Alert archive / Oklahoma / Flash Flood Warnings in 1993

Flash Flood Warning 21, NWS Norman, OK

May 8, 1993Grady County, Oklahoma

NWS Norman, OK issued this flash flood warning at May 8, 1993, 6:24 PM CDT for Grady County, Oklahoma. It was in force for 2 hr.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
May 8, 1993, 6:24 PM CDT (23:24 UTC)
Expired
May 8, 1993, 8:30 PM CDT
In force
2 hr
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Grady County, OK

The radar

The Norman radar (KTLX), 61 km from the middle of the area, began a volume at 23:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 46 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 1993-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1606 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 1993-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 square meters per square second.19395878Sfc1 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
1606 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 082326
FFWOKC
OKC051-090130-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
624 PM CDT SAT MAY 08 1993

THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN CENTRAL OKLAHOMA
     GRADY

INCLUDING THE FOLLOWING LOCATIONS
    NINNEKAH...ALEX...BRADLEY...AND RUSH SPRINGS. 

AT 624 PM CDT RADAR INDICATED VERY HEAVY RAIN CONTINUING OVER THE
SOUTHERN AND EASTERN SECTIONS OF GRADY COUNTY. ADDITIONAL RAINFALL
AMOUNTS OF NEAR 2 INCHES ARE POSSIBLE THRU 8 30 PM.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR
OCCURING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND
IMMEDIATELY.  RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD
TAKE IMMEDIATE PRECAUTIONS.  DO NOT ATTEMPT TO CROSS SWIFTLY
FLOWING WATERS BY FOOT OR BY AUTO.  DO NOT ATTEMPT TO DRIVE
OVER A ROAD COVERED BY WATER.  THE ROAD COULD BE WASHED OUT
UNDER THE WATER SURFACE. PERSONS WITH LIVESTOCK OR PROPERTY IN
LOW LYING AREAS SHOULD TAKE IMMEDIATE ACTION TO PROTECT THEM
FROM HIGH WATER.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.  REMEMBER...MOST
DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  IT ONLY TAKES A
FOOT OR TWO OF FLOWING WATER TO WASH MOST CARS AWAY.


LAT...LON 3502  9770 3477  9794 3508  9813 3527  9801
          3524  9774

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 7:02 PM CDTTornado WarningOUNGreer, Harmon43 min
May 7, 7:05 PM CDTSevere Thunderstorm WarningOUNWoodward40 min
May 7, 7:24 PM CDTTornado WarningOUNBeckham51 min
May 7, 7:37 PM CDTSevere Thunderstorm WarningOUNWoods38 min
May 7, 7:54 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Washita51 min
May 7, 8:13 PM CDTTornado WarningOUNBeckham32 min
May 7, 8:19 PM CDTSevere Thunderstorm WarningOUNHarmon41 min
May 7, 8:23 PM CDTFlash Flood WarningOUNEllis3 hr
May 7, 8:38 PM CDTSevere Thunderstorm WarningOUNCaddo52 min
May 7, 8:39 PM CDTTornado WarningOUNBlaine, Dewey36 min
May 7, 9:39 PM CDTSevere Thunderstorm WarningOUNKiowa, Washita51 min
May 7, 9:43 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian47 min
May 7, 9:49 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche41 min
May 7, 9:58 PM CDTSevere Thunderstorm WarningOUNGarfield, Kay, Noble47 min
May 7, 10:28 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Grady47 min
May 7, 10:42 PM CDTSevere Thunderstorm WarningOUNKingfisher33 min
May 7, 10:50 PM CDTSevere Thunderstorm WarningOUNCleveland, Logan, Oklahoma40 min
May 7, 10:50 PM CDTSevere Thunderstorm WarningOUNMcClain40 min
May 7, 11:15 PM CDTFlash Flood WarningOUNKay3 hr
May 7, 11:21 PM CDTSevere Thunderstorm WarningOUNLincoln, Payne54 min
May 7, 11:30 PM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma45 min
May 8, 12:46 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods44 min
May 8, 1:08 AM CDTSevere Thunderstorm WarningOUNGarfield, Grant52 min
May 8, 3:16 AM CDTSevere Thunderstorm WarningOUNRoger Mills44 min
May 8, 5:06 AM CDTSevere Thunderstorm WarningOUNCleveland, Oklahoma39 min
May 8, 5:22 AM CDTSevere Thunderstorm WarningOUNLincoln, Pottawatomie53 min
May 8, 7:01 AM CDTSevere Thunderstorm WarningOUNGreer, Jackson44 min
May 8, 9:15 AM CDTFlash Flood WarningOUNBeckham, Greer, Kiowa4 hr
May 8, 9:15 AM CDTFlash Flood WarningOUNCaddo, Washita4 hr
May 8, 12:55 PM CDTFlash Flood WarningOUNCaddo, Kiowa, Washita4 hr
May 8, 1:15 PM CDTFlash Flood WarningOUNBlaine, Canadian, Kingfisher3 hr
May 8, 1:58 PM CDTTornado WarningOUNGrady32 min
May 8, 2:27 PM CDTSevere Thunderstorm WarningOUNGrady48 min
May 8, 2:37 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa53 min
May 8, 2:50 PM CDTFlash Flood WarningOUNCleveland, Grady, McClain3 hr
May 8, 2:50 PM CDTFlash Flood WarningOUNOklahoma3 hr
May 8, 2:50 PM CDTSevere Thunderstorm WarningOUNLincoln40 min
May 8, 3:15 PM CDTFlash Flood WarningOUNLogan, Payne3 hr
May 8, 3:28 PM CDTSevere Thunderstorm WarningOUNKiowa62 min
May 8, 3:34 PM CDTSevere Thunderstorm WarningOUNJackson56 min
May 8, 3:51 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain54 min
May 8, 3:51 PM CDTSevere Thunderstorm WarningOUNOklahoma54 min
May 8, 3:57 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman48 min
May 8, 4:43 PM CDTSevere Thunderstorm WarningOUNCleveland, Grady, McClain62 min
May 8, 4:43 PM CDTSevere Thunderstorm WarningOUNOklahoma62 min
May 8, 4:45 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton45 min
May 8, 5:01 PM CDTSevere Thunderstorm WarningOUNStephens59 min
May 8, 5:05 PM CDTTornado WarningOUNCotton25 min
May 8, 5:08 PM CDTTornado WarningOUNJefferson67 min
May 8, 5:13 PM CDTTornado WarningOUNStephens62 min
May 8, 5:15 PM CDTFlash Flood WarningOUNKingfisher3 hr
May 8, 5:51 PM CDTTornado WarningOUNGrady39 min
May 8, 5:55 PM CDTFlash Flood WarningOUNCleveland, McClain, Oklahoma3 hr
May 8, 6:06 PM CDTTornado WarningOUNJefferson39 min
May 8, 6:14 PM CDTFlash Flood WarningOUNLincoln, Payne2 hr
May 8, 6:16 PM CDTSevere Thunderstorm WarningOUNLincoln44 min
May 8, 6:35 PM CDTSevere Thunderstorm WarningOUNGarvin, McClain40 min
May 8, 6:42 PM CDTTornado WarningOUNJefferson63 min
May 8, 6:48 PM CDTSevere Thunderstorm WarningOUNCarter42 min
May 8, 6:53 PM CDTTornado WarningOUNCarter37 min

Nearby

Flash Flood Warnings in Oklahoma, 1993Every flash flood warning in 1993

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; radar from the NEXRAD Level II archive.