Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 252, NWS Norman, OK

May 8, 2003Garvin County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 8, 2003, 10:18 PM CDT for Garvin County, McClain County, Oklahoma. It was in force for 42 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
May 8, 2003, 10:18 PM CDT (03:18 UTC)
Expired
May 8, 2003, 11:00 PM CDT
In force
42 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

Counties Garvin County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 56 km from the middle of the area, began a volume at 03:18 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.3 hours before the alert went out and 43 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 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3798 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 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 330 square meters per square second.1939587897117Sfc1 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
3798 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
330 m²/s²
0-3 km storm-relative helicity
364 m²/s²
Significant tornado parameter
8.2
Supercell composite
31.1

Open this sounding in Storm Lab

The text

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

940 
WUUS54 KOUN 090318
SVROKC
OKC049-087-090400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1018 PM CDT THU MAY 8 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCCLAIN COUNTY IN CENTRAL OKLAHOMA
  GARVIN COUNTY IN SOUTHERN OKLAHOMA

* UNTIL 1100 PM CDT

* AT 1018 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM OVER
  MAYSVILLE...MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE MAYSVILLE...PAOLI...ROSEDALE AND
  WAYNE

HAIL UP TO THE SIZE OF QUARTERSARE LIKELY WITH THIS SEVERE 
THUNDERSTORM.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

LAT...LON 3482 9755 3468 9742 3491 9699 3496 9733

$$
CJS

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 10:58 PM CDTSevere Thunderstorm WarningOUNPottawatomie47 min
May 8, 11:15 PM CDTSevere Thunderstorm WarningOUNSeminole45 min
May 8, 11:24 PM CDTSevere Thunderstorm WarningOUNPontotoc51 min
May 8, 11:40 PM CDTSevere Thunderstorm WarningOUNHughes50 min
May 9, 12:26 AM CDTSevere Thunderstorm WarningOUNHughes19 min
May 9, 2:40 PM CDTSevere Thunderstorm WarningOUNWashita50 min
May 9, 3:04 PM CDTSevere Thunderstorm WarningOUNBlaine26 min
May 9, 4:56 PM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma49 min
May 9, 5:06 PM CDTSevere Thunderstorm WarningOUNJackson, Tillman39 min
May 9, 5:10 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa50 min
May 9, 5:17 PM CDTTornado WarningOUNLincoln, Logan, Payne43 min
May 9, 5:43 PM CDTSevere Thunderstorm WarningOUNCaddo47 min
May 9, 5:48 PM CDTSevere Thunderstorm WarningOUNWashita47 min
May 9, 5:59 PM CDTTornado WarningOUNPayne31 min
May 9, 6:01 PM CDTSevere Thunderstorm WarningOUNKiowa, Logan29 min
May 9, 6:26 PM CDTSevere Thunderstorm WarningOUNGreer49 min
May 9, 6:30 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Washita45 min
May 9, 6:35 PM CDTTornado WarningOUNCaddo25 min
May 9, 6:41 PM CDTSevere Thunderstorm WarningOUNBlaine49 min
May 9, 6:45 PM CDTSevere Thunderstorm WarningOUNBeckham, Kiowa, Washita45 min
May 9, 6:55 PM CDTSevere Thunderstorm WarningOUNKingfisher50 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.