Alert archive / Oklahoma / Tornado Warnings in 1991

Tornado Warning 7, NWS Norman, OK

March 21, 1991Johnston County, Oklahoma

NWS Norman, OK issued this tornado warning at Mar 21, 1991, 5:58 PM CST for Johnston County, Oklahoma. It was in force for 32 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
Mar 21, 1991, 5:58 PM CST (23:58 UTC)
Expired
Mar 21, 1991, 6:30 PM CST
In force
32 min
Issued by
NWS Norman, OK
Area
Whole counties

County Johnston County, OK

What was reported inside it

TimeReportWhereRemark
Mar 21, 6:14 PM CSTTornado F0Johnston, 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, 12.0 hours before the alert went out and 121 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 1991-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 279 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 1991-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939587897117136156Sfc1 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
279 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
1274 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
-29 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.0

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.

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, Mar 21, 3:31 PM CST, 2 hours 27 minutes before
TXZ020-019-212230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
330 PM CST THU MAR 21 1991

TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF
NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA.

SEVERE THUNDERSTORM WARNING FOR CLAY COUNTY EXPIRED AT 330 PM CST.

AT 330 PM CST RADAR INDICATED SCATTERED THUNDERSHOWERS IN CLAY CLUNTY
MOVING NORTHEAST AT 40 MPH AND WILL BE MOVING INTO OKLAHOMA.

BETWEEN 1PM AND 3PM HAIL FROM DIME TO GOLF BALL SIZE FELL ON
WILBARGER..ARCHER..WICHITA AND CLAY COUNTIES.
Local storm report, Mar 21, 3:39 PM CST, 2 hours 19 minutes before
LATE STORM REPORT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
3:40 PM CST THU MAR 22 1991

1:44 PM CST DIME SIZE HAIL- OKLAUNION (WILBARGER CO.)

1:50 PM CST 1 INCH HAIL- SCOTLAND (ARCHER CO)

2:02 PM CST DIME SIZE HAIL- IOWA PARK (WICHITA CO)

2:03 PM CST DIME SIZE HAIL- 6 S. HENRIETTA (CLAY CO)

2:08 PM CST GOLF BALL SIZE HAIL- HORSESHOE BEND (S. WICHITA CO)

2:08 PM CST DIME SIZE HAIL- JUST S OF HENRIETTA (CLAY CO)

2:12 PM CST QUARTER SIZEz HAIL- HENRIETTA (CLAY CO)

2:14 PM CST DIME SIZE HAIL- JUST S OF LAKE WICHITA (ARCHER CO)
2:35 PM CST GOLF BALL SIZE HAIL- JUST S OF LAKE WICHITA (ARCHER CO)
Special weather statement, Mar 21, 4:01 PM CST, 1 hour 57 minutes before
TXZ020-019-212300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
400 PM CST THU MAR 21 1991

TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF
NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR
CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL
9PM CST THIS THURSDAY EVENING.

AT 400 PM...THE WICHITA FALLS RADAR SHOWED A CLUSTER OF THUNDERSTORMS
OVER PORTIONS OF YOUNG AND JACK COUNTIES. MOVEMENT WAS NORTHEAST AT
40 MPH. THUNDERSTORMS THAT AFFECTED PORTIONS OF CLAY AND MONTAGUE
COUNTIES EARLIER HAVE MOVED INTO OKLAHOMA.

HOWEVER...PERSONS IN CLAY AND MONTAGUE COUNTIES SHOULD EXPECT
ADDITIONAL THUNDERSTORM ACTIVITY IN THE NEXT HOUR. BRIEF PERIODS
OF VERY HEAVY RAIN...GUSTY SURFACE WIND AND POSSIBLE SMALL HAIL
SHOULD BE EXPECTED. SCOTLAND IN EASTERN ARCHER COUNTY REPORTED
.62 HUNDREDS WITH SIGNIFICANT HAIL EARLIER THIS AFTERNOON.
Special weather statement, Mar 21, 4:32 PM CST, 1 hour 26 minutes before
TXZ020-019-212330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
430 PM CST THU MAR 21 1991

TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF
NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR
CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL
9PM CST THIS THURSDAY EVENING.

