2. ◦ Low Pressure ◦ Strong Winds ◦ Hazardous to Life and Property

3. ◦ Locashun ◦ Size ◦ Durashun ◦ Season of Occurence ◦ Distinctive Hazards

4. ◦ Hurricane season  Late Summer and Fall ◦ Tornado season  Spring and Early Summer

5. ◦ Hurricanes form over warm (80 °F) tropical seas  Latitude 7-15 degrees North and South of the equator ◦ Tornadoes form over land in the mid-latitudes

7. ◦ High winds  75-125 mph ◦ Torrential rains  Flash floods ◦ Storm surges as sea level rises

8.  Category One -- Winds 74-95 mph  Category Two -- Winds 96-110 mph  Category Three -- Winds 111-130 mph  Category Four -- Winds 131-155 mph  Category Five -- Winds greater than 155 mph

9. ◦ Most common in the United States ◦ Plains States, Midwest, and Florida ◦ In advance of a cold front ◦ Embedded in hurricanes

10. ◦ Narrow intense storm ◦ 1/4 mile wide ◦ Path of 6 miles SW to NW

11. ◦ Wind Speed 40 – 300 mph ◦ Strong updraft in the funnel ◦ Explosions due to pressure contrast

12.  F-0: 40-72 mph, chimney damage, tree branches broken  F-1: 73-112 mph, mobile homes pushed off foundation or overturned  F-2: 113-157 mph, considerable damage, mobile homes demolished, trees uprooted  F-3: 158-205 mph, roofs and walls torn down, trains overturned, cars thrown  F-4: 207-260 mph, well-constructed walls leveled  F-5: 261-318 mph, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters