Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 310, NWS Norman, OK

May 16, 1999Wichita County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 16, 1999, 11:12 PM CDT for Wichita County, Wilbarger County, Texas. It was in force for 48 min. 4 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
May 16, 1999, 11:12 PM CDT (04:12 UTC)
Expired
May 17, 1999, 12:00 AM CDT
In force
48 min
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Wichita County, TX, Wilbarger County, TX

What was reported inside it

TimeReportWhereRemark
May 16, 11:14 PM CDTHail 0.88Electra, TX
May 16, 11:17 PM CDTHail 1Harrold, TX
May 16, 11:32 PM CDTHail 1Haynesville, TX
May 16, 11:45 PM CDTHail 1Burkburnett, TX

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.

IssuedProductOfficeLasted
May 16, 10:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.2 hours before the alert went out and 196 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 1999-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3513 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 1999-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
3513 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
880 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
1.3
Supercell composite
8.9

Open this sounding in Storm Lab

The text

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

999 
WUUS1 KOKC 170416 RRA
SVROKC
TXC485-487-170500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1112 PM CDT SUN MAY 16 1999

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WICHITA COUNTY IN WESTERN NORTH TEXAS
  WILBARGER COUNTY IN WESTERN NORTH TEXAS

* UNTIL MIDNIGHT CDT

* AT 1112 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS
  IN NORTHEAST WILBARGER AND NORTHWEST WICHITA COUNTIES. 
  THE STORMS WERE MOVING EAST NORTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BURKBURNETT...ELECTRA...
  GRAYBACK...IOWA PARK AND OKLAUNION

HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS TO AT LEAST 60 MPH 
ARE LIKELY.

LAT...LON 3400 9924 3386 9909 3387 9855 3407 9849
          3420 9908

CJS

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 7:03 PM CDTSevere Thunderstorm WarningOUNHardeman42 min
May 16, 7:54 PM CDTSevere Thunderstorm WarningOUNFoard, Hardeman51 min
May 16, 8:37 PM CDTTornado WarningOUNFoard, Hardeman, Wilbarger38 min
May 16, 9:18 PM CDTSevere Thunderstorm WarningOUNWilbarger42 min
May 16, 9:25 PM CDTSevere Thunderstorm WarningOUNFoard50 min
May 16, 9:43 PM CDTSevere Thunderstorm WarningOUNWilbarger47 min
May 16, 10:16 PM CDTSevere Thunderstorm WarningOUNFoard44 min
May 16, 10:22 PM CDTSevere Thunderstorm WarningOUNWichita53 min
May 16, 10:29 PM CDTSevere Thunderstorm WarningOUNWilbarger46 min
May 16, 10:36 PM CDTFlash Flood WarningOUNFoard, Wilbarger3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999

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.