The National Weather Service issued a flash flood warning for parts of New Hampshire at 9:01 p.m. Friday.
The warning covered southeastern Merrimack county, southeastern Hillsborough county, and west central Rockingham county. It was set to end at 11 p.m.
Doppler radar and rain gauges indicated heavy rain falling across the warned area, and at least three inches of rain in certain areas, the National Weather Service said in their advisory. Flash flooding had already occurred, they said.
WMUR reported Friday night that Manchester police had called for only emergency traffic across the city, at least until 11 p.m.
The situation appeared less severe in Concord. Police there reported receiving a handful of calls about flooding throughout the city, but had not yet issued any public safety advisories as of 9:50 p.m.
Calls were concentrated around Manchester Street at Airport Road and Centre Street, a Concord police receptionist said.