SEVERE THUNDERSTORM WATCH: in effect for Hampden, Hampshire, Franklin, and Berkshire County until 12 AM. A cold front is approaching western Mass tonight and will bring showers and thunderstorms to the area. The timing for storms will be from 9 pm to 3 am. A few storms could be strong to severe with isolated damaging winds and large hail. An isolated, spin-up tornado cannot be ruled out for the Berkshires.