Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 310, NWS Norman, OK

June 18, 1992Grady County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 18, 1992, 9:49 PM CDT for Grady County, Oklahoma. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1992, 9:49 PM CDT (02:49 UTC)
Expired
Jun 18, 1992, 10:45 PM CDT
In force
56 min
Issued by
NWS Norman, OK
Area
Whole counties

County Grady County, OK

The radar

The Norman radar (KTLX), 65 km from the middle of the area, began a volume at 02:50 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

Fort Sill, OK (KFSI), launched 00:00Z, 2.8 hours before the alert went out and 62 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, Fort Sill, OK at 00:00Z on 1992-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1745 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Sill, OK at 00:00Z on 1992-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
1745 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1530 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 190250
SVROKC
OKC051-190345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
949 PM CDT THU JUN 18 1992
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:14 PM CDTFlash Flood WarningOUNKingfisher, Logan3 hr
Jun 18, 7:24 PM CDTSevere Thunderstorm WarningOUNKingfisher51 min
Jun 18, 7:48 PM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma42 min
Jun 18, 8:01 PM CDTSevere Thunderstorm WarningOUNCanadian59 min
Jun 18, 8:28 PM CDTSevere Thunderstorm WarningOUNOklahoma47 min
Jun 18, 8:30 PM CDTSevere Thunderstorm WarningOUNBlaine, Custer, Dewey45 min
Jun 18, 8:59 PM CDTSevere Thunderstorm WarningOUNCanadian61 min
Jun 18, 9:59 PM CDTSevere Thunderstorm WarningOUNCanadian31 min
Jun 18, 10:18 PM CDTSevere Thunderstorm WarningOUNGrady, McClain57 min
Jun 19, 12:30 AM CDTSevere Thunderstorm WarningOUNJackson60 min
Jun 19, 1:25 AM CDTSevere Thunderstorm WarningOUNTillman50 min
Jun 19, 1:10 PM CDTTornado WarningOUNKay65 min
Jun 19, 3:21 PM CDTSevere Thunderstorm WarningOUNLincoln54 min
Jun 19, 3:28 PM CDTSevere Thunderstorm WarningOUNLogan47 min
Jun 19, 4:13 PM CDTSevere Thunderstorm WarningOUNLincoln, Pottawatomie47 min
Jun 19, 4:13 PM CDTSevere Thunderstorm WarningOUNSeminole47 min
Jun 19, 5:00 PM CDTSevere Thunderstorm WarningOUNHughes45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.