Alert archive / Texas / Tornado Watches in 2004
Tornado Watch 884
The Storm Prediction Center issued this tornado watch at Nov 23, 2004, 9:45 AM CST for 11 parishes in Louisiana; 31 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 23, 2004, 9:45 AM CST (15:45 UTC)
- Expired
- Nov 23, 2004, 3:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 42 counties
Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, De Soto Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Refugio County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 33 km from the middle of the area, began a volume at 15:47 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 23, 9:52 AM CST | Severe Thunderstorm Warning | HGX | Galveston | 38 min |
| Nov 23, 11:19 AM CST | Tornado Warning | HGX | Chambers, Galveston | 26 min |
| Nov 23, 1:07 PM CST | Tornado Warning | HGX | Montgomery, San Jacinto | 38 min |
| Nov 23, 1:46 PM CST | Tornado Warning | HGX | Austin, Polk, San Jacinto, Washington | 44 min |
| Nov 23, 1:53 PM CST | Flash Flood Warning | HGX | Trinity | 3 hr |
| Nov 23, 2:37 PM CST | Tornado Warning | HGX | Chambers, Harris, Liberty | 38 min |
| Nov 23, 2:46 PM CST | Tornado Warning | HGX | Trinity | 29 min |
| Nov 23, 2:56 PM CST | Tornado Warning | HGX | Waller | 34 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.8 hours before the alert went out and 205 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
- 534 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1172 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 231543
SEL4
SPC WW 231545
LAZ000-TXZ000-CWZ000-232100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 884
NWS STORM PREDICTION CENTER NORMAN OK
945 AM CST TUE NOV 23 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WESTERN AND CENTRAL LOUISIANA
SOUTHEAST TEXAS
COASTAL WATERS
EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 945 AM UNTIL 300
PM CST.
TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES SOUTH OF PALACIOS TEXAS TO 65 MILES
NORTHWEST 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.
OTHER WATCH INFORMATION...CONTINUE...WW 883...
DISCUSSION...WITH AIR MASS BECOMING VERY UNSTABLE SERN TX/SWRN
LA...COUPLED WITH INCREASINGLY FAVORABLE DEEP LAYER SHEAR AHEAD OF
STRONG TROUGH...SUPERCELL THUNDERSTORMS EXPECTED TO DEVELOP ACROSS
WATCH AREA NEXT SEVERAL HOURS. ASSOCIATED TORNADO POTENTIAL WILL
INCREASE THRU THE AFTERNOON HOURS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24040.
...HALES
280,0974 320,0943 320,0913 280,0944SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 6:03 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 26 more | 2 hr |
| Nov 23, 11:10 AM CST | Mesoscale Discussion | SPC | Avoyelles, Concordia, Madison, Tensas | 3 hr |
| Nov 23, 11:38 AM CST | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, Grant, LaSalle, Natchitoches and 4 more | 2 hr |
| Nov 23, 12:48 PM CST | Mesoscale Discussion | SPC | Bossier, Caddo, De Soto, Grant, Natchitoches, Sabine and 1 more | 117 min |
| Nov 23, 2:00 PM CST | Tornado Watch | SPC | Allen, Beauregard, Bienville, Bossier, Caddo, Calcasieu and 19 more | 7 hr |
| Nov 23, 3:21 PM CST | Mesoscale Discussion | SPC | Allen, Beauregard, Bienville, Bossier, Caddo, Calcasieu and 19 more | 114 min |
| Nov 23, 5:30 PM CST | Mesoscale Discussion | SPC | Beauregard, Caldwell, Catahoula, Franklin, Grant, Jackson and 7 more | 2 hr |
| Nov 22, 10:30 PM CST | Mesoscale Discussion | SPC | Borden, Coke, Crockett, Dawson, Fisher, Garza and 21 more | 2 hr |
| Nov 22, 11:00 PM CST | Tornado Watch | SPC | Andrews, Borden, Coke, Crane, Crockett, Dawson and 22 more | 6 hr |
| Nov 23, 2:58 AM CST | Mesoscale Discussion | SPC | Borden, Coke, Crockett, Fisher, Glasscock, Howard and 11 more | 92 min |
| Nov 23, 4:10 AM CST | Severe Thunderstorm Watch | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 19 more | 5 hr |
| Nov 23, 7:06 AM CST | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bastrop, Bell, Blanco and 46 more | 84 min |
| Nov 23, 7:19 AM CST | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Concho, Denton and 13 more | 86 min |
| Nov 23, 7:40 AM CST | Mesoscale Discussion | SPC | Dallam | 6 hr |
| Nov 23, 8:45 AM CST | Tornado Watch | SPC | Anderson, Austin, Bastrop, Bell, Blanco, Brazos and 47 more | 6 hr |
| Nov 23, 9:15 AM CST | Mesoscale Discussion | SPC | Collin, Dallas, Delta, Denton, Fannin, Grayson and 5 more | 3 hr |
| Nov 23, 10:37 AM CST | Mesoscale Discussion | SPC | Anderson, Austin, Bastrop, Bell, Blanco, Brazos and 47 more | 113 min |
| Nov 23, 12:15 PM CST | Mesoscale Discussion | SPC | Carson, Dallam, Hansford, Hartley, Hutchinson, Moore and 3 more | 5 hr |
| Nov 23, 12:16 PM CST | Mesoscale Discussion | SPC | Bosque, Brown, Coke, Coleman, Concho, Coryell and 22 more | 2 hr |
| Nov 23, 2:14 PM CST | Mesoscale Discussion | SPC | Briscoe, Childress, Cottle, Crosby, Dickens, Fisher and 20 more | 3 hr |
| Nov 23, 3:15 PM CST | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bexar, Blanco, Bosque, Brown and 40 more | 5 hr |
| Nov 23, 5:30 PM CST | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 64 more | 6 hr |
Nearby
Tornado Watches in Texas, 2004Tornado Watches in Louisiana, 2004Every tornado watch in 2004
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.