Severw+Weather+review

HES Severe Weather Objectives **You know what to do...same rules. Remember to write only your first name or web name! I will check for correctness late Monday afternoon. -** // Hesmaster // 1. Describe the 5 types of potential severe weather caused by severe storms. Morgan; Tornados, Flooding, Wind, Lightening, Hail 2. What conditions are needed for a thunderstorm to develop? When warm moist air meets cold air Morgan 3. Thunderstorms are formed in what type of cloud? Name and describe it. Morgan: Cumulonimbus Cloud- A cloud that is tall, dense, and involved in thunderstorms and other intense weather. It is a result of atmospheric instsability. These clouds can form alone, in clusters, or along a cold front in a squall line, Cumulonimbus clouds form from cumlulus clouds and can further develop into a supercell, a severe thunderstorm with special features. 4. Explain how hail is formed and why it has a concentric structure. Hail gets caught in a cycle of updrafts and downdrafts. And when it goes up it freezes and when it falls it gets a layer of water. And it continues until it falls out of the cloud when it is too heavy. Morgan

5. Review rules for lightning safety (indoors and outside).

Seek Shelter

 * Look for a large, enclosed building when a thunder or lightning storm threatens. That's the best choice.
 * If you are in a car and it has a hard top, stay inside and keep the windows rolled up.
 * Avoid small sheds and lean-tos or partial shelters, like pavilions.
 * Stay at least a few feet away from open windows, sinks, toilets, tubs, showers, electric boxes and outlets, and appliances. Lightning can flow through these symptoms and "jump" to a person.
 * Do not shower or take a bath during a thunder or lightning storm
 * Avoid using regular telephones, except in an emergency. If lightning hits the telephone lines, it could flow to the phone. Cell or cordless phones, not connected to the building's wiring, are safe to use.

If you are caught outside: //(If you are unable to reach a safe building or car, knowing what to do can save your life.)//
Morgan
 * If your skin tingles or your hair stands on the end, a lightning strike may be about to happen. Crouch down on the balls of your feet with your feet close together. Keep your hands on your knees and lower your head. Get as low as possible without touching your hands or knees to the ground. DO NOT LIE DOWN!
 * If you are swimming, fishing or boating and there are clouds, dark skies and distant rumbles of thunder or flashes of lightning, get to land immediately and seek shelter.
 * If you are in a boat and cannot get to shore, crouch down in the middle of the boat. Go below if possible.
 * If you are on land, find a low spot away from trees, metal fences, pipes, tall or long objects.
 * If you are in the woods, look for an area of shorter trees. Crouch down away from tree trunks.

6. Explain the formation of a lightning channel (induction).

The charges on the bottom of the cloud creatie the opposite charge on the ground That allows a channel to form. Morgan

7. What does a severe storm look like on a weather map? (Someone scan an image or cut and paste one from a weather map!) Label the 3 fronts. Morgan **8. What do the cloud patterns of a severe storm look like on a satellite image? (Can you find one and paste its image in here?)** the cloud patterns will form a "comma" shape, which is the 3 fronts (cold, warm, and occluded) meeting. Amy amy 9. Along what type of front does the most severe weather form? The cold front- Morgan 10. What is the difference between a tornado __watch__ and a __warning__? Watch- Alerts the public the possibilities of tornados over a specified area for a particular time interval./ it sets motion procedures necessary to deal adequately with detection, trading, warning and response. Warning- Issued by local offices of the National Weather Service when a tornado has actually been sighted in an area or is indicated by weather radar./ it warns a high probability of imminent danger 11. What are occluded fronts and how do they form? A front formed when a cold front overtakes a warm front, it marks the beginning of the end of a middle- latitude cyclone Morgan 12. What is a NOAA Weather radio and why is it useful?

**NOAA Weather Radio All Hazards ** (NWR) is a nationwide network of radio stations broadcasting continuous weather information directly from the nearest [|National Weather Service office]. Morgan

13. In order for a tornado to develop from a thunderstorm, what must happen?

Wind sheer has to turn the updraft so that a funnel cloud can develop Morgan

14. What tool do meteorologists use to determine whether there may be a tornado forming in a storm? morgan- The Doppler Radar 15. Tornadoes are classified in intensity by the modified Fujita Scale. Describe it. The Fujita Scale is a scale going from 1-5, 5 being the most intense. Morgan 16. Review rules for tornado safety (indoors and outside). ** Before the Storm: ** ·  Develop a plan for you and your family for home, work, school and when outdoors. ·  Have frequent drills. ·  Know the county/parish in which you live, and keep a highway map nearby to follow storm movement from weather bulletins. ·  Have a  [|NOAA Weather Radio]  with a warning alarm tone and battery back-up to receive warnings. ·  Listen to radio and television for information. If planning a trip outdoors, listen to the latest forecasts and take necessary action if threatening weather is possible.

·  In a home or building, move to a pre-designated shelter, such as a basement. ·  If an underground shelter is not available, move to an interior room or hallway on the lowest floor and get under a sturdy piece of furniture. ·  Stay away from windows. ·  Get out of automobiles. ·  Do not try to outrun a tornado in your car; instead, leave it immediately. ·  Mobile homes, even if tied down, offer little protection from tornadoes and should be abandoned. Morgan