A series of weather alerts have been issued across California, Arizona, and the broader southwestern US due to dropping temperatures and winter weather conditions. A Freeze Watch is in effect for California's Antelope Valley and parts of Arizona's northwest desert, with temperatures potentially falling as low as 25°F, posing risks to crops, plants, and unprotected plumbing. The National Weather Service warns of gusty winds up to 45 mph, which could cause power outages and damage from falling tree limbs. Along California’s coast, a Frost Advisory remains in effect until Tuesday morning, with lows around 36°F, and a risk of sneaker waves that can unexpectedly surge onto beaches, especially along the coasts of Humboldt, Mendocino, Del Norte, and other areas, threatening beachgoers and debris being pulled into the surf. The weather conditions are part of a broader winter storm affecting much of the US, with snow forecasted from the Rockies into the Midwest and potential winter storms in the Appalachians and New England. Residents are advised to take precautions to protect their property, pets, and vulnerable vegetation, and to stay updated with the National Weather Service for further warnings.