The National Weather Service in Gray Maine has issued a * Snow Squall Warning for... Rockingham County in southern New Hampshire... Hillsborough County in southern New Hampshire... Southeastern Belknap County in central New Hampshire... Southeastern Merrimack County in central New Hampshire... * Until 400 PM EST. * At 255 PM EST, a dangerous snow squall was located along a line extending from near Deering to near Lyndeborough to near New Ipswich to 23 miles south of Fitzwilliam, moving northeast at 45 mph. HAZARD...Flash freeze on roads. Whiteout conditions with near zero visibility associated with intense bursts of heavy snow and gusty winds leading to blowing snow. Wind gusts greater than 35 mph. SOURCE...Radar indicated. IMPACT...Dangerous and life-threatening travel conditions are expected to develop rapidly in the warning area. This includes the following highways... Interstate 293 between mile markers 1 and 11. Interstate 89 between mile markers 0 and 8. Interstate 93 between mile markers 0 and 42. Locations impacted include... Manchester, Nashua, Concord, Derry, Exeter, Merrimack, Salem, Northwood, Bedford, Milford, Hooksett, Amherst, Litchfield, Hollis, Epping, Hopkinton, New Boston, Loudon, Epsom, and Brentwood. PRECAUTIONARY/PREPAREDNESS ACTIONS... Wet roadways will quickly freeze. Black ice will cause roads, bridges, and overpasses to become slick and dangerous. Slow down and be prepared for a sudden loss of traction. If traveling on a highway, find the nearest exit or rest area and park safely away from traffic. Allow snow squalls to pass before attempting to resume travel. SNOW SQUALL...RADAR INDICATED SNOW SQUALL IMPACT...SIGNIFICANT