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10-pptnotes-severeweather-160606191540.pdf

  1. Thunderstorms Lightning Tornadoes
  2. Hurricanes Blizzards
  3.  Weather is the state of the atmosphere in a specific place and time  There are many components that affect the weather  1. Temperature-How hot or cold the air is  2. Humidity-The amount of water that is in the atmosphere  3. Air Pressure-The amount of force pressing down on earth’s surface from the gases in the atmosphere  4. Wind-Air moving in a specific direction
  4.  An air mass is a large body of air that has similar properties to the part of Earth’s surface over which it develops  What type of air mass would develop over Africa?  What type of air mass would develop over Antarctica?  A boundary between two air masses of different moisture or temperature is a front.
  5.  Weather that may cause property damage or loss of life  Types of severe weather are:  Thunderstorms  Tornadoes  Hurricanes  Blizzards  Floods
  6.  A heavy storm that is accompanied by rain, thunder, lightning and strong winds.  To create a thunderstorm you need  Moisture: cloud formation & rain  Unstable air: relatively warm air rises rapidly  Lifting: from sea breezes and mountain interaction Thunderstorms are measured based on their wind speeds.
  7.  A Severe Thunderstorm Watch can be issued by the National Weather Service station  This type of storm has winds of at least 58 mph or hail at least ¾ inch in diameter  A Severe Thunderstorm Warning is issued when a severe thunderstorm has actually been observed
  8.  Go inside and stay away from windows, doors, and porches  Stay away from trees and out of boats  Avoid plumbing fixtures and contact with electrical fixtures  Stay off the phone!
  9.  A destructive rotating column of air with very high winds and a funnel shaped cloud in contact with the surface of the earth  Tornadoes form when a thunderstorm meets horizontal winds which cause it to rotate.  Tornadoes can come one at a time or in clusters  They can also vary in size, length, width, direction of travel, and speed
  10.  Tornadoes are measured based on their wind speeds and by using the Enhanced Fujita Scale EF 0 65 to 85 MPH EF 1 86 to 110 MPH EF 2 111 to 135 MPH EF 3 136 to 165 MPH EF 4 166 to 200 MPH EF 5 Over 200 MPH
  11.  Tornado Watch: weather conditions are likely for tornadoes to form in our area  Tornado Warning: A tornado has been sighted in our area
  12.  Tornadoes can occur in any state and any time of year  They typically occur from March to August  The most common tornadoes are in “Tornado Alley”  “Tornado Alley” - Arkansas, Iowa, Kansas, Louisiana, Minnesota, North Dakota, Ohio, Oklahoma, South Dakota, and Texas
  13.  Seek shelter immediately when a tornado warning is issued  Underground shelter is best  If not available, find an inside room, hallway, or closet on the lowest floor and away from windows  Listen to the radio or watch TV for updates on the storm
  14.  A severe storm that develops over tropical oceans and whose winds are stronger that 120 km/hr that spiral in to an intense low pressure center  Hurricanes begin when warm moist air over the ocean rises rapidly  When moisture in this rising air condenses a large amount of heat is released  The released heat increases the force of the rising air
  15.  They form when they gather heat and energy through contact with warm ocean waters  Water evaporates from the water and the moisture produces a storm  They can also form when a wind pattern occurs near the surface of the ocean and spirals inward
  16.  Measured using the Safir-Simpson Scale  3 factors are considered  Wind Speed  Central Pressure  Storm Surge
  17.  Hurricanes can occur during any time of the year  Hurricane season is from June 1st to November 30th  They can form in the Atlantic Ocean, Caribbean Sea, Gulf of Mexico, and in the eastern Pacific Ocean
  18.  Know if the location you are in is a safe zone or whether evacuation may be needed  Protect windows and glass with plywood  Turn off utilities  Have a supply kit including first aid, water, canned goods, battery powered radio, blankets, etc.  After evacuation, do not return until it has been declared safe
  19.  A Hurricane Watch occurs when a hurricane is possible within 36 hours  The storm is being tracked to predict where it may hit  A Hurricane Warning is issued when it the storm is expected to hit within 24 hours  Evacuation may be needed
  20. Two sources of forecasting weather  Data collected from upper atmosphere  Data collected on the Earth’s surface
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