Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Amarillo, TX

May 13, 2018Collingsworth County, Wheeler County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 13, 2018, 5:20 PM CDT for Collingsworth County, Wheeler County, Texas. It was in force for 55 min. 2 reports 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 13, 2018, 5:20 PM CDT (22:20 UTC)
Expired: May 13, 2018, 6:15 PM CDT
In force: 55 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Collingsworth County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 129 km from the middle of the area, began a volume at 22:20 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 13, 5:35 PM CDT	HAIL 2.5	2 W Lela, TX
May 13, 5:35 PM CDT	HAIL 3	2 W Lela, TX	PICTURE OF HAIL SENT VIA TWITTER.

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 13, 3:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 hours before the alert went out and 128 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: 61 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 2990 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

169 
WUUS54 KAMA 132220
SVRAMA
TXC087-483-132315-
/O.NEW.KAMA.SV.W.0021.180513T2220Z-180513T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
520 PM CDT SUN MAY 13 2018

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Wheeler County in the Panhandle of Texas...
  Northwestern Collingsworth County in the Panhandle of Texas...

* Until 615 PM CDT

* At 519 PM CDT, a severe thunderstorm was located over Lela, or 4
  miles west of Shamrock, moving northeast at 20 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...
  Shamrock, Briscoe, Wheeler, Twitty, Allison, Dozier and Lela. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3504 10033 3518 10054 3527 10054 3562 10028
      3562 10000 3533 10000
TIME...MOT...LOC 2219Z 206DEG 19KT 3522 10033 

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

LFM

2 follow-up statements

799 
WWUS54 KAMA 132302 RRA
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
602 PM CDT SUN MAY 13 2018

TXC087-132312-
/O.CAN.KAMA.SV.W.0021.000000T0000Z-180513T2315Z/
Collingsworth TX-
602 PM CDT SUN MAY 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN COLLINGSWORTH
COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
the Panhandle of Texas.

LAT...LON 3518 10017 3518 10054 3527 10054 3562 10028
      3562 10000 3533 10000
TIME...MOT...LOC 2302Z 206DEG 19KT 3543 10021 

$$

TXC483-132315-
/O.CON.KAMA.SV.W.0021.000000T0000Z-180513T2315Z/
Wheeler TX-
602 PM CDT SUN MAY 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR WHEELER COUNTY...

At 602 PM CDT, a severe thunderstorm was located near Wheeler, or 14
miles north of Shamrock, moving northeast at 20 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...
Shamrock, Briscoe, Wheeler, Allison, Lela and Twitty. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3518 10017 3518 10054 3527 10054 3562 10028
      3562 10000 3533 10000
TIME...MOT...LOC 2302Z 206DEG 19KT 3543 10021 

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

LFM

443 
WWUS54 KAMA 132313
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
613 PM CDT SUN MAY 13 2018

TXC483-132323-
/O.EXP.KAMA.SV.W.0021.000000T0000Z-180513T2315Z/
Wheeler TX-
613 PM CDT SUN MAY 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR WHEELER COUNTY WILL EXPIRE AT
615 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
is still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
the Panhandle of Texas.

LAT...LON 3518 10017 3518 10054 3527 10054 3562 10028
      3562 10000 3533 10000
TIME...MOT...LOC 2313Z 206DEG 19KT 3548 10018 

$$

LFM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:01 PM CDT	Special Weather Statement	AMA	Donley	44 min
May 12, 7:27 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	36 min
May 13, 3:39 AM CDT	Red Flag Warning	AMA	Dallam, Deaf Smith, Hartley, Oldham	17 hr
May 13, 3:41 PM CDT	Special Weather Statement	AMA	Roberts	49 min
May 13, 4:21 PM CDT	Special Weather Statement	AMA	Ochiltree	39 min
May 13, 4:37 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb, Ochiltree, Roberts	83 min
May 13, 4:40 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree, Roberts	73 min
May 13, 4:45 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	59 min
May 13, 5:08 PM CDT	Special Weather Statement	AMA	Donley	52 min
May 13, 5:14 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	61 min
May 13, 5:15 PM CDT	Areal Flood Advisory	AMA	Ochiltree	3 hr
May 13, 5:25 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Gray	65 min
May 13, 5:56 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	79 min
May 13, 6:06 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill	36 min
May 13, 6:09 PM CDT	Special Weather Statement	AMA	Wheeler	36 min
May 13, 6:15 PM CDT	Special Weather Statement	AMA	Wheeler	45 min
May 13, 6:28 PM CDT	Severe Thunderstorm Warning	AMA	Donley, Gray, Wheeler	62 min
May 13, 6:44 PM CDT	Areal Flood Advisory	AMA	Lipscomb	8 hr
May 13, 6:53 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Wheeler	67 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

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.