Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 112, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 15, 1990, 7:25 PM CDT for Bryan County, Marshall County, Oklahoma. It was in force for 65 min. 2 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 15, 1990, 7:25 PM CDT (00:25 UTC)
- Expired
- Apr 15, 1990, 8:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Bryan County, OK, Marshall 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 15, 7:36 PM CDT | Hail 1.75 | Marshall, OK | |
| Apr 15, 8:00 PM CDT | Hail 1.25 | Bryan, 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, 0.4 hours before the alert went out and 159 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
- 532 J/kg
- Mixed-layer CIN
- -148 J/kg
- Mixed-layer LCL
- 907 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 5.8
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
Local storm report, Apr 15, 4:07 PM CDT, 3 hours 18 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 405 PM CDT SUN APR 15 1990 TIME(CDT) COUNTY EVENT 351 PM PONTOTOC 1 INCH HAIL AT FITTSTOWN
Special weather statement, Apr 15, 4:34 PM CDT, 2 hours 51 minutes before
TXZ019-020-1522300 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 430 PM CDT SUN APR 15 1990 ...A TORNADO WATCH IS IN EFFECT FOR HARDEMAN...FOARD...WILBARGER... KNOX...BAYLOR...WICHITA...ARCHER...CLAY...JACK...MONTAGUE AND YOUNG COUNTIES UNTIL 10 PM CDT... AT 430 PM CDT WICHITA FALLS RADAR A VERY STRONG THUNDERSTORM NORTHEAST OF ARDMORE MOVING TO THE SOUTHEAST AT 35 MPH. AT THIS TIME NO ACTIVITY WAS OCCURRING IN THIS PORTION OF NORTH CENTRAL TEXAS. A TORNADO WATCH MEANS CONDITIPNS ARE FAVORABLE FOR SEVERE STORMS AND POSSIBLE TORNADOES TO DEVELOP IN OR CLOSE TO THE WATCH AREA. KEEP ABREAST OF THE LATEST WEATHER CONDITIONS SHOULD SEVERE WEATHER DEVELOP IN THIS AREA.~
Local storm report, Apr 15, 4:38 PM CDT, 2 hours 47 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 437 PM CDT SUN APR 15 1990 TIME(CDT) COUNTY EVENT 435 PM COAL GOLFBALL-SIZED HAIL IN CLARITA
Special weather statement, Apr 15, 5:52 PM CDT, 1 hour 33 minutes before
TXZ019-020-152345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 543 PM CDT SUN APR 15 1990 ...TORNANDO WATCH IN EFFECT FOR WICHITA FALLS AND SURROUNDING COUNTIES UNTIL 10 PM... SHORTLY BEFORE 6 PM WICHITA FALLS RADAR SHOWED STRONG THUNDERSTORMS WEST OF ABILENE AND EAST OF ARDMORE OKLAHOMA. A THUNDERSTORM HAS DEVELOPED QUITE RAPIDLY OVER SOUTH CENTRAL OKLAHOMA NEAR THE RED RIVER NORTH OF NOCONA. MOVEMENT OF THUNDERS/TORM ACTIVITY SOUTHEAST. A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOS TO DEVELOP IN THIS PORTION OF NORTH CENTRAL TEXAS. STAY TUNED TO MEDIA OR NOAA WEATHER BROADCASTS FOR LATER STATEMENTS OR POSSIBLE WARNINGS.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 8:05 PM CDT | Severe Thunderstorm Warning | OUN | Love | 40 min |
| Apr 16, 6:40 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Stephens | 65 min |
| Apr 16, 6:45 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 45 min |
| Apr 16, 6:52 PM CDT | Severe Thunderstorm Warning | OUN | Marshall | 38 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.