Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 13, NWS Shreveport, LA

February 19, 1991De Soto Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Feb 19, 1991, 2:30 AM CST for De Soto Parish, Louisiana. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Feb 19, 1991, 2:30 AM CST (08:30 UTC)
Expired
Feb 19, 1991, 3:30 AM CST
In force
60 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County De Soto Parish, LA

What was reported inside it

TimeReportWhereRemark
Feb 19, 3:20 AM CSTThunderstorm Wind 0De Soto, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 8.5 hours before the alert went out and 88 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 1991-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 766 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 1991-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.1939587897117136156Sfc1 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
766 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

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 severe thunderstorm 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, Feb 18, 10:52 PM CST, 3 hours 38 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-
002-003-004-005-006-190700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1045 PM CST MON FEB 18 1991

...TORNADO WATCH IN EFFECT FOR ALL OF NORTH LOUISIANA...MUCH OF EAST
TEXAS AND PARTS OF SOUTH ARKANSAS...UNTIL 4 AM CST TUESDAY...
...SEVERE THUNDERSTORMS WARNINGS ARE NO LONGER IN EFFECT FOR CLAIBORNE AND
BIENVILLE PARISHES IN NORTH LOUISIANA AND BOWIE COUNTY TEXAS...

...HOWEVER A LINE OF THUNDERSTORMS WAS DEVELOPING FROM SOUTHWEST ARKANSAS
NEAR GLENWOOD TO NEAR TYLER TEXAS AND ON TO JUST EAST OF WACO AND TO
NEAR COLLEGE STATION. SEVERE THUNDERSTORMS ARE LOCATED NEAR 30 MILES
SOUTHWEST OF TYLER TEXAS. ADDITIONAL SEVERE STORMS WILL DEVELOP PRIOR TO MID-
NIGHT AND SPREAD ACROSS NORTHEAST TEXAS AND NORTH LOUISIANA AND SOUTHWEST
ARKANSAS DURING THE MIDNIGHT HOURS.

RAIN AND SHOWERS WITH ISOLATED THUNDERSTORMS CONTINUE OVER SOUTHEAST ARKANSAS
AND NORTH CENTRAL LOUISIANA BUT CONTINUE TO DECREASE IN COVERAGE AND IN
STRENGTH.

BESIDES THE THREAT OF SEVERE STORMS SPREADING FROM WEST TO EAST TONIGHT
...ADDITIONAL HEAVY RAINFALL IS LIKELY TONIGHT WITH A FLASH FLOOD WATCH
IN EFFECT FOR MUCH OF THE ARKLATEX EXPECIALLY THE SOUTHEAST HALF.
GENERAL RAINFALL OF ONE TO TWO INCHES HAS OCCURRED ALREADY WITH ISOLATED
AMOUNTS OF NEAR THREE INCHES WHICH RESULTED IN SOME LOW AREA FLOODING.
MANY SMALL STREAMS ARE RUNNING NEAR BANKFULL AS A RESULT OF THISs HEAVY
RAINFALL. ADDITIONAL RAINFALL TONIGHT MAY CAUSE FLOODING IN LOW AREAS
AND SMALL STREAMS THAT MAY EFFECT SOME ROADWAYS.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 9:08 PM CSTSevere Thunderstorm WarningSHVBienville, Claiborne82 min
Feb 19, 1:33 AM CSTSevere Thunderstorm WarningSHVBossier, Caddo87 min
Feb 19, 1:45 AM CSTFlash Flood WarningSHVBienville, Lincoln, Union4 hr
Feb 19, 1:45 AM CSTFlash Flood WarningSHVDe Soto, Red River4 hr
Feb 19, 3:06 AM CSTSevere Thunderstorm WarningSHVSabine69 min
Feb 19, 3:32 AM CSTSevere Thunderstorm WarningSHVDe Soto, Natchitoches, Red River88 min
Feb 19, 4:09 AM CSTSevere Thunderstorm WarningSHVWinn81 min
Feb 19, 5:25 AM CSTSevere Thunderstorm WarningSHVCaldwell, Franklin, Richland65 min
Feb 19, 5:25 AM CSTSevere Thunderstorm WarningSHVWest Carroll65 min
Feb 19, 6:03 AM CSTFlash Flood WarningSHVWinn3 hr
Feb 19, 6:03 AM CSTFlash Flood WarningSHVBienville, Lincoln, Union3 hr
Feb 19, 6:03 AM CSTFlash Flood WarningSHVCaldwell, Franklin3 hr
Feb 18, 8:41 PM CSTSevere Thunderstorm WarningSHVBowie, Cass79 min
Feb 18, 11:48 PM CSTSevere Thunderstorm WarningSHVGregg87 min
Feb 19, 12:14 AM CSTSevere Thunderstorm WarningSHVCass61 min
Feb 19, 12:43 AM CSTSevere Thunderstorm WarningSHVHarrison, Marion77 min
Feb 19, 12:43 AM CSTSevere Thunderstorm WarningSHVLafayette, Miller77 min
Feb 19, 12:55 AM CSTTornado WarningSHVLafayette65 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1991Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.