Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 86, NWS San Angelo, TX

May 20, 2020Irion County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 20, 2020, 7:30 PM CDT for Irion County, Texas. It was in force for 45 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, 2020, 7:30 PM CDT (00:30 UTC)
Expired: May 20, 2020, 8:15 PM CDT
In force: 45 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Irion County, TX

The radar

The San Angelo radar (KSJT), 47 km from the middle of the area, began a volume at 00:31 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, 3:47 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.5 hours before the alert went out and 136 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: 152 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 3871 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 6:11 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, May 20, 6:11 PM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, May 20, 2:50 PM CDT, 4 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service San Angelo TX
250 PM CDT Wed May 20 2020

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-212000-
Fisher-Nolan-Sterling-Coke-Runnels-Irion-Tom Green-Concho-
Crockett-Schleicher-Sutton-Haskell-Throckmorton-Jones-Shackelford-
Taylor-Callahan-Coleman-Brown-McCulloch-San Saba-Menard-Kimble-
Mason-
250 PM CDT Wed May 20 2020

This Hazardous Weather Outlook is for portions of west central
Texas.

.DAY ONE...This Afternoon and Tonight

Thunderstorms are expected to develop and move into West Central
Texas late this afternoon and evening. Some storms may be severe
The main weather hazards will be damaging winds, large hail and
dangerous lightning. In addition, some of the storms will be
capable of producing heavy rainfall, which may lead to localized
flash flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Scattered thunderstorms will be possible late Thursday afternoon
into Thursday night. Additional thunderstorms will be possible
into the Memorial Day holiday weekend, across various parts of
West Central Texas. Some strong to severe storms will be possible
with strong winds, hail and lightning the main threats. The risk
of severe storms will need to be monitored.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening. Please relay any
information about observed weather to the NWS while following all
local, state and CDC guidelines.

In the hours before

Special weather statement, May 20, 3:43 PM CDT, 3 hours 47 minutes before

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Local storm report, May 20, 4:40 PM CDT, 2 hours 50 minutes before

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Special weather statement, May 20, 6:52 PM CDT, 38 minutes before

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Special weather statement, May 20, 7:00 PM CDT, 30 minutes before

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Local storm report, May 20, 7:08 PM CDT, 22 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, 7:00 PM CDT	Special Weather Statement	SJT	Crockett	45 min
May 20, 7:11 PM CDT	Areal Flood Advisory	SJT	Tom Green	3 hr
May 20, 7:40 PM CDT	Special Weather Statement	SJT	Stonewall	35 min
May 20, 7:52 PM CDT	Special Weather Statement	SJT	Schleicher	38 min
May 20, 8:01 PM CDT	Areal Flood Advisory	SJT	Irion	3 hr
May 20, 8:37 PM CDT	Special Weather Statement	SJT	Concho, Schleicher	53 min
May 20, 8:49 PM CDT	Areal Flood Advisory	SJT	Schleicher, Tom Green	3 hr
May 20, 9:00 PM CDT	Special Weather Statement	SJT	Haskell	60 min
May 20, 9:08 PM CDT	Special Weather Statement	SJT	Tom Green	52 min
May 20, 9:17 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	43 min
May 20, 9:44 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford, Throckmorton	61 min
May 20, 9:56 PM CDT	Special Weather Statement	SJT	Concho, Menard, Runnels	49 min
May 20, 10:45 PM CDT	Special Weather Statement	SJT	Throckmorton	45 min
May 20, 10:53 PM CDT	Special Weather Statement	SJT	Mason	52 min
May 20, 11:43 PM CDT	Special Weather Statement	SJT	Shackelford, Throckmorton	62 min
May 20, 11:50 PM CDT	Special Weather Statement	SJT	San Saba	55 min
May 21, 6:38 PM CDT	Special Weather Statement	SJT	Fisher	52 min
May 21, 6:56 PM CDT	Special Weather Statement	SJT	Tom Green	49 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.