Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 521, NWS Norman, OK

June 23, 1991McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 23, 1991, 4:41 PM CDT for McClain County, Oklahoma. It was in force for 54 min. 1 report 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
Jun 23, 1991, 4:41 PM CDT (21:41 UTC)
Expired
Jun 23, 1991, 5:35 PM CDT
In force
54 min
Issued by
NWS Norman, OK
Area
Whole counties

County McClain County, OK

What was reported inside it

TimeReportWhereRemark
Jun 23, 4:42 PM CDTThunderstorm Wind 52Mcclain, 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 12:00Z, 9.7 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 12:00Z on 1991-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 330 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 12:00Z on 1991-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
330 J/kg
Mixed-layer CIN
-238 J/kg
Mixed-layer LCL
1199 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 232144
SVROKC
OKC027-087-133-232245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
441 PM CDT SUN JUN 23 1991
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN CENTRAL OKLAHOMA
 
   ...SOUTHERN CLEVELAND COUNTY...SOUTHERN MCCLAIN COUNTY
   ...SEMINOLE COUNTY
 
AT 440 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 10
MILES NORTHWEST OF SEMINOLE TO MACOMB TO NEAR LEXINGTON. THIS LINE WAS
MOVING SOUTHEAST AT 30 MPH.
 
DAMAGING WINDS IN EXCESS OF 60 MPH ARE POSSIBLE WITH THESE STORMS.
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO ARZEAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 23, 1:16 PM CDT, 3 hours 25 minutes before
OKZ004>021-231900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
113 PM CDT SUN JUN 23 1991

AT 113 PM NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF STRONG
THUNDERSTORMS MOVING THROUGH NORTHWEST OKLAHOMA. THE LEADING EDGE OF
THE THUNDERSTORM LINE WAS LOCATED FROM HELENA...TO SEILING...TO JUST
SOUTH OF REYDON. THE STORMS WERE MOVING SOUTHEAST AT 30 MPH AND MAY
PRODUCE HALF-INCH DIAMETER HAIL...WINDS TO 50 MPH...AND HEAVY
RAINFALL.

THESE STORMS LIKELY WILL MOVE INTO CENTRAL OKLAHOMA BETWEEN 3 AND 4
PM.
Special weather statement, Jun 23, 1:26 PM CDT, 3 hours 15 minutes before
TXC337-230030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
125 PM CDT SUN JUN 23 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR FOARD..HARDEMAN.. AND
WILBARGER COUNTIES OF NORTHCENTRAL TEXAS UNTIL 700 PM CDT...

AT 115 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED SCATTERED HEAVY
THUNDERSTORMS BEGINNING TO DEVELOPE INTO A LINE OF THUNDERSTORMS
EXTENDING SOUTH FROM NORMAN OKLAHOMA SOTH TO SAINT JO IN EXTREME EASTERN
MONTAGUE COUNTY.

AT THIS TIME THESE STROMS ARE ONLY PRODUCING SHORT PERIODS OF LOCALLY
HEAVY RAIN AND GUSTY SURFACE WIND...HOWEVER AS AFTERNOON HEATING
CONTINUES THESE STORMS ARE LIKELY TO FURTHER DEVELOPE AND MAY BECOME
SEVERE.

IN OTHER AREAS SEVERE THUNDERSTORMS WERE OCCURRING 125 MILES NORTHWEST
OF WICHITA FALLS AND WERE MOVING SLOWLY SOUTHEAST AND MAY AFFECT WICHITA
FALLS AND SURROUNDING AREAS LATER THIS AFTERNOON AND EVENING.

NO THUNDERSTORMS WERE NOTED IN HARDEMAN..FOARD.. AND WILBARGER COUNTINES
AT THIS TIME.

THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS
REMAINS HIGH FOR LATE THIS AFTERNOON AND EVENING..ALL PERSONS IN NORTH
CENTRAL TEXAS SHOULD KEEP ABREAST OF WEATHER DEVELOPMENTS.

STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE
WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 2:24 PM CDT, 2 hours 17 minutes before
TXC337-230030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
225 PM CDT SUN JUN 23 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR FOARD..HARDEMAN.. AND
WILBARGER COUNTIES OF NORTHCENTRAL TEXAS UNTIL 700 PM CDT...

AT 215 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF SEVERE
THUNDERSTORMS ACROSS WEST CENTRAL OKLAHOMA.  THE LEADING EDGE OF SEVERE
THUNDERSTORMS WAS LOCATED 30 MILES NORTHWEST OF HOBART AND EXTENDED NORTH
EAST TO 35 MILES NORTHWEST OF OKLAHOMA CITY OKLAHOMA.

MOVEMENT WAS TO THE SOUTHEAST AT 30 MPH.

IF THIS AREA OF SEVERE THUNDERSTORMS CONTINUES ITS CURRENT COURSE AND
SPEED ... THEY WOULD CROSS THE RED RIVER INTO NORTH CENTRAL TEXAS NEAR
WICITA FALLS BETWEEN 500 AND 600 PM CDT THIS EVENING. THSES STORMS WILL
BE MONITORED CLOSELY THIS AFTERNOON.
NO THUNDERSTORMS WERE NOTED IN HARDEMAN..FOARD.. AND WILBARGER COUNTINES
AT THIS TIME.

THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS
REMAINS HIGH FOR LATE THIS AFTERNOON AND EVENING..ALL PERSONS IN NORTH
CENTRAL TEXAS SHOULD KEEP ABREAST OF WEATHER DEVELOPMENTS.

STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE
WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 2:30 PM CDT, 2 hours 11 minutes before
OKZ004>018-232000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
225 PM CDT SUN JUN 23 1991

...THUNDERSTORMS APPROACHING SOUTHWEST AND CENTRAL OKLAHOMA...

AT 225 PM CDT RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING
FROM NEAR DOVER TO WEATHERFORD TO JUST WEST OF HOBART.  THIS LINE OF
STORMS WAS MOVING EAST-SOUTHEAST AT 35 MPH.  THE STORMS WILL ENTER
SOUTHWEST AND CENTRAL OKLAHOMA BY 4 PM CDT.

HAIL UP TO A HALF INCH IN DIAMETER...WINDS TO NEAR 50 MPH AND FREQUENT
LIGHTNING ARE POSSIBLE WITH THESE THUNDERSTORMS.  PERSONS ENGAGED IN
OUTDOOR ACTIVITIES...ESPECIALLY AREA LAKES SHOULD BE PREPARED TO MOVE
TO SHELTER.
Special weather statement, Jun 23, 3:20 PM CDT, 1 hour 21 minutes before
TXC337-230030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
320 PM CDT SUN JUN 23 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1000 PM CDT THIS EVENING...

AT 315 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF SEVERE
THUNDERSTORMS ACROSS SOUTHWEST AND WEST CENTRAL OKLAHOMA.  THE LEADING
EDGE OF THIS LINE OF SEVERE THUNDERSTORMS EXTENDED NORTHEAST FROM NEAR
HOBART OKLAHOMA TO JUST NORTH OF OKLAHOMA CITY OKLAHOMA.

MOVEMENT WAS TO THE EAST SOUTHEAST AT 30 MPH.

IF THIS AREA OF SEVERE THUNDERSTORMS CONTINUES ITS CURRENT COURSE AND
SPEED ... THEY WOULD CROSS THE RED RIVER INTO NORTH CENTRAL TEXAS NEAR OR
EAST OF WICITA FALLS AROUND 500 PM CDT THIS EVENING. THESE STORMS WILL
BE MONITORED CLOSELY THIS AFTERNOON AS THEY MOVE SOUTHEAST.

THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS
IS HIGH THIS AFTERNOON AND EVENING.  PERSONS IN NORTH CENTRAL TEXAS
SHOULD KEEP ABREAST OF WEATHbER DEVELOPMENTS.

STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE
WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 4:32 PM CDT, 9 minutes before
TXC009-023-077-155-197-275-337-485-487-232230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
432 PM CDT SUN JUN 23 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT....

AT 420 PM CDT...NEAREST THUNDERSTORMS WERE NEAR OKLAHOMA
CITY.  THESE STORMS WERE MOVING TO THE SOUTHEAST AT 20 MPH.

THE ATMOSPHERE IN THE WICHITA FALLS AREA IS VERY UNSTABLE.  THE
POTENTIAL FOR SEVERE THUNDERSTORMS IN QUITE HIGH.  PERSONS IN
ARCHER..BAYLOR..CLAY..FOARD..HARDEMAN..KNOX..MONTAGUE..WICHITA..AND
WILBARGER COUNTIES SHOULD BE PREPARED TO TAKE ACTION SHOULD SEVERE
WEATHER APPROACH.

STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVATION IF SEVERE
WEATHER DOES OCCUR.

STAY TUNED TO NOAA WEATHER RADIO OR TELEVISION FOR FURTHER STATEMENTS
AND POSSIBLE WARNINGS.

PB/RD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 7:03 PM CDTSevere Thunderstorm WarningOUNPushmataha57 min
Jun 22, 7:22 PM CDTSevere Thunderstorm WarningOUNGarvin68 min
Jun 22, 7:49 PM CDTSevere Thunderstorm WarningOUNChoctaw56 min
Jun 22, 7:55 PM CDTSevere Thunderstorm WarningOUNBryan, Johnston65 min
Jun 22, 8:09 PM CDTFlash Flood WarningOUNBryan2 hr
Jun 22, 8:22 PM CDTSevere Thunderstorm WarningOUNCarter68 min
Jun 22, 8:51 PM CDTSevere Thunderstorm WarningOUNMarshall69 min
Jun 22, 9:20 PM CDTSevere Thunderstorm WarningOUNMurray55 min
Jun 22, 9:24 PM CDTSevere Thunderstorm WarningOUNLove51 min
Jun 22, 9:25 PM CDTFlash Flood WarningOUNMarshall3 hr
Jun 22, 10:10 PM CDTFlash Flood WarningOUNBryan2 hr
Jun 23, 12:33 PM CDTSevere Thunderstorm WarningOUNWoods42 min
Jun 23, 1:51 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Major69 min
Jun 23, 2:01 PM CDTSevere Thunderstorm WarningOUNGrant59 min
Jun 23, 2:46 PM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne59 min
Jun 23, 2:46 PM CDTSevere Thunderstorm WarningOUNKingfisher59 min
Jun 23, 2:55 PM CDTSevere Thunderstorm WarningOUNGarfield35 min
Jun 23, 3:01 PM CDTSevere Thunderstorm WarningOUNCanadian, Oklahoma59 min
Jun 23, 3:40 PM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne65 min
Jun 23, 3:40 PM CDTSevere Thunderstorm WarningOUNLincoln65 min
Jun 23, 3:50 PM CDTSevere Thunderstorm WarningOUNCanadian, Cleveland, Grady, McClain, Oklahoma55 min
Jun 23, 4:06 PM CDTSevere Thunderstorm WarningOUNPottawatomie69 min
Jun 23, 4:41 PM CDTSevere Thunderstorm WarningOUNCleveland34 min
Jun 23, 4:41 PM CDTSevere Thunderstorm WarningOUNSeminole64 min
Jun 23, 4:45 PM CDTSevere Thunderstorm WarningOUNGarvin, Pontotoc75 min
Jun 23, 5:20 PM CDTSevere Thunderstorm WarningOUNHughes40 min
Jun 23, 5:58 PM CDTSevere Thunderstorm WarningOUNCoal, Johnston, Pontotoc62 min
Jun 23, 5:58 PM CDTSevere Thunderstorm WarningOUNHughes62 min
Jun 23, 5:58 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes, Pontotoc37 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1991Every severe thunderstorm warning in 1991

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.