¥Strong Fronts
¥Cold at Storm Center Aloft
¥Strongest Winds Aloft
¥Forms outside Tropics
¥Diameter of 500-1000 miles
¥Energy Source: Horizontal Temperature Contrast
Differences Between Tropical and Extratropical Storms
Williams, The Weather Book
¥No Fronts
¥Warm at Storm Center Aloft
¥Strongest Winds near Surface
¥Forms over Tropical Oceans
¥Diameter of 200-500 miles
¥Energy Source: Energy Fluxes from Warm Ocean