Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 39

January 29, 199917 parishes in Louisiana; 39 counties in Texas

The Storm Prediction Center issued this tornado watch at Jan 29, 1999, 1:15 PM CST for 17 parishes in Louisiana; 39 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jan 29, 1999, 1:15 PM CST (19:15 UTC)
Expired: Jan 29, 1999, 7:00 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 56 counties

Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Bastrop County, TX, Bell County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Coryell County, TX, Falls County, TX, Fayette County, TX, Grimes County, TX, Guadalupe County, TX, Hardin County, TX, Hays County, TX, Houston County, TX, Jasper County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Robertson County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX

The radar

The Houston radar (KHGX), 176 km from the middle of the area, began a volume at 19:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jan 29, 2:01 PM CST	Flash Flood Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	4 hr
Jan 29, 2:01 PM CST	Flash Flood Warning	SHV	Sabine	4 hr
Jan 29, 2:08 PM CST	Tornado Warning	LCH	Allen	47 min
Jan 29, 2:17 PM CST	Tornado Warning	LCH	Rapides	63 min
Jan 29, 2:30 PM CST	Tornado Warning	LCH	Jasper	50 min
Jan 29, 3:17 PM CST	Tornado Warning	LCH	Newton	33 min
Jan 29, 4:06 PM CST	Flash Flood Warning	LCH	Rapides, Vernon	119 min
Jan 29, 4:06 PM CST	Flash Flood Warning	LCH	Jasper, Newton	119 min
Jan 29, 4:33 PM CST	Flash Flood Warning	JAN	Catahoula, Concordia, Tensas	5 hr
Jan 29, 4:33 PM CST	Flash Flood Warning	JAN	Franklin	5 hr
Jan 29, 4:54 PM CST	Severe Thunderstorm Warning	HGX	Burleson	61 min
Jan 29, 5:10 PM CST	Flash Flood Warning	FWD	Freestone, Leon, Limestone, Robertson	3 hr
Jan 29, 5:33 PM CST	Severe Thunderstorm Warning	FWD	Limestone	42 min
Jan 29, 5:49 PM CST	Tornado Warning	LCH	Rapides	61 min
Jan 29, 5:49 PM CST	Severe Thunderstorm Warning	HGX	Brazos	61 min
Jan 29, 6:07 PM CST	Flash Flood Warning	LCH	Avoyelles, Rapides	118 min

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.3 hours before the alert went out and 233 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

999 
WWUS9 KMKC 291849
SEL9  
MKC WW 291849
TXZ000-LAZ000-300100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 39
STORM PREDICTION CENTER NORMAN OK
1249 PM CST FRI JAN 29 1999

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

   CENTRAL AND EASTERN TEXAS                              
   CENTRAL AND SOUTHERN LOUISIANA                          

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 115 PM UNTIL 700
PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF AUSTIN TEXAS TO 40
MILES EAST OF ALEXANDRIA 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.


DISCUSSION... E/W BOUNDARY EXTENDS ACROSS CENTRAL/ERN TX INTO
CENTRAL LA. VERY MOIST AND UNSTABLE WARM SECTOR COUPLED WITH
VEERING WIND PROFILES...FAVOR DEVELOPMENT OF SEVERE THUNDERSTORMS
AND SUPERCELLS VICINITY OF BOUNDARY.  ADDITIONALLY A SQUALL LINE
LIKELY TO DEVELOP DURING AFTERNOON ALONG COLD FRONT MOVING INTO
CENTRAL TX AHEAD OF STRONG UPPER LOW.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 520. 
MEAN STORM MOTION VECTOR 23035.


...HALES

312,0980 322,0913 302,0913 292,0980

Nearby

Tornado Watches in Texas, 1999 Tornado Watches in Louisiana, 1999 Every 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; radar from the NEXRAD Level II archive.