Alert archive / Oklahoma / Flash Flood Warnings in 2000

Flash Flood Warning 39, NWS Norman, OK

October 26, 2000Jefferson County, Stephens County, Oklahoma

NWS Norman, OK issued this flash flood warning at Oct 26, 2000, 8:36 AM CDT for Jefferson County, Stephens County, Oklahoma. It was in force for 3 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
Oct 26, 2000, 8:36 AM CDT (13:36 UTC)
Expired
Oct 26, 2000, 11:30 AM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Jefferson County, OK, Stephens County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 1.6 hours before the alert went out and 108 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 2000-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 156 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 2000-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
156 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1007 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KOUN 261337
FFWOUN
OKC067-137-261630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
836 AM CDT THU OCT 26 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN SOUTHERN OKLAHOMA
  SOUTHERN STEPHENS COUNTY IN SOUTHERN OKLAHOMA

* UNTIL 1130 AM CDT

* AT 836 AM CDT...DOPPLER RADAR INDICATED THAT VERY HEAVY RAIN HAD
  FALLEN OVER SOUTHERN STEPHENS AND NORTHERN JEFFERSON COUNTIES
  SINCE EARLY THIS MORNING. ADDITIONAL HEAVY RAIN IS ALSO
  APPROACHING THE AREA FROM THE SOUTHWEST.

LOCATIONS IN THE WARNING INCLUDE ADDINGTON...COMANCHE...CORNISH...
CORUM...EMPIRE CITY...HASTINGS...LOCO...RINGLING...VELMA AND
WAURIKA

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.

LAT...LON 3447 9814 3420 9814 3408 9757 3448 9756
JAMES

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 26, 7:16 AM CDTFlash Flood WarningOUNJackson, Tillman3 hr
Oct 26, 5:02 PM CDTFlash Flood WarningOUNStephens3 hr
Oct 26, 5:52 PM CDTSevere Thunderstorm WarningOUNJefferson, Stephens38 min

Nearby

Flash Flood Warnings in Oklahoma, 2000Every flash flood warning in 2000

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.