FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT MONDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...In New Jersey, Mercer, Northwestern Burlington and Southeastern Burlington. In Pennsylvania, Berks, Western Montgomery and Lower Bucks. * WHEN...From midnight tonight to 9 AM EDT Monday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold