Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 146, NWS Amarillo, TX

July 14, 2020Dallam County, Sherman County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 14, 2020, 5:35 PM CDT for Dallam County, Sherman County, Texas; Cimarron County, Oklahoma. It was in force for 59 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
Jul 14, 2020, 5:35 PM CDT (22:35 UTC)
Expired
Jul 14, 2020, 6:34 PM CDT
In force
59 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cimarron County, OK, Dallam County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 145 km from the middle of the area, began a volume at 22:37 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.

IssuedProductOfficeLasted
Jul 14, 3:26 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.6 hours before the alert went out and 390 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, Denver, CO at 12:00Z on 2020-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 52 joules per kilogram.LCLLFCEL10008507005003002001001 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, Denver, CO at 12:00Z on 2020-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.19395878Sfc1 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
52 J/kg
Mixed-layer CIN
-309 J/kg
Mixed-layer LCL
2723 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
-4 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 Jul 14, 3:01 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jul 14, 3:01 PM CDT, 2 hours 34 minutes before
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Hazardous weather outlook, Jul 14, 3:26 PM CDT, 2 hours 9 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
326 PM CDT Tue Jul 14 2020

OKZ001>003-TXZ001>020-317-152030-
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-
326 PM CDT Tue Jul 14 2020

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.Day One...Tonight.

Dangerous heat will continue this evening through sunset,
especially in the Palo Duro Canyon. Thunderstorms are possible
across the Panhandles this evening. Severe storms are possible
with damaging wind gusts the main threat across the southern
Panhandles. Both damaging wind and large hail will be possible in
the northern combined Panhandles.

.Days Two through Seven...Wednesday through Monday.

Isolated to scattered thunderstorms will be possible across much
of the area on Wednesday mainly in the late afternoon and evening
hours. Some storms may become strong to severe. Damaging winds
and isolated large hail will be possible.

Thursday night and each night there after through Sunday night,
there will be a slight chance for thunderstorms mainly in the far
northwest combined Panhandles. Some storms may become strong to
severe with strong winds being the primary threat. Isolated to scattered thunderstorms will be possible during the
late afternoon and early evening Sunday through Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jul 14, 5:09 PM CDT, 26 minutes before
Special Weather Statement
National Weather Service Amarillo TX
509 PM CDT Tue Jul 14 2020

OKZ001-TXZ001-142245-
Cimarron OK-Dallam TX-
509 PM CDT Tue Jul 14 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN CIMARRON AND DALLAM
COUNTIES UNTIL 545 PM CDT...

At 508 PM CDT, Doppler radar was tracking a strong thunderstorm 12
miles south of Felt, or 25 miles east of Clayton, moving east at 35
mph.

Up to nickel size hail and wind gusts of up to 55 mph will be
possible with this storm.

Locations impacted include...
Texline, Felt and Conlen.

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 3650 10304 3650 10300 3664 10300 3674 10217
      3612 10216 3632 10304
TIME...MOT...LOC 2208Z 269DEG 30KT 3639 10273

Ferguson

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 7:10 PM CDTSevere Thunderstorm WarningAMADallam, Sherman54 min
Jul 13, 7:40 PM CDTSpecial Weather StatementAMAMoore35 min
Jul 13, 8:19 PM CDTSpecial Weather StatementAMACarson41 min
Jul 13, 8:23 PM CDTSpecial Weather StatementAMACarson37 min
Jul 13, 8:53 PM CDTSpecial Weather StatementAMAHansford37 min
Jul 14, 3:42 AM CDTExcessive Heat WarningAMARandall16 hr
Jul 14, 3:42 AM CDTHeat AdvisoryAMAArmstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 9 more16 hr
Jul 14, 5:09 PM CDTSpecial Weather StatementAMADallam36 min
Jul 14, 6:26 PM CDTSpecial Weather StatementAMADallam34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Severe Thunderstorm Warnings in Oklahoma, 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.