Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 111, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 15, 1990, 6:32 PM CDT for Carter County, Jefferson County, Love County, Oklahoma. It was in force for 43 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 15, 1990, 6:32 PM CDT (23:32 UTC)
- Expired
- Apr 15, 1990, 7:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Carter County, OK, Jefferson County, OK, Love 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, 6:45 PM CDT | Hail 1.75 | Jefferson, 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, 11.5 hours before the alert went out and 124 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1962 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 238 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 15, 1:16 PM CDT, 5 hours 16 minutes before
OKZALL-141200- OKLAHOMA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 100 PM CDT SAT APR 14 1990 ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT OVER MUCH OF THE STATE SOUTHEAST OF A HOLLIS TO CLINTON TO VINITA LINE. A COLD FRONT IS LOCATED FROM NEAR BARTLESVILLE TO CHILDRESS TEXAS. BEHIND THE FRONT GUSTY NORTHEAST WINDS ARE BRINGING SLIGHTLY DRIER AND COOLER AIR INTO THE NORTHWEST PORTION OF THE STATE. A WINDSHIFT LINE IS MOVING SOUTHWARD THROUGH SOUTH CENTRAL AND SOUTHWEST OKLAHOMA WELL AHEAD OF THE FRONT. THIS WINDSHIFT LINE DEVELOPED AS A RESULT OF THUNDERSTORMS THAT OCCURRED MOST OF THE MORNING OVER THE NORTHEAST PORTION OF THE STATE. A DRYLINE IS LOCATED FROM JUST EAST OF CHILDRESS SOUTHWESTWARD INTO SOUTHWEST TEXAS. EAST OF THE DRYLINE VERY MOIST AIR IS FLOWING NORTHWARD INTO OKLAHOMA. TEMPERATURES ARE WARMING RAPIDLY AHEAD OF THE FRONT AND AHEAD OF THE WINDSHIFT LINE OVER THE SOUTHWEST PORTION OF THE STATE. < WITH ADDITIONAL HEATING THIS AFTERNOON THUNDERSTORMS MAY DEVELOP OVER THE SOUTHWEST PORTION OF THE STATE. IF THE THUNDERSTORMS DO DEVELOP THEY WILL LIKELY BECOME SEVERE. THE THUNDERSTORMS OCCURRING OVER NORTHEASTERN OKLAHOMA MAY INTENSIFY THIS AFTERNOON AND BECOME SEVERE AS THEY MOVE SOUTHEAST. CIVIL DEFENSE AND STORM SPOTTER GROUPS ACROSS THE AREA SHOULD REMAIN ALERT AND BE READY FOR ACTIVITATION THIS AFTERNOON AND TONIGHT.
Local storm report, Apr 15, 4:07 PM CDT, 2 hours 25 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, 1 hour 58 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, 1 hour 54 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, 40 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, 3:47 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Pontotoc | 43 min |
| Apr 15, 4:27 PM CDT | Severe Thunderstorm Warning | OUN | Coal | 48 min |
| Apr 15, 4:52 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Johnston | 38 min |
| Apr 15, 5:23 PM CDT | Flash Flood Warning | OUN | Atoka, Coal, Johnston | 2 hr |
| Apr 15, 5:34 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Johnston | 56 min |
| Apr 15, 5:42 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 48 min |
| Apr 15, 6:28 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston | 62 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.