Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 76, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 9, 1990, 7:45 PM CDT for Garfield County, Grant County, Oklahoma. It was in force for 60 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
- Apr 9, 1990, 7:45 PM CDT (00:45 UTC)
- Expired
- Apr 9, 1990, 8:45 PM CDT
- In force
- 60 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Garfield County, OK, Grant 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, 8:15 PM CDT | Hail 0.75 | Grant, OK | |
| Apr 9, 8:24 PM CDT | Hail 1 | Garfield, OK | |
| Apr 9, 8:32 PM CDT | Hail 0.88 | Garfield, 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 00:00Z, 0.8 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
- 528 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 320 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
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 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, Apr 9, 3:40 PM CDT, 4 hours 5 minutes before
TXZALL-092145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 340 PM CDT MON APR 9 1990 ...TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF SOUTHWEST AND SOUTH CENTRAL OKLAHOMA AND A LARGE PORTION OF NORTHWEST TEXAS UNTIL 10 PM CDT THIS MONDAY EVENING... COUNTIES INCLUDED IN THIS PORTION OF NORTH CENTRAL TEXAS INCLUDE ARCHER..BAYLOR..CLAY..FOARD..HARDEMAN..JACK..KNOX..WICHITA..WILBARGER.AND YOUNG. THIS INCLUDES COTTON COUNTY OF SOUTHWESTERN OKLAHOMA. AT 330 PM CDT RADAR INDICATED AN AREA OF RAPIDLY DEVELOPING THUNDERSTORMS IN SOUTHWESTERN OKLAHOMA FROM NORTH OF CHILDRESS TEXAS NORTHEASTWARD TO OKLAHOMA CITY. MOVEMENT WAS NORTHEAST AT 30 MPH. NO THUNDERSTORMS WERE INDICATED ON RADAR IN THIS PORTION OF NORTH CENTRAL TEXAS BUT ARE EXPECTED TO FORM AND BUILD RAPIDLY THIS AFTERNOON AND EVENING. REMEMBER A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 9, 4:42 PM CDT, 3 hours 3 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, 2 hours 11 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, 1 hour 18 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, 34 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 | 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, 10:26 PM CDT | Tornado Warning | OUN | Cotton | 49 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
Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm warning 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.