Alert archive / Texas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 142

April 2, 200010 parishes in Louisiana; 27 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 2, 2000, 1:30 AM CST for 10 parishes in Louisiana; 27 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 2, 2000, 1:30 AM CST (07:30 UTC)
Expired
Apr 2, 2000, 8:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 37 counties

Beauregard Parish, LA, Bienville Parish, LA, De Soto Parish, LA, Grant Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

Warnings issued inside it

20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 2, 3:11 AM CDTSevere Thunderstorm WarningHGXFort Bend, Harris49 min
Apr 2, 3:30 AM CDTSevere Thunderstorm WarningSHVRed River45 min
Apr 2, 3:30 AM CDTSevere Thunderstorm WarningHGXPolk45 min
Apr 2, 3:30 AM CDTSevere Thunderstorm WarningLCHTyler60 min
Apr 2, 3:32 AM CDTSevere Thunderstorm WarningHGXHarris, Waller43 min
Apr 2, 3:35 AM CDTSevere Thunderstorm WarningSHVShelby55 min
Apr 2, 3:39 AM CDTSevere Thunderstorm WarningSHVBienville66 min
Apr 2, 3:50 AM CDTSevere Thunderstorm WarningLCHJasper55 min
Apr 2, 3:55 AM CDTSevere Thunderstorm WarningHGXMontgomery35 min
Apr 2, 4:02 AM CDTFlash Flood WarningHGXMontgomery3 hr
Apr 2, 4:11 AM CDTSevere Thunderstorm WarningHGXHarris49 min
Apr 2, 4:21 AM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto54 min
Apr 2, 4:38 AM CDTSevere Thunderstorm WarningHGXLiberty52 min
Apr 2, 4:58 AM CDTSevere Thunderstorm WarningLCHHardin, Tyler62 min
Apr 2, 5:05 AM CDTFlash Flood WarningHGXHarris115 min
Apr 2, 5:07 AM CDTSevere Thunderstorm WarningHGXHarris53 min
Apr 2, 5:55 AM CDTSevere Thunderstorm WarningHGXHarris, Liberty50 min
Apr 2, 6:10 AM CDTSevere Thunderstorm WarningLCHVernon65 min
Apr 2, 6:32 AM CDTSevere Thunderstorm WarningLCHHardin, Tyler58 min
Apr 2, 7:43 AM CDTSevere Thunderstorm WarningHGXFort Bend47 min

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 7.5 hours before the alert went out and 185 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, Lake Charles Mun, LA at 00:00Z on 2000-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2474 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, Lake Charles Mun, LA at 00:00Z on 2000-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
2474 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
2.1
Supercell composite
10.5

Open this sounding in Storm Lab

The text

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

650 
WWUS9 KMKC 020731
SEL2  

SEL2  
MKC WW 020726
LAZ000-TXZ000-021300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 142
STORM PREDICTION CENTER NORMAN OK
126 AM CST SUN APR 2 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   WESTERN AND NORTHERN LOUISIANA                          
   SOUTHEAST TEXAS                              

EFFECTIVE THIS SUNDAY MORNING FROM 145 AM CST UNTIL 800 AM CDT.

HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES
EITHER SIDE OF A LINE FROM 30 MILES NORTHWEST OF PALACIOS TEXAS TO
45 MILES NORTH NORTHWEST OF ALEXANDRIA LOUISIANA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 141.  WATCH NUMBER 141 WILL NOT BE
IN EFFECT AFTER 145 AM CST.

DISCUSSION...STRONG/SEVERE THUNDERSTORMS CONTINUE TO DEVELOP FROM
PARTS OF SOUTHEAST TEXAS INTO NORTHWEST LOUISIANA.  ACTIVITY IS
DEVELOPING IN VERY MOIST AND UNSTABLE AIR MASS WITH MUCAPE TO 3000
J/KG.  STRONG SOUTHWESTERLY FLOW ALOFT WITH 50-60 KT WINDS AT 500
MB IS CREATING FAVORABLE DEEP LAYER SHEAR FOR SEVERE STORMS TO
PERSIST THROUGH THE EARLY MORNING HOURS.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 23035.


...WEISS

294,0970 323,0930 312,0920 282,0960

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 2, 4:00 AM CDTSevere Thunderstorm WatchSPCBienville, Caldwell, Catahoula, East Carroll, Franklin, Grant and 11 more4 hr
Apr 2, 12:30 PM CDTTornado WatchSPCAcadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 5 more6 hr
Apr 2, 3:00 PM CDTTornado WatchSPCCatahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more6 hr
Apr 2, 6:00 PM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 7 more6 hr
Apr 1, 8:00 PM CSTSevere Thunderstorm WatchSPCAtascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 25 more6 hr

Nearby

Severe Thunderstorm Watches in Texas, 2000Severe Thunderstorm Watches in Louisiana, 2000Every severe thunderstorm watch 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.