Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 161, NWS Amarillo, TX

July 15, 20095 counties in Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 15, 2009, 10:12 PM CDT for 5 counties in Texas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 15, 2009, 10:12 PM CDT (03:12 UTC)
Expired: Jul 15, 2009, 11:00 PM CDT
In force: 48 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

Counties Carson County, TX, Hansford County, TX, Hutchinson County, TX, Ochiltree County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 93 km from the middle of the area, began a volume at 03:12 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, 3.2 hours before the alert went out and 93 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: 72 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 3238 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -83 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 15, 8:46 PM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jul 15, 8:46 PM CDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jul 15, 1:00 PM CDT, 9 hours 12 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT WED JUL 15 2009

OKZ001>003-TXZ001>020-161100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
100 PM CDT WED JUL 15 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON
AND TONIGHT ACROSS ALL OF THE OKLAHOMA AND TEXAS PANHANDLES DUE
TO THE COMBINATION OF A WEAK STATIONARY FRONT IN THE AREA...
SUFFICIENT MOISTURE...AND AN APPROACHING MINOR UPPER LEVEL LOW
PRESSURE SYSTEM FROM THE NORTHWEST. A FEW OF THE STORMS THAT DEVELOP
WILL HAVE THE POTENTIAL TO BECOME SEVERE...WITH DAMAGING WINDS AND
LARGE HAIL THE PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...

THERE IS A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS THURSDAY
AFTERNOON THROUGH SATURDAY NIGHT...AND AGAIN ON SUNDAY NIGHT AND
MONDAY NIGHT ACROSS MOST OF THE OKLAHOMA AND TEXAS PANHANDLES.
SOME OF THE STORMS WHICH DEVELOP DURING THIS TIME MAY BECOME STRONG
TO SEVERE WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY THREATS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS ACROSS ALL OF THE
OKLAHOMA AND TEXAS PANHANDLES SHOULD REMAIN ALERT AND BE READY FOR
POSSIBLE ACTIVATION LATER THIS AFTERNOON AND EVENING.

ANDRADE

In the hours before

Special weather statement, Jul 15, 6:12 PM CDT, 4 hours before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
612 PM CDT WED JUL 15 2009

OKZ003-160015-
BEAVER OK-
612 PM CDT WED JUL 15 2009

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY EFFECTIVE UNTIL 715 PM CDT FOR NORTHWEST BEAVER
COUNTY.

AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES NORTHEAST OF TURPIN...MOVING EAST
SOUTHEAST AT 15 MPH.

UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.
IN ADDITION...BRIEF HEAVY RAINFALL MAY RESULT HOURLY RAINFALL RATES
UP TO ONE INCH.

NUNEZ

Local storm report, Jul 15, 8:52 PM CDT, 1 hour 20 minutes before

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Local storm report, Jul 15, 8:53 PM CDT, 1 hour 19 minutes before

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Special weather statement, Jul 15, 9:31 PM CDT, 41 minutes before

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Special weather statement, Jul 15, 9:41 PM CDT, 31 minutes before

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Local storm report, Jul 15, 10:06 PM CDT, 6 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 15, 7:30 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	60 min
Jul 15, 8:26 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb, Ochiltree	64 min
Jul 16, 5:00 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
Jul 16, 5:15 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	60 min
Jul 16, 5:29 PM CDT	Flash Flood Warning	AMA	Potter, Randall	2 hr
Jul 16, 4:52 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron, Texas	26 min
Jul 16, 5:36 PM CDT	Severe Thunderstorm Warning	AMA	Texas	54 min
Jul 16, 5:53 PM CDT	Severe Thunderstorm Warning	AMA	Beaver, Texas	48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm warning in 2009

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.