AT 430 PM...THE WICHITA FALLS RADAR SHOWED THUNDERSTORMS IN PROGRESS
PRODUCING LOCALLY VERY HEAVY RAIN...GUSTY WIND AND POSSIBLE SMALL
HAIL OVER PORTIONS OF CLAY AND MONTAGUE COUNTIES. THE HEAVIEST PORTION
WAS LOCATED ALONG THE CLAY/MONTAGUE BORDER JUST SOUTH OF THE RED RIVER.

ELSEWHERE...ANOTHER DEVELOPING THUNDERSTORM WAS NOTED NEAR OLNEY
ALONG THE YOUNG/ARCHER COUNTY LINE. MOVEMENT WAS NORTHEAST AT 40
MPH.

TODAYS HIGH TEMPERATURE WAS 82 DEGREES.
Special weather statement, Mar 21, 5:03 PM CST, 55 minutes before
TXZ020-019-220000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
500 PM CST THU MAR 21 1991

TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF
NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR
CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL
9PM CST THIS THURSDAY EVENING.

AT 500 PM...THE HEAVIEST THUNDERSTORM ACTIVITY WAS OCCURRING IN NORTHERN
MONTAGUE COUNTY. PERSONS ALLONG AND NORTH OF US82 IN MONTAGUE COUNTY...
INCLUDING THE COMMUNITIES OF SAINT JO AND NACONA SHOULD EXPECT VERY
HEAVY THUNDERSTORM TYPE WEATHER IN THE NEXT 30 MINUTES.

ELSEWHERE...ANOTHER HEAVY THUNDERSTORM WAS OCCURRING ALONG THE ARCHER/
CLAY COUNTY LINE EAST OF ARCHER CITY. MOVEMENT OF THESE THUNDERSTORMS
WAS NORTHEAST AT 40 MPH. ONLY A SCATTERING OF LIGHTER THUNDERSHOWERS
WERE NOTED BETWEEN ABILINE...YOUNG AND JACK COUNTIES.
Special weather statement, Mar 21, 5:28 PM CST, 30 minutes before
TXZ020-019-220025-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
525 PM CST THU MAR 21 1991

TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF
NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR
CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL
9PM CST THIS THURSDAY EVENING.

AT 530 PM...THE HEAVIEST THUNDERSTORM WAS OCCURRING BETWEEN ARDMORE
OKLAHOMA AND THE RED RIVER. MOVEMENT OF THIS THUNDERSTORM WAS EAST
NORTHEAST AT 35 MPH.

