Wish we had a barometer

The weather outside just went from blue and hot, to dark clouds and strong, strong wind, in just a couple of minutes. Where did THAT come from? 

There's no good, detailed instantaneous weather reporting for Guam (unlike back at home) - at least, not on publicly available services - but I would love to know what's happening with the barometric pressure right now. Well, it makes a nice breeze. I have the aircon off, and the balcony door wide open...

UPDATE: Ask, and you shall receive, kinda: I found the NOAA site for Anderson Air Force Base. It seems to have a good radar for the area, anyways. But no local observations - at least, at the moment, they are all "NULL" !