Alert archive / Oklahoma / Flash Flood Warnings in 1990

Flash Flood Warning 96, NWS Shreveport, LA

October 7, 1990McCurtain County, Oklahoma

NWS Shreveport, LA issued this flash flood warning at Oct 7, 1990, 11:57 PM CDT for McCurtain County, Oklahoma. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Oct 7, 1990, 11:57 PM CDT (04:57 UTC)
Expired: Oct 8, 1990, 4:00 AM CDT
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Whole counties

County McCurtain 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

Longview/Gregg, TX (KGGG), launched 00:00Z, 5.0 hours before the alert went out and 197 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1403 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 080459
FFWSHV
OKC089-080900-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1157 PM CDT SUN OCT 7 1990
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  400 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS..
 
IN SOUTHEAST OKLAHOMA
 
   ...MCCURTAIN COUNTY
 
AT 1150 PM NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED
SHOWERS AND STRONG THUNDERSTORMS OVER SOUTHEAST OKLAHOMA AND NORTH-
EAST TEXAS FROM EAGLETOWN OKLAHOMA TO PARIS TEXAS. THE HEAVIEST
RAIN WAS OCCURRING NEAR WRIGHT CITY OKLAHOMA AND JUST SOUTHWEST OF
PARIS TEXAS. MOVEMENT WAS NORTHEAST AT 15 MPH.
 
RAINFALL AMOUNTS OF 2 TO 4 INCHES IN A SHORT PERIOD OF TIME IS
POSSIBLE. EARLIER SULPHUR SPRINGS TEXAS RECEIVED OVER 2 INHCES OF
RAIN IN LESS THAN AN HOURS TIME.
 
A FLOOD WARNING ALSO REMAINS IN EFFECT FOR THE LITTLE RIVER AND ITS
TRIBUTARIES IN SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS FOR TONIGHT.
 
 
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.  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

Local storm report, Oct 7, 8:56 PM CDT, 3 hours 1 minute before

STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
845 PM CDT SUN OCT 7 1990

STORM REPORTS FOR  SUN OCT 7 1990

TIME LST    CNTY/PRSH  ST     EVENT/LOCATION/DAMAGE

 540 PM    LITTLE RIVER AR .. HEAVY RAIN...HIGH WINDS...GOLFBALL SIZE
                              HAIL...DOWNED TREES 5 MILES WEST OF FOREMAN.

 604 PM    HOWARD       AR .. 4.54 INCHES OF RAIN 6S NEWHOPE BETWEEN
                              2-6 PM CAUSING FLOODING.

 609 PM    SEVIER       AR .. 4.95 INCHES OF RAIN AT HORATIO.

 630 PM    LITTLE RIVER AR .. 60 MPH WINDS AT INDEX ARKANSAS DOWNING
                              SEVERAL TREES.
.
 630 PM    HOWARD       AR .. 4 TO 6 INCHES OF RAINFALL IN FOUR HOURS
                              AT DIERKS.

Special weather statement, Oct 7, 11:01 PM CDT, 56 minutes before

OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-080600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1055 PM CDT SUN OCT 7 1990

...FLASH FLOOD WATCH IN EFFECT FOR TONIGHT AND MONDAY FOR SOUTHWEST
ARKANSAS AND SOUTHEAST OKLAHOMA...

AT 1050 PM CDT WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS
AND THUNDERSTORMS OVER SOUTHWEST ARKANSAS...NORTHEAST LOUISIANA...NORTHEAST
TEXAS...AND SOUTHEAST OKLAHOMA. HEAVY RAINFALL WAS OCCURRING NEAR BASTROP
AND LAKE PROVIDENCE LOUISIANA. IN SOUTHEAST OKLAHOMA HEAVY RAIN WAS OCCURR-
ING NEAR WRIGHT CITY OKLAHOMA. IN NORTHEAST TEXAS HEAVY RAIN WAS INDICATED
NEAR PARIS AND SULPHUR SPRINGS. MOVEMENT OF THE STORMS WAS TO THE NORTHEAST AT
15 MPH.

THE STRONGER STORMS WILL PRODUCE HEAVY RAINFALL...STRONG GUSTY WINDS AND
DANGEROUS LIGHTNING. MOTORISTS ARE URGED TO USE CAUTION SINCE LOW AREA
FLOODING MAY OCCUR OVER SOUTHEAST OKLAHOMA...NORTHEAST TEXAS...AND SOUTH-
WEST ARKANSAS DUE TO HEAVY RAINFALL EARLIER THIS EVENING.

...A FLOOD WARNING IN EFFECT FOR THE TRIBUTARIES OF THE LITTLE RIVER
IN SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS DUE TO AS MUCH AS SIX
INCHES OF RAINFALL OVER THE BASIN...

PERSONS IN SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS SHOULD BE ALERT
TO ADDITIONAL HEAVY RAINS TONIGHT AND MONDAY..THE SOILS HAVE BEEN
SATURATED WITH SMALL STREAMS AND RIVERS AT HIGH LEVELS DUE TO EXCESS
WATER RUNOFF.  ADDITIONAL HEAVY RA[INS TONIGHT AND MONDAY WILL
CONTRIBUTE TO RAPID RUNOFF AND RAPID FLOODING.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 8, 4:20 AM CDT	Flash Flood Warning	SHV	McCurtain	5 hr
Oct 8, 9:15 AM CDT	Flash Flood Warning	SHV	McCurtain	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 1990 Every 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.