Flash Flood Warning 52, NWS Norman, OK

Issued

Sep 21, 1990, 12:19 AM CDT (05:19 UTC)

Expired

Sep 21, 1990, 3:15 AM CDT

In force

3 hr

Issued by

NWS Norman, OK

Area

Whole counties

County Grady County, OK

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

000 
TTAA00 KOKC 210521
FFWOKC
OKC017-027-051-081-109-210815-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1219 AM CDT FRI SEP 21 1990
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  315 AM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN CENTRAL OKLAHOMA
 
   ...SOUTHEASTERN CANADIAN COUNTY...NORTHWESTERN CLEVELAND COUNTY
   ...NORTHERN GRADY COUNTY...LINCOLN COUNTY...OKLAHOMA COUNTY
 
AT 1219 AM CDT RADAR INDICATED A LINE OF THUNDERSTORMS WITH VERY HEAVY
RAINFALL FROM 4 MILES SOUTH OF MINCO TO 5 MILES SOUTH OF WELLSTON. THE
THUNDERSTORMS ARE MOVING TOWARD THE NORTHEAST AT 20 MILES PER HOUR.
MORE THAN 2 INCHES OF RAIN HAS FALLEN OVER PARTS OF THE FLASH FLOOD
WARNING AREA IN THE PAST TWO HOURS...AND ADDITIONAL THUNDERSTORMS WITH
HEAVY RAINFALL ARE DEVELOPING OVER NORTHERN GRADY COUNTY AND WILL MOVE
OVER MUCH THE SAME AREA WHICH RECEIVED THE HEAVY RAINFALL PREVIOUSLY.
 
FLOODING OF SMALL STREAMS AND STREETS ALREADY IS IN PROGRESS IN THE
OKLAHOMA CITY METROPOLITAN AREA...AND ADDITIONAL RAINFALL WILL FURTHER
ADD TO THE DRAINAGE PROBLEMS. MOTORISTS SHOULD EXERCISE EXTREME
CAUTION IF TRAVELLING THROUGH THE OKLAHOMA CITY METROPOLITAN AREA
TONIGHT. SECONDARY ROADWAYS AND FLASH FLOOD PRONE AREAS SHOULD BE
AVOIDED. REMEMBER THAT WATER ONLY 18 INCHES DEEP CAN FLOAT VEHICLES
FROM ROADWAYS INTO DEEPER WATER WHICH MAY BE LIFE THREATENING.
 
STAY TUNED TO NOAA WEATHER RADIO FOR LATER UPDATES AND WARNINGS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOuT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

In the hours before

OKZ0-011-015-016-210500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1130 PM CDT THU SEP 20 1990

...THUNDERSTORMS WITH VERY HEAVY RAIN AND GUSTY WINDS ARE MOVING
THROUGH CENTRAL OKLAHOMA...

AT 1130 PM AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN AND GUSTY WINDS
EXTENDED FROM EASTERN CANADIAN AND NORTHEASTERN GRADY COUNTIES ACROSS
MOST OF OKLAHOMA COUNTY AND NORTHERN PORTIONS OF CLEVELAND AND MCCLAIN
COUNTIES. HEAVY RAINS HAVE BEEN REPORTED DURING THE PAST HOUR AT YUKON
MOORE MUSTANG AND THE OKLAHOMA CITY AREA ALONG WITH STREET FLOODING.

THE THUNDERSTORMS WILL CONTINUE TO MOVE NORTHEASTWARD AT 20 MPH AND WILL
SPREAD INTO LINCOLN AND NORTHERN POTTAWATOMIE COUNTIES! DURING THE NEXT
HOUR. MOTORISTS SHOULD BE VERY CAUTIOUS AND BE ALERT FOR POOR VISIBILITIES
AND FLOODED STREETS WHILE DRIVING THROUGH THIS AREA DURING THE NEXT 1 TO
2 HOURS. BRIEF STRONG AND GUSTY WINDS MAY ALSO ACCOMPANY THESE STORMS.

Flash Flood Warnings in Oklahoma, 1990Every flash flood warning in 1990

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.