Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 9, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Apr 26, 2011, 11:15 PM CDT for Houston County, Trinity County, Texas. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 26, 2011, 11:15 PM CDT (04:15 UTC)
- Expired
- Apr 27, 2011, 12:00 AM CDT
- In force
- 45 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Houston County, TX, Trinity County, TX
The radar
The Shreveport radar (KSHV), 164 km from the middle of the area, began a volume at 04:18 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 26, 11:35 PM CDT | TSTM WND DMG | Latexo, TX | TREES DOWN IN LATEXO ON 1535. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 26, 9:42 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 4.3 hours before the alert went out and 172 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
- 2270 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 961 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 281 m²/s²
- 0-3 km storm-relative helicity
- 428 m²/s²
- Significant tornado parameter
- 5.6
- Supercell composite
- 23.5
The text
As transmitted, in the capitals the NWS used until 2016.
305
WFUS54 KHGX 270415
TORHGX
TXC225-455-270500-
/O.NEW.KHGX.TO.W.0009.110427T0415Z-110427T0500Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1115 PM CDT TUE APR 26 2011
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN HOUSTON COUNTY IN SOUTHEAST TEXAS...
NORTHEASTERN TRINITY COUNTY IN SOUTHEAST TEXAS...
* UNTIL MIDNIGHT CDT
* AT 1110 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS TORNADO
WAS LOCATED NEAR KENNARD... MOVING EAST AT 40 MPH.
* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
WECHES...PENNINGTON...APPLE SPRINGS...LATEXO...GRAPELAND AND
CROCKETT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR A TORNADO - TAKE COVER NOW!
A TORNADO WATCH IS IN EFFECT UNTIL 5 AM CDT WEDNESDAY FOR THE WARNED
AREA.
&&
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 3158 9514 3152 9509 3148 9510 3145 9501
3140 9495 3135 9495 3133 9490 3129 9488
3126 9488 3124 9485 3117 9482 3120 9549
3157 9549 3159 9525
TIME...MOT...LOC 0415Z 275DEG 35KT 3136 9505
$$1 follow-up statement
338
WWUS54 KHGX 270443
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1143 PM CDT TUE APR 26 2011
TXC225-455-270500-
/O.CON.KHGX.TO.W.0009.000000T0000Z-110427T0500Z/
HOUSTON TX-TRINITY TX-
1143 PM CDT TUE APR 26 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR TRINITY
AND HOUSTON COUNTIES...
AT 1139 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS DEVELOPING TORNADO IS FROM A NEW STORM
LOCATED NEAR CROCKETT...MOVING EAST AT 50 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WECHES...KENNARD AND APPLE SPRINGS
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR A TORNADO - TAKE COVER NOW!
A TORNADO WATCH IS IN EFFECT UNTIL 5 AM CDT WEDNESDAY FOR THE WARNED
AREA.
&&
LAT...LON 3158 9514 3152 9509 3148 9510 3145 9501
3140 9495 3135 9495 3133 9490 3129 9488
3126 9488 3124 9485 3117 9482 3120 9549
3157 9549 3159 9525
TIME...MOT...LOC 0442Z 271DEG 49KT 3133 9537
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 10:03 PM CDT | Tornado Warning | HGX | Houston | 42 min |
| Apr 26, 10:43 PM CDT | Tornado Warning | HGX | Houston | 47 min |
| Apr 26, 11:28 PM CDT | Tornado Warning | HGX | Houston, Madison, Trinity, Walker | 47 min |
| Apr 26, 11:55 PM CDT | Tornado Warning | HGX | Houston, Polk, Trinity | 50 min |
| Apr 27, 12:07 AM CDT | Tornado Warning | HGX | Houston, Trinity | 38 min |
| Apr 27, 12:32 AM CDT | Tornado Warning | HGX | Houston, Trinity | 43 min |
| Apr 27, 12:55 AM CDT | Tornado Warning | HGX | Polk | 35 min |
| Apr 27, 4:22 AM CDT | Red Flag Warning | HGX | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 16 hr |
Nearby
Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.