Polar vortex brings blast of cold air, early season lake effect snow. See maps.
A harsh drop in temperatures is being delivered to the eastern two thirds of the U.S. thanks to a polar vortex dipping down from the Arctic.
East Coast bracing for potential nor'easter this weekend
The Interstate-95 corridor should be on alert, from the Delmarva Peninsula up into the Northeast and New England region, forecasters say.
The U.S.'s strongest tornado in 12 years hit North Dakota in June, NWS says
A deadly tornado that ripped through a rural city in North Dakota in June has been upgraded to an EF-5, the National Weather Service said Monday, marking the first twister with an EF-5 rating in 12 years.
Why is the Atlantic so quiet this hurricane season?
This year has been quieter than expected for tropical systems in the Atlantic, making some wonder: Where are all the hurricanes?
A look at the meteorology behind Hurricane Katrina 20 years later
Katrina, one of the deadliest hurricanes on record to hit the United States, first formed as a tropical wave off the coast of Africa.
What is a haboob and what causes the kind of storm that hit Phoenix?
Stunning images show expansive plumes descending on the Phoenix metro area and the city's international airport.
Maps show Southeast heat advisories, air quality alerts in Midwest
A cold front is bringing storms and lower temperatures to parts of the country, while the Midwest sees poor air quality from wildfire smoke.
Maps show another day of extreme temperatures for millions
The extreme heat continues in the Midwest, the Southeast and some parts of the Northeast.
Map shows U.S. heat advisories as heat dome moves east
More than 100 million Americans are under heat alerts as the extreme temperatures that have smothered the Midwest this week arrive on the East Coast.
Heat dome map shows dangerous temperatures across U.S. Corn Belt, South
A heat dome is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service issuing heat alerts from Nebraska to Florida.
Timeline shows when emergency alerts warned of Texas flood disaster
CBS News analysis shows there were 22 warnings sent by the National Weather Service for Kerr County and the Kerrville area, but many residents say they didn't get alerts.
Maps show Canada wildfire smoke forecast for U.S.
Wildfire smoke from Canada is expected to move over the U.S., and maps and satellite imagery show the large-scale impact of the blazes.
How do watches and warnings differ, and which weather alert is worse?
When it comes to severe weather events like tornadoes and flash floods, what's the difference between a watch and warning, and which is worse?
Maps show NOAA's spring weather outlook across U.S.
Much of the country is forecast to see warmer-than-average temperatures and drought conditions this spring, according to NOAA.
Polar vortex set to freeze the U.S. as far as the Deep South
A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.