Alert archive / Oklahoma / Flash Flood Warnings in 1990

Flash Flood Warning 15, NWS Norman, OK

April 25, 1990Bryan County, Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 25, 1990, 6:28 PM CDT for Bryan County, Oklahoma. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 25, 1990, 6:28 PM CDT (23:28 UTC)
Expired
Apr 25, 1990, 9:30 PM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Whole counties

County Bryan 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, 11.5 hours before the alert went out and 175 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.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 12:00Z on 1990-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 250 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 1990-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
250 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KOKC 252332
FFWOKC
OKC013-260230-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
628 PM CDT WED APR 25 1990
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  930 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN SOUTHEAST OKLAHOMA
 
   ...BRYAN COUNTY
 
AT 628 PM CDT THE BRYAN COUNTY CIVIL DEFENSE DIRECTOR REPORTED STREET
FLOODING IN AND AROUND DURANT. WEATHER SERVICE RADAR INDICATED THAT
HEAVY RAINFALL HAD BEEN OCCURING OVER BRYAN COUNTY FOR THE PAST FEW
HOURS. ADDITIONAL THUNDERSTORMS WITH HEAVY RAINFALL WILL BE MOVING
OVER THE COUNTY IN THE NEXT HOUR.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  THE WATER MAY ALSO CONCEAL SPOTS WHERE THE ROAD IS
WASHED AWAY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE 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 25, 2:17 PM CDT, 4 hours 11 minutes before
TXZ020-019-252015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
217 PM CDT WED APR 25 1990

...TORNADO WATCH FOR THE EXTREME SOUTHEASTERN PORTION OF MONTAGUE
COUNTY AND EXTREME SOUTHEASTERN PORTION OF JACK COUNTY OF NORTH
CENTRAL TEXAS UNTIL 9 PM CDT THIS WEDNESDAY EVENING...

AT 2PM CDT AREA RADARS INDICATED NUMEROUS THUNDERSTORMS AND
RAINSHOWERS...MANY VERY STRONG..WERE ACROSS NORTH CENTRAL TEXAS
EXTENDING INTO THE HILL COUNTRY. THE STRONGEST THUNDERSTORMS WERE IN A
20 MILE WIDE BAND FROM NEAR BOWIE SOUTH TO MINERAL WELLS AND ON
SOUTHWARD TO COMANCHE. MOVEMENT WAS EAST AT 25 MPH.

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 25, 3:00 PM CDT, 3 hours 28 minutes before
TXZ020-019-252130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
300 PM CDT WED APR 25 1990

...TORNADO WATCH FOR THE EXTREME SOUTHEASTERN PORTION OF MONTAGUE
COUNTY AND EXTREME SOUTHEASTERN PORTION OF JACK COUNTY OF NORTH
CENTRAL TEXAS UNTIL 9 PM CDT THIS WEDNESDAY EVENING...

...FLASH FLOOD WATCH FOR THE REMAINDER OF TODAY AND TONIGHT FOR THE
EXTREME SOUTHEAST PORTIONS OF JACK AND MONTAGUE COUNTIES...

AT 245 PM CDT AREA RADARS INDICATED NUMEROUS THUNDERSTORMS WITH VERY
HEAVY RAINSHOWERS IN A NARROW BAND FROM DECATUR IN WISE COUNTY TO
STEPHENVILLE IN ERATH COUNTY. MOVEMENT WAS EAST AT 25 MPH.

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 25, 4:02 PM CDT, 2 hours 26 minutes before
TXZ020-019-252200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
400 PM CDT WED APR 25 1990

THE TORNADO WATCH AND FLASH FLOOD WATCH FOR JACK AND MONTAGUE
COUNTIES HAS BEEN CANCELLED...

AT 400 PM CDT...THE LINE OF POTENTUALLY SEVERE THUNDERSTORMS PRODUCING
LOCALLY VERY HEAVY RAINFALL HAD MOVED EAST OF JACK AND MONTAGUE
COUNTIES. MOVEMENT WAS EAST AT 25 MPH.

THE STRONGEST THUNDERSTORMS WERE OCCURRING FROM NEAR GAINSVILLE TO
DECAUTER TO WEATHERFORD TEXAS. NO SEVERE WEATHER WAS REPORTED TO
THIS OFFICE WITH THE PASSAGE OF THIS SQUALL LINE.

HOWEVER...LOCALLY VERY HEAVY RAINFALL WAS OBSERVED AT BOWIE. NINE
TENTHS OF AN INCH OF RAIN WAS MEASURED BUT NO FLOODING PROBLEMS@
RESULTED.

SHOWERS AND THUNDERSTORMS WERE FORECAST TO REDEVELOP LATTER TONIGHT
ONCE AGAIN ACROSS THIS SECTION OF NORTH CENTRAL TEXAS.
Special weather statement, Apr 25, 5:20 PM CDT, 1 hour 8 minutes before
TXZ020-019-252200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
515 PM CDT WED APR 25 1990

...THUNDERSTORM FORM SOUTH OF WICHITA FALLS...

THE WIICHITA FALLS RADAR SHOWED AN AREA OF THUNDERSTORMS AND RAINSHOWERS
OCCURRING OVER PORTIONS OF YOUNG...ARCHER AND CLAY COUNTIES. MOVEMENT
WAS NORTHEAST AT 25 MPH.

