Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 247, NWS Tulsa, OK

August 13, 2002Haskell County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 13, 2002, 9:43 PM CDT for Haskell County, Oklahoma. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 13, 2002, 9:43 PM CDT (02:43 UTC)
Expired: Aug 13, 2002, 10:30 PM CDT
In force: 47 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Haskell County, OK

The radar

The Western Arkansas radar (KSRX), 61 km from the middle of the area, began a volume at 02:42 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.7 hours before the alert went out and 215 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: 621 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 504 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 13.8

Open this sounding in Storm Lab

The text

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

120 
WUUS54 KTSA 140243
SVRTUL
OKC061-140330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
943 PM CDT TUE AUG 13 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1030 PM CDT

* AT 943 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3
  MILES NORTHEAST OF LEQUIRE...MOVING SOUTHEAST AT 25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...STIGLER...
  LEQUIRE...MC CURTAIN AND KEOTA.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM
HAS PASSED.

LAT...LON 3531 9511 3509 9518 3508 9495 3532 9481

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 13, 9:00 PM CDT, 43 minutes earlier.

Area forecast discussion, Aug 13, 9:00 PM CDT, 43 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
900 PM CDT TUE AUG 13 2002

UPDATED FORECASTS WILL BE SENT IN THE NEXT HALF HOUR.  MAJOR CHANGES
WILL BE DROPPING THE WATCH THAT IS EXPIRING FOR PITTSBURG...LATIMER
AND LE FLORE COUNTIES AND ADDING A NEW WATCH BANNER FOR PUSHMATAHA
AND CHOCTAW COUNTIES.  OTHER CHANGES WILL BE RAISING POPS FOR THE
OVERNIGHT PERIOD AND ADDING POPS FOR THE MORNING PERIOD.  UPPER
TROUGH WILL NOT MOVE THROUGH UNTIL THE MORNING AND THERE COULD STILL
BE SOMETHING BEHIND THE FRONT MUCH AS THE ETA AND AVN MOS SUGGEST.

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

ABBAS

In the hours before

Special weather statement, Aug 13, 7:15 PM CDT, 2 hours 28 minutes before

OKZ049-053-065-066-070>076-140200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
715 PM CDT TUE AUG 13 2002

SEVERE THUNDERSTORM WATCH #604 HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...MUSKOGEE...OKMULGEE...OKFUSKEE...SEQUOYAH...MCINTOSH AND
HASKELL...

SEVERE THUNDERSTORM WATCH #604 REMAINS IN EFFECT UNTIL 900 PM CDT
FOR...LE FLORE...PITTSBURG...LATIMER...PUSHMATAHA AND CHOCTAW
COUNTIES...

WHILE THUNDERSTORMS ARE EXPECTED OVER ALL OF EASTERN OKLAHOMA THIS
EVENING...THE STRONGEST THUNDERSTORMS WILL LIKELY STAY TO THE SOUTH
OF A MCALESTER TO WILBURTON TO POTEAU LINE.  THUS...THE WATCH HAS
BEEN CANCELLED FOR POINTS TO THE NORTH OF THIS LINE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 7:53 PM CDT	Flash Flood Warning	TSA	Pawnee	2 hr
Aug 13, 7:56 PM CDT	Flash Flood Warning	TSA	Pawnee	2 hr
Aug 13, 10:20 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	40 min
Aug 14, 12:52 AM CDT	Flash Flood Warning	TSA	Pushmataha	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2002 Every severe thunderstorm warning in 2002

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.