Punxsutawney Phil usually makes his weather call early in the morning. It typically happens after 7 a.m. Tradition says Phil seeing his shadow is a sign that the next six weeks will bring wintry weather. If Phil doesn't see his shadow, it means an early spring.

Gobbler's Knob in Punxsutawney, Pennsylvania, as the world's most famous groundhog, Punxsutawney Phil, will emerge for his annual prognostication. Over 40,000 people are expected for this year's festivities.

There is only one Punxsutawney Phil, but many challengers to his throne. How accurate are they? These weather experts decided to find out.