1. Hurricanes and Tornadoes
Weather Lesson Eight
Hurricanes and Tornadoes

2. HURRICANES vs TORNADOES
A large tropical storm with
winds blowing at least 74 mph.
A small, brief, intense wind
storm with winds blowing at
least 40 mph.
1. A low pressure storm.
1. A low pressure storm.
2. Winds blow at least 74 mph
(up to 150 mph)
2. Winds blow an average of
150 mph (up to 300 mph).
3. Average width is 400 miles
in diameter.
3. Average diameter is less
than 0.3 miles.
4. May last from days to a
week (or more).
4. Lasts seconds to an hour or
more (at the most).
5. Occur over warm water
(condensation allows more
water to evaporate below).
5. Occurs over land and/or
water (waterspout) on
usually flat surfaces.
6. Usually occur in late
summer and early fall.
6. Usually occur in spring and
early summer.