Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Shreveport, LA

January 25, 20126 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 25, 2012, 10:33 AM CST for 6 counties in Texas. It was in force for 57 min. 2 reports 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: Jan 25, 2012, 10:33 AM CST (16:33 UTC)
Expired: Jan 25, 2012, 11:30 AM CST
In force: 57 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Gregg County, TX, Harrison County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 59 km from the middle of the area, began a volume at 16:34 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
Jan 25, 10:40 AM CST	TSTM WND DMG	Mount Enterprise, TX	REPORT OF ROOF BLOWN OFF HOUSE AND BLOCKING PARTS OF HIGHWAY 259.
Jan 25, 10:56 AM CST	TORNADO	5 Wnw Gary City, TX	AN EF0 TORNADO TOUCHED DOWN 11 MILES NORTHEAST OF MT ENTERPRISE TX ALONG HWY 315 AND MOVED EAST NORTHEAST CROSSING CR 164 AND CR 163. SEVERAL TREES WERE SNAPPED AND UPROOTED ALONG THE PATH. THE TORNADO LIFTED BEFORE REACHING CR 160 IN PANOLA COUNTY. THE TORNAD

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
Jan 25, 7:56 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 4.6 hours before the alert went out and 67 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: 3 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 314 m²/s²
0-3 km storm-relative helicity: 484 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

009 
WUUS54 KSHV 251633
SVRSHV
TXC183-203-347-365-401-419-251730-
/O.NEW.KSHV.SV.W.0009.120125T1633Z-120125T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1033 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL NACOGDOCHES COUNTY IN EASTERN TEXAS...
  THIS INCLUDES THE CITY OF NACOGDOCHES...
  SHELBY COUNTY IN EASTERN TEXAS...
  THIS INCLUDES THE CITY OF CENTER...
  SOUTHERN GREGG COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF KILGORE...
  SOUTHERN HARRISON COUNTY IN NORTHEAST TEXAS...
  PANOLA COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF CARTHAGE...
  EASTERN RUSK COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF HENDERSON...

* UNTIL 1130 AM CST

* AT 1029 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM KILGORE TO 6 MILES NORTH OF NACOGDOCHES...AND MOVING EAST AT
  50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MINDEN...PINEHILL...GARRISON...TATUM...TIMPSON...BECKVILLE...
  TENAHA...WASKOM...SHELBYVILLE...JOAQUIN...ELYSIAN FIELDS AND
  DEBERRY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3161 9465 3245 9491 3258 9408 3242 9404
      3202 9405 3193 9398 3191 9393 3189 9392
      3189 9390 3173 9386
TIME...MOT...LOC 1632Z 257DEG 29KT 3236 9483 3170 9463

$$

03

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 25, 9:41 AM CST	Flash Flood Watch	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	11 hr
Jan 25, 9:41 AM CST	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	49 min
Jan 25, 9:59 AM CST	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, San Augustine	46 min
Jan 25, 10:06 AM CST	Areal Flood Advisory	SHV	Cherokee, Franklin, Red River, Smith, Titus	82 days
Jan 25, 10:35 AM CST	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	5 days
Jan 25, 10:35 AM CST	River Flood Warning	SHV	Bowie, Cass, Morris	9 days
Jan 25, 10:36 AM CST	River Flood Warning	SHV	Franklin, Morris, Titus	5 days
Jan 25, 10:38 AM CST	River Flood Warning	SHV	Smith, Wood	6 days
Jan 25, 10:49 AM CST	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	56 min
Jan 25, 10:55 AM CST	Tornado Warning	SHV	Harrison, Panola	32 min
Jan 25, 11:32 AM CST	Severe Thunderstorm Warning	SHV	Harrison, Marion, Panola, Shelby	58 min
Jan 25, 1:17 PM CST	Tornado Warning	SHV	Sabine	28 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.