Severe weather

Different Types of Severe WeatherThunderstormsTornadoesHurricanesFloodsWinter StormsDroughts

Thunderstorms

Tornadoes

Hurricanes

Floods

Winter Storms

Droughts

ThunderstormsA storm containing thunder and lighting Usually produces heavy wind and occasionally hailThunderstorms need:MoistureUnstable AirLift

A storm containing thunder and lighting

Usually produces heavy wind and occasionally hail

Moisture

Unstable Air

Lift

ThunderstormsFour Different Types:The Single Cell StormThe Multicell Cluster StormThe Multicell Line StormThe Supercell Storm

The Single Cell Storm

The Multicell Cluster Storm

The Multicell Line Storm

The Supercell Storm

TornadoesA narrow, violently rotating column of air that extends from the base of a thunderstorm to the groundWarm, Moist Air+Cool, Dry Air=Instability in Atmosphere

A narrow, violently rotating column of air that extends from the base of a thunderstorm to the groundWarm, Moist Air+Cool, Dry Air=Instability in Atmosphere

TornadoesTornado Intensity: Enhanced, Operational Fujita Scale:EF0: 65-85mph: Light damage; Broken tree branchesEF1: 86-110mph: Moderate damage; Trees snapped, roofs damagedEF2: 111-135mph: Considerable damage; Trees uprooted, Mobile homes demolishedEF3: 136-165mph: Severe damage; Cars lifted off ground, Trains overturnedEF4: 166-200mph: Devastating damage; Houses destroyed, Cars thrown 300 yards or more in airEF5: Over 200mph: Incredible damage; Strongly built homes completely thrown away

EF0: 65-85mph: Light damage; Broken tree branches

EF1: 86-110mph: Moderate damage; Trees snapped, roofs damaged

EF2: 111-135mph: Considerable damage; Trees uprooted, Mobile homes demolished

EF3: 136-165mph: Severe damage; Cars lifted off ground, Trains overturned

EF4: 166-200mph: Devastating damage; Houses destroyed, Cars thrown 300 yards or more in air

EF5: Over 200mph: Incredible damage; Strongly built homes completely thrown away

HurricanesHurricanes occur when cool winds move over the very warm ocean waters in the summer. The cool air is forced up by the warm moisture of the ocean forming a hurricane.Facts: Can be up to 600 miles acrossSpeeds of 75-200 mphEach one usually lasts over a weekMoves 10-20 mph over an open oceanThe “eye” is the calmest part

Can be up to 600 miles across

Speeds of 75-200 mph

Each one usually lasts over a week

Moves 10-20 mph over an open ocean

The “eye” is the calmest part

Hurricane Stageshttp://www.weatherwizkids.com/weather-hurricane.htm

FloodsFlood: Overflowing of water onto land that is normally dryTypes of Floods:River FloodsCoastal FloodingInland FloodingFlash Flood (Most Dangerous)

Flood: Overflowing of water onto land that is normally dryTypes of Floods:

River Floods

Coastal Flooding

Inland Flooding

Flash Flood (Most Dangerous)

FloodsFlood Facts:Number one weather-related killer in the USJust 2 feet of water can float your vehicle (or even a bus!)Six inches of rapidly moving water can knock you down“Turn around, Don’t Drown!” 80% of flash flood deaths are auto-related

Number one weather-related killer in the US

Just 2 feet of water can float your vehicle (or even a bus!)

Six inches of rapidly moving water can knock you down

“Turn around, Don’t Drown!” 80% of flash flood deaths are auto-related

Winter StormsUsually develops when cold, dry air moves south and hits warm, moist air moving north.Types of Weather During a Winter Storm:BlizzardsSleetFreezing RainLake-Effect Snow

Blizzards

Sleet

Freezing Rain

Lake-Effect Snow