Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS Amarillo, TX

May 16, 2021Dallam County, Hartley County, Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 16, 2021, 7:58 PM CDT for Dallam County, Hartley County, Sherman County, Texas. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 16, 2021, 7:58 PM CDT (00:58 UTC)
Expired: May 16, 2021, 9:00 PM CDT
In force: 62 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Dallam County, TX, Hartley County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 135 km from the middle of the area, began a volume at 01:01 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.

What was reported inside it

Time	Report	Where	Remark
May 16, 7:59 PM CDT	HAIL 1.5	9 Nw Ware, TX	ACCUMULATING HAIL BETWEEN PEA AND DIME SIZE, WITH LARGER STONES UP TO PING PONG BALL NOTED. AREA ROADWAY IS COVERED WITH HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 1.0 hours before the alert went out and 136 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.

006 
WUUS54 KAMA 170058
SVRAMA
TXC111-205-421-170200-
/O.NEW.KAMA.SV.W.0075.210517T0058Z-210517T0200Z/

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

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  West central Sherman County in the Panhandle of Texas...
  Dallam County in the Panhandle of Texas...
  Eastern Hartley County in the Panhandle of Texas...

* Until 900 PM CDT.

* At 758 PM CDT, a severe thunderstorm was located 7 miles northwest
  of Ware, or 21 miles northwest of Dalhart, moving southeast at 35
  mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Trained weather spotters.

  IMPACT...Minor damage to roofs, siding, and trees is possible. 
           People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Hail may 
           accumulate on roadways causing hazardous travel.

* Locations impacted include...
  Dalhart, Stratford, Hartley, Ware and Conlen. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3630 10304 3646 10285 3634 10197 3562 10255
      3562 10257 3626 10304
TIME...MOT...LOC 0058Z 297DEG 29KT 3626 10280 

HAIL...1.50IN
WIND...60MPH
 
$$

Rutt

1 follow-up statement

300 
WWUS54 KAMA 170158
SVSAMA

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

TXC111-205-421-170208-
/O.EXP.KAMA.SV.W.0075.000000T0000Z-210517T0200Z/
Sherman TX-Dallam TX-Hartley TX-
858 PM CDT Sun May 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SHERMAN...DALLAM
AND EASTERN HARTLEY COUNTIES WILL EXPIRE AT 900 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 Texas.

LAT...LON 3630 10304 3646 10285 3634 10197 3562 10255
      3562 10257 3626 10304
TIME...MOT...LOC 0158Z 297DEG 29KT 3604 10228 

$$

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, 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, 9:19 PM CDT	Severe Thunderstorm Warning	AMA	Sherman	41 min
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 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.