Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 142, NWS San Angelo, TX

June 18, 2020Coke County, Runnels County, Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Jun 18, 2020, 8:40 PM CDT for Coke County, Runnels County, Tom Green County, Texas. It was in force for 35 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: Jun 18, 2020, 8:40 PM CDT (01:40 UTC)
Expired: Jun 18, 2020, 9:15 PM CDT
In force: 35 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Coke County, TX, Runnels County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 41 km from the middle of the area, began a volume at 01:41 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 00:00Z, 1.7 hours before the alert went out and 179 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: 153 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 4177 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 7:29 PM CDT	Special Weather Statement	SJT	Taylor	46 min
Jun 18, 7:31 PM CDT	Special Weather Statement	SJT	Runnels	29 min
Jun 18, 7:44 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Runnels	31 min
Jun 18, 7:58 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Runnels, Tom Green	47 min
Jun 18, 9:15 PM CDT	Special Weather Statement	SJT	Tom Green	60 min
Jun 18, 10:12 PM CDT	Special Weather Statement	SJT	Sterling	48 min
Jun 18, 10:50 PM CDT	Special Weather Statement	SJT	Coke, Sterling	40 min

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.