The survey of the NWS Office in Burlington Vermont has prepared a map showing the damage path associated with the July 18 storm. Lighter shading indicates damage consistent with winds in excess of 50 to 60 mph, whereas darker shading indicates damage consitent with winds between 70 and 90 mph with possible gusts up to 100 mph. The yellow "T" mark the position of possible EF0 and EF1 tornado damage along North Cambridge Road and Highway 108, respectively. The damage path runs 6-7 miles long. The worst damage occured in the hollows and valleys running perpendicular to the storms path. This implies strongly that topography had a significant impact on the dynamics of the storm.
Saturday, August 2, 2008
Storm track and topography
The survey of the NWS Office in Burlington Vermont has prepared a map showing the damage path associated with the July 18 storm. Lighter shading indicates damage consistent with winds in excess of 50 to 60 mph, whereas darker shading indicates damage consitent with winds between 70 and 90 mph with possible gusts up to 100 mph. The yellow "T" mark the position of possible EF0 and EF1 tornado damage along North Cambridge Road and Highway 108, respectively. The damage path runs 6-7 miles long. The worst damage occured in the hollows and valleys running perpendicular to the storms path. This implies strongly that topography had a significant impact on the dynamics of the storm.
Friday, August 1, 2008
Locator Map
On Wednesday 30 July 2008, I visited the vicinity of the Beaudoin Farm along Highway 108, as well as the site of wind damage along North Cambridge road. The Google Earth depiction below shows the terrain features of the site as viewed from the north, including the Beaudoin farm and location on North Cambridge Rd. where the video of the storm was recorded through an east facing window (facing left on the image) . Both locations are in north-south valleys separated by a ridge that rises 140-270' (40-80m) above valley floors.
Introduction and References
On July 18, 2008, a severe thunderstorm with estimated winds in excess of 100 mph (160 km/hr) touched down in North Cambridge, Vermont. It uprooted and snapped numerous trees and caused extensive damage to a small farm along Highway 108.
Eyewitness accounts indicate that high winds lasted about 5 minutes and were characterized by strong southerly winds followed by an abrupt shift of damaging winds to the northwest. The wind shift was documented in cell phone video.
On July 28, 2008 the National Weather Service, after field investigations declared that and EF1 tornado touched down twice between 3:27 and 3:35 PM EDT (19:27 and 19:35 UTC) and on July 18th as its path crossed North Cambridge Road and Highway 108.
View Larger Map
Power Point Presentation
Storm overview
Local News Reports:
WPTZ (NBC)
Eyewitness accounts indicate that high winds lasted about 5 minutes and were characterized by strong southerly winds followed by an abrupt shift of damaging winds to the northwest. The wind shift was documented in cell phone video.
On July 28, 2008 the National Weather Service, after field investigations declared that and EF1 tornado touched down twice between 3:27 and 3:35 PM EDT (19:27 and 19:35 UTC) and on July 18th as its path crossed North Cambridge Road and Highway 108.
View Larger Map
Power Point Presentation
Storm overview
Local News Reports:
WPTZ (NBC)
National Weather Service
Storm Prediction Center Summary
Storm Report from Burlinton, VT
Storm Prediction Center
Convective Outlook
Mesoscale Discussion (18UTC)
Mesoscale Discussion Graphic (18UTC)
COMET Modules
Barrier Jets
Gap flows
Storm Prediction Center Summary
Storm Report from Burlinton, VT
Storm Prediction Center
Convective Outlook
Mesoscale Discussion (18UTC)
Mesoscale Discussion Graphic (18UTC)
COMET Modules
Barrier Jets
Gap flows
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