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River Fog Forecast Tadami River / Aizu area — research pilot

Today's river fog forecast

A 3-level likelihood of river fog for each daytime hour (sunrise to sunset) at 63 sites in the Tadami River / Aizu area.

Computed 11/01 19:30updated dailyLatest observation 11/01 19:00updated hourly

Forecast summary

    The “Current” column is an AI classification of the river camera image as of 2026/11/01 19:00, not a forecast. Sites classified as having river fog are highlighted. For sites where the latest image could not be obtained, the most recent observation within the last 3 hours is shown with its time.

    Map

    Likelihood: High Likelihood: Medium Likelihood: Low Nighttime (not forecast)

    Likelihood by hour

    Darker = higher likelihood. Blank cells are nighttime, when camera images cannot be classified and forecasting is excluded. Hover over a site name to show it on the map.The 3-level forecast scale

    Conditions where river fog is more likely

    Share of observations (camera image classifications, 63,233 total) with river fog, since June 2025. The overall average is 3.1%.

    Time of day

    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18

    The highest shares were at 5・6・18:00 (hour of day). Nighttime is excluded since it cannot be classified.

    Humidity

    • under 80%1.1%
    • 80–90%4.3%
    • 90–95%6.4%
    • 95% or more5.6%

    Wind speed

    • 2m/s or more1.1%
    • 1–2m/s2.6%
    • 0.5–1m/s4.4%
    • under 0.5m/s5.5%

    Temperature − dew point (smaller = more humid air)

    • 4℃ or more1.1%
    • 2–4℃3.6%
    • 1–2℃6.6%
    • under 1℃5.5%

    Sites where it's more common

    1. 七入橋19.7%
    2. 大宮橋18.3%
    3. 赤岩橋17.5%
    4. 三島大橋16.9%
    5. 早戸大橋13.0%

    River fog tends to be more common when humidity is high, wind is weak, and the gap between temperature and dew point is small (air close to saturation). Observations are AI classifications of camera images and may contain errors.