Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 607, NWS Norman, OK

September 21, 1992Choctaw County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 21, 1992, 6:40 PM CDT for Choctaw County, Oklahoma. It was in force for 65 min.

The area

The counties it named.

The facts

Issued: Sep 21, 1992, 6:40 PM CDT (23:40 UTC)
Expired: Sep 21, 1992, 7:45 PM CDT
In force: 65 min
Issued by: NWS Norman, OK
Area: Whole counties

County Choctaw County, OK

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 12:00Z, 11.7 hours before the alert went out and 206 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1569 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 212342
SVROKC
OKC023-220045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
640 PM CDT MON SEP 21 1992
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  745 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN SOUTHEAST OKLAHOMA
 
   ...CHOCTAW COUNTY
 
AT 640 PM RADAR INDICATED SEVERE THUNDERSTORMS NEAR BOSWELLL...5 MILES
NORTHWEST OF SOPER AND NEAR KENT MOVING EAST AT 20 MPH. PEOPLE IN HUGO
AND BOATERS ON HUGO LAKE SHOULD SEEK SHELTER IMMEDIATELY. LARGE
HAIL...STRONG WINDS...FREQUENT LIGHTNING AND VERY HEAVY RAIN CAN BE
EXPECTED.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 7:15 PM CDT	Severe Thunderstorm Warning	OUN	Grady	45 min
Sep 20, 7:31 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	35 min
Sep 20, 7:44 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	46 min
Sep 20, 7:47 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	43 min
Sep 20, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Love	48 min
Sep 20, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Garvin	42 min
Sep 20, 9:05 PM CDT	Severe Thunderstorm Warning	OUN	Marshall	55 min
Sep 21, 4:35 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	70 min
Sep 21, 4:44 PM CDT	Tornado Warning	OUN	Alfalfa	46 min
Sep 21, 4:45 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	45 min
Sep 21, 4:58 PM CDT	Tornado Warning	OUN	Bryan	32 min
Sep 21, 5:20 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	40 min
Sep 21, 5:27 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	48 min
Sep 21, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Choctaw	66 min
Sep 21, 5:53 PM CDT	Severe Thunderstorm Warning	OUN	Grant	67 min
Sep 21, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	Kay	42 min
Sep 21, 6:18 PM CDT	Severe Thunderstorm Warning	OUN	Pushmataha	57 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1992 Every 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.