Alert archive / Texas / Areal Flood Warnings in 2012

Areal Flood Warning 4, NWS Amarillo, TX

April 30, 2012Collingsworth County, Donley County, Texas

NWS Amarillo, TX issued this areal flood warning at Apr 30, 2012, 11:38 PM CDT for Collingsworth County, Donley County, Texas. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 30, 2012, 11:38 PM CDT (04:38 UTC)
Expired: May 1, 2012, 11:20 AM CDT
In force: 12 hr
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Flood severity: None

Counties Collingsworth County, TX, Donley County, TX

The radar

The Amarillo radar (KAMA), 110 km from the middle of the area, began a volume at 04:38 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, 4.6 hours before the alert went out and 109 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2953 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 266 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 areal flood 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 areal flood warning went out at Apr 30, 10:47 PM CDT, 51 minutes earlier.

Area forecast discussion, Apr 30, 10:47 PM CDT, 51 minutes before

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Hazardous weather outlook, Apr 30, 10:52 PM CDT, 46 minutes before

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In the hours before

Local storm report, Apr 30, 9:05 PM CDT, 2 hours 33 minutes before

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Local storm report, Apr 30, 9:20 PM CDT, 2 hours 18 minutes before

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Local storm report, Apr 30, 9:38 PM CDT, 2 hours before

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Local storm report, Apr 30, 10:01 PM CDT, 1 hour 37 minutes before

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Local storm report, Apr 30, 11:14 PM CDT, 24 minutes before

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Special weather statement, Apr 30, 11:31 PM CDT, 7 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
Apr 30, 7:04 PM CDT	Areal Flood Advisory	AMA	Armstrong	3 hr
Apr 30, 7:13 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Collingsworth, Donley, Gray, Wheeler	62 min
Apr 30, 7:37 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	53 min
Apr 30, 7:52 PM CDT	Severe Thunderstorm Warning	AMA	Donley	53 min
Apr 30, 8:16 PM CDT	Severe Thunderstorm Warning	AMA	Donley	22 min
Apr 30, 8:30 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	60 min
Apr 30, 8:48 PM CDT	Severe Thunderstorm Warning	AMA	Donley	27 min
Apr 30, 8:49 PM CDT	Flash Flood Warning	AMA	Collingsworth, Donley	3 hr
Apr 30, 9:27 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	63 min
May 1, 3:54 PM CDT	Fire Weather Watch	AMA	Dallam, Deaf Smith, Hartley, Oldham	12 hr

Nearby

Areal Flood Warnings in Texas, 2012 Every areal flood warning in 2012

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.