In my experience, NOAA has the most accurate forecasts. I’ve listed some other sources below.
NOAA
- Summit (Shown by default below, subtract 5-10° d/t elev)
- Trail Camp
- Lone Pine Lake
- Whitney Portal
- Lone Pine
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395 Travel’s Daily Weather Forecasts
Posted Daily on the WhitneyZone Forums: http://www.whitneyzone.com/wz/ubbthreads.php/topics/44730/Current_WEATHER_FORECAST_by_DM#Post44730
Mountain Forecast
I’ve found that this websites forecasts tend be extreme, particularly when it comes to snowfall estimates.