Alert archive / Texas / Tornado Watches in 2004
Tornado Watch 879
The Storm Prediction Center issued this tornado watch at Nov 22, 2004, 9:10 AM CST for 23 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 22, 2004, 9:10 AM CST (15:10 UTC)
- Expired
- Nov 22, 2004, 2:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Austin County, TX, Bexar County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Gonzales County, TX, Guadalupe County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jefferson County, TX, Karnes County, TX, Lavaca County, TX, Liberty County, TX, Montgomery County, TX, Orange County, TX, Victoria County, TX, Waller County, TX, Wharton County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 138 km from the middle of the area, began a volume at 15:11 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 9:10 AM CST | Tornado Warning | HGX | Harris | 35 min |
| Nov 22, 9:26 AM CST | Severe Thunderstorm Warning | EWX | Caldwell, Guadalupe | 64 min |
| Nov 22, 9:41 AM CST | Flash Flood Warning | EWX | Bastrop, Caldwell, Fayette, Gonzales | 3 hr |
| Nov 22, 9:46 AM CST | Tornado Warning | HGX | Harris | 44 min |
| Nov 22, 9:54 AM CST | Flash Flood Warning | EWX | Bexar, Comal, Kendall | 3 hr |
| Nov 22, 10:33 AM CST | Tornado Warning | HGX | Harris | 27 min |
| Nov 22, 11:05 AM CST | Flash Flood Warning | EWX | Bastrop, Caldwell, Fayette, Gonzales, Guadalupe | 6 hr |
| Nov 22, 11:18 AM CST | Tornado Warning | HGX | Chambers, Harris, Liberty | 27 min |
| Nov 22, 11:49 AM CST | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 41 min |
| Nov 22, 12:12 PM CST | Flash Flood Warning | HGX | Austin, Colorado | 3 hr |
| Nov 22, 12:40 PM CST | Flash Flood Warning | EWX | Bexar, Comal | 4 hr |
| Nov 22, 12:45 PM CST | Tornado Warning | HGX | Austin | 30 min |
| Nov 22, 1:14 PM CST | Severe Thunderstorm Warning | EWX | Gonzales | 61 min |
| Nov 22, 1:24 PM CST | Severe Thunderstorm Warning | HGX | Fort Bend, Harris, Waller | 36 min |
| Nov 22, 1:30 PM CST | Flash Flood Warning | EWX | Wilson | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 3.2 hours before the alert went out and 221 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
- 1000 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 221510
SEL9
SPC WW 221510
TXZ000-CWZ000-222000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 879
NWS STORM PREDICTION CENTER NORMAN OK
910 AM CST MON NOV 22 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTH CENTRAL AND SOUTHEAST TEXAS
COASTAL WATERS
EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 910 AM UNTIL 200
PM CST.
TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS ALONG AND 40 STATUTE MILES EITHER SIDE
OF A LINE FROM 35 MILES SOUTH OF SAN ANTONIO TEXAS TO 25 MILES
NORTHEAST OF PORT ARTHUR TEXAS.
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...VERY MOIST AND MODERATELY UNSTABLE AIRMASS CONTINUES TO
FEED INTO STRONG THUNDERSTORMS SCENTRAL TX. WITH SFC-6KM SHEAR OF
50KT AND 1KM SHEAR 20-25 KT CONDITIONS WILL BE FAVORABLE FOR
SUPERCELLS ALONG WITH TORNADO POTENTIAL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 23030.
...HALES
293,0983 304,0935 293,0933 282,0981SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 6:18 AM CST | Mesoscale Discussion | SPC | Austin, Bastrop, Bexar, Caldwell, Chambers, Colorado and 19 more | 87 min |
| Nov 22, 10:49 AM CST | Mesoscale Discussion | SPC | Atascosa, Austin, Bexar, Brazoria, Chambers, Colorado and 21 more | 116 min |
| Nov 22, 12:56 PM CST | Mesoscale Discussion | SPC | Atascosa, Austin, Bexar, Brazoria, Chambers, Colorado and 20 more | 64 min |
| Nov 22, 1:35 PM CST | Tornado Watch | SPC | Austin, Bexar, Caldwell, Chambers, Colorado, DeWitt and 16 more | 5 hr |
| Nov 22, 3:31 PM CST | Mesoscale Discussion | SPC | El Paso, Hudspeth | 2 hr |
| Nov 22, 3:34 PM CST | Mesoscale Discussion | SPC | Austin, Bee, Brazoria, Calhoun, Chambers, Colorado and 18 more | 116 min |
Nearby
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.