Alert archive / Texas / Blizzard Watches in 2011

Blizzard Watch 1, NWS Amarillo, TX

December 18, 201112 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this blizzard watch at Dec 18, 2011, 4:50 AM CST for 12 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma. It took effect at Dec 19, 2011, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Dec 18, 2011, 4:50 AM CST (10:50 UTC)
In effect from: Dec 19, 2011, 6:00 AM CST
Expired: Dec 18, 2011, 3:19 PM CST
In force
Issued by: NWS Amarillo, TX

Counties Beaver County, OK, Cimarron County, OK, Texas County, OK, Dallam County, TX, Deaf Smith County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 85 km from the middle of the area, began a volume at 10:55 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, 10.8 hours before the alert went out and 85 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: 1307 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -2 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 blizzard watch 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 blizzard watch went out at Dec 17, 11:31 PM CST, 5 hours 19 minutes earlier.

Area forecast discussion, Dec 17, 11:31 PM CST, 5 hours 19 minutes before

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Hazardous weather outlook, Dec 17, 9:23 PM CST, 7 hours 27 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
Dec 18, 3:19 PM CST	Blizzard Warning	AMA	Dallam, Deaf Smith, Hansford, Hartley, Hutchinson, Lipscomb and 6 more	45 hr
Dec 18, 3:19 PM CST	Winter Storm Warning	AMA	Armstrong, Carson, Gray, Hemphill, Roberts	29 hr
Dec 18, 3:19 PM CST	Winter Weather Advisory	AMA	Collingsworth, Donley, Wheeler	29 hr

Nearby

Blizzard Watches in Texas, 2011 Blizzard Watches in Oklahoma, 2011 Every blizzard watch in 2011

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.