A strong cold front was dropping south through the region on the morning of July 17th. Ahead of the front was a very hot and humid air mass with precipitable water values approaching 2 inches.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GYX wrote it up.
A strong cold front was dropping south through the region on the morning of July 17th. Ahead of the front was a very hot and humid air mass with precipitable water values approaching 2 inches. Several severe thunderstorms developed and caused numerous reports of wind damage.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before the first event at Jul 17, 8:03 AM EST, 1 hour 7 minutes earlier.
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</html>The Boston radar (KBOX), 156 km away, was scanning. The volume nearest the first event began at 14:09 UTC.
7 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm downed trees and wires at the junction of Route 10 and Route 123 in Marlow.
A severe thunderstorm downed power lines in Washington.
A severe thunderstorm downed power lines in Dunbarton.
A severe thunderstorm downed power lines on Old Turnpike Road in Salisbury.
A severe thunderstorm downed a tree on a car at Elm and Clark Street and another tree on power lines on North Bay Street in Manchester.
A severe thunderstorm downed tree limbs on the corner of Elm and Carpenter Streets in Manchester.
A severe thunderstorm downed trees on wires on NH Route 107 in Deerfield.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Hampshire in 2018Every state in 2018This day in weather historyWarnings in New Hampshire, July 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 774472, 774474, 774476, 774478, 774490, 774495, 774483.