A view of the Twin Cities urban heat island! This is an infrared satellite loop. It basically shows the temperature of whatever surface the satellite signal reaches. In the case of the 'warmer' colors on the move to our southwest: those are clouds in a warmer air mass (so they're warmer than our ground temps!). You can see the purple that is the Twin Cities: we heat up quicker than surrounding areas because of buildings, pavement when the sun hits. Note also: the bright green across central & no