Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 209, NWS San Angelo, TX

August 5, 2017Shackelford County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Aug 5, 2017, 7:46 PM CDT for Shackelford 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: Aug 5, 2017, 7:46 PM CDT (00:46 UTC)
Expired: Aug 5, 2017, 8:30 PM CDT
In force: 44 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Shackelford County, TX

The radar

The Dyess AFB radar (KDYX), 24 km from the middle of the area, began a volume at 00:46 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

Norman, OK (KOUN), launched 00:00Z, 0.8 hours before the alert went out and 330 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: 415 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 2366 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 5, 6:52 PM CDT, 54 minutes earlier.

Area forecast discussion, Aug 5, 6:52 PM CDT, 54 minutes before

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Hazardous weather outlook, Aug 5, 2:32 PM CDT, 5 hours 14 minutes before

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In the hours before

Special weather statement, Aug 5, 6:00 PM CDT, 1 hour 46 minutes before

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Special weather statement, Aug 5, 7:35 PM CDT, 11 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
Aug 5, 7:00 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	45 min
Aug 5, 7:35 PM CDT	Special Weather Statement	SJT	Shackelford	40 min
Aug 5, 8:15 PM CDT	Areal Flood Advisory	SJT	Shackelford	2 hr
Aug 6, 3:33 PM CDT	Special Weather Statement	SJT	Taylor	42 min
Aug 6, 3:36 PM CDT	Special Weather Statement	SJT	Tom Green	39 min
Aug 6, 4:07 PM CDT	Special Weather Statement	SJT	Tom Green	38 min
Aug 6, 4:13 PM CDT	Special Weather Statement	SJT	Jones	32 min
Aug 6, 4:42 PM CDT	Special Weather Statement	SJT	Runnels	33 min
Aug 6, 5:08 PM CDT	Special Weather Statement	SJT	Throckmorton	37 min
Aug 6, 5:14 PM CDT	Special Weather Statement	SJT	Coleman	61 min
Aug 6, 5:17 PM CDT	Special Weather Statement	SJT	Irion	58 min
Aug 6, 5:25 PM CDT	Special Weather Statement	SJT	Fisher	35 min
Aug 6, 5:47 PM CDT	Special Weather Statement	SJT	Concho	58 min
Aug 6, 5:49 PM CDT	Special Weather Statement	SJT	Haskell, Throckmorton	41 min
Aug 6, 5:54 PM CDT	Special Weather Statement	SJT	Tom Green	66 min
Aug 6, 5:58 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	32 min
Aug 6, 6:08 PM CDT	Special Weather Statement	SJT	Nolan	52 min
Aug 6, 6:11 PM CDT	Special Weather Statement	SJT	Coleman	64 min
Aug 6, 6:18 PM CDT	Special Weather Statement	SJT	Irion	57 min
Aug 6, 6:30 PM CDT	Special Weather Statement	SJT	Haskell, Jones, Shackelford, Throckmorton	45 min
Aug 6, 6:49 PM CDT	Special Weather Statement	SJT	Concho	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

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.