Alert archive / Texas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 119, NWS Amarillo, TX

May 20, 2019Oldham County, Potter County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 20, 2019, 12:27 PM CDT for Oldham County, Potter County, Texas. It was in force for 32 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, 2019, 12:27 PM CDT (17:27 UTC)
Expired: May 20, 2019, 12:59 PM CDT
In force: 32 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 2.0 in
Wind: 60.0 mph

Counties Oldham County, TX, Potter County, TX

The radar

The Amarillo radar (KAMA), 52 km from the middle of the area, began a volume at 17:29 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 5.5 hours before the alert went out and 53 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: 812 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 404 m²/s²
0-3 km storm-relative helicity: 461 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.5

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 20, 12:23 PM CDT, 4 minutes earlier.

Area forecast discussion, May 20, 12:23 PM CDT, 4 minutes before

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Hazardous weather outlook, May 20, 12:07 PM CDT, 20 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
1207 PM CDT Mon May 20 2019

OKZ001>003-TXZ001>020-317-210700-
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-
1207 PM CDT Mon May 20 2019

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

.DAY ONE...This Afternoon and Tonight.

Thunderstorms will be ongoing this morning, some of which may be
severe, with hail being the main threat this morning.

Severe weather will become more widespread this afternoon with
damaging winds, large hail, flooding, and tornadoes all possible.
These threats may continue through tonight.

Flash flooding will also be possible through tonight with
localized very heavy rainfall possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flash flooding is possible Tuesday morning with
localized very heavy rainfall possible.

Thunderstorms will be possible Wednesday night through the
weekend. Some of these thunderstorms could be severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed today.

In the hours before

Local storm report, May 20, 10:36 AM CDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1036 AM CDT MON MAY 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0801 AM     HAIL             4 WSW AMARILLO          35.18N 101.89W
05/20/2019  E0.88 INCH       RANDALL            TX   TRAINED SPOTTER

&&

EVENT NUMBER AMA1900682

LE

Local storm report, May 20, 10:39 AM CDT, 1 hour 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1039 AM CDT MON MAY 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0814 AM     HAIL             2 SSE AMARILLO          35.18N 101.80W
05/20/2019  E1.00 INCH       RANDALL            TX   PUBLIC

            LATE REPORT FROM CAPROCK HIGH SCHOOL.

&&

EVENT NUMBER AMA1900683

LE

Local storm report, May 20, 10:40 AM CDT, 1 hour 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1040 AM CDT MON MAY 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0814 AM     HAIL             2 E AMARILLO            35.20N 101.78W
05/20/2019  E1.00 INCH       POTTER             TX   TRAINED SPOTTER

&&

EVENT NUMBER AMA1900684

LE

Local storm report, May 20, 10:52 AM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1052 AM CDT MON MAY 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1048 AM     FLASH FLOOD      1 N PRINGLE             35.96N 101.46W
05/20/2019                   HUTCHINSON         TX   EMERGENCY MNGR

            FLOODING IN AREA OF TEXAS HIGHWAY 136, WITH 18 INCHES
            RAPIDLY FLOWING OVER ROADWAY.

&&

EVENT NUMBER AMA1900685

LE

Special weather statement, May 20, 11:21 AM CDT, 1 hour 6 minutes before

Special Weather Statement
National Weather Service Amarillo TX
1121 AM CDT Mon May 20 2019

TXZ011-016-201645-
Deaf Smith TX-Oldham TX-
1121 AM CDT Mon May 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN OLDHAM AND WESTERN DEAF
SMITH COUNTIES UNTIL 1145 AM CDT...

At 1121 AM CDT, Doppler radar was tracking a strong thunderstorm 10
miles west of Simms, or 26 miles north of Friona, moving northeast at
35 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Vega, Adrian, Bootleg and Simms.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3476 10283 3490 10304 3551 10276 3523 10225
TIME...MOT...LOC 1621Z 215DEG 30KT 3502 10284

TLH

Special weather statement, May 20, 11:44 AM CDT, 43 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 20, 2:32 AM CDT	Special Weather Statement	AMA	Potter	58 min
May 20, 2:49 AM CDT	Special Weather Statement	AMA	Hartley, Oldham	56 min
May 20, 3:20 AM CDT	Special Weather Statement	AMA	Hartley, Sherman	55 min
May 20, 4:14 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	61 min
May 20, 4:18 AM CDT	Special Weather Statement	AMA	Sherman	57 min
May 20, 5:01 AM CDT	Special Weather Statement	AMA	Hansford	59 min
May 20, 5:13 AM CDT	Special Weather Statement	AMA	Sherman	62 min
May 20, 5:27 AM CDT	Areal Flood Advisory	AMA	Hansford, Hartley, Hutchinson, Moore, Sherman	6 hr
May 20, 5:40 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	53 min
May 20, 5:53 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	67 min
May 20, 6:29 AM CDT	Special Weather Statement	AMA	Oldham	61 min
May 20, 6:41 AM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	64 min
May 20, 7:04 AM CDT	Special Weather Statement	AMA	Sherman	56 min
May 20, 7:30 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Deaf Smith, Oldham, Potter, Randall	45 min
May 20, 7:45 AM CDT	Special Weather Statement	AMA	Moore, Sherman	45 min
May 20, 7:45 AM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	15 min
May 20, 8:10 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Hutchinson, Moore, Potter, Randall and 1 more	65 min
May 20, 8:23 AM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Hutchinson, Moore, Potter, Randall	3 hr
May 20, 8:56 AM CDT	Severe Thunderstorm Warning	AMA	Carson, Hansford, Hutchinson, Moore, Ochiltree, Potter and 1 more	27 min
May 20, 9:28 AM CDT	Flash Flood Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	3 hr
May 20, 9:45 AM CDT	Areal Flood Advisory	AMA	Lipscomb, Ochiltree, Roberts	3 hr
May 20, 9:52 AM CDT	Flash Flood Watch	AMA	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 6 more	21 hr
May 20, 10:32 AM CDT	Special Weather Statement	AMA	Lipscomb	28 min
May 20, 11:21 AM CDT	Special Weather Statement	AMA	Deaf Smith, Oldham	24 min
May 20, 11:29 AM CDT	Areal Flood Advisory	AMA	Carson, Moore, Potter	3 hr
May 20, 11:44 AM CDT	Special Weather Statement	AMA	Potter	46 min
May 20, 11:50 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	11 min
May 20, 11:59 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	46 min
May 20, 12:14 PM CDT	Severe Thunderstorm Warning	AMA	Hutchinson, Moore, Potter	30 min
May 20, 12:58 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	47 min
May 20, 1:45 PM CDT	Special Weather Statement	AMA	Hutchinson	30 min
May 20, 1:51 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	54 min
May 20, 1:53 PM CDT	Special Weather Statement	AMA	Wheeler	37 min
May 20, 2:03 PM CDT	Areal Flood Advisory	AMA	Hansford, Hutchinson, Moore, Sherman	3 hr
May 20, 2:53 PM CDT	Severe Thunderstorm Warning	AMA	Donley, Gray	52 min
May 20, 3:02 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Lipscomb, Ochiltree, Roberts, Wheeler	48 min
May 20, 3:10 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	65 min
May 20, 3:26 PM CDT	Tornado Warning	AMA	Collingsworth	49 min
May 20, 3:28 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	62 min
May 20, 3:33 PM CDT	Tornado Warning	AMA	Collingsworth, Donley	27 min
May 20, 3:35 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts, Wheeler	55 min
May 20, 3:52 PM CDT	Areal Flood Advisory	AMA	Collingsworth, Wheeler	4 hr
May 20, 3:57 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	24 min
May 20, 4:22 PM CDT	High Wind Watch	AMA	Deaf Smith, Oldham, Potter, Randall	15 hr
May 20, 4:39 PM CDT	Special Weather Statement	AMA	Donley	36 min
May 20, 5:03 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	38 min
May 20, 5:03 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth	57 min
May 20, 5:38 PM CDT	Tornado Warning	AMA	Collingsworth	17 min
May 20, 5:47 PM CDT	Dense Fog Advisory	AMA	Dallam, Hansford, Hartley, Hemphill, Hutchinson, Lipscomb and 4 more	12 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2019 Every severe thunderstorm warning in 2019

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.