Alert archive / Oklahoma / Tornado Warnings in 1991
Tornado Warning 3, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Mar 21, 1991, 4:55 PM CST for Atoka County, Oklahoma. It was in force for 35 min. 3 reports 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, 4:55 PM CST (22:55 UTC)
- Expired
- Mar 21, 1991, 5:30 PM CST
- In force
- 35 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Atoka County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 21, 5:10 PM CST | Tornado F2 | Atoka, OK | |
| Mar 21, 5:30 PM CST | Hail 2.5 | Atoka, OK | |
| Mar 21, 5:30 PM CST | Hail 1.25 | Atoka, 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, 10.9 hours before the alert went out and 156 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.
- 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
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, 1:01 PM CST, 3 hours 54 minutes before
TXZ020-019-212045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 1245 PM CST THU MAR 21 1991 ...TORNADO WATCH FOR PORTIONS OF NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA UNTIL 6PM CST... A TORNADO WATCH IS IN EFFECT UNTIL 6PM CST FOR ARCHER..BAYLOR..CLAY..FOARD..HARDEMAN..JACK..KNOX..MONTAGUE..WICHITA ..WILBARGER AND YOUNG COUNTIES OF NORTH CENTRAL TEXAS AND INCLUDES COTTON COUNTY OF SOUTHERN OKLAHOMA. AT 1240 PM CST RADAR INDICATED THUNDERSTORMS WERE DEVELOPING ALONG A LINE FROM ABILENE TEXAS TO VERNON NORTHEASTWARD TO EAST OF OKLAHOMA CITY. MOVEMENT WAS NORTHEAST AT 35 MPH. THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND EVENING ACROSS THIS PORTION OF NORTH CENTRAL TEXAS AND INTENSITY ...POSSIBLY PRODUCING TORNADOES. STAY ALERT FOR CHANGING WEATHER CONDITIONS AND BE PREPARED TO TAKE COVER IMMEDIATELY IF A WARNING IS ISSUED OR THREATENING WEATHER IS SIGHTED.
Special weather statement, Mar 21, 1:09 PM CST, 3 hours 46 minutes before
OKZ004>021-221200- OKLAHOMA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 110 PM CST THU MAR 21 1991 THIS THUNDERSTORM OUTLOOK IS VALID ONLY FOR OKLAHOMA ZONES 4 THROUGH 21. A THUNDERSTORM OUTLOOK FOR THE OKLAHOMA AND TEXAS PANHANDLES IS AVAILABLE UNDER LBBSPSAMA...AND A THUNDERSTORM OUTLOOK FOR EASTERN OKLAHOMA IS AVAILABLE UNDER OKCSPSTUL. TORNADO WATCH NUMBER 39 IS IN EFFECT UNTIL 6 PM FOR SOUTHWEST THROUGH CENTRAL OKLAHOMA...AND TORNADO WATCH 40 IS IN EFFECT UNTIL 7 PM FOR EASTERN OKLAHOMA. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON INTO EARLY EVENING. THE GREATEST THREAT IS TO THE RIGHT OF A ALTUS-PONCA CITY LINE THUNDERSTORMS WITH LARGE HAIL...AND TORNADOES ARE THE GREATEST THREAT FROM THIS SYSTEM. THIS AFTERNOON A STRONG LOW PRESSURE AREA WAS DEVELOPING IN WESTERN KANSAS. A DRY LINE WAS DEVELOPING FROM WEST OF ALTUS TO JUST WEST OF PONCA CITY. SOME STORMS HAVE ALREADY BEEN FIRING IN SEVERAL LINES ACROSS SOUTH CENTRAL OKLAHOMA BETWEEN HUGHES AND TILLLMAN COUNTIES. STORMS ARE EXPECTED TO BEGIN MOVING INTO OR DEVELOPING INTO THE CENTRAL PORTIONS OF THE STATE BETWEEN THE NEXT 1 TO 2 HOURS. AS THE DRYLINE ADVANCES EAST THESE STORMS ARE EXPECTED TO MOVE RAPIDLY NORTHEAST AND POSSIBLY AFFECT NORTH CENTRAL OKLAHOMA BY MID AFTERNOON. LOOKING AHEAD...THE DRYLINE PASSAGE WILL END THE THREAT OF SEVERE THUNDERSTORMS FOR MID EVENING INTO TOMORROW MORNING. WE RECOMMEND SPOTTER GROUPS ACROSS SOUTHWESTERN AND CENTRAL OKLAHOMA BE ACTIVATED NOW .
