4:45 p.m. update: The Tornado Warning has been allowed to expire in Cerro Gordo county.

Tornado Warning
Areas Affected: Cerro Gordo

NWS DesMoines (Central Iowa)
The National Weather Service in Des Moines has issued a

* Tornado Warning for... East central Cerro Gordo County in north central Iowa...

* Until 445 PM CDT.

* At 407 PM CDT, a severe thunderstorm capable of producing a tornado was located near Mason City, moving east at 30 mph. HAZARD...Tornado and hail up to two inches in diameter. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely.

* This dangerous storm will be near... Nora Springs around 420 PM CDT. Other locations impacted by this tornadic thunderstorm include Portland. TORNADO...RADAR INDICATED HAIL...2.00IN

TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.