Flash Flood Warning until 09:30PM Monday 
The National Weather Service in Gray has issued a
* Flash Flood Warning for... Southeastern Hillsborough County in southern New Hampshire... Southwestern Rockingham County in southern New Hampshire...
* Until 930 PM EDT.
* At 617 PM EDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 1 to 3 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include... Nashua, Derry, Merrimack, Salem, Amherst, Litchfield, Hollis and Mason. This includes Interstate 93 between mile markers 6 and 14.
* AFFECTED AREAS: HILLSBOROUGH, NH ... ROCKINGHAM, NH
Instructions:
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.
Address/Location
Merrimack Police Department
31 Baboosic Lake Rd
Merrimack, NH 03054
Contact
Emergency: 9-1-1
Non-emergencies: 603-424-3774