Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 2

January 1, 19996 parishes in Louisiana; 46 counties in Texas

The Storm Prediction Center issued this tornado watch at Jan 1, 1999, 7:30 PM CST for 6 parishes in Louisiana; 46 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 1, 1999, 7:30 PM CST (01:30 UTC)
Expired
Jan 2, 1999, 1:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 52 counties

Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Red River Parish, LA, Webster Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cherokee County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Gonzales County, TX, Gregg County, TX, Grimes County, TX, Harris County, TX, Harrison County, TX, Houston County, TX, Jackson County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Madison County, TX, Marion County, TX, Matagorda County, TX, Montgomery County, TX, Nacogdoches County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Wilson County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 1, 7:30 PM CSTTornado WarningSHVSmith30 min
Jan 1, 7:32 PM CSTTornado WarningEWXGonzales63 min
Jan 1, 7:34 PM CSTSevere Thunderstorm WarningFWDRobertson41 min
Jan 1, 7:41 PM CSTSevere Thunderstorm WarningHGXHouston59 min
Jan 1, 7:51 PM CSTTornado WarningHGXBrazos59 min
Jan 1, 8:05 PM CSTFlash Flood WarningEWXGonzales2 hr
Jan 1, 8:20 PM CSTSevere Thunderstorm WarningSHVSmith30 min
Jan 1, 8:26 PM CSTSevere Thunderstorm WarningEWXFayette, Lavaca89 min
Jan 1, 8:28 PM CSTTornado WarningSHVUpshur32 min
Jan 1, 8:35 PM CSTSevere Thunderstorm WarningSHVCherokee, Rusk45 min
Jan 1, 8:35 PM CSTSevere Thunderstorm WarningSHVGregg45 min
Jan 1, 8:37 PM CSTSevere Thunderstorm WarningHGXMadison48 min
Jan 1, 8:48 PM CSTTornado WarningHGXHarris42 min
Jan 1, 8:50 PM CSTTornado WarningEWXLavaca65 min
Jan 1, 8:56 PM CSTSevere Thunderstorm WarningSHVHarrison44 min
Jan 1, 9:01 PM CSTTornado WarningHGXColorado44 min
Jan 1, 9:12 PM CSTSevere Thunderstorm WarningHGXGrimes, Washington63 min
Jan 1, 9:15 PM CSTSevere Thunderstorm WarningHGXHouston65 min
Jan 1, 9:19 PM CSTTornado WarningEWXGonzales, Lavaca61 min
Jan 1, 9:25 PM CSTFlash Flood WarningEWXLavaca3 hr
Jan 1, 9:35 PM CSTTornado WarningHGXMontgomery65 min
Jan 1, 9:47 PM CSTTornado WarningHGXHarris63 min
Jan 1, 9:50 PM CSTTornado WarningHGXSan Jacinto65 min
Jan 1, 9:53 PM CSTTornado WarningSHVPanola32 min
Jan 1, 10:10 PM CSTSevere Thunderstorm WarningHGXWalker65 min
Jan 1, 10:11 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo59 min
Jan 1, 10:23 PM CSTSevere Thunderstorm WarningSHVDe Soto47 min
Jan 1, 10:34 PM CSTTornado WarningHGXPolk61 min
Jan 1, 10:41 PM CSTTornado WarningHGXMontgomery64 min
Jan 1, 10:43 PM CSTFlash Flood WarningEWXFayette, Gonzales92 min
Jan 1, 10:43 PM CSTSevere Thunderstorm WarningEWXFayette, Gonzales92 min
Jan 1, 10:43 PM CSTSevere Thunderstorm WarningSHVNacogdoches62 min
Jan 1, 10:46 PM CSTTornado WarningHGXHarris64 min
Jan 1, 10:58 PM CSTSevere Thunderstorm WarningSHVWebster47 min
Jan 1, 11:31 PM CSTFlash Flood WarningEWXFayette, Lavaca119 min
Jan 1, 11:49 PM CSTSevere Thunderstorm WarningHGXHarris61 min

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.5 hours before the alert went out and 283 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 1999-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 437 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 1999-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 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
437 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

999 
WWUS9 KMKC 020100
SEL2  
MKC WW 020100
TXZ000-LAZ000-020700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 2
STORM PREDICTION CENTER NORMAN OK
700 PM CST FRI JAN 1 1999

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EAST TEXAS                              
   NORTHWEST LOUISIANA                          

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 730 PM UNTIL
100 AM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 20 MILES WEST SOUTHWEST OF VICTORIA TEXAS TO 40
MILES NORTH OF SHREVEPORT LOUISIANA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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 TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 1.  WATCH NUMBER 1 WILL NOT BE IN EFFECT AFTER 730 PM CST.

DISCUSSION...LINE OF THUNDERSTORMS HAS DEVELOPED AHEAD OF STRONG
UPPER TROUGH. WIND FIELDS ARE EXPECTED TO INCREASE WITH TIME THIS
EVENING...FAVORING POSSIBLE SUPERCELL DEVELOPMENT...DESPITE LINEAR
NATURE OF CURRENT ACTIVITY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 24035.

...VESCIO

284,0982 330,0950 330,0923 284,0955

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 1, 11:00 PM CSTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 28 more6 hr
Jan 2, 3:00 AM CSTTornado WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 22 more6 hr

Nearby

Tornado Watches in Texas, 1999Tornado Watches in Louisiana, 1999Every tornado watch in 1999

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.