What the app shows you
Full FogCast score, fog type, chase-or-skip verdict, and 10-day outlook — all in the app.
Get LightCast Suite on iOS
Know before you drive: FogCast checks the conditions that produce photogenic fog
Get more than a snapshot of current conditions. The LightCast app unlocks everything to plan ahead
Humidity alone isn't enough. Wind alone isn't enough. Cloud cover alone isn't enough. Photogenic valley fog requires several conditions to line up at once, and most weather apps don't read them together.
Set a FogCast threshold once. The app will alert you when conditions at your saved locations look promising, so you're not manually checking at 4am.
Don't waste a sunrise drive. Check FogCast before you leave.
Download on the App StoreJasper National Park is the largest national park in the Canadian Rockies and its wide mountain valleys produce excellent radiation fog conditions in fall and early winter. The Athabasca River valley floor sits lower than much of the surrounding terrain, and cold dense air pools here overnight, producing morning fog that moves through the valley with the light wind.
Pyramid Lake and Patricia Lake near the townsite are classic fog photography subjects, with the mirror-calm water reflecting the mountain backdrop through the mist at dawn. The Athabasca Falls area and the Icefields Parkway corridor heading south toward the Columbia Icefield offer wide valley compositions when fog fills the floor. Maligne Lake, 48 kilometers from the townsite, is one of the most atmospheric fog locations in the Rockies.
Fall is the best season, from mid-September through October, before heavy snow closes higher terrain. Early morning in the valley is the most reliable window. Jasper sits further north than Banff, so overnight temperatures drop earlier in the season and fog is common from late August onward.