Alert archive / Texas / Tornado Watches in 2004
Tornado Watch 880
The Storm Prediction Center issued this tornado watch at Nov 22, 2004, 1:35 PM CST for 22 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 22, 2004, 1:35 PM CST (19:35 UTC)
- Expired
- Nov 22, 2004, 7:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 22 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, 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 19:35 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 |
|---|---|---|---|---|
| Nov 22, 2:05 PM CST | Tornado Warning | HGX | Harris | 25 min |
| Nov 22, 2:33 PM CST | Tornado Warning | HGX | Harris | 27 min |
| Nov 22, 2:53 PM CST | Flash Flood Warning | HGX | Harris | 3 hr |
| Nov 22, 2:57 PM CST | Flash Flood Warning | EWX | Lavaca | 3 hr |
| Nov 22, 3:04 PM CST | Tornado Warning | HGX | Harris | 26 min |
| Nov 22, 3:07 PM CST | Flash Flood Warning | HGX | Austin, Colorado | 3 hr |
| Nov 22, 3:33 PM CST | Tornado Warning | HGX | Harris | 27 min |
| Nov 22, 3:35 PM CST | Flash Flood Warning | EWX | DeWitt, Karnes | 3 hr |
| Nov 22, 3:43 PM CST | Tornado Warning | HGX | Liberty | 32 min |
| Nov 22, 4:20 PM CST | Tornado Warning | HGX | Liberty | 25 min |
| Nov 22, 4:48 PM CST | Flash Flood Warning | EWX | Bexar, Caldwell, Comal, Gonzales, Guadalupe, Hays | 4 hr |
| Nov 22, 4:56 PM CST | Tornado Warning | HGX | Harris | 34 min |
| Nov 22, 4:58 PM CST | Tornado Warning | HGX | Fort Bend | 32 min |
| Nov 22, 5:17 PM CST | Flash Flood Warning | HGX | Wharton | 3 hr |
| Nov 22, 5:45 PM CST | Flash Flood Warning | EWX | DeWitt, Karnes, Lavaca | 3 hr |
| Nov 22, 6:13 PM CST | Flash Flood Warning | HGX | Jackson | 3 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, 7.6 hours before the alert went out and 226 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 221935
SEL0
SPC WW 221935
TXZ000-CWZ000-230100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 880
NWS STORM PREDICTION CENTER NORMAN OK
135 PM 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 AFTERNOON AND EVENING FROM 135 PM UNTIL 700
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 30 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.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 879. WATCH NUMBER 879 WILL NOT BE IN EFFECT AFTER 135
PM CST.
DISCUSSION...STRONG/ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED TO
CONTINUE TO DEVELOP VICINITY E/W BOUNDARY. LOW LEVEL SHEAR ALONG
WITH MDT INSTABILITY SUPPORT SUPERCELLS AND ISOLATED 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 24030.
...HALES
293,0983 304,0935 293,0933 283,0981SPC 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, 9:10 AM CST | Tornado Watch | SPC | Austin, Bexar, Caldwell, Chambers, Colorado, DeWitt and 17 more | 5 hr |
| 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, 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.