Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 286, NWS Amarillo, TX

October 11, 2007Deaf Smith County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Oct 11, 2007, 4:38 PM CDT for Deaf Smith County, Texas. It was in force for 30 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: Oct 11, 2007, 4:38 PM CDT (21:38 UTC)
Expired: Oct 11, 2007, 5:08 PM CDT
In force: 30 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

County Deaf Smith County, TX

The radar

The Amarillo radar (KAMA), 87 km from the middle of the area, began a volume at 21:42 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, 9.6 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-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: 1347 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.8

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 Oct 11, 3:49 PM CDT, 49 minutes earlier.

Area forecast discussion, Oct 11, 3:49 PM CDT, 49 minutes before

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Hazardous weather outlook, Oct 11, 1:00 PM CDT, 3 hours 38 minutes before

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In the hours before

Local storm report, Oct 11, 1:49 PM CDT, 2 hours 49 minutes before

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Local storm report, Oct 11, 2:26 PM CDT, 2 hours 12 minutes before

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Local storm report, Oct 11, 2:33 PM CDT, 2 hours 5 minutes before

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Local storm report, Oct 11, 2:34 PM CDT, 2 hours 4 minutes before

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Special weather statement, Oct 11, 3:57 PM CDT, 41 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
Oct 10, 7:00 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	60 min
Oct 10, 7:45 PM CDT	Severe Thunderstorm Warning	AMA	Sherman	60 min
Oct 10, 8:56 PM CDT	Flash Flood Warning	AMA	Potter, Randall	3 hr
Oct 11, 7:31 AM CDT	Severe Thunderstorm Warning	AMA	Roberts	59 min
Oct 11, 10:28 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	92 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every 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.