A very dynamic storm system brought a variety of severe weather impacts to the South Plains of west Texas late on the 27th.
Moist and sub-freezing upslope northeasterly flow behind a cold front resulted in persistent ice fog through much of the day over the extreme southeastern Texas Panhandle, particularly along the Caprock Escarpment. Although ice accumulated on most exposed surfaces, no adverse impacts were reported.
By late afternoon, weather impacts became much more intense and diverse. An area of heavy snow developed over the extreme southwestern Texas Panhandle and the northwestern South Plains. The area of wintry precipitation quickly moved northeastward, but not before accumulating snows occurred over the area and resulted in treacherous travel conditions. Roadways, including major interstate highways, became snowpacked - and remained dangerous through much of the morning hours on the 28th.
Reported snow accumulations follow:  4 inches at Happy (Swisher County), 3 inches at Lazbuddie (Parmer County), 3 inches at Tulia (Swisher County), 2 inches at Nazareth (Castro County), 1 inch at Dimmitt (Castro County), 1 inch at Plainview (Hale County), and 1 inch at Silverton (Briscoe County).
South of the snow band, strong winds advected eastward behind a dryline-like feature that moved over the western and central South Plains. Wind gusts in excess of 40 mph were recorded at a number of Texas Tech University West Texas Mesonet sites over the western South Plains. Wind contributed to the failure of a metal shed building in northwest Lubbock. In addition, two non-mesocyclonic tornadoes were observed and photographed in the Lubbock vicinity. These tornadoes developed near a deepening surface low and its associated surface boundaries, and beneath towering cumulus clouds within a strongly unstable low-level airmass. No measurable precipitation occurred in association with the tornadic cumuliform clouds.

Tornado in LUBBOCK, TEXAS
From 27-DEC-07 17:18:00 to 27-DEC-07 17:23:00 (CST-6)
Location: BROADVIEW
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A non-mesocyclonic tornado was photographed by the public as it traversed across open county just north of Lubbock around 17:20 CST on the 27th. The tornado apparently developed as towering cumuliform clouds formed above an advancing low-level boundary. Witnesses report that the tornado persisted for five minutes. No damage was reported.

Freezing Fog in BRISCOE, TEXAS
From 27-DEC-07 09:00:00 to 27-DEC-07 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Winter Weather in CASTRO, TEXAS
From 27-DEC-07 15:00:00 to 27-DEC-07 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy Snow in SWISHER, TEXAS
From 27-DEC-07 15:00:00 to 27-DEC-07 20:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Weather in HALE, TEXAS
From 27-DEC-07 15:00:00 to 27-DEC-07 20:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado in LUBBOCK, TEXAS
From 27-DEC-07 17:30:00 to 27-DEC-07 17:34:00 (CST-6)
Location: SLATON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The local media relayed video of a tornado near U.S. Highway 84 between Slaton and Southland. The video showed a well-develop tornado just east of the highway over open fields. No damage was reported.

Freezing Fog in HALL, TEXAS
From 27-DEC-07 09:00:00 to 27-DEC-07 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Winter Weather in PARMER, TEXAS
From 27-DEC-07 15:00:00 to 27-DEC-07 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Weather in BRISCOE, TEXAS
From 27-DEC-07 15:00:00 to 27-DEC-07 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong Wind in LUBBOCK, TEXAS
From 27-DEC-07 17:00:00 to 27-DEC-07 18:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong winds contributed to the failure of a metal shed in the northwestern portions of Lubbock. The shed, which was not tied down, was blown up against a nearby home and resulted in minor structural damage. No other damage occurred in the immediate area, and nearby observations from the Texas Tech University West Texas Mesonet failed to show evidence of high winds. It is estimated that gusts were locally in excess of 40 mph. Similar wind speeds were common west of the city as a dryline-like feature translated eastward across the region.