Keywords: Heat Index.svg en The ˜Heat Index ™ is a measure of how the hot weather feels to the body This table uses relative humidity and air temperature to produce the apparent temperature or the temperature the body feels These values are for shady locations only Exposure to full sunshine can increase heat index values by up to 15°F Also strong winds particularly with very hot dry air can be extremely hazardous as the wind adds heat to the body 2012-03-24 http //www srh noaa gov/jetstream/global/hi htm http //www srh weather gov/jetstream/downloads/heatindex_graph_20x16 pdf National Weather Service Southern Region Headquarters PD-USGov Uploaded with UploadWizard Heat and humidex Indices |