Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 29, NWS Tulsa, OK

April 6, 2003Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 6, 2003, 1:27 PM CDT for Pittsburg County, Oklahoma. It was in force for 48 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
Apr 6, 2003, 1:27 PM CDT (18:27 UTC)
Expired
Apr 6, 2003, 2:15 PM CDT
In force
48 min
Issued by
NWS Tulsa, OK
Area
Counties, with a storm outline in the text

County Pittsburg County, OK

The radar

The Norman radar (KTLX), 124 km from the middle of the area, began a volume at 18:28 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 watch it was issued in

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

IssuedProductOfficeLasted
Apr 6, 9:45 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 6.5 hours before the alert went out and 131 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 12:00Z on 2003-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2003-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 498 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
710 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
498 m²/s²
0-3 km storm-relative helicity
695 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

324 
WUUS54 KTSA 061827
SVRTUL
OKC121-061915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
127 PM CDT SUN APR 6 2003

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN AND NORTHERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 215 PM CDT

* AT 127 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8
  MILES WEST OF ASHLAND...MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ASHLAND...
  HAYWOOD...SCIPIO...CROWDER...INDIANOLA AND CANADIAN.

HAIL TO THE SIZE OF NICKELS 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 3479 9633 3466 9618 3513 9549 3531 9569

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 Apr 6, 1:18 PM CDT, 9 minutes earlier.

Area forecast discussion, Apr 6, 1:18 PM CDT, 9 minutes before
MESOSCALE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
118 PM CDT SUN APR 6 2003

...TORNADO POTENTIAL IN FAR SOUTHEAST OKLAHOMA...

THROUGH MID AFTERNOON CAPES WILL BE AROUND 2000 J/KG WITH AMPLE DEEP
LAYER SHEAR TO SUPPORT SUPERCELLS ALONG AND SOUTH OF THE WARM FRONT
WHICH WAS ACROSS SOUTHEAST OKLAHOMA.  THIS FRONT WILL DRIFT
ONLY SLOWLY NORTH AND BY 21Z IT WILL LIKELY STILL BE
NORTHWEST-SOUTHEAST ACROSS PUSMAHTAH COUNTY.  THE GREATEST TORNADO
THREAT WILL BE AS CELLS PASS THROUGH THE SURFACE FRONTAL POSITION...
WITH A RAPID DECREASE IN TORNADO POTENTIAL AS THE STORM MOVE
FURTHER INTO THE COOL AIR.

AT 1815Z THE CELL APPROACHING PUSHMATAHA COUNTY WAS A SUPERCELL AND
HAD PRODUCED GOLFBALL SIZE HAIL AND WILL HAVE TO BE MONITORED FOR
STORM-SCALE ROTATION.

FORECAST ID= 8

.TSA...
AR...NONE.
OK...NONE.
Hazardous weather outlook, Apr 6, 1:00 PM CDT, 27 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-071100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
100 PM CDT SUN APR 6 2003

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...THROUGH TONIGHT

SEVERE WEATHER OUTLOOK

...TORNADO THREAT IN SOUTHEAST OKLAHOMA...
...SEVERE THUNDERSTORMS POSSIBLE IN MUCH OF THE AREA...

SUPERCELL THUNDERSTORMS WILL OCCUR IN SOUTHEAST OKLAHOMA THIS
AFTERNOON ALONG AND SOUTH OF A WARM FRONT AND AHEAD OF DRY LINE THAT
IS MOVING IN FROM THE WEST.  THERE IS THE POTENTIAL FOR TORNADIC
STORMS THIS AFTERNOON IN SOUTHEAST OKLAHOMA..ESPECIALLY ALONG AND
SOUTH OF A MCALESTER TO PAGE LINE.

FURTHER NORTH ACROSS THE REMAINDER OF EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS...UNSTABLE AIR WAS RIDING OVER THE TOP OF THE COOL AIR NEAR
THE GROUND AND AREAS OF THUNDERSTORMS WILL OCCUR THIS AFTERNOON AND
EARLY TONIGHT AS THE MAIN UPPER-LEVEL SYSTEM APPROACHES.  A FEW OF
THESE STORMS WILL BE SEVERE WITH LARGE HAIL BEING IN THE PRIMARY
THREAT.

THE THREAT FOR SEVERE WEATHER WILL END FROM WEST TO EAST ACROSS
THE AREA BY MIDNIGHT AS DRY LINE AND A COLD FRONT SWEEP THROUGH.

SEVERE THUNDERSTORM AND TORNADO WARNING PROBABILITIES CAN BE FOUND IN
THE OUTLOOK SECTION AT: WWW.SRH.NOAA.GOV/TULSA. GIVEN PROBABILITIES
REPRESENT THE POTENTIAL FOR A WARNING TO BE ISSUED AT YOUR LOCATION.

.DAYS TWO THROUGH SEVEN...MON THROUGH SAT
NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER / EMERGENCY MANAGEMENT ACTION STATEMENT...
EMERGENCY MANAGEMENT AGENCIES IN EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS SHOULD ALREADY BE ACTIVELY MONITORING THE PROGRESS
OF THIS EVENT.  SPOTTERS SHOULD BE READY FOR IMMEDIATE ACTIVATION...
ESPECIALLY IN SOUTHEAST OKLAHOMA.

ADDITIONAL WEATHER INFORMATION CAN BE FOUND AT...
WWW.SRH.NOAA.GOV/TULSA

In the hours before

Special weather statement, Apr 6, 9:15 AM CDT, 4 hours 12 minutes before
OKZ060-064-061445-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
915 AM CDT SUN APR 6 2003

...SIGNIFICANT WEATHER ALERT IN EFFECT FOR TULSA AND CREEK COUNTIES
   UNTIL 945 AM CDT...

AT 914 AM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
KIEFER...MOVING NORTHEAST AT 40 MPH. THIS STORM WILL BE CAPABLE OF
PRODUCING SMALL HAIL AND ADDITIONAL HEAVY RAIN AS IT MOVES THROUGH
THE TULSA METROPOLITAN AREA.  THE HEAVY RAIN WILL CAUSE PONDING OF
WATER AND LOCALIZED FLOODING OF LOW LYING AREAS AND POOR DRAINAGE
AREAS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 7:18 AM CDTSevere Thunderstorm WarningTSAOkfuskee57 min
Apr 6, 7:51 AM CDTSevere Thunderstorm WarningTSAOkmulgee39 min
Apr 6, 8:26 AM CDTSevere Thunderstorm WarningTSAMuskogee, Wagoner64 min
Apr 6, 10:25 AM CDTSevere Thunderstorm WarningTSAMayes50 min
Apr 6, 1:31 PM CDTSevere Thunderstorm WarningTSAPushmataha44 min
Apr 6, 2:10 PM CDTSevere Thunderstorm WarningTSAHaskell, Pittsburg50 min
Apr 6, 2:14 PM CDTSevere Thunderstorm WarningTSALeFlore, Pushmataha61 min
Apr 6, 2:52 PM CDTSevere Thunderstorm WarningTSAChoctaw53 min
Apr 6, 3:12 PM CDTSevere Thunderstorm WarningTSAPushmataha48 min
Apr 6, 3:17 PM CDTSevere Thunderstorm WarningTSALeFlore28 min
Apr 6, 3:21 PM CDTTornado WarningTSAPushmataha24 min
Apr 6, 3:49 PM CDTSevere Thunderstorm WarningTSALeFlore41 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2003Every severe thunderstorm warning in 2003

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.