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

7.3K views · 85 reactions | GFS weather model showing very good rainfall over the country from Monday up until at least Thursday. Expect heavy rainfall over some part especially over the Free State and the Eastern Cape. Stay safe! | Storm Report SA | Facebook

The GFS Model out through 240 hours shows one solution to the evolution of the two low pressure systems that will impact the state over the next several days. The blue/purple color represents higher moisture, while the orange/red color indicates drier air. | US National Weather Service Tucson Arizona