Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 24, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Nov 8, 2011, 6:43 PM CST for Chambers County, Galveston County, Texas. It was in force for 62 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
- Nov 8, 2011, 6:43 PM CST (00:43 UTC)
- Expired
- Nov 8, 2011, 7:45 PM CST
- In force
- 62 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Chambers County, TX, Galveston County, TX
The radar
The Houston radar (KHGX), 50 km from the middle of the area, began a volume at 00:45 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 |
|---|---|---|---|
| Nov 8, 1:59 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.7 hours before the alert went out and 146 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
- 2040 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.4
The text
As transmitted, in the capitals the NWS used until 2016.
845
WFUS54 KHGX 090043
TORHGX
TXC071-167-090145-
/O.NEW.KHGX.TO.W.0024.111109T0043Z-111109T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
643 PM CST TUE NOV 8 2011
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN CHAMBERS COUNTY IN SOUTHEAST TEXAS...
NORTHEASTERN GALVESTON COUNTY IN SOUTHEAST TEXAS...
* UNTIL 745 PM CST
* AT 640 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS LOCATED NEAR SMITH POINT...MOVING EAST AT 25 MPH.
* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
ROLLOVER PASS...OAK ISLAND...HIGH ISLAND...GILCHRIST...WINNIE AND
STOWELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE DURING A TORNADO IS IN THE INTERIOR HALLWAY OR
A ROOM SUCH AS A CLOSET ON THE LOWEST LEVEL OF A STURDY BUILDING. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF YOU ARE INSIDE A MOBILE HOME OR VEHICLE...EVACUATE THEM
IMMEDIATELY AND SEEK SHELTER INSIDE A STURDY BUILDING. AS A LAST
RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR
HEAD WITH YOUR HANDS.
&&
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 2954 9438 2951 9447 2947 9466 2954 9458
2953 9451 2954 9453 2957 9455 2953 9474
2953 9479 2956 9480 2959 9474 2966 9471
2984 9436 2956 9436
TIME...MOT...LOC 0043Z 252DEG 21KT 2953 9473
$$2 follow-up statements
138
WWUS54 KHGX 090120
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
720 PM CST TUE NOV 8 2011
TXC071-167-090145-
/O.CON.KHGX.TO.W.0024.000000T0000Z-111109T0145Z/
CHAMBERS TX-GALVESTON TX-
720 PM CST TUE NOV 8 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CST FOR
NORTHEAST GALVESTON AND SOUTHEAST CHAMBERS COUNTIES...
AT 714 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM. THIS THUNDERSTORM WAS LOCATED 6
MILES NORTHWEST OF ROLLOVER PASS...OR 23 MILES EAST OF SAN
LEON...MOVING EAST AT 25 MPH. THE THUNDERSTORM HAS WEAKENED SOMEWHAT
ON RADAR BUT STILL MAY BE CAPABLE OF PRODUCING A TORNADO OR DAMAGING
STRAIGHT-LINE WINDS.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GILCHRIST...HIGH ISLAND...WINNIE AND STOWELL
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE DURING A TORNADO IS IN THE INTERIOR HALLWAY OR
A ROOM SUCH AS A CLOSET ON THE LOWEST LEVEL OF A STURDY BUILDING. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF YOU ARE INSIDE A MOBILE HOME OR VEHICLE...EVACUATE THEM
IMMEDIATELY AND SEEK SHELTER INSIDE A STURDY BUILDING. AS A LAST
RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR
HEAD WITH YOUR HANDS.
&&
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 2954 9438 2951 9447 2947 9466 2954 9458
2953 9451 2954 9453 2957 9455 2955 9465
2956 9466 2958 9466 2961 9466 2965 9463
2984 9436 2956 9436
TIME...MOT...LOC 0119Z 252DEG 21KT 2958 9453
$$370
WWUS54 KHGX 090152
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
752 PM CST TUE NOV 8 2011
TXC071-167-090156-
/O.EXP.KHGX.TO.W.0024.000000T0000Z-111109T0145Z/
CHAMBERS TX-GALVESTON TX-
752 PM CST TUE NOV 8 2011
...THE TORNADO WARNING FOR NORTHEAST GALVESTON AND SOUTHEAST
CHAMBERS COUNTIES HAS EXPIRED...
THE STORM THAT PROMPTED THE WARNING HAS WEAKED OR MOVED OUT OF THE
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 2954 9438 2951 9447 2947 9466 2954 9458
2953 9451 2954 9453 2957 9455 2955 9465
2956 9466 2958 9466 2961 9466 2965 9463
2984 9436 2956 9436
TIME...MOT...LOC 0120Z 252DEG 21KT 2958 9452
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 8, 6:30 PM CST | Special Weather Statement | HGX | Chambers | 60 min |
| Nov 8, 6:53 PM CST | Special Marine Warning | HGX | 67 min | |
| Nov 9, 10:17 AM CST | Wind Advisory | HGX | Brazoria, Chambers, Galveston, Jackson, Matagorda | 8 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.