Weather forecasters weren't yet sure whether a snowstorm was coming, but Somerville, Massachusetts, Mayor Joseph A Curtatone wasn't taking any chances. Though not a flake of snow was in sight, he declared a snow emergency. The next day, citizens of the city awoke to find little snow. But some 3,000 of them found $50 tickets on their cars for parking on a snow emergency street. They were the lucky ones. Another 200 had their cars towed. The mayor says he has no plans to forgive the tickets or to cancel the towing charges, which could net the city some $179,000. Neither the state nor any other city in the area declared a snow emergency.