You don’t need a winter jacket this morning with temperatures starting in the 50s. But cold air moving in this afternoon will cause temperatures to tumble into the 30s by dinnertime. The cool air will be accompanied by some clearing in the wake of a strong cold front. Fog, clouds and morning showers will give way to partial sunshine this afternoon. A storm passing well to the south and east of Connecticut may graze us with a little light rain or snow late tonight into early tomorrow.