Alert archive / Texas / Special Weather Statements in 2013

Special Weather Statement, NWS San Angelo, TX

April 1, 2013Shackelford County, Throckmorton County, Texas

NWS San Angelo, TX issued this special weather statement at Apr 1, 2013, 9:49 PM CDT for Shackelford County, Throckmorton County, Texas. It was in force for 26 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
Apr 1, 2013, 9:49 PM CDT (02:49 UTC)
Expired
Apr 1, 2013, 10:15 PM CDT
In force
26 min
Issued by
NWS San Angelo, TX

Counties Shackelford County, TX, Throckmorton County, TX

The radar

The Dyess AFB radar (KDYX), 51 km from the middle of the area, began a volume at 02:50 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

Fort Worth, TX (KFWD), launched 00:00Z, 2.8 hours before the alert went out and 172 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, Fort Worth, TX at 00:00Z on 2013-04-02Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2013-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.19395878Sfc1 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
2618 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

366 
WWUS84 KSJT 020249
SPSSJT

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
949 PM CDT MON APR 1 2013

TXZ099-114-020315-
SHACKELFORD TX-THROCKMORTON TX-
949 PM CDT MON APR 1 2013

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1015 PM CDT FOR
SHACKELFORD AND THROCKMORTON COUNTIES...

POTENTIAL STORM HAZARDS INCLUDE...
  45 MPH WINDS AND SMALL HAIL...

AT 946 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES SOUTH OF
WOODSON...OR ABOUT 15 MILES SOUTHEAST OF THROCKMORTON...MOVING
SOUTHEAST AT 30 MPH.

POTENTIAL STORM IMPACTS INCLUDE...
  SOME BROKEN TREE BRANCHES...
  A FEW LOOSE OBJECTS TOPPLED...

THE STRONG THUNDERSTORM WILL BE NEAR...
THROCKMORTON AND SHACKELFORD COUNTIES.

LAT...LON 3337 9894 3296 9895 3295 9909 3255 9909
      3252 9911 3257 9942 3277 9953 3340 9920
      3339 9896
TIME...MOT...LOC 0249Z 305DEG 25KT 3297 9903


$$

20

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 7:37 PM CDTSpecial Weather StatementSJTHaskell53 min
Apr 1, 8:06 PM CDTSevere Thunderstorm WarningSJTHaskell54 min
Apr 1, 8:45 PM CDTSevere Thunderstorm WarningSJTHaskell, Throckmorton60 min
Apr 1, 9:05 PM CDTSpecial Weather StatementSJTShackelford55 min
Apr 2, 12:24 AM CDTSpecial Weather StatementSJTFisher36 min
Apr 2, 12:58 AM CDTSpecial Weather StatementSJTFisher32 min
Apr 2, 2:19 AM CDTSpecial Weather StatementSJTThrockmorton26 min
Apr 2, 5:49 AM CDTSpecial Weather StatementSJTShackelford26 min
Apr 2, 11:31 AM CDTSpecial Weather StatementSJTSan Saba29 min
Apr 2, 2:25 PM CDTSpecial Weather StatementSJTSan Saba35 min
Apr 2, 2:46 PM CDTSpecial Weather StatementSJTMcCulloch29 min
Apr 2, 5:00 PM CDTSpecial Weather StatementSJTCrockett30 min
Apr 2, 5:05 PM CDTSpecial Weather StatementSJTCrockett25 min
Apr 2, 5:33 PM CDTSpecial Weather StatementSJTCrockett42 min
Apr 2, 5:34 PM CDTSpecial Weather StatementSJTCrockett41 min
Apr 2, 6:13 PM CDTSpecial Weather StatementSJTIrion32 min

Nearby

Special Weather Statements in Texas, 2013Every special weather statement in 2013

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.