Red Flag Warning in effect in parts of southern Arizona Red Flag Warning issued for parts of Arizona on Wednesday, April 21, 2021. (Source: National Weather Services via Twitter) By KOLD News 13 Staff | April 21, 2021 at 1:45 PM MST - Updated April 21 at 1:48 PM TUCSON, Ariz. (KOLD News 13) - The National Weather Service issued a Red Flag Warning for the Tucson area and other parts of southern Arizona. That alert went into started at 11 a.m. Wednesday, April 21, and ends at 8 p.m. A Red Flag Warning is in effect today from 11am to 8pm. Be careful with activities that could create a spark! pic.twitter.com/igzU90jfuh— NWS Tucson (@NWSTucson) April 21, 2021