The National Weather Service welcomes volunteers with an interest in severe weather spotting. The Skywarn program is totally voluntary. You will be trained on weather events similar to those listed in the Severe Weather Spotters Guide, and you may have the opportunity to call in several times a month depending on the weather pattern in your neck-of-the-woods.
If you agree, the National Weather Service may occasionally call you for a ground truth as to what is actually happening near your home. Most likely the phone call will be to confirm an element of potentially severe thunderstorms, like large hail, or damaging wind. Other calls may be to verify heavy snowfall or peak wind speed associated with large winter storms.
Additional information may be found at: : http://www.wrh.noaa.gov/pqr/skytraining.php