Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 347, NWS Tulsa, OK

August 25, 2001Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 25, 2001, 9:25 PM CDT for Okmulgee County, Oklahoma. It was in force for 50 min. No storm report in the archive falls 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.

The facts

Issued
Aug 25, 2001, 9:25 PM CDT (02:25 UTC)
Expired
Aug 25, 2001, 10:15 PM CDT
In force
50 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Okmulgee County, OK

The radar

The Tulsa radar (KINX), 49 km from the middle of the area, began a volume at 02:24 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 25, 6:00 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 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.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2001-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1849 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, Norman, OK at 00:00Z on 2001-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1849 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
2350 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
68 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.

008 
WUUS54 KTSA 260225
SVRTUL
OKC111-260315-

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OKMULGEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1015 PM CDT

* AT 925 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8
  MILES NORTHWEST OF BALD HILL...MOVING EAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BALD HILL.

HAIL TO THE SIZE OF DIMES 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 3588 9596 3577 9602 3567 9572 3587 9577

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, 8:45 PM CDT, 40 minutes earlier.

Area forecast discussion, Aug 25, 8:45 PM CDT, 40 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
845 PM CDT SAT AUG 25 2001

UPDATED ZONES TO WORD PCP AS SCT NEAR FRONT. CONVECTION DECIDED TO
GET GOING ALONG THE BOUNDARY AFTER SUNSET AND EXTENDS FROM SW MO/NW
CORNER OF ARKANSAS TO BIG COMPLEX NEAR OKC. SVR THREAT IS EXPECTED TO
DECREASE DURING THE NEXT FEW HOURS...BUT PCP MAY BECOME MORE
WIDESPREAD. WILL HAVE TO MONITOR AND MAY NEED TO UPDATE LATER TO
RAISE POPS IN THE SOUTH. /13

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

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, 9:35 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 25, 11:53 PM CDTSevere Thunderstorm WarningTSASequoyah52 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.