Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 71, NWS Norman, OK

April 11, 1992McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 11, 1992, 10:37 PM CDT for McClain County, Oklahoma. It was in force for 68 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 11, 1992, 10:37 PM CDT (03:37 UTC)
Expired
Apr 11, 1992, 11:45 PM CDT
In force
68 min
Issued by
NWS Norman, OK
Area
Whole counties

County McClain County, OK

What was reported inside it

TimeReportWhereRemark
Apr 11, 10:48 PM CDTHail 1Mcclain, OK
Apr 11, 11:12 PM CDTHail 0.75Mcclain, OK

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.6 hours before the alert went out and 24 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 1992-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2045 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 1992-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939Sfc1 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
2045 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1305 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

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 11, 8:14 PM CDTSevere Thunderstorm WarningOUNLincoln46 min
Apr 11, 9:01 PM CDTSevere Thunderstorm WarningOUNCaddo59 min
Apr 11, 9:45 PM CDTSevere Thunderstorm WarningOUNGrady60 min
Apr 11, 10:45 PM CDTSevere Thunderstorm WarningOUNGrady45 min
Apr 11, 11:10 PM CDTSevere Thunderstorm WarningOUNStephens50 min
Apr 11, 11:20 PM CDTSevere Thunderstorm WarningOUNGarvin55 min
Apr 11, 11:59 PM CDTSevere Thunderstorm WarningOUNStephens61 min
Apr 12, 12:15 AM CDTSevere Thunderstorm WarningOUNGarvin60 min
Apr 12, 12:36 AM CDTSevere Thunderstorm WarningOUNCarter69 min
Apr 12, 12:49 AM CDTSevere Thunderstorm WarningOUNJefferson56 min
Apr 12, 12:59 AM CDTSevere Thunderstorm WarningOUNStephens61 min
Apr 12, 1:04 AM CDTSevere Thunderstorm WarningOUNCanadian41 min
Apr 12, 1:42 AM CDTSevere Thunderstorm WarningOUNCarter, Jefferson63 min
Apr 12, 2:00 AM CDTSevere Thunderstorm WarningOUNStephens60 min
Apr 12, 2:22 AM CDTSevere Thunderstorm WarningOUNLove68 min
Apr 12, 2:43 AM CDTSevere Thunderstorm WarningOUNJefferson47 min
Apr 12, 3:02 AM CDTSevere Thunderstorm WarningOUNOklahoma43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1992Every severe thunderstorm warning in 1992

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.