Is it dangerous to leave snow on the top of your your car? The answer is YES! Snow and ice are very heavy and when it falls off a vehicle, it can become airborne. Ice and snow can hit oncoming cars and easily shatter windshields, injuring people inside. If California Highway Patrol (CHP) finds a vehicle with excess ice and snow on it, the driver can be cited for the hazard. Be safe out there and avoid getting a ticket!