Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 156, NWS San Angelo, TX

August 12, 2012Concho County, Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Aug 12, 2012, 10:49 PM CDT for Concho County, Tom Green County, Texas. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 12, 2012, 10:49 PM CDT (03:49 UTC)
Expired
Aug 12, 2012, 11:30 PM CDT
In force
41 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon

Counties Concho County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 31 km from the middle of the area, began a volume at 03:51 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 nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 3.8 hours before the alert went out and 203 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-pSkew-T log-p diagram, Midland Regional, TX at 00:00Z on 2012-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2012-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4351 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 12, 10:36 PM CDT, 13 minutes earlier.

Area forecast discussion, Aug 12, 10:36 PM CDT, 13 minutes before
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Hazardous weather outlook, Aug 12, 2:39 PM CDT, 8 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
239 PM CDT SUN AUG 12 2012

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-131945-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
239 PM CDT SUN AUG 12 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING...MAINLY NORTHEAST
OF A LINE FROM ROBERT LEE TO SAN SABA. THE MAIN THREATS ARE
DAMAGING WINDS AND DEADLY LIGHTNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

MONDAY
AFTERNOON AND EVENING...THUNDERSTORMS ARE POSSIBLE SOUTH OF
INTERSTATE 20. THE MAIN THREATS WILL BE DAMAGING WINDS AND DEADLY
LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

HUBER

In the hours before

Special weather statement, Aug 12, 9:30 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
930 PM CDT SUN AUG 12 2012

TXZ066-127-128-139-130315-
RUNNELS TX-TAYLOR TX-COLEMAN TX-CALLAHAN TX-
930 PM CDT SUN AUG 12 2012

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1015 PM CDT FOR
RUNNELS...TAYLOR...COLEMAN AND CALLAHAN COUNTIES...

AT 925 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS INDICATED BY
NATIONAL WEATHER SERVICE DOPPLER RADAR ALONG A LINE EXTENDING FROM 4
MILES EAST OF TUSCOLA TO 3 MILES SOUTH OF NORTON...OR ALONG A LINE
EXTENDING FROM 15 MILES SOUTH OF ABILENE TO 12 MILES NORTHWEST OF
BALLINGER...MOVING EAST AT 15 MPH.

* STRONG THUNDERSTORMS WILL BE NEAR...
  WINTERS BY 935 PM CDT
  LAWN BY 940 PM CDT
  BALLINGER LAKE AND WINTERS LITTLE ELM LAKE BY 950 PM CDT
  HATCHEL BY 955 PM CDT
  BALLINGER AND GOLDSBORO BY 1010 PM CDT
  CREWS AND OPLIN BY 1015 PM CDT

DIME SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON AREA ROADWAYS...
ESPECIALLY THOSE IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO
MONITOR THE SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER
ACTIONS SHOULD A WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SUNDAY EVENING FOR WEST CENTRAL TEXAS.

LAT...LON 3165 9989 3176 10023 3182 10023 3229 9978
      3216 9939
TIME...MOT...LOC 0230Z 283DEG 13KT 3222 9972 3183 10010
Special weather statement, Aug 12, 9:35 PM CDT, 1 hour 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
935 PM CDT SUN AUG 12 2012

TXZ066-073-139-140-154-155-130315-
MCCULLOCH TX-RUNNELS TX-SAN SABA TX-COLEMAN TX-BROWN TX-CONCHO TX-
935 PM CDT SUN AUG 12 2012

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1015 PM CDT FOR
MCCULLOCH...RUNNELS...SAN SABA...COLEMAN...BROWN AND CONCHO
COUNTIES...

AT 933 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS INDICATED BY
NATIONAL WEATHER SERVICE DOPPLER RADAR ALONG A LINE EXTENDING FROM 8
MILES NORTHEAST OF ZEPHYR TO 4 MILES SOUTH OF BANGS TO 11 MILES
NORTHWEST OF IVIE RESERVOIR NEAR CONCHO PARK MARINA...OR ALONG A LINE
EXTENDING FROM 12 MILES SOUTHWEST OF COMANCHE TO 9 MILES SOUTHWEST OF
BROWNWOOD TO 8 MILES SOUTHEAST OF BALLINGER...MOVING SOUTHEAST AT 10
MPH.

