The Rapid Refresh (RAP) model uses a rapid-refresh version of the WRF model. Therefore, the images generated by the NAM/WRF model can be compared with the images of the RAP model. The RAP model covers North America and is updated every hour. The model has a 13 km horizontal resolution with 50 vertical levels. The grid is projected onto a rotated lat-lon grid, with a 759x567 mass-point domain (Arakawa grid). The model uses 1/12-deg NCEP sea-surface temperatures. The web site images are updated every hour.
RAP 4 Panel Forecasts
These 4 panel charts displays the conditions at 4 forecast times for a particular plot type. The upper left panel is the 1 hour forecast, the upper right is the 3 hour forecast, the lower left is the 5 hour forecast and the lower right is the 7 hour forecast.
These images are generated by geostationary satellites orbiting 22,000 miles above the equator looking at the United States. These include visible, infrared and water vapor images. The images are updated once an hour at about 30 after the hour.