NCEP GFS Model : AWIPS 203 (J) Grid. National - Alaska (polar stereographic). Model runs are made at 0, 6, 12, and 18Z, with analysis and forecasts every 6 hours out 5 days. Horizontal = 45 by 39 points, resolution 190.5 km, Polar Stereographic projection. Vertical = 1000 to 100 hPa mandatory pressure levels (10 levels); surface, height above ground, pressure layers.