Sunrise, Mt Rainier
46.9159°, -121.6425°
Best time:6:42 AM
81%
Never miss the perfect foggy morning
Our proprietary model analyzes atmospheric conditions to alert nature photographers when cinematic mist is about to form at your saved locations.
Intelligent Alerts
Get notified up to 72 hours before photogenic fog conditions develop.
Custom Locations
Save your favorite photography spots and monitor conditions at each one.
Predictive Models
Advanced atmospheric analysis for radiation and valley fog prediction.
Nothing transforms an ordinary landscape quite like fog.
That ethereal mist rolling through valleys, turning familiar scenes into something mystical, sublime—if you've caught the fog bug, you know exactly what I mean. We live for those mornings when the atmosphere itself becomes part of the art.
But here's the painful truth: fog remains one of the hardest weather phenomena in meteorology to predict.
How many perfect foggy mornings have you woken up to and wished you'd known ahead of time?
By the time traditional weather apps issue a generic "Dense Fog Advisory," the moment has often passed. They're built for aviation hazards, not photogenic conditions.
Fog science is complicated
Dew Point Depression
Relative Humidity
Temperature
Wind Speed
Wind Gusts
Cloud Cover
Atmospheric Pressure
Visibility
Time of Day
Terrain Type
Seasonal Patterns
Wetness Memory
Temperature Drop
DPD Trend
Cloud Prep Window
Custom variables highlighted in blue
That's why I built Fog-Index.
After countless mornings checking weather apps only to be disappointed, I dove deep into atmospheric science—dew point depression, humidity gradients, wind velocity, wetness memory—and built a proprietary algorithm optimized for what we actually care about: photogenic fog.
This isn't a static model; it's an ongoing process of refinement.
Continuously tweaked against real-world conditions, Fog-Index is the tool I needed as a photographer, and now it's here for you: a reliable, set-it-and-forget-it alert system that unlocks those perfectly mystical mornings.
— James Lorentson
Photographer & Fog-Index Creator