NOAA's powerful Global Forecast System model was upgraded today, providing forecasters with a more accurate 4-D picture of how a weather system will evolve. The upgrade is the latest of a number of model improvements rolling out this spring and summer, thanks to increased supercomputing power NOAA acquired earlier this year. More information on the May 11, 2016 GFS upgrade here: http://www.noaa.gov/noaa’s-premier-forecast-model-goes-four-dimensional Video Credit: NOAA | U.S. National Weather Ser

Shown here is the latest animation of WPC forecast charts for the U.S. for the next 7 days. Tropical moisture riding up along and over a frontal boundary has resulted in widespread heavy rainfall across the eastern U.S. during the past couple of days. WPC has initiated Storm Summary for this heavy rain event. The front is forecast to become nearly stationary across the Mid-Atlantic and into the southeastern U.S. during the next few days where a large-scale upper-level low is forecast to form. Mo