Severe thunderstorms are expected to smack 12 states in the Midwest and South over the weekend, with some tornadoes possible.

CNN is tracking extreme heat conditions for Americans each day. See where the risks are greatest — and where high temperature records might be broken.

Daily and monthly temperature records could be broken later this week in parts of the western and central U.S.

The National Weather Service has confirmed several EF4-strength tornadoes in outbreaks of severe weather this month, the most ...

The 12 hour Surface Analysis map shows current weather conditions ... with its use finally spreading to the United States during World War II. Surface weather analyses have special symbols ...

The National Oceanic and Atmospheric Administration predicted a much stronger northern lights display than usual Saturday ...

There is a threat of tornadoes at night, so residents in at-risk areas are advised to set their phones to receive loud weather warnings which will wake them up.

Thousands of power outages were reported Saturday as a deadly severe weather outbreak moved across the Midwest and South.

Partly cloudy with a high of 76 °F (24.4 °C). Winds SSW at 11 to 12 mph (17.7 to 19.3 kph). Night - Partly cloudy. Winds SSW at 7 to 11 mph (11.3 to 17.7 kph). The overnight low will be 58 °F ...

The 12 hour Surface Analysis map shows current weather conditions ... with its use finally spreading to the United States during World War II. Surface weather analyses have special symbols ...