Alert archive / Texas / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 281, NWS San Angelo, TX

September 18, 2016Schleicher County, Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Sep 18, 2016, 5:46 PM CDT for Schleicher County, Tom Green County, Texas. It was in force for 44 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: Sep 18, 2016, 5:46 PM CDT (22:46 UTC)
Expired: Sep 18, 2016, 6:30 PM CDT
In force: 44 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Schleicher County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 25 km from the middle of the area, began a volume at 22:46 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 12:00Z, 10.8 hours before the alert went out and 184 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: 1191 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1177 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 Sep 18, 3:37 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Sep 18, 3:37 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Sep 18, 3:44 PM CDT, 2 hours 2 minutes before

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In the hours before

Special weather statement, Sep 18, 5:01 PM CDT, 45 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:01 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	44 min
Sep 17, 7:43 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Sterling, Tom Green	47 min
Sep 17, 8:27 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Sterling, Tom Green	48 min
Sep 17, 9:16 PM CDT	Special Weather Statement	SJT	Sterling	29 min
Sep 17, 11:24 PM CDT	Special Weather Statement	SJT	Tom Green	36 min
Sep 17, 11:45 PM CDT	Special Weather Statement	SJT	Irion	30 min
Sep 17, 11:50 PM CDT	Special Weather Statement	SJT	Tom Green	40 min
Sep 17, 11:55 PM CDT	Areal Flood Advisory	SJT	Irion, Tom Green	2 hr
Sep 18, 12:15 AM CDT	Special Weather Statement	SJT	Irion, Tom Green	45 min
Sep 18, 12:47 AM CDT	Special Weather Statement	SJT	Upton	43 min
Sep 18, 12:55 AM CDT	Areal Flood Advisory	SJT	Irion, Tom Green	3 hr
Sep 18, 5:01 PM CDT	Special Weather Statement	SJT	Tom Green	44 min
Sep 18, 6:04 PM CDT	Special Weather Statement	SJT	Schleicher	41 min
Sep 18, 6:21 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher, Tom Green	39 min
Sep 18, 6:39 PM CDT	Areal Flood Advisory	SJT	Schleicher, Tom Green	111 min
Sep 18, 6:57 PM CDT	Special Weather Statement	SJT	Schleicher	48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2016 Every severe thunderstorm warning in 2016

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.