Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 199, NWS San Angelo, TX

August 31, 2020Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Aug 31, 2020, 8:02 PM CDT for Tom Green County, Texas. It was in force for 43 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 31, 2020, 8:02 PM CDT (01:02 UTC)
Expired: Aug 31, 2020, 8:45 PM CDT
In force: 43 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Tom Green County, TX

The radar

The San Angelo radar (KSJT), 5 km from the middle of the area, began a volume at 01:01 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

Fort Worth, TX (KFWD), launched 00:00Z, 1.0 hours before the alert went out and 338 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: 1092 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 2152 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.1

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 31, 7:04 PM CDT, 58 minutes earlier.

Area forecast discussion, Aug 31, 7:04 PM CDT, 58 minutes before

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Hazardous weather outlook, Aug 31, 2:05 PM CDT, 5 hours 57 minutes before

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In the hours before

Special weather statement, Aug 31, 5:21 PM CDT, 2 hours 41 minutes before

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Special weather statement, Aug 31, 5:50 PM CDT, 2 hours 12 minutes before

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Special weather statement, Aug 31, 6:01 PM CDT, 2 hours 1 minute before

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Special weather statement, Aug 31, 6:17 PM CDT, 1 hour 45 minutes before

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Special weather statement, Aug 31, 6:59 PM CDT, 1 hour 3 minutes before

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Special weather statement, Aug 31, 7:55 PM CDT, 7 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 31, 7:47 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Tom Green	28 min
Aug 31, 7:52 PM CDT	Severe Thunderstorm Warning	SJT	Irion	23 min
Aug 31, 7:55 PM CDT	Special Weather Statement	SJT	Coke	50 min
Aug 31, 8:48 PM CDT	Special Weather Statement	SJT	Tom Green	27 min
Sep 1, 2:22 PM CDT	Special Weather Statement	SJT	Throckmorton	8 min
Sep 1, 2:31 PM CDT	Special Weather Statement	SJT	Jones	44 min
Sep 1, 3:03 PM CDT	Areal Flood Advisory	SJT	Callahan, Jones, Shackelford, Taylor	3 hr
Sep 1, 3:11 PM CDT	Severe Thunderstorm Warning	SJT	Jones, Shackelford	49 min
Sep 1, 3:27 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	48 min
Sep 1, 3:36 PM CDT	Special Weather Statement	SJT	Jones	39 min
Sep 1, 4:17 PM CDT	Special Weather Statement	SJT	Shackelford	43 min
Sep 1, 4:29 PM CDT	Special Weather Statement	SJT	Coke	61 min
Sep 1, 4:48 PM CDT	Special Weather Statement	SJT	Jones	42 min
Sep 1, 4:55 PM CDT	Special Weather Statement	SJT	Brown	65 min
Sep 1, 5:04 PM CDT	Special Weather Statement	SJT	Throckmorton	56 min
Sep 1, 5:29 PM CDT	Special Weather Statement	SJT	Jones	46 min
Sep 1, 5:33 PM CDT	Special Weather Statement	SJT	Brown	42 min
Sep 1, 6:34 PM CDT	Areal Flood Advisory	SJT	Callahan, Jones, Shackelford, Taylor	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2020 Every severe thunderstorm warning in 2020

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.