KOIN 6 Meteorologist Josh Cozart breaks down the latest forecast as the National Weather Service issues a winter storm warning for the Greater Portland Metro area and North Willamette Valley. Subscribe to KOIN 6's YouTube channel: https://www.youtube.com/user/KOINLOCAL6?sub_confirmation=1 Go to KOIN.com for the latest headlines: https://www.koin.com/ Follow us on Twitter: https://twitter.com/KOINNews Follow us on Facebook: https://www.facebook.com/koin6/ Follow us on Instagram: https://www.instagram.com/koin6/