A radar indicated tornado warning was issued for Story County, specifically Ames and Huxley, at 5:52 a.m. while another was issued for parts of Polk County, including Des Moines, at 6:22 a.m. Sirens went off in Ames around 6 a.

If the operator feels there is sufficient rotation or there is a sign that a storm is capable of producing a tornado, large hail, or damaging winds, they would issue a warning. If they feel it is not strong enough, then no warning is issued, according to Dunn.

Environment Canada has issued a tornado warning for South Central Saskatchewan. Extra care and attention should be exercised in and around the following localities: Aberdeen, Alvena, Wakaw, Vonda, Bruno,

A tornado warning was issued by the National Weather Service in Duluth at 7:17 p.m. on Tuesday, July 15. This warning applies to Ashland, Price and Sawyer counties.

An updated tornado warning was issued by the National Weather Service on Tuesday at 5:52 p.m. in effect until 6:30 p.m. for Bucks, Montgomery and Philadelphia counties.

The National Weather Service has issued a Tornado Warning for Dodge and Fond du Lac Counties until 4 p.m. Northwestern,

This means that instead of receiving a tornado warning just 15 minutes before a storm strikes, residents could get up to two hours’ notice. The technology also allows for more targeted alerts, potentially narrowing warnings from entire regions to just one or two counties.

An updated tornado warning was released by the NWS Raleigh NC on Sunday at 6:58 p.m. in effect until 7:30 p.m. for Alamance and Orange counties.

With storms back in the forecast, it's important to clear up the difference between a tornado watch and a tornado warning.

PM EDT for Cincinnati-Northern Kentucky Airport, Covington, and Florence. Tornado sirens have sounded as severe weather intensifies. A tornado-warned supercell was spotted near CVG Airport. Residents are urged to seek shelter and follow updates from the National Weather Service.