Alert archive / Oklahoma / Tornado Warnings in 1992

Tornado Warning 11, NWS Norman, OK

April 18, 1992Harmon County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 18, 1992, 6:49 PM CDT for Harmon County, Oklahoma. It was in force for 41 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
Apr 18, 1992, 6:49 PM CDT (23:49 UTC)
Expired
Apr 18, 1992, 7:30 PM CDT
In force
41 min
Issued by
NWS Norman, OK
Area
Whole counties

County Harmon County, OK

What was reported inside it

TimeReportWhereRemark
Apr 18, 7:21 PM CDTHail 1Harmon, 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.8 hours before the alert went out and 177 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, Amarillo Airport, TX at 12:00Z on 1992-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Amarillo Airport, TX at 12:00Z on 1992-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
254 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 182350
TOROKC
OKC057-190030-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
649 PM CDT SAT APR 18 1992
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  730 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN SOUTHWEST OKLAHOMA
 
   ...HARMON COUNTY
 
AT 649 PM RADAR INDICATED A DEVELOPING TORNADO 7 MILES NORTH OF HOLLIS
MOVING EAST SOUTHEAST AT 20 MPH. PEOPLE IN MCKNIGHT ARE IN THE PATH OF
THIS DEVELOPING TORNADO.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

What forecasters said that day

The local office's own words before this tornado 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, Apr 18, 1:00 PM CDT, 5 hours 49 minutes before
OKZ004>021-191200-

OKLAHOMA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1 PM CDT SAT APR 18 1992

THIS OUTLOOK APPLIES ONLY TO OKLAHOMA ZONES 4 THROUGH 21.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF
CENTRAL AND WESTERN OKLAHOMA THIS EVENING AND TONIGHT WEST OF A
PONCA CITY TO WETUMKA TO MADILL LINE.

A STORM SYSTEM ACROSS NORTH TEXAS IS SPREADING WIDESPREAD CLOUDINESS
AS WELL AS SHOWER AND THUNDERSTORM ACTIVITY IN THAT AREA. THE LATEST
COMPUTER FORECASTS INDICATE THAT THIS SYSTEM WILL TAKE AWAY MUCH OF
THE MOIST UNSTABLE AIR WHICH WAS EXPECTED TO FEED A SECOND STORM
SYSTEM APPROACHING FROM THE WEST TODAY. THIS FIRST UPPER STORM SYSTEM
WILL MOVE NORTH INTO EASTERN OKLAHOMA DURING THE AFTERNOON AND CONTINUE
THE CLOUDS AND SCATTERED THUNDERSTORMS TO CENTRAL AND EASTERN OKLAHOMA.
A DRYLINE IS CURRENTLY LOCATED ACROSS THE EASTERN OKLAHOMA PANHANDLE AND
THE TEXAS PANHANDLE.

ACROSS NORTHWEST OKLAHOMA AND PORTIONS OF THE TEXAS PANHANDLE THE SKIES
HAVE CLEARED...ALLOWING THE TEMPERATURES TO RISE AND THE AIR TO BECOME
MORE UNSTABLE...BUT EVEN HERE THE AIR IS MARGINALLY UNSTABLE. SOME
STORMS MAY FIRE ALONG THE DRYLINE THIS AFTERNOON BUT MAY NOT BECOME
SEVERE UNTIL COOLER AIR IN THE UPPER LEVELS MAKES THE AIR CONSIDERABLY
MORE UNSTABLE LATER THIS EVENING. THESE STORMS ARE THEN EXPECTED TO
MOVE INTO THE EASTERN PART OF THE THREAT AREA OVERNIGHT.

OF GREATER CONCERN IS THE POSSIBILITY OF A SIGNIFICANT OUTBREAK OF
STORMS EASTER SUNDAY...INCLUDING SUPERCELLS WITH TORNADOES... ACROSS THE
EASTERN PORTION OF THE FORECAST AREA...FROM A BLACKWELL TO ARDMORE LINE
EASTWARD. THE CONDITIONS SHOULD BE CONSIDERABLY MORE FAVORABLE FOR
SEVERE STORM DEVELOPMENT WITH MUCH GREATER INSTABILTY
THROUGH THE ATMOSPHERE..AN ADVANCING SURFACE FRONT...AND A POWERFUL
UPPER LEVEL STORM SYSTEM. THE NATIONAL WEATHER SERVICE WILL
CONTINUE TO PROVIDE UPDATES ON THE SEVERE WEATHER POTENTIAL AS
MORE INFORMATION IS AVAILABLE. LISTEN TO RADIO AND TELEVISION... OR NOAA
WEATHER RADIO... FOR UPDATES.

