It is a measure of what hot weather feels like to the average person over various temperatures and relative humidities. Extreme Danger Apparent temp. Danger Apparent temp. Extreme Caution Apparent temp. Va. Twenty-four weather alert radios are located on site.
Every major building has at least one radio.
For more information about Jefferson Lab's weather alert radios, see Appendix 3510-T4 Severe Weather Procedures , page 3. Call the telephone company's weather information number, 877-1221, for a recording of the latest, local weather report. Listen to the cable television weather channel or local radio for special and local weather advisories. The higher the temperature, the more water vapor it can hold. The saturation value is the maximum amount of water vapor possible at a given temperature.