Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 78, NWS Amarillo, TX

May 16, 2021Sherman County, Texas; Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 16, 2021, 9:19 PM CDT for Sherman County, Texas; Texas County, Oklahoma. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 16, 2021, 9:19 PM CDT (02:19 UTC)
Expired: May 16, 2021, 10:00 PM CDT
In force: 41 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Texas County, OK, Sherman County, TX

The radar

The Amarillo radar (KAMA), 174 km from the middle of the area, began a volume at 02:18 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 16, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.3 hours before the alert went out and 175 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: 449 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 2191 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

173 
WUUS54 KAMA 170219
SVRAMA
OKC139-TXC421-170300-
/O.NEW.KAMA.SV.W.0078.210517T0219Z-210517T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
919 PM CDT Sun May 16 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Western Texas County in the Panhandle of Oklahoma...
  North central Sherman County in the Panhandle of Texas...

* Until 1000 PM CDT.

* At 919 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Eva, or 20 miles south of Elkhart, moving east at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to roofs, siding, and trees is possible. 
           Hail damage to vehicles is expected.

* Locations impacted include...
  Eva and Texhoma. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3699 10163 3642 10178 3659 10203 3682 10203
      3697 10200
TIME...MOT...LOC 0219Z 284DEG 15KT 3671 10197 

HAIL...1.00IN
WIND...60MPH
 
$$

Rutt

1 follow-up statement

121 
WWUS54 KAMA 170253
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
953 PM CDT Sun May 16 2021

OKC139-TXC421-170303-
/O.EXP.KAMA.SV.W.0078.000000T0000Z-210517T0300Z/
Texas OK-Sherman TX-
953 PM CDT Sun May 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN TEXAS AND NORTH
CENTRAL SHERMAN COUNTIES WILL EXPIRE AT 1000 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
the Panhandle of Oklahoma...and the Panhandle of Texas.

LAT...LON 3699 10163 3642 10178 3659 10203 3682 10203
      3697 10200
TIME...MOT...LOC 0253Z 293DEG 19KT 3666 10176 

$$

Rutt

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:01 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	14 min
May 16, 7:06 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	54 min
May 16, 7:15 PM CDT	Flash Flood Warning	AMA	Randall	5 hr
May 16, 7:20 PM CDT	Severe Thunderstorm Warning	AMA	Donley	55 min
May 16, 7:35 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	55 min
May 16, 7:44 PM CDT	Severe Thunderstorm Warning	AMA	Randall	61 min
May 16, 7:46 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	59 min
May 16, 7:58 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley, Sherman	62 min
May 16, 8:13 PM CDT	Severe Thunderstorm Warning	AMA	Donley	62 min
May 16, 8:47 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Oldham, Potter	43 min
May 16, 9:08 PM CDT	Areal Flood Advisory	AMA	Donley	3 hr
May 16, 11:37 PM CDT	Special Weather Statement	AMA	Oldham	23 min
May 16, 11:40 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
May 17, 12:06 AM CDT	Special Weather Statement	AMA	Potter	24 min
May 17, 12:12 AM CDT	Special Weather Statement	AMA	Oldham	33 min
May 17, 12:16 AM CDT	Areal Flood Advisory	AMA	Randall	3 hr
May 17, 12:35 AM CDT	Special Weather Statement	AMA	Randall	25 min
May 17, 12:45 AM CDT	Special Weather Statement	AMA	Potter	30 min
May 17, 12:46 AM CDT	Special Weather Statement	AMA	Potter	29 min
May 17, 1:02 AM CDT	Special Weather Statement	AMA	Randall	28 min
May 17, 2:58 PM CDT	Flash Flood Watch	AMA	Armstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 4 more	7 hr
May 17, 4:47 PM CDT	Special Weather Statement	AMA	Oldham	43 min
May 17, 5:16 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree, Roberts	59 min
May 17, 5:48 PM CDT	Special Weather Statement	AMA	Hartley, Oldham	57 min
May 17, 5:50 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	55 min
May 17, 6:14 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	41 min
May 17, 6:28 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Randall	62 min
May 17, 6:33 PM CDT	Tornado Warning	AMA	Hartley, Oldham	19 min
May 17, 6:42 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	93 min
May 17, 6:54 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	66 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning in 2021

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.