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.
January 28, 2010 at 6:24 pm |
Nice work! This is super cool!
June 24, 2010 at 2:58 pm |
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
July 10, 2010 at 1:14 pm |
Hi Dee Dee, I digitized the fog layer from a still in the video I put together, which is embedded in that same post. The video itself illustrates the path of fog coming into the bay. There doesn’t seem to be a ton of fog mapping out there, and this is pretty much everything I could find at the time.
YouTube video: http://www.youtube.com/watch?v=Lt_fm-p6aOY
Source images (constantly updated): http://www.nrlmry.navy.mil/archdat/pacific/eastern/monterey_bay/vis/