Sunrise, Mt Rainier
6,401 ft ASL5:45 AM - 8:12 AM
Valley Fog
81%
1.2°F96%2 mph8.5 mi
Fog cues
Cinematic layering1,033 ft ASLAbove fog
Conditions
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Tomorrow.ioICON fogNWS
Updated 1:42 AM PDT · refresh recommended · Next 12:00 PM PDT
Never miss the fog
Fog-Index alerts you up to 7 days ahead when photogenic fog is likely at your favorite spots, so you can chase the atmosphere, not the forecast.
Intelligent Alerts
Get notified up to 7 days in advance when fog conditions are developing at your locations.
Saved Alert Spots
Save up to 15 of your favorite photography spots and monitor conditions at each one.
Predictive Models
Dedicated pathways for radiation fog and transport fog (marine, inland advection, and upslope) tuned to terrain and coastal context.
Nothing transforms a landscape like fog.
It turns the mundane into the mystical. If you're anything like me, you live for those mornings when the atmosphere is the art.
How many perfect foggy mornings have you missed?
Fog is complex and hard to predict
Fog formation depends on the delicate interplay of dozens of atmospheric variables. Small shifts in temperature, humidity, wind, or pressure can mean the difference between a mystical morning and a clear sky.
Dew Point Depression
Relative Humidity
Temperature
Wind Speed
Wind Gusts
Cloud Cover
Atmospheric Pressure
Visibility
Time of Day
Terrain Type
Seasonal Patterns
Night Wind
Wetness Memory
Temperature Drop
DPD Trend
Cloud Prep Window
Air-Sea Delta
Onshore Flow
Fallback Climatology
Inland Penalty Guardrail
Powered by
Open-MeteoICON Model
Tomorrow.ioFog Detection
NWS / NOAAFog Advisories
Custom fog scoring algorithms
Radiation FogClear-sky radiative cooling
Valley FogTerrain-driven cold air pooling
Transport FogMarine, inland advection, and upslope transport/lift patterns
Custom variables and algorithms highlighted in blue
Existing solutions don't cut it
Despite living in a golden age of data, photographers still miss the best atmosphere. Why? Because standard tools aren't built for us.
General Weather Apps | The NWS & Aviation | Niche Sunrise/Sunset Tools | |
|---|---|---|---|
| Examples | Accuweather, Windy | NOAA, National Weather Service | Skyfire, Escaype |
| Focus | Global Data Visualization | Transport Safety | Golden Hour Color |
| The Flaw | “Pull” based with no dedicated fog detection. They have the raw data, but require you to manually open the app, navigate to each location, and interpret 5-7 variables every single day. | Optimized for hazardous, zero-visibility conditions, not photogenic mist. By the time a “Dense Fog Advisory” appears, it's often too late and too widespread for a specific valley shot. | Groundbreaking for predicting color, but they don't forecast fog. More importantly, they lack proactive alerting, requiring daily manual checks. |
| The Result | ✗You spend time checking apps instead of shooting | ✗You miss the nuanced, photogenic conditions | ✗You miss misty mornings without colorful sunrises |
That's why I built Fog-Index.
After years of checking weather apps every morning only to arrive too late or not at all, I went deep into atmospheric science and built a scoring engine optimized for the one thing we actually care about: photogenic fog.
Multiple scoring pathways — radiation plus transport (marine, inland advection, and upslope) — pull from industry-leading weather APIs to crunch over 15 atmospheric metrics into a single fog probability score. The result is not just a score, but planning context that separates surface fog density, fog height, and sky above so you can decide whether to shoot in the soup or climb out of it.
— James Lorentson
Photographer & Fog-Index Creator
Ready to stop missing foggy mornings?
Join other fog-loving nature photographers and cinematographers who trust Fog-Index to alert them when conditions align.
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