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Microburst /Straight Line Wind Damage/ Confirmed near Franklin Springs in Oneida County New York

  • Location: Franklin Springs in Oneida County New York
  • Date: July 26, 2011
  • Estimated time: 12:55 to 1:04 PM EDT
  • Estimated maximum wind speed: 90 mph
  • Maximum path width: 1600 yards or 0.9 miles
  • Path length: 5.5 miles
  • Beginning lat/lon: 43.04n / 75.42w
  • Ending lat/lon: 43.02n / 75.31w
  • Fatalities: 0
  • Finjuries: 0

Summary

The path of damage began on Reservoir Road, in the town of Kirkland, where two trees were downed. The path continued eastward across Harding road, or State Route 233, where numerous additional trees were snapped or uprooted. These first two locations exhibited damage consistent with winds of 70-80 mph.

Farther east in Franklin Springs, the damage intensified on Furnace Street, just west of State Route 12b. One to two dozen trees were downed, including a large healthy black walnut tree snapped just above the base. Several of the trees were down on houses. The damage at this location was consistent with winds around 90 mph.

The damage path continued eastward across Route 12b, where several more trees were snapped or uprooted between Siedsma Court and Grant Road. The damage at these locations were consistent with winds of 80-90 mph.

Farther east across Grant Road, a large wood pole was snapped at South Street. At this point, damage was consistent with winds around 90 mph.

The storm continued eastward across Fountain Street and Craig Road, where one tree was uprooted, but mostly larger branches were downed. Damage at these locations were consistent with winds around 70 mph.

The storm continued eastward across State Route 12, between County Route 13 and Burmaster Road, where part of a tin roof was peeled off a barn. Minor tree damage was also observed. Damage at this location was consistent with winds of 60-70 mph.

The storm then tracked east-southeastward into the town of Paris, near the intersection of Grange Hill and Snowden Hill roads. A wood pole was snapped near the top. Some residential shingle damage was noted, along with minor tree damage. Damage at this location was consistent with winds of 70-80 mph.

The storm appeared to weaken thereafter, with just sporadic minor damage on Oneida Street, between Chadwicks and Sauquoit.

All of the damage along this path was pointed towards the east. This pattern would be consistent with microburst or straight line winds.

For reference:

A microburst is a convective downdraft with an affected outflow area of less than 2 1/2 miles wide and peak winds lasting less than 5 minutes. Microbursts may induce dangerous horizontal/vertical wind shears, which can adversely affect aircraft performance and cause property damage. Straight-line winds are generally any wind that is not associated with rotation, used mainly to differentiate them from tornadic winds.

The information in this statement is preliminary and subject to change pending final review of the event(s) and publication in National Weather Service Storm Data.

Heden/Jurewicz/Humphrey

Photos:

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Page last modified: July 27, 2011