Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 155, NWS Norman, OK

April 24, 1999Kiowa County, Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 24, 1999, 10:23 AM CDT for Kiowa County, Washita County, Oklahoma. It was in force for 52 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 24, 1999, 10:23 AM CDT (15:23 UTC)
Expired
Apr 24, 1999, 11:15 AM CDT
In force
52 min
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Kiowa County, OK, Washita County, OK

What was reported inside it

TimeReportWhereRemark
Apr 24, 10:50 AM CDTHail 1Rocky, OK
Apr 24, 11:00 AM CDTHail 1Sentinel, OKHail was reported to be 3 to 4 inches deep.

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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 3.4 hours before the alert went out and 145 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 1999-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 1999-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.19395878Sfc1 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
17 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
372 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 9:14 AM CDTSevere Thunderstorm WarningOUNGreer46 min
Apr 24, 9:59 AM CDTSevere Thunderstorm WarningOUNBeckham, Greer46 min
Apr 24, 11:17 AM CDTSevere Thunderstorm WarningOUNWashita43 min
Apr 24, 11:58 AM CDTSevere Thunderstorm WarningOUNWashita62 min
Apr 24, 1:03 PM CDTSevere Thunderstorm WarningOUNCuster, Washita57 min
Apr 24, 1:27 PM CDTFlash Flood WarningOUNCoal, Hughes6 hr
Apr 24, 1:57 PM CDTSevere Thunderstorm WarningOUNCuster48 min
Apr 24, 3:14 PM CDTFlash Flood WarningOUNCuster6 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.