* STRONG THUNDERSTORMS WILL BE NEAR...
  VOSS AND ZEPHYR BY 950 PM CDT
  MOZELLE BY 1000 PM CDT
  TRICKHAM AND SHIELDS BY 1005 PM CDT
  GOULDBUSK...IVIE RESERVOIR NEAR CONCHO PARK MARINA...BROOKESMITH
  AND THE INTERSECTION OF RANCH ROAD 1929 AND RANCH ROAD 2134 BY 1015
  PM CDT

DIME SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON AREA ROADWAYS...
ESPECIALLY THOSE IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO
MONITOR THE SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER
ACTIONS SHOULD A WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SUNDAY EVENING FOR WEST CENTRAL TEXAS.

LAT...LON 3169 9868 3169 9875 3161 9877 3147 9898
      3146 9897 3147 9894 3144 9892 3145 9887
      3142 9884 3142 9872 3126 9964 3165 9991
      3172 9920 3182 9874 3171 9867
TIME...MOT...LOC 0235Z 320DEG 10KT 3174 9868 3165 9913
          3165 9985
Special weather statement, Aug 12, 9:49 PM CDT, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
949 PM CDT SUN AUG 12 2012

TXZ065-066-072-130330-
RUNNELS TX-TOM GREEN TX-COKE TX-
949 PM CDT SUN AUG 12 2012

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1030 PM CDT FOR
RUNNELS...TOM GREEN AND COKE COUNTIES...

AT 945 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS INDICATED BY
NATIONAL WEATHER SERVICE DOPPLER RADAR ALONG A LINE EXTENDING FROM 4
MILES EAST OF TENNYSON TO 9 MILES SOUTHWEST OF GRAPE CREEK...OR ALONG
A LINE EXTENDING FROM 16 MILES WEST OF BALLINGER TO 14 MILES WEST OF
SAN ANGELO...MOVING EAST AT 15 MPH.

* STRONG THUNDERSTORMS WILL BE NEAR...
  ORIENT BY 1000 PM CDT
  HARRIET...MILES...SAN ANGELO AND ROWENA BY 1030 PM CDT

PEA SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON AREA ROADWAYS...
ESPECIALLY THOSE IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO
MONITOR THE SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER
ACTIONS SHOULD A WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SUNDAY EVENING FOR WEST CENTRAL TEXAS.

LAT...LON 3150 10069 3152 10070 3153 10077 3178 10027
      3165 9989 3158 10004 3158 10011 3154 10011
      3138 10044
TIME...MOT...LOC 0249Z 288DEG 11KT 3176 10021 3151 10067
Local storm report, Aug 12, 9:56 PM CDT, 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
956 PM CDT SUN AUG 12 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0932 PM     TSTM WND DMG     WINTERS                 31.97N  99.93W
08/12/2012                   RUNNELS            TX   TRAINED SPOTTER

            TREE LIMBS DOWN IN AN ESTIMATED 60 MPH WIND.

&&

EVENT NUMBER SJT1200234

REIMER
Local storm report, Aug 12, 10:24 PM CDT, 25 minutes before
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Local storm report, Aug 12, 10:48 PM CDT, 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 7:13 PM CDTSpecial Weather StatementSJTCallahan32 min
Aug 12, 7:52 PM CDTSpecial Weather StatementSJTColeman23 min
Aug 12, 8:02 PM CDTSpecial Weather StatementSJTCoke, Nolan, Sterling58 min
Aug 12, 8:43 PM CDTSpecial Weather StatementSJTBrown, Coleman47 min
Aug 12, 8:55 PM CDTSevere Thunderstorm WarningSJTBrown, Coleman35 min
Aug 12, 9:30 PM CDTSpecial Weather StatementSJTRunnels45 min
Aug 12, 9:35 PM CDTSpecial Weather StatementSJTBrown40 min
Aug 12, 9:49 PM CDTSpecial Weather StatementSJTTom Green41 min
Aug 12, 10:05 PM CDTSevere Thunderstorm WarningSJTColeman, Concho, Runnels, Tom Green40 min
Aug 13, 12:27 AM CDTSpecial Weather StatementSJTKimble, Mason93 min
Aug 13, 1:05 AM CDTSpecial Weather StatementSJTJones55 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.