New Hampshire Tornado Warnings by County 10 counties · live NWS tornado warnings · history & climatology since 1950 Counties Belknap County NH Carroll County NH Cheshire County NH Coos County NH Grafton County NH Hillsborough County NH Merrimack County NH Rockingham County NH Strafford County NH Sullivan County NH More for New Hampshire New Hampshire tornado history FEMA disaster declarations in New Hampshire Get real-time tornado alerts for New Hampshire Vortex monitors NWS warnings, SPC outlooks, and live radar — with push + phone call alerts when storms threaten your location. Open the Vortex app →