Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Amarillo, TX

July 4, 2017Armstrong County, Randall County, Texas

NWS Amarillo, TX issued this special weather statement at Jul 4, 2017, 10:10 PM CDT for Armstrong County, Randall County, Texas. It was in force for 65 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: Jul 4, 2017, 10:10 PM CDT (03:10 UTC)
Expired: Jul 4, 2017, 11:15 PM CDT
In force: 65 min
Issued by: NWS Amarillo, TX

Counties Armstrong County, TX, Randall County, TX

The radar

The Amarillo radar (KAMA), 25 km from the middle of the area, began a volume at 03:10 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
Jul 4, 10:13 PM CDT	TSTM WND GST 59	4 Nnw Lake Tanglewood, TX
Jul 4, 10:33 PM CDT	TSTM WND GST 65	4 Se Canyon, TX	LATE REPORT OF 60 TO 70 MPH WINDS. TIME ESTIMATED BY RADAR.

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 00:00Z, 3.2 hours before the alert went out and 25 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: 1493 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 2287 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

424 
WWUS84 KAMA 050310
SPSAMA

Special Weather Statement
National Weather Service Amarillo TX
1010 PM CDT TUE JUL 4 2017
 
TXZ012-013-017-018-050415-
Potter TX-Randall TX-Carson TX-Armstrong TX-
1010 PM CDT TUE JUL 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR RANDALL...NORTHERN ARMSTRONG...
SOUTHWESTERN CARSON AND SOUTHERN POTTER COUNTIES UNTIL 1115 PM CDT...

At 1008 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Panhandle to 7 miles southwest of Bushland.
Movement was south at 30 mph.

Wind gusts up to 50 mph will be possible with these storms. 

Locations impacted include...
Amarillo, Canyon, Claude, Lake Tanglewood, Mescalero Park, Bushland,
Buffalo Lake, Washburn, Umbarger, Palo Duro Canyon, Timbercreek
Canyon and Pantex.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.
 
&&

LAT...LON 3520 10216 3539 10148 3496 10113 3475 10204
      3475 10215
TIME...MOT...LOC 0308Z 359DEG 20KT 3533 10140 3511 10215 

$$

MJG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:17 PM CDT	Special Weather Statement	AMA	Deaf Smith	43 min
Jul 4, 7:23 PM CDT	Special Weather Statement	AMA	Carson	37 min
Jul 4, 7:30 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Randall	60 min
Jul 4, 7:46 PM CDT	Special Weather Statement	AMA	Hartley	44 min
Jul 4, 8:09 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	66 min
Jul 4, 9:11 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	66 min
Jul 4, 9:39 PM CDT	Severe Thunderstorm Warning	AMA	Potter	36 min
Jul 4, 10:32 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	58 min
Jul 4, 11:32 PM CDT	Special Weather Statement	AMA	Armstrong, Donley	43 min
Jul 5, 12:14 AM CDT	Special Weather Statement	AMA	Donley	31 min
Jul 5, 12:45 AM CDT	Special Weather Statement	AMA	Donley, Gray	45 min
Jul 5, 1:13 AM CDT	Areal Flood Advisory	AMA	Gray, Roberts	3 hr
Jul 5, 1:28 AM CDT	Special Weather Statement	AMA	Hemphill	47 min
Jul 5, 1:32 AM CDT	Special Weather Statement	AMA	Collingsworth	43 min

Nearby

Special Weather Statements in Texas, 2017 Every special weather statement in 2017

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.