Regional Water Vapor

This satellite image displays the lower-level water vapor wavelength band (band 10) of the three water vapor bands from the GOES-16 satellite. The water vapor depicted by this particular band is typically at a pressure level around 700 millibars (approximately 10,000 feet). With sufficient surface- based convection, dry air (oranges/reds) at this level can often be translated to the surface, resulting in very low relative humidity and increased fire danger. The map, useful during day or night, has a spatial resolution of 2 km with a central wavelength of 7.3 microns. This image is provided by the College of DuPage and is updated every 5 minutes. The time of the image is shown beneath the map in UTC time (CST = UTC - 6 hours; CDT = UTC - 5 hours). Click here to see an animation of this map with county boundaries over the past four hours. More information about this particular wavelength band and its uses can be found here.