Alert archive / Oklahoma / Flash Flood Warnings in 1990
Flash Flood Warning 5, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Apr 15, 1990, 5:23 PM CDT for Atoka County, Coal County, Johnston County, Oklahoma. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Apr 15, 1990, 5:23 PM CDT (22:23 UTC)
- Expired
- Apr 15, 1990, 7:30 PM CDT
- In force
- 2 hr
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Atoka County, OK, Coal County, OK, Johnston County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 10.4 hours before the alert went out and 131 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
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 152223 FFWOKC OKC005-029-069-160030- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 523 PM CDT SUN APR 15 1990 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 730 PM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN SOUTHEAST OKLAHOMA ...WESTERN ATOKA COUNTY...SOUTHWESTERN COAL COUNTY ...NORTHEASTERN JOHNSTON COUNTY VERY HEAVY THUNDERSTORMS CONTINUE IN THE CLARITA BROMIDE AND WAPANUCKA AREAS WITH RADAR NOW ESTIMATING UP TO 4 INCHES OF RAIN DURING THE PAST 1 TO 2 HOURS. EXPECT FLASH FLOODING ALONG DELAWARE AND GOOSE CREEKS AND EVENTUALLY ALONG PARTS OF CLEAR BOGGY CREEK IN SOUTHWESTERN COAL AND WESTERN ATOKA COUNTIES. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NNEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
What forecasters said that day
The local office's own words before this flash flood 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, 4 hours 7 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, 1 hour 16 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, 49 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, 45 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
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, 5:34 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 |
| Apr 15, 6:32 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Love | 43 min |
Nearby
Flash Flood Warnings in Oklahoma, 1990Every flash flood 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; the sounding from the Mesonet's radiosonde archive.