Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS Amarillo, TX

May 11, 2018Hemphill County, Wheeler County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 11, 2018, 6:05 PM CDT for Hemphill County, Wheeler County, Texas. It was in force for 85 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 11, 2018, 6:05 PM CDT (23:05 UTC)
Expired: May 11, 2018, 7:30 PM CDT
In force: 85 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hemphill County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 130 km from the middle of the area, began a volume at 23:06 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 11, 7:06 PM CDT	HAIL 1	1 N Wheeler, TX

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

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.1 hours before the alert went out and 129 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3114 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

174 
WUUS54 KAMA 112305
SVRAMA
TXC211-483-120030-
/O.NEW.KAMA.SV.W.0013.180511T2305Z-180512T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
605 PM CDT FRI MAY 11 2018

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Wheeler County in the Panhandle of Texas...
  Southeastern Hemphill County in the Panhandle of Texas...

* Until 730 PM CDT

* At 605 PM CDT, a severe thunderstorm was located 4 miles northeast
  of Kellerville, or 17 miles northwest 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, New Mobeetie, Twitty, Allison, Lela,
  Kellerville and Mobeetie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3519 10048 3542 10054 3556 10054 3585 10012
      3579 10000 3523 10000
TIME...MOT...LOC 2305Z 238DEG 18KT 3541 10044 

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

LG

5 follow-up statements

866 
WWUS54 KAMA 112330
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
630 PM CDT FRI MAY 11 2018

TXC211-483-120030-
/O.CON.KAMA.SV.W.0013.000000T0000Z-180512T0030Z/
Wheeler TX-Hemphill TX-
630 PM CDT FRI MAY 11 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR WHEELER AND SOUTHEASTERN HEMPHILL COUNTIES...

At 630 PM CDT, a severe thunderstorm was located over Wheeler, or 16
miles north of Shamrock, moving northeast at 20 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. Hail damage to vehicles is 
         expected. 

Locations impacted include...
Shamrock, Briscoe, Wheeler, New Mobeetie, Twitty, Allison, Lela,
Kellerville and Mobeetie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3519 10048 3542 10054 3556 10054 3567 10033
      3579 10000 3523 10000
TIME...MOT...LOC 2330Z 244DEG 18KT 3545 10032 

HAIL...1.00IN
WIND...70MPH
 
$$

LG

636 
WWUS54 KAMA 112346
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
646 PM CDT FRI MAY 11 2018

TXC211-483-120030-
/O.CON.KAMA.SV.W.0013.000000T0000Z-180512T0030Z/
Wheeler TX-Hemphill TX-
646 PM CDT FRI MAY 11 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR WHEELER AND SOUTHEASTERN HEMPHILL COUNTIES...

At 646 PM CDT, a severe thunderstorm was located over Wheeler, or 16
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...
Briscoe, Wheeler, New Mobeetie, Twitty, Allison, Kellerville and
Mobeetie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3524 10049 3542 10054 3556 10054 3567 10033
      3579 10000 3533 10000
TIME...MOT...LOC 2346Z 237DEG 16KT 3544 10032 

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

LG

748 
WWUS54 KAMA 120006
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
706 PM CDT FRI MAY 11 2018

TXC211-483-120030-
/O.CON.KAMA.SV.W.0013.000000T0000Z-180512T0030Z/
Wheeler TX-Hemphill TX-
706 PM CDT FRI MAY 11 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR CENTRAL WHEELER AND SOUTHEASTERN HEMPHILL COUNTIES...

At 706 PM CDT, a severe thunderstorm was located over Wheeler, or 14
miles north of Shamrock, moving northeast at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. Hail damage to vehicles is 
         expected. 

Locations impacted include...
Briscoe, Wheeler, Allison and Twitty. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3525 10044 3543 10046 3549 10043 3565 10031
      3579 10000 3533 10000
TIME...MOT...LOC 0006Z 234DEG 30KT 3542 10031 

HAIL...1.00IN
WIND...70MPH
 
$$

LG

224 
WWUS54 KAMA 120016
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
716 PM CDT FRI MAY 11 2018

TXC211-483-120030-
/O.CON.KAMA.SV.W.0013.000000T0000Z-180512T0030Z/
Wheeler TX-Hemphill TX-
716 PM CDT FRI MAY 11 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR EASTERN WHEELER AND SOUTHEASTERN HEMPHILL COUNTIES...

At 715 PM CDT, a severe thunderstorm was located over Wheeler, or 17
miles north of Shamrock, moving northeast at 30 mph.

HAZARD...70 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. Hail damage to vehicles is 
         expected. 

Locations impacted include...
Wheeler, Allison and Twitty. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3526 10036 3549 10037 3556 10030 3579 10000
      3533 10000
TIME...MOT...LOC 0015Z 233DEG 24KT 3547 10026 

HAIL...1.25IN
WIND...70MPH
 
$$

LG

827 
WWUS54 KAMA 120022
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
722 PM CDT FRI MAY 11 2018

TXC211-483-120030-
/O.CON.KAMA.SV.W.0013.000000T0000Z-180512T0030Z/
Wheeler TX-Hemphill TX-
722 PM CDT FRI MAY 11 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR EASTERN WHEELER AND SOUTHEASTERN HEMPHILL COUNTIES...

At 722 PM CDT, severe thunderstorms were located along a line
extending from 5 miles northeast of Wheeler to 12 miles south of
Allison to Twitty, moving northeast at 30 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. Hail damage to vehicles is 
         expected. 

Locations impacted include...
Wheeler, Allison and Twitty. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3527 10032 3556 10030 3579 10000 3533 10000
TIME...MOT...LOC 0022Z 246DEG 24KT 3551 10021 3543 10016 3532 10021 

HAIL...1.00IN
WIND...70MPH
 
$$

LG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:54 AM CDT	Fire Weather Watch	AMA	Dallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more	24 hr
May 11, 3:54 AM CDT	Red Flag Warning	AMA	Armstrong, Carson, Dallam, Deaf Smith, Hansford, Hartley and 6 more	17 hr
May 11, 5:40 PM CDT	Special Weather Statement	AMA	Wheeler	35 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.