Download weather

Types of Severe WEATHER
and Fronts
Objective:
Can I use meteorological data to
predict weather?
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 and gradually
replaces the cold air.
• 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
Occluded Front
• Forms when a warm
air mass is caught
between two colder
air masses.
• Has cool
temperatures and
large amounts of rain
and snow.
Stationary Front
• Forms when a cold air
mass meets a warm
air mass. Both air
masses do not have
enough force to life
the warm air mass
over the cold.
• Days of cloudy, wet
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. Can you find the occluded front
on this map?
4. Can you find the stationary front
on this map?
5.What type of weather is the
northeast having?
6. 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