Alert archive / Texas / Tornado Watches in 2005
Tornado Watch 894
The Storm Prediction Center issued this tornado watch at Dec 14, 2005, 10:12 AM CST for 18 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 14, 2005, 10:12 AM CST (16:12 UTC)
- Expired
- Dec 14, 2005, 5:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Austin County, TX, Brazoria 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, Newton County, TX, Orange County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 42 km from the middle of the area, began a volume at 16:16 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 11:18 AM CST | Severe Thunderstorm Warning | LCH | Jasper | 12 min |
| Dec 14, 11:25 AM CST | Severe Thunderstorm Warning | LCH | Newton | 65 min |
| Dec 14, 11:35 AM CST | Tornado Warning | HGX | Austin, Fort Bend | 40 min |
| Dec 14, 11:58 AM CST | Severe Thunderstorm Warning | LCH | Hardin | 62 min |
| Dec 14, 12:30 PM CST | Flash Flood Warning | HGX | Harris, Liberty, Montgomery | 4 hr |
| Dec 14, 12:46 PM CST | Severe Thunderstorm Warning | HGX | Harris | 44 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, 4.2 hours before the alert went out and 232 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 141609
SEL4
SPC WW 141609
TXZ000-CWZ000-142300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 894
NWS STORM PREDICTION CENTER NORMAN OK
1110 AM CDT WED DEC 14 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEAST TEXAS
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1110 AM UNTIL
600 PM CDT.
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 APPROXIMATELY ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 30 MILES WEST NORTHWEST OF PALACIOS
TEXAS TO 20 MILES EAST NORTHEAST OF PORT ARTHUR TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).
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...STRONG TO SEVERE THUNDERSTORMS...INCLUDING
SUPERCELLS...WILL DEVELOP FROM WEST TO EAST ACROSS THE WATCH THIS
AFTERNOON. LOW AND DEEP LAYER SHEAR REMAIN IMPRESSIVE AND RESULTANT
ISOLATED TORNADO/WIND DAMAGE POTENTIAL WILL INCREASE WITH AFTERNOON
HEATING. OTHERWISE...LARGE HAIL WILL ACCOMPANY STRONGER CORES
TODAY.
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
500. MEAN STORM MOTION VECTOR 26025.
...EVANS
294,0964 305,0934 291,0934 280,0964SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 9:42 AM CST | Mesoscale Discussion | SPC | Aransas, Austin, Brazoria, Calhoun, Chambers, Colorado and 17 more | 2 hr |
| Dec 14, 11:50 AM CST | Mesoscale Discussion | SPC | Jasper, Jefferson, Newton, Orange | 85 min |
| Dec 14, 1:04 PM CST | Mesoscale Discussion | SPC | Austin, Brazoria, Calhoun, Chambers, Colorado, Fort Bend and 11 more | 86 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.