Transcript Check your Fronts Chart Study Guide for

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Understanding Weather
Assuming the amount of water vapor in
the air stays the same
• 1. What is relative humidity?
• 2. What happens to relative humidity if the
temperature increases?
• 3. What happens to relative humidity if the
temperature decreases?
Assuming the amount of water vapor in
the air stays the same
• 1. Relative humidity is the amount of moisture in the
air compared to the amount of moisture the air can
hold at that temperature.
• 2. What happens to relative humidity if the
temperature increases?
– decreases
• 3. What happens to relative humidity if the
temperature decreases?
– increases
Dew Point
• What is Dew Point?
• When is air saturated?
• What happens if the temperature of the air is
the same as the dew point? (remember the
LAB!)
Dew Point
• What is Dew Point?
– the temperature at which a gas condenses to a liquid
(or water vapor becomes water)
• When is air saturated?
– air is saturated when it has a relative humidity of
100% which means dew point has been reached
• What happens if the temperature of the air is the
same as the dew point? (remember the LAB!)
– water vapor will condense and form a liquid, or dew!
– in the atmosphere water vapor will condense on a
dust particle and become a cloud
Air Masses
•
•
•
•
•
Continental means wet or dry?
Maritime means wet or dry?
Polar means warm or cold?
Tropical means warm or cold?
What is the boundary between air masses
called?
Air Masses
• Continental means wet or dry?
– dry
• Maritime means wet or dry?
– wet
• Polar means warm or cold?
– cold
• Tropical means warm or cold?
– warm
• What is the boundary between air masses called? A
front
What is a cloud made of?
What is a cloud made of?
• Water droplets condensed on dust particles in
the air
1. Which symbol belongs to which front?
2. What color is each front symbol?
3. What type of weather does each front bring?
.
D.
C.
B.
A.
Check your Fronts Chart for answers to the weather each front brings.
1. Which symbol belongs to which front?
2. What color is each front symbol?
3. What type of weather does each front bring?
.
C.
B.
A.
Warm front
Occluded front
Cold front
Stationary front
Check your Fronts Chart Study Guide for answers to the weather
each front brings.
Be able to answer the following:
• 1. If you see these clouds in the sky what do
they look like and what weather can you
expect?
– Cumulus
– Cumulonimbus
– Cirrus
– Stratus
Be able to answer the following:
• 1. If you see these clouds in the sky what
weather can you expect?
– Cumulus – white puffy; fair weather
– Cumulonimbus – thunderhead – thunderstorm w
possible hail which forms in cold front
– Cirrus – ice crystals; rain in 24 – 48 hrs.
– Stratus- flat layered that form in a warm front and
bring gentle steady rain
Air Masses
A.
B.
C.
D.
E.
F.
G. What is the origin of each of the
3 mT air masses?
Air Masses
A. mP
B. cP and/or cA
C. mP
D. cT
E. mT
F. mT
G. What is the origin of each of the
3 mT air masses?
Pacific, Gulf of Mexico and Atlantic
Cold Air Masses
• What kind of weather does a cP air mass bring
in the summer?
• What kind of weather does a cP air mass bring
in the winter?
• What kind of weather does an mP air mass
bring in the summer?
• What kind of weather does a mP air mass
bring in the winter?
Cold Air Masses
• What kind of weather does a cP air mass bring
in the summer? Cool, dry
• What kind of weather does a cP air mass bring
in the winter? Extremely cold winter weather
• What kind of weather does an mP air mass
bring in the summer? Cool, foggy
• What kind of weather does a mP air mass
bring in the winter? rain and snow in Pacific region;
cool, cloudy w. rain or snow in Atlantic area
Warm Air Masses
• What kind of weather does a cT air mass bring
in the summer?
• What kind of weather does a cT air mass bring
in the winter?
• What kind of weather does a mT air mass
bring in the summer?
• What kind of weather does a mT air mass
bring in the winter?
Warm Air Masses
• What kind of weather does a cT air mass bring
in the summer? clear, dry, hot
• What kind of weather does a cT air mass bring
in the winter? Warm and dry
• What kind of weather does a mT air mass
bring in the summer? Hot, humid, with possible
hurricanes and thunderstorms
• What kind of weather does a mT air mass
bring in the winter? Mild, often cloudy
Think about it…
• Would a farmer prefer the rain from a warm
front or a cold front to come through his area
during the growing season?
• Explain why..
Think About It
• Suppose you are planning an outdoor activity
for tomorrow afternoon. You hear on the
weather that a front is coming through
tonight. With the understanding that you
want to be outside tomorrow, which of the 4
fronts we learned about would you rather
have come through?
• Fully explain why.