Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 8, NWS San Angelo, TX

April 7, 2012Sterling County, Texas

NWS San Angelo, TX issued this tornado warning at Apr 7, 2012, 5:15 PM CDT for Sterling County, Texas. It was in force for 30 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 7, 2012, 5:15 PM CDT (22:15 UTC)
Expired: Apr 7, 2012, 5:45 PM CDT
In force: 30 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon

County Sterling County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 7, 5:25 PM CDT	HAIL 1	20 S Westbrook, TX	3/4 TO 1 INCH HAIL NEAR MITCHELL/HOWARD COUNTY LINE, RELAYED TO MAF FROM SJT VIA NWS CHAT

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 7, 3:01 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 10.3 hours before the alert went out and 110 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: 993 J/kg
Mixed-layer CIN: -242 J/kg
Mixed-layer LCL: 1189 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

377 
WFUS54 KSJT 072215
TORSJT
TXC431-072245-
/O.NEW.KSJT.TO.W.0008.120407T2215Z-120407T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
515 PM CDT SAT APR 7 2012

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN STERLING COUNTY IN WEST CENTRAL TEXAS...

* UNTIL 545 PM CDT

* AT 511 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS OVER NORTH CENTRAL STERLING COUNTY...OR 14 MILES NORTH
  OF STERLING CITY...MOVING SOUTH AT 10 MPH. LAW ENFORCEMENT HAS 
  REPORTED A FUNNEL CLOUD 15 MILES NORTH OF STERLING CITY. 

  IN ADDITION TO DANGEROUS TORNADIC WINDS...OTHER HAZARDS INCLUDE...
  LARGE DAMAGING HAIL UP TO GOLF BALL SIZE.
  DAMAGING STRAIGHT LINE WINDS IN EXCESS OF 60 MPH.
  POTENTIALLY DEADLY LIGHTNING.

*THE TORNADO WILL REMAIN OVER MAINLY RURAL AREAS OF...
  NORTHERN STERLING COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SATURDAY EVENING FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3210 10112 3210 10095 3209 10094 3187 10090
      3187 10118
TIME...MOT...LOC 2214Z 359DEG 7KT 3203 10105

$$
DANIELS

1 follow-up statement

416 
WWUS54 KSJT 072233
SVSSJT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
533 PM CDT SAT APR 7 2012

TXC431-072245-
/O.CON.KSJT.TO.W.0008.000000T0000Z-120407T2245Z/
STERLING TX-
533 PM CDT SAT APR 7 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR NORTHERN
STERLING COUNTY...

AT 530 PM CDT... STRONG ROTATION CONTINUES WITH THIS STORM. A TORNADO
MAY DEVELOP AT ANY TIME! THE BEST ROTATION WAS LOCATED OVER NORTH 
CENTRAL STERLING COUNTY...OR 12 MILES NORTH OF STERLING CITY...
MOVING SOUTH AT 10 MPH.

  STORM HAZARDS INCLUDE...
  DANGEROUS TORNADIC WINDS.
  LARGE DAMAGING HAIL UP TO TENNIS BALL SIZE. HAIL
  DAMAGING WINDS IN EXCESS OF 60 MPH.

  WITH POSSIBLE STORM IMPACTS...
  OVERTURNED VEHICLES...
  DAMAGE TO TREES...SOME MAY BE UPROOTED...
  DAMAGE TO HOMES...MAY DESTROY MANUFACTURED HOMES...
  DENTED VEHICLES...
  MODERATE ROOF DAMAGE...
  MAY BREAK WINDOWS ON VEHICLES AND HOMES
  MAY INJURE PEOPLE...PETS...AND LIVESTOCK LEFT UNPROTECTED...
  DAMAGE TO TREE LIMBS...
  LIGHT OBJECTS BLOWN AROUND...

THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF NORTHERN
STERLING COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SATURDAY EVENING FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3208 10112 3207 10095 3209 10094 3187 10090
      3187 10118
TIME...MOT...LOC 2232Z 359DEG 7KT 3199 10105

$$
DANIELS

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 2:48 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	42 min
Apr 7, 3:25 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	50 min
Apr 7, 3:58 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	47 min
Apr 7, 4:06 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	39 min
Apr 7, 4:30 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Sterling	45 min
Apr 7, 4:35 PM CDT	Special Weather Statement	SJT	Jones	40 min
Apr 7, 4:42 PM CDT	Tornado Warning	SJT	Sterling	33 min
Apr 7, 4:46 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	44 min
Apr 7, 5:11 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	49 min
Apr 7, 5:29 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	46 min
Apr 7, 5:58 PM CDT	Tornado Warning	SJT	Sterling	32 min
Apr 7, 6:00 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	45 min
Apr 7, 6:03 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	42 min
Apr 7, 6:17 PM CDT	Severe Thunderstorm Warning	SJT	Jones, Nolan, Taylor	43 min
Apr 7, 6:33 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	42 min
Apr 7, 6:50 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Taylor	40 min
Apr 7, 6:54 PM CDT	Areal Flood Advisory	SJT	Taylor	111 min

Nearby

Tornado Warnings in Texas, 2012 Every tornado warning in 2012 Tornadoes 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.