Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 33, NWS Amarillo, TX

May 13, 2020Collingsworth County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 13, 2020, 6:43 PM CDT for Collingsworth 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: May 13, 2020, 6:43 PM CDT (23:43 UTC)
Expired: May 13, 2020, 7:26 PM CDT
In force: 43 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Collingsworth County, TX

The radar

The Amarillo radar (KAMA), 134 km from the middle of the area, began a volume at 23:45 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 13, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.7 hours before the alert went out and 133 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: 229 J/kg
Mixed-layer CIN: -459 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 274 m²/s²
0-3 km storm-relative helicity: 368 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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 13, 6:40 PM CDT, 3 minutes earlier.

Area forecast discussion, May 13, 6:40 PM CDT, 3 minutes before

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Hazardous weather outlook, May 13, 3:10 PM CDT, 3 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
310 PM CDT Wed May 13 2020

OKZ001>003-TXZ001>020-317-140900-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
310 PM CDT Wed May 13 2020

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...This Afternoon and Tonight.

Severe storms expected to develop across the central and
southeast Panhandles today. Strong damaging winds, large hail,
and a possible tornado can't be ruled out.

Critical Fire Weather conditions expected today across the
northwest Panhandles. Winds 20 to 25 mph expected with low
relative humidity values.

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

Thunderstorms will be possible Thursday through Saturday across
portions of the Panhandles. Can't rule out severe storms.

.SPOTTER INFORMATION STATEMENT...

Spotters should relay any information about observed severe
weather to the NWS while following all local, state, and CDC
guidelines.

Area fire managers and emergency officials should be alert for
critical Fire Weather conditions Wednesday afternoon and evening.

In the hours before

Special weather statement, May 13, 3:36 PM CDT, 3 hours 7 minutes before

Special Weather Statement
National Weather Service Amarillo TX
336 PM CDT Wed May 13 2020

TXZ014-015-019-020-132130-
Gray TX-Wheeler TX-Donley TX-Collingsworth TX-
336 PM CDT Wed May 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WHEELER...
SOUTHEASTERN GRAY...NORTHWESTERN COLLINGSWORTH AND DONLEY COUNTIES
UNTIL 430 PM CDT...

At 336 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Lelia Lake, or 8 miles northeast of Clarendon, moving
northeast at 30 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Clarendon, Shamrock, Mclean, Howardwick, Hedley, Lelia Lake, Twitty,
Dozier, Lela, Greenbelt Lake and Samnorwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3480 10078 3504 10100 3540 10044 3537 10020
      3514 10012
TIME...MOT...LOC 2036Z 229DEG 28KT 3501 10076

LG

Special weather statement, May 13, 4:04 PM CDT, 2 hours 39 minutes before

Special Weather Statement
National Weather Service Amarillo TX
404 PM CDT Wed May 13 2020

TXZ009-010-014-132200-
Hemphill TX-Gray TX-Roberts TX-
404 PM CDT Wed May 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL GRAY...SOUTHEASTERN
ROBERTS AND WESTERN HEMPHILL COUNTIES UNTIL 500 PM CDT...

At 404 PM CDT, Doppler radar was tracking a strong thunderstorm over
Codman, or 7 miles southwest of Miami, moving northeast at 25 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Canadian, Miami, Codman and Lora.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
the Panhandle of Texas.

LAT...LON 3552 10075 3565 10090 3606 10051 3606 10047
      3596 10028 3580 10017
TIME...MOT...LOC 2104Z 227DEG 23KT 3564 10076

LG

Special weather statement, May 13, 4:28 PM CDT, 2 hours 15 minutes before

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Special weather statement, May 13, 6:14 PM CDT, 29 minutes before

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Special weather statement, May 13, 6:24 PM CDT, 19 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:37 PM CDT	Special Weather Statement	AMA	Deaf Smith	53 min
May 12, 9:18 PM CDT	Dense Fog Advisory	AMA	Armstrong, Carson, Collingsworth, Dallam, Donley, Gray and 12 more	12 hr
May 13, 3:36 PM CDT	Special Weather Statement	AMA	Donley	54 min
May 13, 3:52 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Gray, Wheeler	65 min
May 13, 4:04 PM CDT	Special Weather Statement	AMA	Hemphill	56 min
May 13, 4:28 PM CDT	Special Weather Statement	AMA	Lipscomb	62 min
May 13, 6:14 PM CDT	Special Weather Statement	AMA	Hemphill	46 min
May 13, 6:24 PM CDT	Special Weather Statement	AMA	Wheeler	36 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.