The new National Cattle Comfort Advisor is an online tool that helps cattle producers monitor the severity of cold or hot weather events. The tool calculates heat and cold index values based on air temperature, wind speed, sunlight, and humidity and produces national maps on an hourly basis. These maps indicate areas experiencing weather in heat and cold caution and danger ranges. National maps are produced on an hourly basis. The National Cattle Comfort Maps were developed and are maintained by the Oklahoma Mesonet, supported by an Agriculture and Food Research Initiative grant.