Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 354, NWS Tulsa, OK

August 25, 2001Cherokee County, Muskogee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 25, 2001, 10:30 PM CDT for Cherokee County, Muskogee County, Oklahoma. It was in force for 45 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: Aug 25, 2001, 10:30 PM CDT (03:30 UTC)
Expired: Aug 25, 2001, 11:15 PM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cherokee County, OK, Muskogee County, OK

The radar

The Tulsa radar (KINX), 53 km from the middle of the area, began a volume at 03:34 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
Aug 25, 10:30 PM CDT	Hail 0.75	Muskogee, OK
Aug 25, 11:00 PM CDT	Thunderstorm Wind 52 E	Hulbert, OK	Thunderstorm winds estimated at 60 miles an hour blew down large tree limbs.

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.

Issued	Product	Office	Lasted
Aug 25, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.5 hours before the alert went out and 177 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

290 
WUUS54 KTSA 260332
SVRTUL
OKC021-101-260415-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1030 PM CDT SAT AUG 25 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA   

* UNTIL 1115 PM CDT

* AT 1032 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 5 MILES NORTH OF HULBERT TO 2 MILES NORTHWEST
  OF FORT GIBSON TO 3 MILES SOUTHWEST OF MUSKOGEE...MOVING SOUTHEAST
  AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...WEBBERS
  FALLS...FORT GIBSON...BRAGGS...KEEFETON...MUSKOGEE...OKAY...
  PEGGS...HULBERT AND TAHLEQUAH.

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 3612 9518 3585 9538 3571 9558 3553 9534
          3536 9514 3569 9511 3597 9480

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, 1 hour 45 minutes earlier.

Area forecast discussion, Aug 25, 8:45 PM CDT, 1 hour 45 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.

Issued	Product	Office	Counties	Lasted
Aug 25, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	Creek	41 min
Aug 25, 7:56 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	49 min
Aug 25, 8:06 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	54 min
Aug 25, 8:20 PM CDT	Severe Thunderstorm Warning	TSA	Creek	40 min
Aug 25, 9:03 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	57 min
Aug 25, 9:25 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	50 min
Aug 25, 9:35 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	40 min
Aug 25, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	49 min
Aug 25, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	49 min
Aug 25, 9:58 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	62 min
Aug 25, 10:16 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	59 min
Aug 25, 11:27 PM CDT	Severe Thunderstorm Warning	TSA	Adair	48 min
Aug 25, 11:31 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	44 min
Aug 25, 11:53 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	52 min
Aug 26, 5:14 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every 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.