Mt. Whitney Day Forecast: Odds of an Opening
Your odds of catching a Mt. Whitney Day availability opening in the window ahead — a band grounded in 3 weeks of our own scan history, not a guess.
PermitCast forecast
Odds of an opening for Mt. Whitney Day
The odds that our scanner catches at least one availability opening for this permit in the window ahead — based on how often it actually has, not a guess.
Next 7 days
Moderate chance
Next 14 days
Moderate chance
Based on 3 weeks of our scan history. Forecast last updated Aug 30, 2026.
Mt. Whitney Day forecast questions
What are the odds of catching a Mt. Whitney Day opening?
Right now our forecast puts the next 30 days at a moderate chance of catching at least one availability opening for Mt. Whitney Day, based on 3 weeks of our own scan history. It's a band, not a promise — read how we calculate it on the methodology page.
How is the Mt. Whitney Day forecast calculated?
We split our scan history into non-overlapping windows and measure how often at least one opening was actually detected, then shrink that rate toward a pooled prior so a short history can't overstate its confidence. No lottery data, no guessing — just what our scanner has seen. Full math on /forecasts.
Is this a guarantee that Mt. Whitney Day will open up?
No. It's a banded probability from historical scan data, not a prediction of a specific date and not a guarantee. Set a watch and we'll alert you the moment a real opening is detected.