Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 60, NWS San Angelo, TX

April 18, 2013Coke County, Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 18, 2013, 2:09 AM CDT for Coke County, Tom Green County, Texas. It was in force for 51 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
Apr 18, 2013, 2:09 AM CDT (07:09 UTC)
Expired
Apr 18, 2013, 3:00 AM CDT
In force
51 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon

Counties Coke 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 07:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 17, 10:47 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 7.2 hours before the alert went out and 255 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, Del Rio, TX at 00:00Z on 2013-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2571 joules per kilogram.LCLLFCEL10008507005003002001001 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, Del Rio, TX at 00:00Z on 2013-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939587897Sfc1 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
2571 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1531 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
383 m²/s²
Significant tornado parameter
2.6
Supercell composite
20.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 7:45 PM CDTSpecial Weather StatementSJTHaskell45 min
Apr 18, 12:18 AM CDTSpecial Weather StatementSJTFisher27 min
Apr 18, 12:19 AM CDTSpecial Weather StatementSJTSterling26 min
Apr 18, 12:43 AM CDTSpecial Weather StatementSJTNolan32 min
Apr 18, 12:49 AM CDTSevere Thunderstorm WarningSJTFisher, Haskell, Jones41 min
Apr 18, 1:15 AM CDTSpecial Weather StatementSJTNolan30 min
Apr 18, 1:20 AM CDTSpecial Weather StatementSJTHaskell, Jones, Throckmorton25 min
Apr 18, 1:28 AM CDTSevere Thunderstorm WarningSJTNolan, Taylor47 min
Apr 18, 1:46 AM CDTSpecial Weather StatementSJTIrion29 min
Apr 18, 1:48 AM CDTSpecial Weather StatementSJTShackelford, Throckmorton42 min
Apr 18, 2:02 AM CDTSpecial Weather StatementSJTCallahan, Taylor43 min
Apr 18, 2:17 AM CDTSpecial Weather StatementSJTCrockett58 min
Apr 18, 2:46 AM CDTSpecial Weather StatementSJTCallahan, Coleman44 min
Apr 18, 2:49 AM CDTSpecial Weather StatementSJTConcho41 min
Apr 18, 3:07 AM CDTSpecial Weather StatementSJTSchleicher, Sutton38 min
Apr 18, 3:18 AM CDTSpecial Weather StatementSJTBrown, Coleman42 min
Apr 18, 4:00 AM CDTSpecial Weather StatementSJTBrown60 min
Apr 18, 4:03 AM CDTSevere Thunderstorm WarningSJTBrown42 min
Apr 18, 4:23 AM CDTSpecial Weather StatementSJTMcCulloch67 min
Apr 18, 1:31 PM CDTFrost AdvisorySJTBrown, Callahan, Coke, Coleman, Concho, Crockett and 18 more19 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2013Every severe thunderstorm warning 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.