Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Amarillo, TX

July 2, 2017Donley County, Texas

NWS Amarillo, TX issued this special weather statement at Jul 2, 2017, 2:13 AM CDT for Donley County, Texas. It was in force for 32 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: Jul 2, 2017, 2:13 AM CDT (07:13 UTC)
Expired: Jul 2, 2017, 2:45 AM CDT
In force: 32 min
Issued by: NWS Amarillo, TX

County Donley County, TX

The radar

The Amarillo radar (KAMA), 77 km from the middle of the area, began a volume at 07:16 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.2 hours before the alert went out and 76 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: 575 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 2143 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Amarillo, TX wrote its last area forecast discussion before this special weather statement went out at Jul 2, 12:52 AM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jul 2, 12:52 AM CDT, 1 hour 21 minutes before

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Hazardous weather outlook, Jul 1, 3:37 PM CDT, 10 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
337 PM CDT Sat Jul 1 2017

OKZ001>003-TXZ001>020-021100-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
337 PM CDT Sat Jul 1 2017

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Through Tonight.

Thunderstorms are expected to develop across the western
Panhandles later this evening, and become more of a line moving
across the entire Panhandles overnight tonight. Some storms could
be strong to marginally severe, producing hail up to half dollar
size and gusts around 65 MPH. Brief heavy rain will also be
possible with the storms tonight, which could lead to localized
flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Thunderstorms will be possible for various portions of the
Panhandles Sunday through Wednesday night. Some storms Sunday and
Monday could become strong to marginally severe, producing one
inch hail and 60 MPH gusts. The threat for organized severe
weather will be low Tuesday through Wednesday night.

.SPOTTER INFORMATION STATEMENT...

Emergency Managers and spotter groups across southwest half of the
Combined Oklahoma and Texas Panhandles should remain alert for
possible activation this evening and tonight.

Cockrell

In the hours before

Special weather statement, Jul 1, 8:17 PM CDT, 5 hours 56 minutes before

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Special weather statement, Jul 1, 9:48 PM CDT, 4 hours 25 minutes before

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Special weather statement, Jul 1, 11:36 PM CDT, 2 hours 37 minutes before

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Special weather statement, Jul 2, 2:13 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 7:10 PM CDT	Special Weather Statement	AMA	Hartley	50 min
Jul 1, 7:57 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	93 min
Jul 1, 8:17 PM CDT	Special Weather Statement	AMA	Dallam	58 min
Jul 1, 8:58 PM CDT	Areal Flood Advisory	AMA	Oldham	3 hr
Jul 1, 9:48 PM CDT	Special Weather Statement	AMA	Deaf Smith, Oldham	72 min
Jul 1, 11:00 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter, Randall	60 min
Jul 1, 11:36 PM CDT	Special Weather Statement	AMA	Randall	54 min
Jul 2, 6:02 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	43 min
Jul 2, 6:48 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.