The Pacific Meridional Mode is officially negative for the first time since 2013. This can have a big impact on the sub-tropical jet and influence the summer pattern. This typically correlates to drier risks in the Central Plains in Summer. #KSwx #OKwx #ILwx #MOwx #IAwx #AGwx pic.twitter.com/wWHokI8OWY

— Bret Walts (@BretWaltsWx) March 2, 2021