San Francisco Fog

A client of mine wanted a fog extent map for the SF Bay Area.  I searched and searched, but couldn’t find any vector data, so I created one from sifting through more than 1,600 satellite images taken over the past month, finding the ONE image that showed the furthest extent of fog.  SF is pret-ty foggy this time of year, so it was a good series to work with.  Then georectified this image, then digitized a polygon, then smoothed the polygon.  A simple map showing this file is below, followed by a quick youtube video I compiled with all 1,600 or so images.  You can download the source images from the Naval Research Laboratory Monterey Marine Meteorology Division by clicking here.

fog


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3 Responses to “San Francisco Fog”

  1. Kevin Says:

    Nice work! This is super cool!

  2. Dee Dee Says:

    Do you know where I can locate a graph or chart or picture of the path of fog coming in the San Francisco bay and going east towards the San Pablo Bay or further inland? I saw a great chart/map/picture of this several years ago, but have not been successful in locating it again.
    Thank you,
    Dee Dee

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