A warm front lifted north through the region during the day on the 19th of July, leaving the forecast area in a very hot and humid air mass. Thunderstorms riding over an upper level ridge along this boundary developed during the late afternoon across eastern Ontario and southern Quebec.
Every event with a place to put it. Tap one for its entry below.
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 warm front lifted north through the region during the day on the 19th of July, leaving the forecast area in a very hot and humid air mass. Thunderstorms riding over an upper level ridge along this boundary developed during the late afternoon across eastern Ontario and southern Quebec. These storm intensified as they dropped southeast through the evening hours. Damage from these storms was exclusively due to strong winds.
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 19, 6:00 PM EST, 30 minutes earlier.
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</html>The Portland,ME radar (KGYX), 128 km away, was scanning. The volume nearest the first event began at 23:28 UTC.
11 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm downed numerous trees along Route 3 from Groveton into Colebrook and further north into Pittsburg.
A severe thunderstorm downed multiple trees in Northumberland, one of which fell through a house.
A severe thunderstorm downed multiple trees throughout Lancaster.
A severe thunderstorm downed trees in Bethlehem.
A severe thunderstorm downed large branches on wires in Warren.
A severe thunderstorm downed trees and wires in Claremont.
A severe thunderstorm downed trees in Unity.
A severe thunderstorm downed trees and power lines in Claremont.
A severe thunderstorm downed a large tree and several large branches in Henniker.
A severe thunderstorm downed numerous trees throughout Concord.
A severe thunderstorm downed trees and wires in Wakefield.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Hampshire in 2013Every state in 2013This day in weather historyWarnings in New Hampshire, July 2013
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 2026-10-01. Each event’s entry at NCEI: 469460, 469459, 469468, 469463, 469464, 469467, 469478, 469474, 469481, 469475, 469480.