Transcript Hurricanes Blizzards Lake Snow - Hicksville Public Schools

OBJ: Given notes and activity sheet SWBAT explain how a
hurricane, blizzard and the lake-snow effect forms as well
as emergency preparation for these storms with 70%
accuracy.
DN: Distribute Notes; What should you do in the event of a
tornado? a thunderstorm?
ACT: Introduction to . . . (How they form, emergency prep)
Hurricanes
Blizzards
Lake-Snow Effect
iPad Assignment
HW: Text, read p.86-89; Complete Storm Booklet;
Weather Exam, Oct 29; Work on Cumulative Review
Sheets; Interim Exam Nov 6 (10%); WES Exam Nov 19
Hurricanes, Blizzards, Lake-Snow
Effect Notes
• Hurricanes: forms over warm ocean water near equator;
rapid evaporation of large amounts of warm ocean water
produces rising humid air (mT). Clouds form with high
winds and heavy rain near eye wall. Surface winds move
counterclockwise inwards; between 0°-30°N, move NW
due to trade winds; between 30°-60°N move NE due to
prevailing SW winds;
• Why do hurricanes die?
loss of energy over land or they move into cooler ocean
waters.
DAMAGE: coastal flooding and wind damage
SAFETY: evacuate area, go to higher ground.
Cumulative Hurricane Storm Tracks
30º N
Storm Surge
Hurricanes, Blizzards, LakeSnow Effect Notes
• Blizzard: precipitation when atmosphere is
cold due to jet stream ( = invisible river of
cold air in the lower stratosphere); heavy
snowfall with high wind speed; SAFETY: go
into shelter; check home heating oil; have
generator for electric power, store
blankets, food, fuel (gas, oil, coal, wood).
BLIZZARD
• Lake-Snow Effect (near Great Lakes of
US): warm lake water produces warm humid
(mT) air which is less dense; in the US,
weather moves from west to east due to the
prevailing SW winds (30°-60°N); so, the mT
air rises and cools with altitude producing
clouds; since atmosphere is cold, heavy
snowfall occurs. SAFETY: go into shelter;
keep warm by storing blankets, food, fuel
(gas, oil, coal, wood), have electric
generator.
Lake – Snow Effect
WEST
Movement of Weather
EAST
Lake – Snow Effect
(green yellow)
WEST
Movement of Weather
EAST
Weather Movement
Mid Latitude
Cyclone
Mid Latitude Cyclones