Nationwide Extreme Weather Week: Heat Dome, Polar Vortex, Blizzard and Atmospheric River

The National Weather Service and other experts are warning that nearly every part of the United States will face some form of extreme weather in the coming days, with a rare overlap of a Southwest heat dome, a polar vortex intrusion into the Midwest and East, back‑to‑back snowstorms over the northern Great Lakes, and days of heavy rain in Hawaii. Forecasters say a strong heat dome will park over the Southwest early next week, pushing Phoenix toward an unprecedented mid‑March stretch of triple‑digit temperatures, including possible highs of 103–107°F that usually don’t arrive until May. At the same time, a southward‑displaced polar vortex will drive lows near 0°F in Minneapolis and single digits in Chicago, with teens and 20s expected across much of the Northeast and Mid‑Atlantic and even 20s possible in Atlanta. Two storm systems will roll across the northern tier and Great Lakes, dumping snow by the foot in some areas, while Hawaii endures a prolonged bout of downpours tied to an atmospheric river. Meteorologists say the country is experiencing intense “weather whiplash,” with many regions swinging rapidly from record warmth to winter conditions, raising concerns about public safety, power demand, and how communities adapt to increasingly volatile extremes.