Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 231, NWS San Angelo, TX

May 20, 2015Crockett County, Sutton County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 20, 2015, 8:28 PM CDT for Crockett County, Sutton 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: May 20, 2015, 8:28 PM CDT (01:28 UTC)
Expired: May 20, 2015, 9:09 PM CDT
In force: 41 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Crockett County, TX, Sutton County, TX

The radar

The San Angelo radar (KSJT), 96 km from the middle of the area, began a volume at 01:29 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.

Issued	Product	Office	Lasted
May 20, 5:29 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 1.5 hours before the alert went out and 139 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: 1721 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

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 May 20, 6:27 PM CDT, 2 hours 1 minute earlier.

Area forecast discussion, May 20, 6:27 PM CDT, 2 hours 1 minute before

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Hazardous weather outlook, May 20, 6:38 PM CDT, 1 hour 50 minutes before

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In the hours before

Local storm report, May 20, 5:15 PM CDT, 3 hours 13 minutes before

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Local storm report, May 20, 5:16 PM CDT, 3 hours 12 minutes before

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Special weather statement, May 20, 5:26 PM CDT, 3 hours 2 minutes before

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Special weather statement, May 20, 5:53 PM CDT, 2 hours 35 minutes before

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Special weather statement, May 20, 6:33 PM CDT, 1 hour 55 minutes before

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Special weather statement, May 20, 6:54 PM CDT, 1 hour 34 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
May 20, 7:05 PM CDT	Special Weather Statement	SJT	Crockett	25 min
May 20, 7:24 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher, Sutton	42 min
May 20, 7:34 PM CDT	Special Weather Statement	SJT	Crockett	41 min
May 20, 7:41 PM CDT	Special Weather Statement	SJT	Kimble	34 min
May 20, 7:50 PM CDT	Areal Flood Advisory	SJT	Crockett	115 min
May 20, 8:04 PM CDT	Special Weather Statement	SJT	Sutton	26 min
May 20, 8:12 PM CDT	Special Weather Statement	SJT	Schleicher	33 min
May 20, 8:16 PM CDT	Special Weather Statement	SJT	Sutton	29 min
May 20, 8:18 PM CDT	Areal Flood Advisory	SJT	Sutton	117 min
May 20, 8:34 PM CDT	Areal Flood Advisory	SJT	Kimble, Menard, Schleicher, Sutton	116 min
May 20, 8:34 PM CDT	Special Weather Statement	SJT	Crockett	26 min
May 20, 8:42 PM CDT	Special Weather Statement	SJT	Sutton	33 min
May 20, 8:46 PM CDT	Areal Flood Advisory	SJT	Crockett	89 min
May 20, 8:54 PM CDT	Special Weather Statement	SJT	Sutton	36 min
May 20, 9:00 PM CDT	Areal Flood Advisory	SJT	Kimble, Sutton	90 min
May 20, 9:00 PM CDT	Special Weather Statement	SJT	Mason	30 min
May 20, 9:15 PM CDT	Special Weather Statement	SJT	Sutton	30 min
May 20, 9:54 PM CDT	Special Weather Statement	SJT	Kimble	36 min
May 20, 10:02 PM CDT	Areal Flood Advisory	SJT	Kimble, Mason	88 min
May 20, 10:13 PM CDT	Special Weather Statement	SJT	Mason	32 min
May 20, 10:31 PM CDT	Areal Flood Advisory	SJT	Kimble, Sutton	89 min
May 20, 10:32 PM CDT	Special Weather Statement	SJT	San Saba	28 min
May 20, 10:39 PM CDT	Special Weather Statement	SJT	Kimble	51 min
May 20, 10:59 PM CDT	Special Weather Statement	SJT	San Saba	31 min
May 20, 11:31 PM CDT	Areal Flood Advisory	SJT	Kimble, Mason	89 min
May 21, 12:56 AM CDT	Areal Flood Advisory	SJT	Kimble	2 hr
May 21, 4:32 AM CDT	River Flood Warning	SJT	Kimble	15 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

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.