The U.S. National Weather Service has issued a tornado warning for parts of Northern California. The NWS told people to "take shelter now." Video above from Scotts Valley tornado. The warning was ...

The National Weather Service in Tallahassee has issued ... overnight to receive weather alerts in case a tornado warning is issued. The storms have already proven deadly as they tore through ...

The National Weather Service's Los Angeles page screams “Particularly Dangerous Situation (PDS)” in hot pink letters against ...

including a tornado warning have been issued for parts of the Upstate on Sunday. According to the National Weather Service, a tornado watch has been issued until 1 p.m. for the area, and a tornado ...

Jackson and much of Central Mississippi is under a severe weather threat Saturday evening, according to the National Weather Service ... The NWS issued tornado warnings at 6:30 p.m. for ...

Athens was under a severe thunderstorm warning Dec. 28 when a brief tornado struck downtown, causing heavy damage.

Tornado warnings are usually issued for a duration of about 30 minutes.TORNADO WATCH:A tornado watch is issued by the National Weather Service when conditions are favorable for the development of ...

For example, the tornado warning might have first been issued based on radar alone. Shortly thereafter, the National Weather Service (NWS) might receive credible information that a tornado has ...