The National Weather Service in Jacksonville issues a freeze warning and cold weather advisory until 9 AM EST Monday, advising residents to protect against hypothermia and frostbite.

Oklahoma City experienced a possibility of morning flurries on MLK Day, but is set to see clearer and warmer weather throughout the week with a mix of sunny days and chilly nights, before a wintry forecast returns by the weekend.

Raleigh faces black ice risks and a potential winter storm; residents advised to be cautious on icy roads and prepare for severe cold and snow chances this weekend.

Miami experienced a chilly Monday, with temperatures in the upper 40s and wind chill in the low 40s. A gradual warming trend is expected, with milder conditions by Tuesday.

Knoxville's weather features a chilly 27°F with a light wind, with sunny skies expected for MLK Day and a high of 38°F. The week includes sunshine, possible midweek showers, and a chance of weekend rain and snow.

Pittsburgh is expecting a snowy start to the week with potential travel hazards and extreme cold. Wind Advisories are in effect, with plunging temperatures and dangerous wind chills forecasted.

St. Louis faces a cold week start with a weather advisory due to low temperatures and wind chills. The National Weather Service predicts sunny, but brisk conditions with a gradual warming trend.

Freeze warning and cold advisory for East Central Florida until 9 AM, affecting several counties. Authorities advise caution when using space heaters and recommend dressing warmly. Dry conditions are expected to continue, with a gradual warm-up anticipated.

Philadelphia's MLK Day celebrations were met with mostly sunny but cold forecasts, as the NWS predicted consistent chilly temperatures and possible light snow towards the week's end.

Boston celebrated MLK Day with light morning snow, followed by possible slick roads, and is expecting a sharp temperature drop with more cold and potential flurries ahead.

Baltimore is bracing for extremely cold temperatures and potentially significant winter storm this weekend, with residents advised to prepare for harsh conditions.

The NWS has issued a cold weather advisory for southeastern Indiana, southern Ohio, and northern Kentucky, warning of extreme cold and potential snowfall.

Memphis weather forecast includes sun, potential snow, and varied precipitation over the next week with fluctuating temperatures and chances of rain and freezing rain.