Alert archive / Texas / Tornado Warnings in 2012
Tornado Warning 36, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Aug 21, 2012, 5:46 PM CDT for Chambers County, Texas. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2012, 5:46 PM CDT (22:46 UTC)
- Expired
- Aug 21, 2012, 6:15 PM CDT
- In force
- 29 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
County Chambers County, TX
The radar
The Houston radar (KHGX), 33 km from the middle of the area, began a volume at 22:47 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.8 hours before the alert went out and 167 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
- 339 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1015 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
149
WFUS54 KHGX 212246
TORHGX
TXC071-212315-
/O.NEW.KHGX.TO.W.0036.120821T2246Z-120821T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
546 PM CDT TUE AUG 21 2012
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
EXTREME WEST CENTRAL CHAMBERS COUNTY IN SOUTHEAST TEXAS...
* UNTIL 615 PM CDT
* AT 536 PM CDT...CHAMBERS COUNTY SHERIFF REPORTING A
WATERSPOUT JUST OFF THE COAST OF BEACH CITY THAT IS
CURRENTLY APPROACHING THE COAST NEAR FM 2354. RESIDENTS IN THE
AREA SHOULD TAKE COVER NOW.
* THIS TORNADIC THUNDERSTORM WILL AFFECT THE BEACH CITY AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 2972 9485 2970 9486 2968 9486 2965 9492
2967 9493 2977 9487 2975 9483
TIME...MOT...LOC 2236Z 271DEG 0KT 2968 9483
$$1 follow-up statement
170
WWUS54 KHGX 212312
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
612 PM CDT TUE AUG 21 2012
TXC071-212315-
/O.CON.KHGX.TO.W.0036.000000T0000Z-120821T2315Z/
CHAMBERS TX-
612 PM CDT TUE AUG 21 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
EXTREME WEST CENTRAL CHAMBERS COUNTY...
AT 600 PM CDT...DOPPLER RADAR CONTINUES TO SHOW A
THUNDERSTORM SITUATED JUST ALONG THE COAST OF WESTERN
CHAMBERS COUNTY...GENERALLY ALONG AND SOUTH OF FM 2354.
RECENT REPORTS INDICATE THE WATERSPOUT MOVED JUST INLAND...AND
TECHNICALLY BECAME A TORNADO...ALONG THE COAST NEAR BEACH CITY THEN
LIFTED. NO DAMAGE WAS REPORTED. THIS STORM IS STILL BEING
MONITORED...BUT THE TORNADO WARNING WILL LIKELY BE ALLOWED TO
EXPIRE AT 615 PM ASSUMING NO SIGNIFICANT CHANGES ARE NOTED.
LOCATIONS IMPACTED INCLUDE...
AREAS ALONG FM 2354 IN SOUTHWEST CHAMBERS COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 2968 9487 2965 9492 2967 9492 2967 9493
2969 9489 2970 9487 2968 9486
TIME...MOT...LOC 2300Z 271DEG 0KT 2968 9483
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 5:46 PM CDT | Special Marine Warning | HGX | 38 min | |
| Aug 21, 6:22 PM CDT | Special Marine Warning | HGX | 36 min |
Nearby
Tornado Warnings in Texas, 2012Every tornado warning in 2012Tornadoes in 2012
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.