National Weather Service United States Department of Commerce

Mountain Woods Lake (Jefferson and Blount Counties) EF-2 Tornado
April 27, 2011
 

 
EF-2
Estimated Maximum Wind:
135 mph
Injuries/Fatalities:
3 Injuries
Damage Path Length:
3.23 miles
Maximum Path Width:
200 yards
Approximate Start Point/Time:
33.8300/-86.8012 at 553 am
Approximate End Point/Time:
33.8627/-86.7610 at 557 am

National Weather Service meteorologists surveyed damage across far northeast Jefferson County and southern Blount County. It has been determined that the damage was consistent with a tornado. Winds were estimated at 135 mph. A tornado developed along a Quasi-Linear Convective System. It touched down in far northern Jefferson County, northeast of Warrior, and tracked northeastward into Blount County and across the western bank of Mountain Woods Lake before it lifted northeast of Sagefield Rd. The damage along the Jefferson County portion of the track was consistent with an EF1 rating with winds of 95 mph. The tornado touched down east of Old Hayden Rd, and tracked northeast where it downed dozens of trees along Mabel Dr. This resulted in damage to several homes. The tornado moved into Blount County near Sibleyville Rd.

As the tornado moved into Blount County near Sibleyville Rd, it intensified to an EF2 rating with winds of 135 mph. An outbuilding was destroyed and many trees downed near the county line. The tornado continued northeast, before it made a slight eastward turn and moved along the western edge of Mountain Woods Lake. Along the lake, twenty to twenty-five homes were damaged with at least 3 homes destroyed. Three injuries occurred while a family was sheltered in their home, which was destroyed. In addition, multiple boat docks and garages were damaged or destroyed. Along the portion of the path in Blount County, hundreds of trees were snapped or uprooted.

 

 
 Radar Data
Radar Image Radar Image
This is an image of the 0.5 degree reflectivity data from KBMX at 549 am as the circulation was just upstream from Warrior.
Click to enlarge.
This is an image of the 0.5 degree storm relative velocity (SRM) data from KBMX at 549 am as the circulation was just upstream from Warrior. Click to enlarge.
 
Storm Damage Images 

Storm Damage Image
Tree Damage

Storm Damage Image
Roof Damage

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