Alert archive / Louisiana / Flash Flood Warnings in 1990

Flash Flood Warning 50, NWS Shreveport, LA

May 30, 1990Caddo Parish, De Soto Parish, Louisiana; Panola County, Texas

NWS Shreveport, LA issued this flash flood warning at May 30, 1990, 8:07 PM CDT for Caddo Parish, De Soto Parish, Louisiana; Panola County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 30, 1990, 8:07 PM CDT (01:07 UTC)
Expired
May 30, 1990, 10:15 PM CDT
In force
2 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Caddo Parish, LA, De Soto Parish, LA, Panola County, TX

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, 1.1 hours before the alert went out and 59 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, Longview/Gregg, TX at 00:00Z on 1990-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3079 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, Longview/Gregg, TX at 00:00Z on 1990-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 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
3079 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
745 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
326 m²/s²
Significant tornado parameter
4.9
Supercell composite
24.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Special weather statement, May 30, 4:44 PM CDT, 3 hours 23 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-310000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
445 PM CDT WED MAY 30 1990

...TORNADO WATCH IN EFFECT UNTIL 10 PM FOR SOUTHEAST OKLAHOMA AND
EXTREME NORTHEAST TEXAS...

...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE OVER SOUTH ARKANSAS AND
ARE DEVELOPING OVER SOUTHEAST OKLAHOMA AND EAST TEXAS...

AT 440 PM WEATHER SERVICE RADAR SHOWED SCATTERED SHOWERS AND A FEW
THUNDERSTORMS OVER SOUTH ARKANSAS NORTH OF A LINE FROM TEXARKANA TO
EL DORADO. ALSO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE
DEVELOPING OVER SOUTHEAST OKLAHOMA AND EAST TEXAS. MOVEMENT WAS
TO THE NORTHEAST AT 35 MPH.

SOME OF THESE STORMS MAY BECOME SEVERE THIS EVENING AND TONIGHT OVER
THE NORTHWEST PART OF THE ARKALTEX AND PRODUCE HEAVY RAIN..HAIL..
STRONG GUSTY WINDS AND POSSIBLY TORNADOES.

PERSONS SHOULD STAY TUNED TO RADIO..TELEVISION OR NOAA WEATHER
RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 8:07 PM CDTFlash Flood WarningSHVBossier, Webster2 hr
May 30, 8:07 PM CDTTornado WarningSHVCaddo96 min
May 30, 8:07 PM CDTTornado WarningSHVBossier, Webster96 min
May 30, 8:07 PM CDTTornado WarningSHVDe Soto96 min
May 30, 9:43 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, De Soto, Red River3 hr
May 30, 9:56 PM CDTFlash Flood WarningSHVCaddo4 hr
May 30, 9:56 PM CDTFlash Flood WarningSHVDe Soto4 hr
May 30, 9:56 PM CDTFlash Flood WarningSHVBossier, Red River4 hr
May 30, 10:40 PM CDTSevere Thunderstorm WarningSHVNatchitoches, Winn95 min
May 31, 10:25 AM CDTSevere Thunderstorm WarningSHVUnion95 min
May 31, 11:15 AM CDTFlash Flood WarningSHVCaddo, De Soto4 hr
May 31, 11:15 AM CDTFlash Flood WarningSHVBienville, Jackson, Lincoln, Ouachita, Winn4 hr
May 31, 11:15 AM CDTFlash Flood WarningSHVNatchitoches, Sabine4 hr
May 31, 11:15 AM CDTFlash Flood WarningSHVBossier, Claiborne, Webster4 hr
May 31, 11:15 AM CDTFlash Flood WarningSHVUnion4 hr
May 31, 11:15 AM CDTFlash Flood WarningSHVRed River4 hr
May 31, 1:45 PM CDTFlash Flood WarningSHVCaldwell, Franklin3 hr
May 31, 1:45 PM CDTFlash Flood WarningSHVMadison, Tensas3 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVCaddo, De Soto4 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVBienville, Caldwell, Jackson, Lincoln, Ouachita, Winn4 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVFranklin, Madison, Richland4 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVNatchitoches, Red River, Sabine4 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVBossier, Webster4 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVTensas4 hr
May 30, 7:09 PM CDTTornado WarningSHVPanola, Rusk66 min
May 30, 8:07 PM CDTFlash Flood WarningSHVHarrison, Marion, Rusk2 hr
May 30, 9:56 PM CDTFlash Flood WarningSHVGregg, Harrison, Rusk4 hr
May 31, 1:11 AM CDTSevere Thunderstorm WarningSHVPanola64 min
May 31, 1:45 PM CDTFlash Flood WarningSHVGregg, Harrison3 hr
May 31, 3:00 PM CDTFlash Flood WarningSHVGregg4 hr

Nearby

Flash Flood Warnings in Louisiana, 1990Flash Flood Warnings in Texas, 1990Every 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.