 Weather that causes damage and destruction  Comes in 3 basic forms, each an escalation of the previous  Thunderstorms  Tornadoes  Hurricanes.

Slides:

Advertisements

Similar presentations

Severe Weather.

Advertisements

Severe Weather.

Prentice Hall EARTH SCIENCE

Hurricanes. Midlatitude Cyclones vs. Tropical Storms  Midlatitude Cyclones  Cover large area  Have cold fronts and warm fronts  Less violent (except.

Chapter 24 Section 2 Handout

Severe Weather.

WEATHER WORDS THUNDERSTORM  A Disturbance in the Earth’s atmosphere that involves lightning and thunder.

FRONTS Fronts When 2 air masses meet density differences keep them separate Front- boundary between air masses 100’s to 1,000’s of miles wide.

Weather Patterns and Severe Storms Chapter 20

Air Masses Large bodies of air formed when a body of air hangs over a region and takes the temperature and humidity from that region.

Severe Weather Cyclonic Severe Weather.  Cyclone= low pressure system  Can develop into severe weather if conditions are right  Severe weather includes:

Severe Weather A SCIENTASTIC PRESENTATION. Storm Chaser’s Clip dominator.htm Discussion.

Chapter 25 Modern Earth Science

Severe Weather. Thunderstorms Small intense systems that can produce strong winds, rain, lightning and thunder. Need 2 conditions –Air near surface needs.

Storms: Violent disturbances within the atmosphere.

Severe Weather.

The Earth’s Atmosphere: Weather Related Phenomena SOL 6.6 Part 6.

Chapter 20.3 Severe Storms.

Weather Patterns (57) An air mass is a large body of air that has properties similar to the part of Earth’s surface over which it develops. Six major air.

Section 2: Fronts Preview Objectives Fronts

For clouds to form, air must be lifted Frontal Convectional Orographic.

Date: Monday, July 7th Topic: Thunderstorms

Violent Storms. THUNDERSTORMS FORM IN WARM,MOIST UNSTABLE AIR. CUMULONIMBUS CLOUDS. ATTAIN HEIGHTS OF 20 KM. TORRENTIAL RAIN,DAMAGING WINDS, LIGHTNING,

Severe Weather.

The Nature of Storms There are 3 Stages of a thunderstorm:

Thunderstorms Severe Storms  A thunderstorm is a storm that generates lightning and thunder. Thunderstorms frequently produce gusty winds, heavy rain,

Air Masses and Weather 17 Air Masses  Air Masses An air mass is an immense body of air that is characterized by similar temperatures and amounts of moisture.

Ch 20 Severe Weather. Storms and severe weather begin with WARM air rising. This LOW pressure and is considered UNSTABLE.

The AtmosphereSection 3 Fronts and Severe Weather 〉 How do fronts affect the weather? 〉 When fronts move through an area, the result is usually precipitation.

Chapter 17 Section 2 Severe Weather.

Severe Weather Thunderstorms, Tornadoes, and Hurricanes.

Atmosphere Composition Nitrogen  78% Oxygen  21% Other  about 1% Nitrogen  78% Oxygen  21% Other  about 1%

Section 3 Severe Weather

What Is a Thunderstorm?  Produce Rain, Lightning, and Thunder  2000 Thunderstorms Occur Every moment.

Rules of precipitation Rain will occur on the cold front. Rain will occur in front of the warm front.

Moisture - Preferably in the lower or mid levels of the atmosphere Source of lift – Agent which lifts the warm, moist air starting the thunderstorm –

Storms and the Movement of Air Textbook pages

Lesson 2 Vocabulary Storms 1.Thunderstorm – a disturbance in the earth’s atmosphere that involves lightning and thunder; sometimes gusty surface winds,

SCIENCE NEWS. TROPICAL CYCLONES Weather related deaths in the u.s.

 A usually brief, heavy storm that consists of rain, strong wind, lightning, and thunder.

Weather Types. Lightning A bright flash of electricity produced by a thunderstorm thunderstorms.htm.

Weather. Making Weather Forecasts  Weather Measurements are Made  Measurements are Put Into Weather Forecast Models  The Models are Interpreted.

Warm Up 4/2/08 How does surface air flow in a middle-latitude cyclone in the Northern Hemisphere? a. convergent and counterclockwise b. divergent and clockwise.

20.3 Severe Storms Thunderstorms

Bell Ringer Cumulonimbus clouds have a tall structure and a flat base. What are they usually associated with?

Chapter 13.1 Thunderstorms

Prentice Hall EARTH SCIENCE

Severe Weather S6E4 b. Relate unequal heating of land and water surfaces to form large global wind systems and weather events such as tornados and thunderstorms.

Severe Storms Classified under severe storms are thunderstorms, tornadoes, and hurricanes.

Severe Storms Cyclone = generic term for an organized system of winds rotating inward to an area of low pressure.

Severe Storms Classified under severe storms are thunderstorms, tornadoes, and hurricanes.

Storms Chapter 13.

Weather Patterns and Severe Storms

Forms of Severe Weather

Warm-up Explain the difference between climate and weather.

Severe Weather Foldable

Severe Weather.

Thunderstorms and Tornadoes

Severe Weather.

Severe Weather!!!!!!! Chapter 20.3

What do you like to do during a thunderstorm???

Severe Weather!!!!!!! Chapter 20.3

Weather Patterns and Severe Storms

Severe Storms CH 20.3.

Severe Weather S6E4 b. Relate unequal heating of land and water surfaces to form large global wind systems and weather events such as tornados and thunderstorms.

Thunderstorms and Tornadoes

Severe Storms Unit 8 - Chapter 20.3.

Severe Weather DCI: 6.ESS2.6

Presentation transcript:

 Weather that causes damage and destruction  Comes in 3 basic forms, each an escalation of the previous  Thunderstorms  Tornadoes  Hurricanes

 Caused by violent updrafts of air (form cumulonimbus clouds)  Usually form within marine tropical air (warm and humid)  Severe thunderstorms: large and long- lived (several hours) thunderstorms that produced frequent lightning, damaging winds, and sometimes hail  Usually form along or ahead of cold fronts (forceful uplift)

 Lightning: Bottom of cloud gets negative charge- positive flow from earth to balance this out  Thunder: Caused by the rapid heating/expansion of air due to lightning

 Violently rotating column of air which descends from a thunderstorm  Associated with “supercell” thunderstorms- severe rotating thunderstorm  Intensity measured using Fujita Tornado Damage Scale

 Tropical cyclones with fast moving winds (greater than 74 miles per hour)  Progression of windspeed:  Tropical depression  Tropical storm  Hurricane  Eye: center of the hurricane; Eye wall: the area of intense updraft just outside the eye—fastest winds and heaviest rainfall

 Hurricanes are fueled by latent heat! Need massive quantities of warm air with plenty of water vapor so air keeps rising  Need water above 27  C (80  F)  Need to be greater than 5  from the equator (need Coriolis effect)