Hourly Weather - San Juan (PR), Puerto Rico

Sign up for the Morning Brief email newsletterto get weekday updates from The Weather Channel and our meteorologists. With nearly 50 million Americans under some kind of winter weather alert ahead of , followed by a potentially record-setting blast of arctic air, now is the time to prepare for potential power and heat outages. Gerri is expected to spread snow, rain, high winds and severe weather across the country. Weather.com senior meteorologist Jonathan Erdman warns, “The concern is when that...