ELSEWHERE...THUNDERSTORMS PRODUCING VERY HEAVY RAIN...FREQUENT
LIGHTNING...GUSTY WINDS AND SMALL HAIL WERE NOTED ALONG AND SOUTHEAST
OF A HENRIETTA...ARCHER CITY...OLNEY LINE. MOVEMENT WAS TOWARDS THE
NORTHEAST. PERSONS IN MONTAGUE...CLAY AND ARCHER COUNTIES SHOULD
EXPECT PERSISTENT THUNDERSTORM ACTIVITY FOR THE NEXT SEVERAL HOURS.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 11:55 AM CSTSevere Thunderstorm WarningOUNJefferson50 min
Mar 21, 12:10 PM CSTSevere Thunderstorm WarningOUNJohnston50 min
Mar 21, 12:16 PM CSTSevere Thunderstorm WarningOUNCarter29 min
Mar 21, 12:20 PM CSTSevere Thunderstorm WarningOUNStephens25 min
Mar 21, 12:33 PM CSTSevere Thunderstorm WarningOUNCarter27 min
Mar 21, 12:50 PM CSTSevere Thunderstorm WarningOUNCleveland, Pottawatomie40 min
Mar 21, 12:51 PM CSTSevere Thunderstorm WarningOUNGrady44 min
Mar 21, 12:52 PM CSTSevere Thunderstorm WarningOUNGarvin53 min
Mar 21, 12:53 PM CSTSevere Thunderstorm WarningOUNJefferson52 min
Mar 21, 12:57 PM CSTSevere Thunderstorm WarningOUNCoal, Johnston, Pontotoc48 min
Mar 21, 1:02 PM CSTSevere Thunderstorm WarningOUNComanche43 min
Mar 21, 1:06 PM CSTSevere Thunderstorm WarningOUNTillman69 min
Mar 21, 1:14 PM CSTSevere Thunderstorm WarningOUNCarter46 min
Mar 21, 1:20 PM CSTSevere Thunderstorm WarningOUNMcClain40 min
Mar 21, 1:25 PM CSTSevere Thunderstorm WarningOUNHughes, Seminole50 min
Mar 21, 1:27 PM CSTSevere Thunderstorm WarningOUNCleveland48 min
Mar 21, 1:48 PM CSTSevere Thunderstorm WarningOUNPontotoc, Pottawatomie, Seminole42 min
Mar 21, 2:05 PM CSTSevere Thunderstorm WarningOUNComanche, Cotton, Grady40 min
Mar 21, 2:15 PM CSTSevere Thunderstorm WarningOUNCleveland, McClain45 min
Mar 21, 2:19 PM CSTSevere Thunderstorm WarningOUNJefferson41 min
Mar 21, 2:38 PM CSTSevere Thunderstorm WarningOUNJefferson, Stephens52 min
Mar 21, 2:40 PM CSTSevere Thunderstorm WarningOUNHughes, Pontotoc, Seminole50 min
Mar 21, 2:52 PM CSTSevere Thunderstorm WarningOUNOklahoma38 min
Mar 21, 3:02 PM CSTSevere Thunderstorm WarningOUNGarvin, Grady, Stephens43 min
Mar 21, 3:11 PM CSTSevere Thunderstorm WarningOUNCarter49 min
Mar 21, 3:24 PM CSTSevere Thunderstorm WarningOUNJefferson36 min
Mar 21, 3:32 PM CSTSevere Thunderstorm WarningOUNCleveland, McClain43 min
Mar 21, 3:40 PM CSTSevere Thunderstorm WarningOUNLove35 min
Mar 21, 3:43 PM CSTSevere Thunderstorm WarningOUNGarvin47 min
Mar 21, 3:48 PM CSTSevere Thunderstorm WarningOUNLincoln42 min
Mar 21, 3:59 PM CSTSevere Thunderstorm WarningOUNCarter, Johnston61 min
Mar 21, 4:08 PM CSTSevere Thunderstorm WarningOUNPontotoc, Pottawatomie, Seminole52 min
Mar 21, 4:08 PM CSTSevere Thunderstorm WarningOUNMcClain52 min
Mar 21, 4:39 PM CSTTornado WarningOUNJohnston, Marshall36 min
Mar 21, 4:42 PM CSTSevere Thunderstorm WarningOUNLove48 min
Mar 21, 4:47 PM CSTTornado WarningOUNHughes, Pontotoc28 min
Mar 21, 4:55 PM CSTTornado WarningOUNAtoka35 min
Mar 21, 5:15 PM CSTSevere Thunderstorm WarningOUNCarter, Love45 min
Mar 21, 5:20 PM CSTTornado WarningOUNCarter, Love25 min
Mar 21, 5:26 PM CSTTornado WarningOUNAtoka34 min
Mar 21, 5:36 PM CSTTornado WarningOUNMarshall39 min
Mar 21, 5:52 PM CSTSevere Thunderstorm WarningOUNPushmataha68 min

Nearby

Tornado Warnings in Oklahoma, 1991Every tornado warning in 1991Tornadoes 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.