Plot Description: This page displays several versions of a combined IVT, AR, and AR Scale figure for the NCEP GFS forecast initialized at 00 UTC each day. Vertically Integrated Water Vapor Transport (IVT) is shaded with magnitude in units of kg m-1 s-1. Atmospheric Rivers (ARs) identified by the Tracking Atmospheric Rivers Globally as Elongated Targets (tARget) AR detection algorithm by Guan and Waliser are outlined in black. A modified version of tARget (tARget NP) that removes the net poleward transport requirement is also shown, where gray outlines indicate AR shapes that differ from the original tARget output. AR scale values are shown as colored dots on the map at every fourth lat/lon grid point. The Modified AR Scale is an experimental version of the AR Scale that treats values from the original AR Scale the same while adding in lower IVT events that would be identified using the Enhanced AR Scale. The figures on this page are experimental and subject to change, they are provided “as is” and are intended for research purposes only (disclaimer).