA...
ROGERS AND TULSA COUNTIES.  THE LINE OF SEVERE STORMS HAS MOVED
OUT OF THESE COUNTIES AND THE THREAT FOR SEVERE WEATHER HAS ENDED.
Special weather statement, Sep 7, 10:13 PM CDT, 41 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-080515-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1013 PM CDT FRI SEP 7 2001

...UPDATE FOR TORNADO WATCH NUMBER 720...

TORNADO WATCH NUMBER 720 FOR PARTS OF EASTERN OKLAHOMA WILL BE
REPLACED BY A SEVERE THUNDERSTORM WATCH THAT WILL COVER PARTS OF
EASTERN OKLAHOMA AND MUCH NORTHWEST ARKANSAS.

.DISCUSSION...
THE LINE OF THUNDERSTORMS MOVING ACROSS EASTERN OKLAHOMA WILL
CONTINUE SEVERE THROUGH MIDNIGHT WITH SOME WEAKENING LIKELY
THEREAFTER.  HOWEVER THE POTENTIAL FOR STRONG WINDS MAY CONTINUE INTO
THE OVERNIGHT HOURS AND A SEVERE THUNDERSTORM WATCH WILL BE ISSUED
SOON FOR MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 7:27 PM CDTSevere Thunderstorm WarningTSACreek63 min
Sep 7, 7:38 PM CDTSevere Thunderstorm WarningTSAOsage, Washington52 min
Sep 7, 7:38 PM CDTSevere Thunderstorm WarningTSAPawnee52 min
Sep 7, 7:59 PM CDTSevere Thunderstorm WarningTSANowata61 min
Sep 7, 8:03 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa57 min
Sep 7, 8:03 PM CDTSevere Thunderstorm WarningTSARogers57 min
Sep 7, 8:10 PM CDTSevere Thunderstorm WarningTSAOkfuskee50 min
Sep 7, 8:22 PM CDTSevere Thunderstorm WarningTSACraig38 min
Sep 7, 8:39 PM CDTSevere Thunderstorm WarningTSAOkmulgee, Wagoner51 min
Sep 7, 8:55 PM CDTSevere Thunderstorm WarningTSATulsa35 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSACraig, Mayes, Rogers63 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSAOttawa63 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSAOkfuskee33 min
Sep 7, 9:13 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee62 min
Sep 7, 9:13 PM CDTSevere Thunderstorm WarningTSAWagoner62 min
Sep 7, 9:39 PM CDTSevere Thunderstorm WarningTSAOkfuskee66 min
Sep 7, 9:40 PM CDTSevere Thunderstorm WarningTSADelaware65 min
Sep 7, 9:41 PM CDTSevere Thunderstorm WarningTSACherokee64 min
Sep 7, 10:11 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee, Okmulgee64 min
Sep 7, 10:14 PM CDTSevere Thunderstorm WarningTSAAdair61 min
Sep 7, 10:30 PM CDTSevere Thunderstorm WarningTSAPittsburg60 min
Sep 7, 10:39 PM CDTSevere Thunderstorm WarningTSAHaskell66 min
Sep 7, 10:59 PM CDTSevere Thunderstorm WarningTSAPittsburg46 min
Sep 7, 11:13 PM CDTSevere Thunderstorm WarningTSAMcIntosh47 min
Sep 7, 11:24 PM CDTSevere Thunderstorm WarningTSAAdair51 min
Sep 7, 11:31 PM CDTSevere Thunderstorm WarningTSALatimer, Pushmataha59 min
Sep 7, 11:42 PM CDTSevere Thunderstorm WarningTSAHaskell, LeFlore, Sequoyah63 min
Sep 8, 12:19 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha56 min
Sep 8, 1:15 AM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 3:41 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer64 min
Sep 8, 3:50 PM CDTSevere Thunderstorm WarningTSAPittsburg55 min
Sep 8, 4:45 PM CDTSevere Thunderstorm WarningTSALatimer60 min
Sep 8, 5:18 PM CDTSevere Thunderstorm WarningTSAPushmataha57 min
Sep 8, 5:30 PM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 6:09 PM CDTSevere Thunderstorm WarningTSALatimer66 min
Sep 8, 6:14 PM CDTFlash Flood WarningTSALatimer3 hr
Sep 8, 6:30 PM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 6:43 PM CDTSevere Thunderstorm WarningTSAPushmataha62 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.