Special weather statement, Mar 21, 3:31 PM CST, 1 hour 24 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, 1 hour 16 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, 54 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, 23 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.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 11:55 AM CST | Severe Thunderstorm Warning | OUN | Jefferson | 50 min |
| Mar 21, 12:10 PM CST | Severe Thunderstorm Warning | OUN | Johnston | 50 min |
| Mar 21, 12:16 PM CST | Severe Thunderstorm Warning | OUN | Carter | 29 min |
| Mar 21, 12:20 PM CST | Severe Thunderstorm Warning | OUN | Stephens | 25 min |
| Mar 21, 12:33 PM CST | Severe Thunderstorm Warning | OUN | Carter | 27 min |
| Mar 21, 12:50 PM CST | Severe Thunderstorm Warning | OUN | Cleveland, Pottawatomie | 40 min |
| Mar 21, 12:51 PM CST | Severe Thunderstorm Warning | OUN | Grady | 44 min |
| Mar 21, 12:52 PM CST | Severe Thunderstorm Warning | OUN | Garvin | 53 min |
| Mar 21, 12:53 PM CST | Severe Thunderstorm Warning | OUN | Jefferson | 52 min |
| Mar 21, 12:57 PM CST | Severe Thunderstorm Warning | OUN | Coal, Johnston, Pontotoc | 48 min |
| Mar 21, 1:02 PM CST | Severe Thunderstorm Warning | OUN | Comanche | 43 min |
| Mar 21, 1:06 PM CST | Severe Thunderstorm Warning | OUN | Tillman | 69 min |
| Mar 21, 1:14 PM CST | Severe Thunderstorm Warning | OUN | Carter | 46 min |
| Mar 21, 1:20 PM CST | Severe Thunderstorm Warning | OUN | McClain | 40 min |
| Mar 21, 1:25 PM CST | Severe Thunderstorm Warning | OUN | Hughes, Seminole | 50 min |
| Mar 21, 1:27 PM CST | Severe Thunderstorm Warning | OUN | Cleveland | 48 min |
| Mar 21, 1:48 PM CST | Severe Thunderstorm Warning | OUN | Pontotoc, Pottawatomie, Seminole | 42 min |
| Mar 21, 2:05 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Grady | 40 min |
| Mar 21, 2:15 PM CST | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 45 min |
| Mar 21, 2:19 PM CST | Severe Thunderstorm Warning | OUN | Jefferson | 41 min |
| Mar 21, 2:38 PM CST | Severe Thunderstorm Warning | OUN | Jefferson, Stephens | 52 min |
| Mar 21, 2:40 PM CST | Severe Thunderstorm Warning | OUN | Hughes, Pontotoc, Seminole | 50 min |
| Mar 21, 2:52 PM CST | Severe Thunderstorm Warning | OUN | Oklahoma | 38 min |
| Mar 21, 3:02 PM CST | Severe Thunderstorm Warning | OUN | Garvin, Grady, Stephens | 43 min |
| Mar 21, 3:11 PM CST | Severe Thunderstorm Warning | OUN | Carter | 49 min |
| Mar 21, 3:24 PM CST | Severe Thunderstorm Warning | OUN | Jefferson | 36 min |
| Mar 21, 3:32 PM CST | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 43 min |
| Mar 21, 3:40 PM CST | Severe Thunderstorm Warning | OUN | Love | 35 min |
| Mar 21, 3:43 PM CST | Severe Thunderstorm Warning | OUN | Garvin | 47 min |
| Mar 21, 3:48 PM CST | Severe Thunderstorm Warning | OUN | Lincoln | 42 min |
| Mar 21, 3:59 PM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston | 61 min |
| Mar 21, 4:08 PM CST | Severe Thunderstorm Warning | OUN | Pontotoc, Pottawatomie, Seminole | 52 min |
| Mar 21, 4:08 PM CST | Severe Thunderstorm Warning | OUN | McClain | 52 min |
| Mar 21, 4:39 PM CST | Tornado Warning | OUN | Johnston, Marshall | 36 min |
| Mar 21, 4:42 PM CST | Severe Thunderstorm Warning | OUN | Love | 48 min |
| Mar 21, 4:47 PM CST | Tornado Warning | OUN | Hughes, Pontotoc | 28 min |
| Mar 21, 5:15 PM CST | Severe Thunderstorm Warning | OUN | Carter, Love | 45 min |
| Mar 21, 5:20 PM CST | Tornado Warning | OUN | Carter, Love | 25 min |
| Mar 21, 5:26 PM CST | Tornado Warning | OUN | Atoka | 34 min |
| Mar 21, 5:36 PM CST | Tornado Warning | OUN | Marshall | 39 min |
| Mar 21, 5:52 PM CST | Severe Thunderstorm Warning | OUN | Pushmataha | 68 min |
| Mar 21, 5:58 PM CST | Tornado Warning | OUN | Johnston | 32 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.