Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 86, NWS Lubbock, TX

May 20, 20204 counties in Texas

NWS Lubbock, TX issued this severe thunderstorm warning at May 20, 2020, 8:25 PM CDT for 4 counties in Texas. It was in force for 65 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, 8:25 PM CDT (01:25 UTC)
Expired: May 20, 2020, 9:30 PM CDT
In force: 65 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Castro County, TX, Hale County, TX, Lamb County, TX, Swisher County, TX

The radar

The Lubbock radar (KLBB), 75 km from the middle of the area, began a volume at 01:25 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, 1.4 hours before the alert went out and 262 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 Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 20, 6:52 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, May 20, 6:52 PM CDT, 1 hour 33 minutes before

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Hazardous weather outlook, May 20, 11:20 AM CDT, 9 hours 5 minutes before

Hazardous Weather Outlook
National Weather Service Lubbock TX
1120 AM CDT Wed May 20 2020

TXZ021>044-211630-
Parmer-Castro-Swisher-Briscoe-Hall-Childress-Bailey-Lamb-Hale-Floyd-
Motley-Cottle-Cochran-Hockley-Lubbock-Crosby-Dickens-King-Yoakum-
Terry-Lynn-Garza-Kent-Stonewall-
1120 AM CDT Wed May 20 2020

This Hazardous Weather Outlook is for the South Plains, Rolling
Plains and the far Southern Texas Panhandle.

.DAY ONE...This afternoon and tonight.

Scattered strong to severe thunderstorms will develop this afternoon
over areas on the Caprock, with activity moving into the Rolling
Plains during the evening. Thunderstorms later today will have
potential for hail to two inches in diameter, wind gusts to 70 mph,
and localized intense rain and flooding will also be possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible this weekend and into early next
week, some of which may be severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed. Please relay any
information about severe weather to the NWS while following local,
state, and CDC guidelines.

In the hours before

Local storm report, May 20, 7:16 PM CDT, 1 hour 9 minutes before

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Local storm report, May 20, 7:17 PM CDT, 1 hour 8 minutes before

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Local storm report, May 20, 7:18 PM CDT, 1 hour 7 minutes before

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Local storm report, May 20, 7:22 PM CDT, 1 hour 3 minutes before

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Local storm report, May 20, 7:33 PM CDT, 52 minutes before

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Local storm report, May 20, 8:25 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:08 PM CDT	Areal Flood Advisory	LUB	Lubbock	48 min
May 20, 7:37 PM CDT	Severe Thunderstorm Warning	LUB	Kent, Stonewall	53 min
May 20, 7:49 PM CDT	Severe Thunderstorm Warning	LUB	Floyd, Hale	56 min
May 20, 8:04 PM CDT	Severe Thunderstorm Warning	LUB	Briscoe, Swisher	56 min
May 20, 8:30 PM CDT	Severe Thunderstorm Warning	LUB	Stonewall	45 min
May 20, 9:02 PM CDT	Severe Thunderstorm Warning	LUB	Briscoe, Swisher	35 min
May 20, 10:10 PM CDT	Severe Thunderstorm Warning	LUB	Childress, Hall	65 min
May 20, 11:34 PM CDT	Special Weather Statement	LUB	Childress	26 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.