Just my opinion, but the activity you are describing may have something to do with your up-coming Primary election this Tuesday.
Nashua city clerk expects 65 percent voter turnout for primary
http://www.unionleader.com/article/20160208/NEWS0605/160209131
NASHUA — About 33,000 Gate City residents are expected to hit the polls Tuesday for New Hampshire’sd the first-in-the-nation presidential primary, with an estimated 2,000 people registering as new voters, the city clerk estimates.“ We are looking at a 65 percent turnout, but it is hard so say. Of course, it depends on the snow,” City Clerk Patricia Piecuch said. Additional police officers have been hired to assist with the anticipated crowds and to help ensure traffic flows smoothly in and out of the city’s nine polling sites.
Plus, you have all these Candidates "in Town" which means - extra security.
http://www.unionleader.com/who-is-in-NH-campaigning
Add a storm advisory for your area - beginning Monday and into Tuesday for the Primary voting:
Snow begins to set in across state; up to 8 inches possible
http://www.wmur.com/weather/stormwatch/snow-expected-to-set-in-monday-afternoon-up-to-8-inches-possible/37875598
MANCHESTER, N.H. —A nor'easter began bringing snow to New Hampshire on Monday afternoon. Up to 8 inches of snow is possible in some southeastern areas.
A winter weather advisory is in effect for most of the Granite State, while a winter storm warning has been activated for coastal Rockingham County.
Highs will be in the 20s but will feel colder with winds gusting around 25 mph.
The majority of New Hampshire will see 3 to 5 inches of snowfall, but southeastern most communities along the coast could see 5 to 8 inches, and northwestern areas could see lesser amounts of 1 to 3 inches.
A coastal flood warning was put in place for noon Monday, and minor flooding was reported.
