Thunderstorm Wind in Carroll County, New Hampshire

It was determined that there was a second microburst just northeast of the first, along the path of the mesocyclone. There was no visible damage to the backlands of Cow

Island, so the NWS Storm Damage Survey Team estimates the second microburst began somewhere just north of Barbers Pole channel before Tuftonboro Neck. This microburst was smaller in areal extent but more intense. Another 1,500 trees, again mostly softwood, were estimated to have been snapped or uprooted. These also caused the majority of the damage observed. There were five vehicles damaged, two of which were total losses. In addition, there were five cabins or outbuildings attached to summer camps that were destroyed and at least another twelve that were damaged by falling trees. Near the Sandy Island Dock several people escaped with minor cuts and scrapes when two trees fell through the shelter they were under. In a nearby parking lot a tree fell onto a car causing one minor hand injury in which medical attention was not necessary.

An unseasonably strong mid-level shortwave trough progressed across Northern New England on June 18th. This brought deep layer shear that allowed for high potential storm structure organization into line segments. The forcing combined with deep moisture allowed for robust convection, with bowing line segments transiting across Central and Southern New Hampshire. Convective wind gusts along with a few areas of microburst wind damage brought down 1000s of trees.