Dense fog shrouds Bay Area valleys one last time as a stubborn weather pattern finally gives way. After three weeks without rain, beneficial showers arrive Tuesday—and meteorologists say a potentially significant atmospheric river could bring heavier precipitation around the holidays.

Chicago faces extreme cold with wind chills down to -25 degrees, prompting an AccuWeather Alert and a Cold Weather Advisory. Warming centers open for those in need.

The National Weather Service in Nashville issued a Cold Weather Advisory for Middle Tennessee, warning of freezing temperatures and wind chills as low as -3°F.

Salt Lake City is set for stable weather, with clear skies and a high of 54°F expected later today, and calm conditions continuing into the workweek. Rain chances increase mid-week with potential rain and snow mix Wednesday night.

Memphis is under a cold weather advisory until noon Sunday, with wind chills as low as zero degrees expected across the region. The NWS advises wearing hats and gloves to prevent frostbite and hypothermia.

Denver is forecast to have stable weather with sunny days and mild temperatures in the mid-60s, and cooler nights around 35 degrees, according to the NWS.

El Paso, TX is expected to experience sunny and clear weather throughout the week with temperatures rising to the 60s, according to the National Weather Service.

Dallas weather forecast predicts a shift from partly sunny skies with a high near 43 and breezy conditions today to warmer temperatures reaching 77 by Saturday, featuring mostly clear to partly cloudy skies and gentle south winds throughout the week.

The National Weather Service forecasts a week of consistent rain for Portland with varying probabilities and wind speeds, with details on the NWS Portland page.

Houston is experiencing a severe cold front with temperatures dropping from near 80 degrees to as low as 34 degrees, accompanied by high winds. The cold snap has triggered a freeze watch for the area.

The NWS in St. Louis warns of extreme cold with advisory for parts of Illinois and Missouri, advising residents to wear hats and gloves due to risks of hypothermia and frostbite.

A cold weather advisory is in effect for New Orleans with brisk conditions, a chance of morning showers, and nighttime clear skies. The week ahead will be a mix of sun and clouds with temperatures rising to the 70s.

NYC residents face snowy conditions, with up to two inches of snow and chilly temperatures forecasted by the National Weather Service; gradual clearing expected later.