Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 206, NWS Norman, OK

May 12, 1990Alfalfa County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 12, 1990, 1:55 AM CDT for Alfalfa County, Oklahoma. It was in force for 50 min.

The area

The counties it named.

The facts

Issued
May 12, 1990, 1:55 AM CDT (06:55 UTC)
Expired
May 12, 1990, 2:45 AM CDT
In force
50 min
Issued by
NWS Norman, OK
Area
Whole counties

County Alfalfa County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 6.9 hours before the alert went out and 181 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, Dodge City, at 00:00Z on 1990-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 932 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, Dodge City, at 00:00Z on 1990-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 267 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
932 J/kg
Mixed-layer CIN
-218 J/kg
Mixed-layer LCL
1345 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
267 m²/s²
0-3 km storm-relative helicity
358 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

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
May 11, 11:44 PM CDTSevere Thunderstorm WarningOUNMajor31 min
May 12, 12:14 AM CDTSevere Thunderstorm WarningOUNGarfield, Major46 min
May 12, 12:58 AM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Noble62 min
May 12, 1:20 AM CDTSevere Thunderstorm WarningOUNWoods40 min
May 12, 8:18 AM CDTSevere Thunderstorm WarningOUNBryan42 min
May 12, 8:39 AM CDTSevere Thunderstorm WarningOUNChoctaw66 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm warning in 1990

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.