Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 269, NWS Amarillo, TX

September 7, 2007Deaf Smith County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 7, 2007, 2:57 PM CDT for Deaf Smith County, Texas. It was in force for 63 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
Sep 7, 2007, 2:57 PM CDT (19:57 UTC)
Expired
Sep 7, 2007, 4:00 PM CDT
In force
63 min
Issued by
NWS Amarillo, TX
Area
Counties, with a storm outline in the text

County Deaf Smith County, TX

The radar

The Amarillo radar (KAMA), 87 km from the middle of the area, began a volume at 19:59 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 12:00Z, 8.0 hours before the alert went out and 87 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2007-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1075 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2007-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1075 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
135 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 Sep 7, 2:39 PM CDT, 18 minutes earlier.

Area forecast discussion, Sep 7, 2:39 PM CDT, 18 minutes before
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Hazardous weather outlook, Sep 7, 1:00 PM CDT, 1 hour 57 minutes before
TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT FRI SEP 7 2007

OKZ001>003-TXZ001>020-081100-
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 FRI SEP 7 2007

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

.DAY ONE...

SCATTERED THUNDERSTORMS ARE EXPECTED TO GENERATE ALONG A SLOW
MOVING COLD FRONT THIS AFTERNOON AND TONIGHT AS DAYTIME HEATING
ACTS ON A TROPICAL AIRMASS IN PLACE OVER THE TEXAS AND OKLAHOMA
PANHANDLES. A FEW OF THE STORMS COULD BECOME SEVERE...WITH
DAMAGING WINDS AND MARGINALLY SEVERE HAIL POSSIBLE. IN ADDITION...
LOCALLY HEAVY RAINFALL MAY OCCUR...WHICH MAY LEAD TO LOCALIZED
FLOODING OR FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...

THERE IS A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS SATURDAY THROUGH
MONDAY NIGHT ACROSS THE OKLAHOMA AND TEXAS PANHANDLES. ANY STORMS
THAT FORM ARE EXPECTED TO REMAIN BELOW SEVERE LEVELS AT THIS TIME.
HOWEVER...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THE STRONGEST
STORMS...WHICH MAY LEAD TO LOCALIZED FLOODING OR FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

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

ANDRADE

In the hours before

Local storm report, Sep 7, 10:53 AM CDT, 4 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1053 AM CDT FRI SEP 07 2007

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND GST     6 NE MCLEAN             35.29N 100.52W
09/06/2007  E60 MPH          WHEELER            TX   PUBLIC

            40 FOOT TELEVISION ANTENNA BLOWN DOWN

&&

SMB
Local storm report, Sep 7, 10:54 AM CDT, 4 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1054 AM CDT FRI SEP 07 2007

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0520 PM     TSTM WND GST     7 S MCLEAN              35.13N 100.60W
09/06/2007  E65 MPH          DONLEY             TX   PUBLIC

            8 INCH COTTONWOOD TREE LIMBS DOWN

&&

SMB
Local storm report, Sep 7, 1:15 PM CDT, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
115 PM CDT FRI SEP 07 2007

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0510 PM     TSTM WND GST     MCLEAN                  35.23N 100.60W
09/06/2007  M60 MPH          GRAY               TX   BROADCAST MEDIA

0515 PM     TSTM WND GST     MCLEAN                  35.23N 100.60W
09/06/2007  M65 MPH          GRAY               TX   BROADCAST MEDIA

0515 PM     TSTM WND GST     6 NE MCLEAN             35.29N 100.52W
09/06/2007  E60 MPH          WHEELER            TX   PUBLIC

            40 FOOT TELEVISION ANTENNA BLOWN DOWN

0519 PM     TSTM WND GST     MCLEAN                  35.23N 100.60W
09/06/2007  M61 MPH          GRAY               TX   BROADCAST MEDIA

            MEDIA RELAYED SCHOOLNET REPORT FROM MCLEAN

0520 PM     TSTM WND GST     1 E MCLEAN              35.23N 100.58W
09/06/2007  M67 MPH          GRAY               TX   MESONET

            58 KNOT GUST REPORTED BY WEST TEXAS MESONET

0520 PM     TSTM WND GST     MCLEAN                  35.23N 100.60W
09/06/2007  E70 MPH          GRAY               TX   EMERGENCY MNGR

            2 INCH BRANCHES DOWN OVER WIDESPREAD AREA

0520 PM     TSTM WND GST     7 S MCLEAN              35.13N 100.60W
09/06/2007  E65 MPH          DONLEY             TX   PUBLIC

            8 INCH COTTONWOOD TREE LIMBS DOWN

0522 PM     TSTM WND GST     MCLEAN                  35.23N 100.60W
09/06/2007  E60 MPH          GRAY               TX   CO-OP OBSERVER

            UNSECURED ITEMS BLOWN AWAY

&&

ERA
Local storm report, Sep 7, 2:31 PM CDT, 26 minutes before
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Special weather statement, Sep 7, 2:53 PM CDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 1:56 PM CDTFlash Flood WarningAMARandall3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2007Every severe thunderstorm warning in 2007

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.