Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 56, NWS San Angelo, TX

April 18, 2015Mason County, Menard County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 18, 2015, 6:13 PM CDT for Mason County, Menard County, Texas. It was in force for 47 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, 2015, 6:13 PM CDT (23:13 UTC)
Expired: Apr 18, 2015, 7:00 PM CDT
In force: 47 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Mason County, TX, Menard County, TX

The radar

The San Angelo radar (KSJT), 112 km from the middle of the area, began a volume at 23:17 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
Apr 18, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 11.2 hours before the alert went out and 204 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: 668 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.4

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 Apr 18, 6:05 PM CDT, 8 minutes earlier.

Area forecast discussion, Apr 18, 6:05 PM CDT, 8 minutes before

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Hazardous weather outlook, Apr 18, 3:53 PM CDT, 2 hours 20 minutes before

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In the hours before

Special weather statement, Apr 18, 4:58 PM CDT, 1 hour 15 minutes before

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Special weather statement, Apr 18, 5:04 PM CDT, 1 hour 9 minutes before

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Local storm report, Apr 18, 5:23 PM CDT, 50 minutes before

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Special weather statement, Apr 18, 5:32 PM CDT, 41 minutes before

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Special weather statement, Apr 18, 5:34 PM CDT, 39 minutes before

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Local storm report, Apr 18, 5:55 PM CDT, 18 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
Apr 18, 2:00 PM CDT	Special Weather Statement	SJT	Tom Green	30 min
Apr 18, 2:06 PM CDT	Special Weather Statement	SJT	Schleicher	24 min
Apr 18, 2:20 PM CDT	Special Weather Statement	SJT	Shackelford	25 min
Apr 18, 2:24 PM CDT	Special Weather Statement	SJT	Runnels	36 min
Apr 18, 2:28 PM CDT	Special Weather Statement	SJT	Schleicher	32 min
Apr 18, 2:32 PM CDT	Special Weather Statement	SJT	McCulloch	28 min
Apr 18, 2:37 PM CDT	Special Weather Statement	SJT	Tom Green	23 min
Apr 18, 2:40 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	50 min
Apr 18, 2:46 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	44 min
Apr 18, 2:48 PM CDT	Special Weather Statement	SJT	Menard	27 min
Apr 18, 2:56 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Tom Green	49 min
Apr 18, 2:57 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, McCulloch, Mason, Menard	48 min
Apr 18, 2:58 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	20 min
Apr 18, 3:08 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Menard, Schleicher, Tom Green	52 min
Apr 18, 3:12 PM CDT	Severe Thunderstorm Warning	SJT	Concho, McCulloch, Menard	48 min
Apr 18, 3:23 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	28 min
Apr 18, 3:38 PM CDT	Tornado Warning	SJT	Kimble, Mason, Menard	27 min
Apr 18, 3:40 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Concho, McCulloch	50 min
Apr 18, 3:54 PM CDT	Special Weather Statement	SJT	Jones	36 min
Apr 18, 3:59 PM CDT	Areal Flood Advisory	SJT	Concho, McCulloch, Menard	91 min
Apr 18, 4:02 PM CDT	Severe Thunderstorm Warning	SJT	Concho, McCulloch, Menard	28 min
Apr 18, 4:15 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman, McCulloch	45 min
Apr 18, 4:27 PM CDT	Special Weather Statement	SJT	Jones	33 min
Apr 18, 4:30 PM CDT	Areal Flood Advisory	SJT	Coleman, Concho, McCulloch	90 min
Apr 18, 4:31 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Kimble, McCulloch, Mason, Menard, San Saba	44 min
Apr 18, 4:37 PM CDT	Special Weather Statement	SJT	Sutton	38 min
Apr 18, 4:42 PM CDT	Special Weather Statement	SJT	Shackelford	33 min
Apr 18, 4:52 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Jones, Shackelford	38 min
Apr 18, 4:56 PM CDT	Areal Flood Advisory	SJT	Brown, Coleman, McCulloch, San Saba	94 min
Apr 18, 4:58 PM CDT	Special Weather Statement	SJT	Taylor	32 min
Apr 18, 5:04 PM CDT	Special Weather Statement	SJT	Brown	26 min
Apr 18, 5:13 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	47 min
Apr 18, 5:32 PM CDT	Special Weather Statement	SJT	Shackelford	28 min
Apr 18, 5:34 PM CDT	Special Weather Statement	SJT	Menard	26 min
Apr 18, 5:45 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, Menard, Sutton	45 min
Apr 18, 6:29 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, McCulloch, Mason, Menard	46 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.