ALERT: FLASH FLOOD WARNING FOR WIRT, ROANE AND CALHOUN 5:34 PM MONDAY - Flash Flood Warning Through Tuesday Evening (07/13/2015) The National Weather Service in Charleston West Virginia has issued a Flash Flood Warning for north central Roane County in West Virginia... Wirt County in West Virginia... northwestern Calhoun County in West Virginia. Flash Flood Watch in effect through Tuesday evening.