Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 2
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 7:30 PM CST | Tornado Warning | SHV | Smith | 30 min |
| Jan 1, 7:32 PM CST | Tornado Warning | EWX | Gonzales | 63 min |
| Jan 1, 7:34 PM CST | Severe Thunderstorm Warning | FWD | Robertson | 41 min |
| Jan 1, 7:41 PM CST | Severe Thunderstorm Warning | HGX | Houston | 59 min |
| Jan 1, 7:51 PM CST | Tornado Warning | HGX | Brazos | 59 min |
| Jan 1, 8:05 PM CST | Flash Flood Warning | EWX | Gonzales | 2 hr |
| Jan 1, 8:20 PM CST | Severe Thunderstorm Warning | SHV | Smith | 30 min |
| Jan 1, 8:26 PM CST | Severe Thunderstorm Warning | EWX | Fayette, Lavaca | 89 min |
| Jan 1, 8:28 PM CST | Tornado Warning | SHV | Upshur | 32 min |
| Jan 1, 8:35 PM CST | Severe Thunderstorm Warning | SHV | Cherokee, Rusk | 45 min |
| Jan 1, 8:35 PM CST | Severe Thunderstorm Warning | SHV | Gregg | 45 min |
| Jan 1, 8:37 PM CST | Severe Thunderstorm Warning | HGX | Madison | 48 min |
| Jan 1, 8:48 PM CST | Tornado Warning | HGX | Harris | 42 min |
| Jan 1, 8:50 PM CST | Tornado Warning | EWX | Lavaca | 65 min |
| Jan 1, 8:56 PM CST | Severe Thunderstorm Warning | SHV | Harrison | 44 min |
| Jan 1, 9:01 PM CST | Tornado Warning | HGX | Colorado | 44 min |
| Jan 1, 9:12 PM CST | Severe Thunderstorm Warning | HGX | Grimes, Washington | 63 min |
| Jan 1, 9:15 PM CST | Severe Thunderstorm Warning | HGX | Houston | 65 min |
| Jan 1, 9:19 PM CST | Tornado Warning | EWX | Gonzales, Lavaca | 61 min |
| Jan 1, 9:25 PM CST | Flash Flood Warning | EWX | Lavaca | 3 hr |
| Jan 1, 9:35 PM CST | Tornado Warning | HGX | Montgomery | 65 min |
| Jan 1, 9:47 PM CST | Tornado Warning | HGX | Harris | 63 min |
| Jan 1, 9:50 PM CST | Tornado Warning | HGX | San Jacinto | 65 min |
| Jan 1, 9:53 PM CST | Tornado Warning | SHV | Panola | 32 min |
| Jan 1, 10:10 PM CST | Severe Thunderstorm Warning | HGX | Walker | 65 min |
| Jan 1, 10:11 PM CST | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 59 min |
| Jan 1, 10:23 PM CST | Severe Thunderstorm Warning | SHV | De Soto | 47 min |
| Jan 1, 10:34 PM CST | Tornado Warning | HGX | Polk | 61 min |
| Jan 1, 10:41 PM CST | Tornado Warning | HGX | Montgomery | 64 min |
| Jan 1, 10:43 PM CST | Flash Flood Warning | EWX | Fayette, Gonzales | 92 min |
| Jan 1, 10:43 PM CST | Severe Thunderstorm Warning | EWX | Fayette, Gonzales | 92 min |
| Jan 1, 10:43 PM CST | Severe Thunderstorm Warning | SHV | Nacogdoches | 62 min |
| Jan 1, 10:46 PM CST | Tornado Warning | HGX | Harris | 64 min |
| Jan 1, 10:58 PM CST | Severe Thunderstorm Warning | SHV | Webster | 47 min |
| Jan 1, 11:31 PM CST | Flash Flood Warning | EWX | Fayette, Lavaca | 119 min |
| Jan 1, 11:49 PM CST | Severe Thunderstorm Warning | HGX | Harris | 61 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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 11:00 PM CST | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 28 more | 6 hr |
| Jan 2, 3:00 AM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 22 more | 6 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.