Millions of people in the United States will experience abrupt changes in temperature during the week, with differences of up to 30 degrees between one day and the next.

On Monday, cities like Chicago and Kansas City will record temperatures close to 80 degrees Fahrenheit, 10 to 15 degrees above the seasonal average.

In contrast, areas like Los Angeles and the California Bay area will remain below normal, with highs in the 60 degrees.

Sharp descent and severe storms

For Tuesday, a significant drop in temperatures is forecasted in the Midwest. In Denver, the drop could reach 30 degrees, while in Chicago a lower of at least 20 degrees.

That same day, severe storms could affect regions from Dallas to Arkansas, with risks of hail, damaging winds,and tortor isolated swims. On Wednesday, the system will move eastward, impacting areas such as Alabama with possible flash flooding.

The Colorado Rocky Mountains could receive between one and two feet of snow due to a late winter storm that will extend into Wednesday.

The Denver metropolitan area could accumulate between 3 and 9 inches of snow, amid active weather alerts also in Wyoming.

Warming in the south and cooling in the east

As the week progresses, the cold air will expand towards the east and the south, while the west will record higher-than-normal-temperatures. Cities like Phoe nix and Las Vegas could reach close 100 degrees, while in New York City and Washington D.C. much lower highs are expected toward the end of the week.

In parallel, a rare dust warning has been issued in Illinois, including the Chicago area. Visibility could be reduced to less than a quarter-mile in agricultural areas.

This is only the second time that the National Meteorological Service issues this type of alert in the region, after a similar event recorded in 2025.