The National Weather Service in Gray Maine has issued a * Snow Squall Warning for... York County in southwestern Maine... Southwestern Oxford County in western Maine... Southwestern Cumberland County in southwestern Maine... Rockingham County in southern New Hampshire... Strafford County in central New Hampshire... Southeastern Belknap County in central New Hampshire... Eastern Merrimack County in central New Hampshire... Southeastern Carroll County in northern New Hampshire... * Until 500 PM EST. * At 357 PM EST, a dangerous snow squall was located along a line extending from 6 miles north of Ossipee to 11 miles southeast of Salem, moving east at 45 mph. HAZARD...Intense bursts of heavy snow. Gusty winds leading to blowing snow and visibility rapidly falling to less than one-quarter mile. Wind gusts greater than 35 mph. SOURCE...Radar and trained spotter. IMPACT...Travel will become difficult and potentially dangerous within minutes. This includes the following highways... Interstate 93 near mile marker 0. Interstate 95 between mile markers 1 and 43. Interstate 95 in New Hampshire between mile markers 0 and 16. Locations impacted include... Derry, Rochester, South Portland, Biddeford, Portsmouth, Westbrook, Hampton, Durham, Exeter, Conway, Kittery, Bridgton, Alfred, Sanford, Naples, Salem, Ossipee, Northwood, Moultonborough, and Dover. PRECAUTIONARY/PREPAREDNESS ACTIONS... There is no safe place on a highway when a snow squall hits. Visibility and traction are immediately lost in whiteout conditions, making it difficult or impossible to slow down and avoid stopped vehicles. Delay travel or safely exit the highway before the snow squall arrives. SNOW SQUALL...OBSERVED