EMERGENCY MANAGEMENT OFFICIALS ACROSS CENTRAL AND WESTERN OKLAHOMA
SHOULD KEEP UP WITH THE LATEST FORECASTS AND BE PREPARED FOR POMSSIBLE
ACTIVATION LATER THIS EVENING AND TONIGHT...AND EMERGENCY MANAGEMENT
OFFICIALS IN THE REMANINDER OF THE FORECAST AREA SHOULD BE ALERT
FOR THE POSSIBILITY OF SEVERE WEATHER SUNDAY.

JKP
Special weather statement, Apr 18, 3:44 PM CDT, 3 hours 5 minutes before
TXZ019-020-182130

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
345 PM CDT SAT APR 18 1992

...A TORNADO WATCH WILL BE IN EFFECT FROM 430 PM CDT TO 11 PM CDT FOR
THE FOLLOWING NORTH CENTRAL TEXAS COUNTIES...ARCHER...BAYLOR...CLAY...
FOARD...HARDEMAN...KNOX...WICHITA...WILBARGER AND YOUNG.

NO PRECIPITION WAS INDICATED BY THE WICHITA FALLS RADAR AT 345 PM CDT.

DURING THE NEXT ONE TO TWO HOURS...SIGNIFICANT CONVECTION IS EXPECTED
TO FORM ALONG A DRY LINE IN WEST TEXAS.

VERY UNSTABLE CONDITIONS PREVAIL THIS AFTERNOON ACROSS THE REGION.
BY SUNSET...THUNDERSTORMS ARE EXPECTED TO BE AFFECTING THE WESTERN
SECTIONS OF NORTH CENTRAL TEXAS.

AREA RESIDENTS SHOULD PREPARE FZOR SEVERE WEATHER PARAMETERS IN WICHITA
FALLS AND THE SURROUNDING COUNTY AREA TONIGHT.
Special weather statement, Apr 18, 4:25 PM CDT, 2 hours 24 minutes before
OKZ004>021-191200-

OKLAHOMA THUNDERSTORM OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
420 PM CDT SAT APR 18 1992

THIS OUTLOOK APPLIES ONLY TO OKLAHOMA ZONES 4 THROUGH 21.

...TORNADO WATCH FOR MUCH OF WESTERN AND NORTHERN OKLAHOMA FROM 430 PM
TIL 11 PM.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF
CENTRAL AND WESTERN OKLAHOMA THIS EVENING AND TONIGHT WEST OF A
PONCA CITY TO WETUMKA TO MADILL LINE.

A STRONG UPPER LEVEL SYSTEM WHICH WAS EXPECTED TO MOVE ACROSS OKLAHOMA
THIS EVENING AND TONIGHT WAS LOCATED IN NORTHWESTERN ARIZONA AT 4 PM.
EXTENSIVE CLOUDINESS AND RELATIVELY MILD CONDITIONS PREVAILED ACROSS
MUCH OF CENTRAL AND WESTERN OKLAHOMA WHICH WAS RESULTING IN A MARGINALLY
UNSTABLE ATMOSPHERE. THE EXCEPTION WAS IN THE SOUTHWEST...WHERE MOSTLY
SUNNY SKIES HAVE ALLOWED TEMPERATURES TO WARM INTO THE MID 70S AND THE
ATMOSPHERE WAS A LITTLE MORE UNSTABLE. A VERY SLOW MOVING COLD FRONT
WAS LOCATED FROM EXTREME NORTHWESTERN OKLAHOMA INTO WESTERN TEXAS AT
4 PM.

A FEW THUNDERSTORMS MAY DEVELOP ALONG THE COLD FRONT IN NORTHWESTERN
OKLAHOMA AND IN NORTHWESTERN TEXAS DURING THE NEXT COUPLE OF HOURS. A
FEW THUNDERSTORMS MAY BECOME SEVERE AS THEY MOVE NORTHEASTWARD THROUGH
WESTERN OKLAHOMA THIS EVENING. IT CURRENTLY APPEARS THAT THE BEST CHANCE
FOR SEVERE THUNDERSTORMS AND AN ISOLATED TORNADO IS IN EXTREME SOUTHWEST
OKLAHOMA.

OF MUCH GREATER CONCERN IS THE POSSIBILITY OF A SIGNIFICANT OUTBREAK OF
STORMS EASTER SUNDAY...INCLUDING SUPERCELLS WITH TORNADOES... ACROSS THE
EASTERN PORTION OF THE FORECAST AREA...FROM A BLACKWELL TO ARDMORE LINE
EASTWARD. THE CONDITIONS SHOULD BE CONSIDERABLY MORE FAVORABLE FOR
SEVERE STORM DEVELOPMENT WITH MUCH GREATER INSTABILTY THROUGH THE
ATMOSPHERE..AN ADVANCING SURFACE FRONT...AND THE STRONG UPPER LEVEL
STORM SYSTEM. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO PROVIDE
UPDATES ON THE SEVERE WEATHER POTENTIAL AS MORE INFORMATION IS
AVAILABLE.  LISTEN TO RADIO AND TELEVISION...OR NOAA WEATHER RADIO...
FOR UPDATES.
Special weather statement, Apr 18, 4:47 PM CDT, 2 hours 2 minutes before
TXZ019-020-182245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
445 PM CDT SAT APR 18 1992

...A TORNADO WATCH WILL BE IN EFFECT FROM 430 PM CDT TO 11 PM CDT FOR
THE FOLLOWING NORTH CENTRAL TEXAS COUNTIES...ARCHER...BAYLOR...CLAY...
FOARD...HARDEMAN...KNOX...WICHITA...WILBARGER AND YOUNG.

AT 445 PM THE WICHITA WICHITA FALLS RADAR SHOWED THUNDERSTORMS BEGINNING
TO DEVELOP OVER THE TEXAS SOUTH PLAINS BETWEEN GUTHRIE AND GIRARD.
THUNDERSTORMS WERE DEVELOPING ALONG THE DRYLINE/COLD FRONT THAT WAS FROM
CHILDRESS TO EAST OF LUBBOCK TO EAST OF MIDLAND.

MOVEMENT OF THUNDERSTORMS NORTHEAST AT 15 MPH.

RESIDENTS IN AND NEAR THE WATCH AREA SHOULD CONTINUE TO MONITOR THIS
PO2TENTIALLY DANGEROUS WEATHER SITUATION. REMEMBER...A TORNADO WATCH MEANS
CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS AND TORNADOES TO DEVELOP
IN AND CLOSE TO THE WATCH AREA
Special weather statement, Apr 18, 4:51 PM CDT, 1 hour 58 minutes before
TXZ019-020-182245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
445 PM CDT SAT APR 18 1992

...A TORNADO WATCH IS IN EFFECT UNTIL 1100 PM CDT FOR THE FOLLOWING
NORTH CENTRAL TEXAS COUNTIES...ARCHER...BAYLOR...CLAY...FOARD...HARDEMAN
...KNOX...WICHITA...WILBARGER AND YOUNG AND COTTON COUNTY OF OKLAHOMA...

AT 445 PM THE WICHITA FALLS RADAR SHOWED THUNDERSTORMS BEGINNING TO
DEVELOP OVER THE TEXAS SOUTH PLAINS BETWEEN GUTHRIE AND GIRARD.
THUNDERSTORMS WERE DEVELOPING ALONG THE DRYLINE/COLD FRONT THAT WAS FROM
CHILDRESS TO EAST OF LUBBOCK TO EAST OF MIDLAND.

MOVEMENT OF THUNDERSTORMS NORTHEAST AT 15 MPH.

RESIDENTS IN AND NEAR THE WATCH AREA SHOULD CONTINUE TO MONITOR THIS
POTENTIALLY DANGEROUS WEATHER SITUATION. REMEMBER...A TORNADO WATCH MEANS
CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS AND TORNADOES TO DEVELOP
IN AND CLOSE TO THE WATCH AREA.
Special weather statement, Apr 18, 5:51 PM CDT, 58 minutes before
TXZ019-020-182350-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
550 PM CDT THU APR 16 1992

...TORNADO WATCH IN EFFECT UNTIL 1100 PM CDT FOR THE FOLLOWING NORTH
CENTRAL TEXAS COUNTIES FOARD...HARDEMAN...KNOX...WILBARGER...BAYLOR...
WICHITA...ARCHER...YOUNG...CLAY AND INCLUDES COTTON COUNTY OF SOUTH
CENTRAL OKLAHOMA...

AT 550 PM THE WICHITA FALLS RADAR SHOWED A LINE OF STRONG THUNDERSTORMS
FROM SOUTH OF GAGE OKLAHOMA EXTENDING SOUTHWEST TO WHEELER TO WEST OF
CHILDRESS TEXAS. MOVEMENT OF THUNDERSTORMS NORTHEAST AT 25 MPH.

RADAR ALSO SHOWED THUNDERSTORMS WEST OF ROCHESTER IN HASKELL COUNTY TO
ROTAN AND SOUTH OF HASKELL. MOVEMENT OF THESE THUNDERSTORMS EAST AT 25 MPH.

RESIDENTS OF HARDEMAN COUNTY MAY SEE STRONG THUNDERSTORM ACTIVITY IN THE
NEXT ONE TO TWO HOURS AS THE LINE CONTINUES TO BUILD SOUTHWARD.

RESIDENTS OF NORTH CENTRAL TEXAS SHOULD CONTINUE TO MONITOR THE LATEST
WEATHER CONDITIONS AND BE READY TO THAKE ACTION SHOULD SEVERE WEATHER BE
SIGHTED OR WARNING ISSUED.

STAY TUNED TO NOAA WEATHER RADIO FOR THIS DANGEROUS WEATHER SITUATION.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 6:21 PM CDTSevere Thunderstorm WarningOUNHarmon39 min

Nearby

Tornado Warnings in Oklahoma, 1992Every tornado warning in 1992Tornadoes 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.