I find the Natl Weather Service (NOAA), in general, to be more accurate than Mountain Forecast. You can get the forecast for the summit and Whitney Portal by typing the location into the search bar on upper left. You can also click on topo map on lower right.

https://forecast.weather.gov/MapClick.php?lat=36.5786&lon=-118.2924#.XTih4XdFyUk

Last edited by Kascadia; 07/24/19 11:26 AM.