Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 22, NWS Houston/Galveston, TX

November 8, 2011Liberty County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Nov 8, 2011, 4:35 PM CST for Liberty County, Texas. It was in force for 40 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: Nov 8, 2011, 4:35 PM CST (22:35 UTC)
Expired: Nov 8, 2011, 5:15 PM CST
In force: 40 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

County Liberty County, TX

The radar

The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 22:37 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
Nov 8, 4:50 PM CST	TORNADO	2 E Moss Hill, TX	POSSIBLE TORNADO ON HIGHWAY 105 EAST OF MOSS HILL. 600 POWER OUTAGES REPORTED.

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
Nov 8, 1:59 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.6 hours before the alert went out and 149 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 403 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 438 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

932 
WFUS54 KHGX 082235
TORHGX
TXC291-082315-
/O.NEW.KHGX.TO.W.0022.111108T2235Z-111108T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
435 PM CST TUE NOV 8 2011

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL LIBERTY COUNTY IN SOUTHEAST TEXAS...

* UNTIL 515 PM CST

* AT 432 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS          
  TORNADO WAS LOCATED 5 MILES SOUTHWEST OF MOSS HILL...MOVING        
  NORTHEAST AT 30 MPH.

* THE TORNADO IS ON A TRACK TOWARD MOSS HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT UNTIL 8 PM 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 3014 9479 3020 9486 3037 9469 3036 9468
      3022 9464
TIME...MOT...LOC 2234Z 227DEG 26KT 3020 9476

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 8, 1:21 PM CST	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery	39 min
Nov 8, 1:22 PM CST	Tornado Warning	HGX	Harris, Liberty, Montgomery	38 min
Nov 8, 2:01 PM CST	Tornado Warning	HGX	Harris, Liberty	44 min
Nov 8, 2:43 PM CST	Tornado Warning	HGX	Liberty	47 min
Nov 8, 3:42 PM CST	Special Weather Statement	HGX	Montgomery	63 min
Nov 8, 3:43 PM CST	Special Weather Statement	HGX	Trinity	62 min
Nov 8, 4:20 PM CST	Special Weather Statement	HGX	Liberty	55 min
Nov 8, 4:29 PM CST	Tornado Warning	HGX	Liberty, Montgomery, San Jacinto	46 min
Nov 8, 4:32 PM CST	Small Craft Advisory	HGX		46 hr
Nov 8, 5:11 PM CST	Tornado Warning	HGX	Liberty, Montgomery	64 min
Nov 8, 5:26 PM CST	Special Weather Statement	HGX	Chambers	49 min
Nov 8, 5:58 PM CST	Special Marine Warning	HGX		92 min

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes 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.