Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 227, NWS San Angelo, TX

May 20, 2015Irion County, Schleicher County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 20, 2015, 4:52 PM CDT for Irion County, Schleicher County, Texas. It was in force for 53 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, 4:52 PM CDT (21:52 UTC)
Expired: May 20, 2015, 5:45 PM CDT
In force: 53 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 2.0 in
Wind: 60.0 mph

Counties Irion County, TX, Schleicher County, TX

The radar

The San Angelo radar (KSJT), 39 km from the middle of the area, began a volume at 21:53 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, 9.9 hours before the alert went out and 166 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: 1293 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 774 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 May 20, 3:50 PM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, May 20, 3:50 PM CDT, 1 hour 2 minutes before

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Hazardous weather outlook, May 20, 3:03 PM CDT, 1 hour 49 minutes before

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In the hours before

Special weather statement, May 20, 4:09 PM CDT, 43 minutes before

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Local storm report, May 20, 4:29 PM CDT, 23 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 19, 7:03 PM CDT	Tornado Warning	SJT	Callahan	27 min
May 20, 4:44 AM CDT	Special Weather Statement	SJT	Throckmorton	31 min
May 20, 5:09 AM CDT	Areal Flood Advisory	SJT	Haskell, Throckmorton	111 min
May 20, 3:58 PM CDT	Severe Thunderstorm Warning	SJT	Irion	62 min
May 20, 4:09 PM CDT	Special Weather Statement	SJT	Crockett	51 min
May 20, 5:10 PM CDT	Areal Flood Advisory	SJT	Irion, Schleicher, Tom Green	2 hr
May 20, 5:26 PM CDT	Special Weather Statement	SJT	Crockett	34 min
May 20, 5:37 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Schleicher, Tom Green	53 min
May 20, 5:53 PM CDT	Special Weather Statement	SJT	Crockett	37 min
May 20, 6:12 PM CDT	Areal Flood Advisory	SJT	Crockett	2 hr
May 20, 6:33 PM CDT	Special Weather Statement	SJT	Schleicher	27 min
May 20, 6:40 PM CDT	Areal Flood Advisory	SJT	Schleicher, Sutton	2 hr
May 20, 6:52 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	53 min
May 20, 6:54 PM CDT	Special Weather Statement	SJT	Crockett	36 min

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.