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Types of Severe WEATHER
and Fronts
Weather
A daily change in the condition of the
atmosphere
Our Sun
The sun
provides the
that is
responsible
for all of
Earth’s
weather
Types of weather
Severe weather
Tornado
• A severe storm
that forms as
rapidly rotating
funnel cloud.
• The peak
season in
Tennessee is
March – May
Tropical Storms/Hurricanes
• Low pressure storm
with high winds from
the ocean
Categories of Hurricanes
1. 74-95 mph – minimal hurricane
2. 96-110 mph – moderate hurricane
3. 111-130 mph – extensive hurricane
4. 131-155 mph – extreme hurricane (Andrew)
5. >155 mph – catastrophic hurricane
Fronts
• The point where two air masses meet
• Causes change in weather
Warm Front
• Warm air mass
• Will rise over cool air mass
• Cause light rain followed by hot humid
weather
Cold Front
• A cold air mass
• Cold front will push under warm front
• Causes severe weather- heavy rains and
thunderstorms
• Followed by cool weather
Review Questions
1.Can you show me a cold front on
this map?
2. Can you find a warm front on this
map?
3.What type of weather is the
northeast having?
4. Sharon woke up on a sunny morning and ate
breakfast. Then she looked outside and saw
tall, quickly-forming clouds. The clouds looked
ready to rain. When she turned on the TV, she
saw just what she thought--a forecast for
sudden rains. What most likely caused the
change in weather?
A. lack of wind
B. an expanding warm air mass
C. a warm front overtaking a cold air mass
D. a cold front overtaking a warm air mass