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.
Humidity directly affects the ability of the body to regulate internal heat through perspiration.
In the Jefferson Lab region, summertime humidity is often high and is as important as actual temperature in heat advisories by the National Weather Service.