Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 358, NWS Tulsa, OK

August 25, 2001Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 25, 2001, 11:53 PM CDT for Sequoyah County, Oklahoma. It was in force for 52 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
Aug 25, 2001, 11:53 PM CDT (04:53 UTC)
Expired
Aug 26, 2001, 12:45 AM CDT
In force
52 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 50 km from the middle of the area, began a volume at 04:56 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
Aug 26, 12:30 AM CDTHail 0.75Sallisaw, 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

Springfield, MO (KSGF), launched 00:00Z, 4.9 hours before the alert went out and 180 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 2001-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2085 joules per kilogram.LCLEL10008507005003002001001 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, Springfield, MO at 00:00Z on 2001-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 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
2085 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1505 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

586 
WUUS54 KTSA 260453
SVRTUL
OKC135-260545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1153 PM CDT SAT AUG 25 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 1245 AM CDT

* AT 1153 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 5 MILES WEST OF SALLISAW TO 6 MILES NORTH OF
  SHORT...MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...MARBLE
  CITY...SHORT...BRUSHY...VIAN...ROLAND...MULDROW...GANS AND
  SALLISAW.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA.

LAT...LON 3562 9510 3569 9448 3533 9449 3534 9479
          3547 9507

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 Aug 25, 11:15 PM CDT, 38 minutes earlier.

Area forecast discussion, Aug 25, 11:15 PM CDT, 38 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1115 PM CDT SAT AUG 25 2001

UPDATED ZONES TO DROP THE MENTION OF THE EXPIRED SEVERE THUNDERSTORM
WATCH.  ALSO TWEAKED THE POPS AND ADDED OR SUBTRACTED AREAL COVERAGE
WORDING BASED ON RADAR TRENDS.

.TSA...
AR...NONE.
OK...NONE.

ABBAS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 7:49 PM CDTSevere Thunderstorm WarningTSACreek41 min
Aug 25, 7:56 PM CDTSevere Thunderstorm WarningTSAPawnee49 min
Aug 25, 8:06 PM CDTSevere Thunderstorm WarningTSAOkfuskee54 min
Aug 25, 8:20 PM CDTSevere Thunderstorm WarningTSACreek40 min
Aug 25, 9:03 PM CDTSevere Thunderstorm WarningTSADelaware57 min
Aug 25, 9:25 PM CDTSevere Thunderstorm WarningTSAOkmulgee50 min
Aug 25, 9:35 PM CDTSevere Thunderstorm WarningTSATulsa40 min
Aug 25, 9:41 PM CDTSevere Thunderstorm WarningTSARogers, Wagoner49 min
Aug 25, 9:41 PM CDTSevere Thunderstorm WarningTSAMuskogee49 min
Aug 25, 9:58 PM CDTSevere Thunderstorm WarningTSADelaware62 min
Aug 25, 10:16 PM CDTSevere Thunderstorm WarningTSAMayes59 min
Aug 25, 10:30 PM CDTSevere Thunderstorm WarningTSACherokee, Muskogee45 min
Aug 25, 11:27 PM CDTSevere Thunderstorm WarningTSAAdair48 min
Aug 25, 11:31 PM CDTSevere Thunderstorm WarningTSACherokee44 min
Aug 26, 5:14 PM CDTSevere Thunderstorm WarningTSALeFlore61 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.