Alert archive / Oklahoma / Tornado Warnings in 1990
Tornado Warning 16, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Apr 9, 1990, 10:26 PM CDT for Cotton County, Oklahoma. It was in force for 49 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 9, 1990, 10:26 PM CDT (03:26 UTC)
- Expired
- Apr 9, 1990, 11:15 PM CDT
- In force
- 49 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Cotton County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 9, 10:45 PM CDT | Hail 1 | Cotton, 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
Fort Sill, OK (KFSI), launched 00:00Z, 3.4 hours before the alert went out and 40 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
- 872 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 692 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 100328 TOROKC OKC033-100415- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 1026 PM CDT MON APR 9 1990 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1115 PM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN SOUTHWEST OKLAHOMA ...NORTHERN COTTON COUNTY AT 1026 PM CDT RADAR INDICATED A POSSIBLE TORNADO 13 MILES WEST OF WALTERS MOVING TOWARD THE EAST AT 25 MPH. 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 BLANRKETS...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 9, 4:42 PM CDT, 5 hours 44 minutes before
TXZALL-092245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 442 PM CDT MON APR 9 1990 ...TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT THIS MONDAY EVENING FOR A LARGE PORTION OF NORTHWESTERN TEXAS AND PORTIONS OF SOUTHWESTERN AND SOUTH CENTRAL OKLAHOMA... AT 430 PM CDT RADAR INDICATED THUNDERSTORMS WERE RAPIDLY FORMING ACROSS THE AREA. IN OKLAHOMA THE STRONGEST THUNDERSTORM WAS NEAR DUNCAN. IN TEXAS THUNDERSTORMS WERE DEVELOPING FROM SOUTHWEST OF WICHITA FALLS TO ABILENE. THE STRONGEST THUNDERSTORMS WERE ENTERING SOUTHERN ARCHER COUNTY AND SHOULD MOVE SOUTHEAST OF ARCHER CITY. MOVEMENT WAS NORTHEAST AT 25 MPH. REMEMBER A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS TO DEVELOP IN AND NEAR THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS OR POSSIBLE WARNINGS.
Special weather statement, Apr 9, 5:34 PM CDT, 4 hours 52 minutes before
TXZALL-092330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 534 PM CDT MON APR 9 1990 ...TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT THIS MONDAY AFTERNOON AND EVENING FOR THIS PORTION OF NORTH CENTRAL TEXAS AND SOUTHWESTERN OKLAHOMA... AT 530 CDT RADAR INDICATED A FEW THUNDERSHOWERS..DECREASING IN INTENSITY..ACROSS YOUNG AND SOUTHERN ARCHER COUNTIES. IN OKLAHOMA VERY STRONG THUNDERSTORMS WERE WELL NORTHEAST OF WIICHITA FALLS FROM ALEX TO PURCELL. MOVEMENT WAS NORTHEAST AT 25 MPH. REMEMBER A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS TO DEVELOP IN AND NEAR THE WATCH AREA. BE ALERT TO THREATENING WEATHER CONDITIO@NS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 9, 6:27 PM CDT, 3 hours 59 minutes before
TXZALL-100030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 628 PM CDT MON APR 9 1990 A TORNADO WATCH REMAINS IN EFFECT FOR THIS PORTION OF NORTH CENTRAL TEXAS AND SOUTHWESTERN OKLAHOMA UNTIL 10 PM CDT THIS MONDAY AFTERNOON AND EVENING... AT 625 PM CDT RADAR INDICATED LIGHT RAIN SHOWERS IN YOUNG AND JACK COUNTIES. VERY STRONG THUNDERSTORMS WERE NORTH OF ABILENE AND BETWEEN LUBBOCK AND CHILDRESS. MOVEMENT WAS NORTHEAST AT 30 MPH. IN OKLAHOMA SEVERE THUNDERSTORMS WERE NORTH AND EAST OF GAGE MOVING EAST AT 30 MPH. REMEMBER..A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS TO DEVELOP IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Local storm report, Apr 9, 7:11 PM CDT, 3 hours 15 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
710 PM CDT MON APR 9 1990
TIME(CDT) COUNTY EVENT
555 PM WOODS NICKEL SIZED HAIL ON THE WEST SIDE OF ALVA.
620 PM HARPER ROTATING WALL CLOUD 4 TO 5 MILES NORTH OF
FORT SUPPLY.
625 PM HARPER NICKEL SIZED HAIL 18 MILES SOUTHEAST OF
BUFFALO.
645 PM WOODS QUARTER SIZED HAIL AT WAYNOKA.
650 PM ALFALFA .75 INCH HAIL 1/4 MILE EAST OF THE ALFALFA
COUNTY-WOODS COUNTY LINE ON HIGHWAY 64.
705 PM ALFALFA GOLFBALL SIZED HAIL NORTH AND WEST OF
CHEROKEE.The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:01 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa | 44 min |
| Apr 9, 7:45 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant | 60 min |
| Apr 9, 7:45 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 60 min |
| Apr 9, 8:30 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 60 min |
| Apr 9, 8:56 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Kiowa | 64 min |
| Apr 9, 9:07 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 68 min |
| Apr 9, 9:10 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 65 min |
| Apr 9, 9:54 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton | 66 min |
| Apr 9, 9:58 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 62 min |
| Apr 9, 10:07 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan, Noble | 68 min |
| Apr 9, 10:07 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 68 min |
| Apr 9, 10:07 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey | 68 min |
| Apr 9, 10:57 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 48 min |
| Apr 9, 11:05 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Love | 55 min |
| Apr 9, 11:15 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher, Logan | 45 min |
| Apr 9, 11:57 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Love | 63 min |
| Apr 10, 12:07 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Payne | 53 min |
| Apr 10, 12:12 AM CDT | Severe Thunderstorm Warning | OUN | Carter | 48 min |
| Apr 10, 12:39 AM CDT | Severe Thunderstorm Warning | OUN | Johnston, Marshall | 66 min |
| Apr 10, 1:00 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Love | 60 min |
| Apr 10, 1:30 AM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan | 45 min |
Nearby
Tornado Warnings in Oklahoma, 1990Every tornado warning in 1990Tornadoes in 1990
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.