THE STRONGEST THUNDERSTORMS WERE OCCURRING MOSTLY OVER YOUNG COUNTY.
NO SEVERE WEATHER WAS INDICATED BUT LATE AFTERNOON COMMUTERS WILL
LIKELY EXPERIENCE BRIEF BUT VERY HEAVY RAINFALL...FREQUENT LIGHTNING...
AND SMALL HAIL NEAR THE HEAVIEST THUNDERSTORMS.

IF PRESENT TRENDS CONTINUE...THIS THUNDERSTORM CLUSTER WILL BE IN THE
WICHITA FALLS VICINITY BY 6PM CDT.

ELSEWHERE...A LINE OF THUNDERSTORMS PRODUCING SEVERE WEATHER CONDITIONS
WAS OCCURRING GENERALLY ALONG AND EAST OF A GAINSVILLE...DECAUTER...
MINERAL WELLS LINE. MOVEMENT WAS NORTHEAST.
Special weather statement, Apr 25, 5:47 PM CDT, 41 minutes before
TXZ020-019-252200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
550 PM CDT WED APR 25 1990

...THUNDERSTORM INTENSIFY SOUTH OF WICHITA FALLS...

THE WICHITA FALLS RADAR SHOWED AN AREA OF INTENSIFING THUNDERSTORMS
OCCURRING OVER SOUTHERN ARCHER...CLAY AND ACROSS MUCH OF YOUNG COUNTY.
MOVEMENT WAS NORTHEAST AT 30 MPH.

THE STRONGEST THUNDERSTORMS WERE NEAR WINDTHORST...NORTH AND EAST OF
OLNEY AND APPROACHING YOUNG COUNTY FROM THE SOUTH.

PRESONS IN AND NEAR THIS ACTIVITY WILL LIKELY EXPERIENCE HAIL UP TO
MARBLE SIZE...VERY HEAVY RAINFALL...GUSTY WIND TO 50 MPH AND OF
COURSE FREQUENT LIGHTNING.

IF PRESENT TRENDS CONTINUE...THIS THUNDERSTORM CLUSTER WILL BE IN THE
WICHITA FALLS VICINITY BETWEEN 6 AND 7 PM CDT.

EARLIER...PEA SIZE HAIL COVERED THE GROUND IN NORTHEAST YOUNG COUNTY
NEAR THE COMMUNITY OF MARKLEY.
Special weather statement, Apr 25, 6:26 PM CDT, 2 minutes before
TXZ020-019-260130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
626 PM CDT WED APR 25 1990

THUNDERSTORM WITH HEAVY RAIN AND SOME PEA TO OCCASIONAL MARBLE SIZE
HAIL MOVING THROUGH THE CITY.

AT 625 PM RADAR SHOWED A THUNDERSTORM IN THE SOUTHERN SECTIONS OF THE
CITY MOVING NORTH NORTHEAST AT 30 MPH. SEVERAL REPORTS OF HEAQVY RAIN
AND SMALL HAIL HAVE BEEN REPORTED WITH THIS STORM. SOME ADDITIONAL
STREET FLOODING MAY OCCUR AS THIS THUNDERSTORM COMPLEX MOVES ACROSS
THE CITY.

OTHER STORMS EXTENDED FROM NEAR GRAHAM TO HENRIETTA AND IN SOUTHERN
JACK COUNTY. HENRIETTA REPORTED PEA SIZE HAIL AT 605 PM. MORE INTENSE
STORMS WERE NORTH OF THE DALLAS FORT WORTH METROPLEX. MOVEMENT WAS
NORTH NORTHEAST AT 30 MPH.

A TORNADO WATCH IS IN EFFECT FOR PARTS OF NORTH CENTRAL TEXAS EAST OF
THE LOCAL AREA.

SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO STRIKE WITH LITTLE
ADVANCE NOTICE. BE PREPARED TO TAKE PRECAUTIONS IF S9EVERE WEATHER IS
REPORTED.

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 9:31 PM CDTSevere Thunderstorm WarningOUNEllis59 min
Apr 24, 9:58 PM CDTTornado WarningOUNEllis32 min
Apr 24, 10:29 PM CDTTornado WarningOUNEllis31 min
Apr 24, 10:58 PM CDTTornado WarningOUNEllis32 min
Apr 24, 11:27 PM CDTTornado WarningOUNEllis, Harper33 min
Apr 24, 11:33 PM CDTSevere Thunderstorm WarningOUNWoodward42 min
Apr 24, 11:58 PM CDTTornado WarningOUNHarper32 min
Apr 25, 12:09 AM CDTSevere Thunderstorm WarningOUNEllis51 min
Apr 25, 12:14 AM CDTSevere Thunderstorm WarningOUNWoodward46 min
Apr 25, 12:21 AM CDTTornado WarningOUNEllis24 min
Apr 25, 12:27 AM CDTSevere Thunderstorm WarningOUNWoods63 min
Apr 25, 12:39 AM CDTSevere Thunderstorm WarningOUNHarper36 min
Apr 25, 1:36 AM CDTSevere Thunderstorm WarningOUNEllis54 min
Apr 25, 12:33 PM CDTSevere Thunderstorm WarningOUNGarvin, McClain42 min
Apr 25, 12:47 PM CDTSevere Thunderstorm WarningOUNCarter43 min
Apr 25, 6:44 PM CDTSevere Thunderstorm WarningOUNCotton46 min
Apr 25, 6:51 PM CDTSevere Thunderstorm WarningOUNMarshall39 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.