Alert archive / Oklahoma / Flash Flood Warnings in 1997

Flash Flood Warning 49, NWS Norman, OK

July 19, 19974 counties in Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 19, 1997, 6:55 AM CDT for 4 counties in Oklahoma. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

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

The facts

Issued
Jul 19, 1997, 6:55 AM CDT (11:55 UTC)
Expired
Jul 19, 1997, 9:00 AM CDT
In force
2 hr
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Major County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 11.9 hours before the alert went out and 150 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 00:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1669 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 00:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.1939Sfc1 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
1669 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1339 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 191159
FFWOKC
OKC071-103-003-047-053-093-191400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
655 AM CDT SAT JUL 19 1997

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A FLASH FLOOD WARNING
UNTIL 9 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES

IN NORTHEASTERN OKLAHOMA
     KAY AND NOBLE

IN NORTHWESTERN OKLAHOMA
     ALFALFA...GARFIELD...GRANT AND EASTERN MAJOR

INCLUDING THE FOLLOWING LOCATIONS
     AMES...BILLINGS...BLACKWELL...BRAMAN...BRECKINRIDGE...
     BURLINGTON...CARRIER...CHEROKEE...COVINGTON...DEER CREEK...
     ENID...GARBER...GOLTRY...HELENA...HILLSDALE...JEFFERSON...
     JET...LAHOMA...LAMONT...MARLAND...MEDFORD...MENO...NASH...
     NEWKIRK...PERRY...PONCA CITY...POND CREEK...RED ROCK...
     RENFROW...RINGWOOD...TONKAWA...WAKITA AND WAUKOMIS

PERIODS OF HEAVY RAIN WILL CONTINUE THROUGH 9 AM OVER PORTIONS OF
NORTHERN OKLAHOMA AND COULD RESULT IN AN ADDITIONAL 1 TO 2 INCHES OF
RAIN. WITH THE GROUND ALREADY SATURATED IN THE WARNED AREA...AND
NUMEROUS ROADS ALREADY FLOODED AND/OR CLOSED...ADDITIONAL RAINFALL WILL
ONLY AGGRAVATE THE FLASH FLOOD PROBLEMS IN THESE AREAS. 

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.

DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS.  IT ONLY TAKES A FOOT
OR TWO OF WATER TO WASH MOST CARS AWAY.  IF YOU LIVE IN A FLOOD
PRONE AREA MOVE TO HIGHER GROUND.  DO NOT ATTEMPT TO WALK
THROUGH AREAS OF RAPIDLY FLOWING WATER.  AVOID STORM DRAINS AND
SMALL CREEKS THAT WILL QUICKLY RISE TO DANGEROUS LEVELS.


LAT...LON 3664  9703 3626  9705 3618  9807 3632  9828
          3650  9841 3695  9846 3698  9674 3657  9702

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 7:43 PM CDTFlash Flood WarningOUNGarfield, Grant, Kay, Noble3 hr
Jul 18, 10:30 PM CDTFlash Flood WarningOUNGrant, Kay2 hr
Jul 19, 12:48 AM CDTSevere Thunderstorm WarningOUNGarfield42 min
Jul 19, 1:23 AM CDTFlash Flood WarningOUNAlfalfa, Garfield, Grant3 hr
Jul 19, 1:23 AM CDTFlash Flood WarningOUNKay3 hr
Jul 19, 3:07 AM CDTFlash Flood WarningOUNNoble3 hr
Jul 19, 3:59 AM CDTFlash Flood WarningOUNAlfalfa, Garfield, Grant, Kay3 hr
Jul 19, 6:16 AM CDTFlash Flood WarningOUNBlaine3 hr
Jul 19, 6:55 AM CDTFlash Flood WarningOUNKay, Noble2 hr
Jul 19, 9:10 AM CDTFlash Flood WarningOUNGarfield, Grant, Kay, Noble3 hr
Jul 19, 9:55 AM CDTFlash Flood WarningOUNLincoln3 hr
Jul 19, 10:49 AM CDTFlash Flood WarningOUNOklahoma3 hr

Nearby

Flash Flood Warnings in Oklahoma, 1997Every flash flood warning in 1997

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.