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Or at least had mouse-over to see what a given polygon means. Sure, there are 40 things happening, but I can't tell all 40 colors apart!

Pink and Purple mean BAD. There is no good Pink or Purple weather

to do what? the colors represent different weather phenomenon, not the temperature. i quickly counted at least 16 different colors present on the map.

> to do what?

To make it possible to use the key at the bottom reliably.

For example, off the coast of California, there are two shades of purple. I'm pretty confident the darker one means Gale Warning. But what is the lighter one? Is it the light purple for Small Craft Advisory? Or the other light purple for Brisk Wind Advisory? Or the other light purple for Hazardous Seas Warning?

It's the same color so it means all three are in effect for those zones.

Oh, you're right! In Chrome developer tools, they're all #D8BFD8.

I assumed they were subtle differences because elsewhere there are colors with subtle differences: Flood Warning is #00FF00, and Flood Advisory is #00FF7F.

To state the obvious, it should be usable without needing developer tools.

No kidding. How many shades of purple are they going to use...