[s1artibartfast]

>Basically every comment is wowed by this, but nobody questions what the accuracy is

I am very skeptical. Does the San Mateo bridge really block 10 knot winds for the entire south bay? Similarly, the land temperatures all seem the same close to sea level.

[hadlock]

Tall bridges do weird things to the wind. I can confirm the bay bridge at surface level, there is functionally no wind for about half a mile downwind from it. Just glassy smooth.

[s1artibartfast]

Most of the san mateo bridge is quite low, especially the stretch crossing the bay. This is why I was so shocked it had a wind shadow 10+ miles

[hadlock]

I'm not seeing much of a wind shadow for that bridge, particularly at 4pm Friday. Maybe they updated the model already. Most of the onshore windflow begins after 11am goes from the cold (high pressure) pacific through the gg bridge, wraps around the east side of angel island and north past Richmond and Vallejo towards the hot (low pressure) central valley. South of SFO silicon valley is surrounded by tall geographic features and there's not much path to hotter (low pressure) zones so it's unusual to see high winds there unless there's a special offshore wind event coming from the south (most often in the winter).