GFS dProg/dT IWV Difference Maps

Plot Description: Difference in Integrated Water Vapor (IWV) from previous GFS Forecasts model runs. Difference in IWV is shown for locations where either GFS model run IWV is greater than or equal to 15 mm. Contours indicate the IWV from the most recent GFS run. Positive values (green-blue) indicate that the most recent GFS is higher than the old GFS run.