Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 13, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Apr 27, 2011, 12:32 AM CDT for Houston County, Trinity County, Texas. It was in force for 43 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
- Apr 27, 2011, 12:32 AM CDT (05:32 UTC)
- Expired
- Apr 27, 2011, 1:15 AM CDT
- In force
- 43 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Houston County, TX, Trinity County, TX
The radar
The Shreveport radar (KSHV), 178 km from the middle of the area, began a volume at 05:32 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 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, 5.5 hours before the alert went out and 187 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.
845
WFUS54 KHGX 270532
TORHGX
TXC225-455-270615-
/O.NEW.KHGX.TO.W.0013.110427T0532Z-110427T0615Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1232 AM CDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL HOUSTON COUNTY IN SOUTHEAST TEXAS...
NORTHERN TRINITY COUNTY IN SOUTHEAST TEXAS...
* UNTIL 115 AM CDT
* AT 1226 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO AND LARGE
HAIL. THIS TORNADO WAS LOCATED 2 MILES EAST OF LOVELADY...MOVING
EAST AT 55 MPH.
* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
PENNINGTON...APPLE SPRINGS...AND GROVETON.
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 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 3133 9489 3129 9488 3126 9488 3124 9485
3116 9482 3102 9499 3104 9518 3111 9547
3125 9546 3138 9538 3138 9517
TIME...MOT...LOC 0530Z 274DEG 50KT 3115 9530
$$2 follow-up statements
305
WWUS54 KHGX 270552
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1252 AM CDT WED APR 27 2011
TXC225-270600-
/O.CAN.KHGX.TO.W.0013.000000T0000Z-110427T0615Z/
HOUSTON TX-
1252 AM CDT WED APR 27 2011
...THE TORNADO WARNING FOR HOUSTON COUNTY IS CANCELLED...
THE STORM HAS MOVED OUT OF THE COUNTY.
&&
LAT...LON 3105 9516 3116 9518 3125 9513 3133 9489
3129 9488 3126 9488 3124 9485 3116 9482
3102 9499
TIME...MOT...LOC 0550Z 274DEG 50KT 3113 9498
$$
TXC455-270615-
/O.CON.KHGX.TO.W.0013.000000T0000Z-110427T0615Z/
TRINITY TX-
1252 AM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR TRINITY
COUNTY...
AT 1248 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED 7 MILES SOUTH OF APPLE
SPRINGS...MOVING EAST AT 55 MPH.
THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED COUNTY IN THE VICINITY OF FM 357 AND 2262.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM MAY PRODUCE LARGE DAMAGING HAIL...RESULTING IN EXTENSIVE
PROPERTY DAMAGE OR SERIOUS INJURY. AVOID WINDOWS AND TAKE COVER NOW!
TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR A TORNADO - TAKE COVER NOW!
&&
LAT...LON 3105 9516 3116 9518 3125 9513 3133 9489
3129 9488 3126 9488 3124 9485 3116 9482
3102 9499
TIME...MOT...LOC 0550Z 274DEG 50KT 3113 9498
$$923
WWUS54 KHGX 270610
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
110 AM CDT WED APR 27 2011
TXC455-270621-
/O.EXP.KHGX.TO.W.0013.000000T0000Z-110427T0615Z/
TRINITY TX-
110 AM CDT WED APR 27 2011
...THE TORNADO WARNING FOR TRINITY COUNTY WILL EXPIRE AT 115 AM
CDT...
THE STORM HAS MOVED OUT OF THE COUNTY.
LAT...LON 3105 9516 3116 9518 3125 9513 3133 9489
3129 9488 3126 9488 3124 9485 3116 9482
3102 9499
TIME...MOT...LOC 0611Z 274DEG 50KT 3111 9464
$$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, 11:15 PM CDT | Tornado Warning | HGX | Houston, Trinity | 45 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, 12:55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.