Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 176, NWS Amarillo, TX

August 8, 2020Dallam County, Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 8, 2020, 8:03 PM CDT for Dallam County, Sherman County, Texas. It was in force for 57 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 8, 2020, 8:03 PM CDT (01:03 UTC)
Expired
Aug 8, 2020, 9:00 PM CDT
In force
57 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Dallam County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 126 km from the middle of the area, began a volume at 01:03 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

Dodge City, (KDDC), launched 00:00Z, 1.1 hours before the alert went out and 266 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-pSkew-T log-p diagram, Dodge City, at 00:00Z on 2020-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1256 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 00:00Z on 2020-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1256 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
2876 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

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 Aug 8, 5:54 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Aug 8, 5:54 PM CDT, 2 hours 9 minutes before
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Hazardous weather outlook, Aug 8, 2:23 PM CDT, 5 hours 40 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
223 PM CDT Sat Aug 8 2020

OKZ001>003-TXZ001>020-317-090730-
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-
223 PM CDT Sat Aug 8 2020

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

.DAY ONE...Tonight.

Thunderstorms are expected through tonight across western
portions of the Panhandles. A few storms may be strong with gusty
winds being the primary hazard.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Showers and thunderstorms are expected to continue through
Sunday and into early next week. Storms will have the potential to
be strong with gusty winds and small hail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Aug 8, 6:00 PM CDT, 2 hours 3 minutes before
Special Weather Statement
National Weather Service Amarillo TX
600 PM CDT Sat Aug 8 2020

TXZ004-005-009-010-082330-
Hemphill TX-Ochiltree TX-Roberts TX-Lipscomb TX-
600 PM CDT Sat Aug 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LIPSCOMB...NORTHERN
ROBERTS...NORTHWESTERN HEMPHILL AND SOUTHEASTERN OCHILTREE COUNTIES
UNTIL 630 PM CDT...

At 559 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Lake Meredith, or 21 miles southwest of Borger,
moving northeast at 15 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

This storm will remain over mainly rural areas of southwestern
Lipscomb, northern Roberts, northwestern Hemphill and southeastern
Ochiltree Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

If on or near Lake Meredith, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 3572 10101 3584 10109 3591 10109 3621 10054
      3598 10037
TIME...MOT...LOC 2259Z 211DEG 14KT 3554 10175

Bieda
Special weather statement, Aug 8, 6:01 PM CDT, 2 hours 2 minutes before
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Special weather statement, Aug 8, 6:23 PM CDT, 1 hour 40 minutes before
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Special weather statement, Aug 8, 7:20 PM CDT, 43 minutes before
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Special weather statement, Aug 8, 7:27 PM CDT, 36 minutes before
Special Weather Statement
National Weather Service Amarillo TX
727 PM CDT Sat Aug 8 2020

TXZ001-002-090100-
Sherman TX-Dallam TX-
727 PM CDT Sat Aug 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SHERMAN AND
SOUTHEASTERN DALLAM COUNTIES UNTIL 800 PM CDT...

At 726 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles southwest of Conlen, or 15 miles northeast of Dalhart. This
storm was nearly stationary.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Conlen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3610 10229 3621 10243 3639 10226 3623 10205
TIME...MOT...LOC 0026Z 226DEG 3KT 3620 10229

Bieda
Special weather statement, Aug 8, 7:57 PM CDT, 6 minutes before
Special Weather Statement
National Weather Service Amarillo TX
757 PM CDT Sat Aug 8 2020

TXZ001-002-090130-
Sherman TX-Dallam TX-
757 PM CDT Sat Aug 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SHERMAN AND EASTERN
DALLAM COUNTIES UNTIL 830 PM CDT...

At 757 PM CDT, Doppler radar was tracking a strong thunderstorm near
Conlen, or 11 miles west of Stratford, moving northeast at 10 mph.

Penny size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Stratford and Conlen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 3631 10191 3610 10229 3621 10243 3650 10229
      3650 10227
TIME...MOT...LOC 0057Z 210DEG 10KT 3628 10227

Bieda

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 7:20 PM CDTSpecial Weather StatementAMASherman25 min
Aug 8, 7:27 PM CDTSpecial Weather StatementAMASherman33 min
Aug 8, 7:48 PM CDTAreal Flood AdvisoryAMADallam3 hr
Aug 8, 7:57 PM CDTSpecial Weather StatementAMASherman33 min
Aug 8, 8:47 PM CDTSpecial Weather StatementAMAHartley, Oldham43 min
Aug 8, 9:00 PM CDTSpecial Weather StatementAMADallam30 min
Aug 8, 9:24 PM CDTSpecial Weather StatementAMAHartley, Oldham51 min
Aug 8, 9:26 PM CDTSpecial Weather StatementAMASherman49 min
Aug 8, 10:09 PM CDTSpecial Weather StatementAMASherman51 min
Aug 8, 11:24 PM CDTSpecial Weather StatementAMAHansford66 min
Aug 9, 3:53 PM CDTSpecial Weather StatementAMACimarron37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every 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.