Weather-predicting crown of lights

The top of One Ricon Hill in San Francisco is ablaze with colored LED floodlights at night. The lights, in addition to simply looking festive, act as a weather beacon, forecasting with glowing amber, blue, red or green lights. As one article puts it, "a bit like a 64-story mood ring".

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The lights atop this residential high rise building will go on at dusk, and remain on all night. Every day, the National Weather Service forecast for San Francisco will be reviewed, and the color predicting the next day's weather selected.

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Here's how to remember what each color means:

Glowing red, warmer weather ahead

Shining blue, colder weather in view

Going green, rain foreseen

Amber light, no change in sight.

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Other weather beacons across the country and the world include:
  • John Hancock Building, Boston, MA
  • Syracuse, N.Y
  • Minneapolis, M.N.
  • Dubuque and Des Moines, Iowa
  • Bismarck, N.D.
  • Toronto, Canada
  • Brisbane and Adelaide, Australia