storms thunderstorms tornados flash floods and hurricanes
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StormsThunderstorms
TornadosFlash Floods
AndHurricanes
Severe Weather – Most often
associated with Low Pressure and Rising
Air.
Severe ConditionsSevere Conditions
InstabilityInstability
Severe ConditionsSevere Conditions
Lifting MechanismLifting Mechanism
LL
Severe ConditionsSevere Conditions
Lifting Mechanism Cont…Lifting Mechanism Cont…
Cold FrontCold Front
Hot AirHot Air
Thunder Storms
Thunderstorms- created at a cold front (an unstable
environment) where warm air is forced to rise above cold air
Super Cells- Self-sustaining
severe thunderstorms
Thunderstorm Associated Events
-Lightning-Hail
-Downbursts (micro/macro)
Lightning- Friction from wind
shear cause an electrical imbalance. The release of this
electrical imbalance is lightning.
Lightning!Lightning!
Lightning!Lightning!
Electric Charges Seperate
Electric Charges Seperate
Lightning Cont…Lightning Cont…
Lightning Cont…Lightning Cont…
Lightning Cont…Lightning Cont…
Charges Return to Normal
Process Starts Over
Charges Return to Normal
Process Starts Over
Lightning FactsLightning FactsThe average flash could light a 100-watt lightbulb for more than 3 months
Most lightning occurs within the cloud
Your chances of being struck by lightning are 1 in 600,000
Most lightning deaths occur outdoors
Air near lightning is heated to 50,000 FHotter than the surface of the sun!
The average flash could light a 100-watt lightbulb for more than 3 months
Most lightning occurs within the cloud
Your chances of being struck by lightning are 1 in 600,000
Most lightning deaths occur outdoors
Air near lightning is heated to 50,000 FHotter than the surface of the sun!
Lightning SafetyLightning SafetyYou Can See Lightning Or Hear
Thunder.What Should You Do?
You Can See Lightning Or Hear Thunder.
What Should You Do?Get Inside a Sturdy Building
or Car
Play a Game of Baseball
Call a Friend
Go Climb a Tree
Take a Bath or Shower
Get Inside a Sturdy Building or Car
Play a Game of Baseball
Call a Friend
Go Climb a Tree
Take a Bath or Shower
Lightning SafetyLightning SafetyYou Can See Lightning Or Hear
Thunder.What Should You Do?
You Can See Lightning Or Hear Thunder.
What Should You Do?Get Inside a Sturdy Building
or Car
Play a Game of Baseball
Call a Friend
Go Climb a Tree
Take a Bath or Shower
Get Inside a Sturdy Building or Car
Play a Game of Baseball
Call a Friend
Go Climb a Tree
Take a Bath or ShowerIf you can see lightning or hear thunder, it can strike you!If you can see lightning or hear thunder, it can strike you!
Hail- result of rotating
updrafts and downdrafts, hail can
get as large as softballs
Hail!Hail!
Hail FactsHail FactsHail is formed when raindrops freezeThe updraft in the thunderstorm keeps the rain in the cloud and more drops freeze to itHail can sometimes be larger than a softballLarge hailstones can fall at speeds over 100 MPH!Over $1 billion in damage every year
Hail is formed when raindrops freezeThe updraft in the thunderstorm keeps the rain in the cloud and more drops freeze to itHail can sometimes be larger than a softballLarge hailstones can fall at speeds over 100 MPH!Over $1 billion in damage every year
Hail SafetyHail SafetyHail is falling from the sky.
What Should You Do?Hail is falling from the sky.
What Should You Do?
Go Inside
Run Outside and Have Hail Fights
Stay Away From Windows
Walk the Dog
Watch Out For Tornadoes
Go Inside
Run Outside and Have Hail Fights
Stay Away From Windows
Walk the Dog
Watch Out For Tornadoes
Hail SafetyHail SafetyHail is falling from the sky.
What Should You Do?Hail is falling from the sky.
What Should You Do?
Go Inside
Run Outside and Have Hail Fights
Stay Away From Windows
Walk the Dog
Watch Out For Tornadoes
Go Inside
Run Outside and Have Hail Fights
Stay Away From Windows
Walk the Dog
Watch Out For Tornadoes
Downbursts(macro and micro)
- downdrafts exceeding 100 mph caused by the rain
cooling the air
Tornados
Tornados!Tornados!
Tornado- CCW rotating funnel
of air that extends downward from cumulonimbus
clouds.
Associated with Mid-latitude Cyclones.
Forming along fronts between cP and mT
air masses
Commonly occur in the Central United States
(Tornado Alley) 700+ per year in
the US
Tornadoes FactsTornadoes FactsOver 1000 tornadoes are reported every year
Some tornadoes can be over 1 mile wide
Most last for under 5 minutes
Some can last over an hour
Wind speeds can reach over 300 MPH
Ranked on the Fujita scale F0-F5
Over 1000 tornadoes are reported every year
Some tornadoes can be over 1 mile wide
Most last for under 5 minutes
Some can last over an hour
Wind speeds can reach over 300 MPH
Ranked on the Fujita scale F0-F5
Tornadoes!Tornadoes!
Tornado Watch:Conditions Are Good For
Tornadoes. We’re Watching For Them.
Tornado Watch:Conditions Are Good For
Tornadoes. We’re Watching For Them.
Tornado Warning:A Tornado Has Been Spotted Or Found On
Radar.SEEK SHELTER!
Tornado Warning:A Tornado Has Been Spotted Or Found On
Radar.SEEK SHELTER!
What County Do You Live In ?
What County Do You Live In ?
Warnings Are Issued By County, Not By
Towns. Be Sure You Know!
Warnings Are Issued By County, Not By
Towns. Be Sure You Know!
Tornado SafetyTornado SafetyA Tornado Warning Has Been
Issued For Your County.What Should You Do?
A Tornado Warning Has Been Issued For Your County.What Should You Do?
Go Inside
Go Upstairs And Get Your Favorite Toys
Go Downstairs And Cover Your Head
Go For a Bike Ride
Stay Downstairs Until The All Clear Is Sounded
No Basement? Seek Shelter In An Interior Room
Go Inside
Go Upstairs And Get Your Favorite Toys
Go Downstairs And Cover Your Head
Go For a Bike Ride
Stay Downstairs Until The All Clear Is Sounded
No Basement? Seek Shelter In An Interior Room
Tornado SafetyTornado SafetyA Tornado Warning Has Been
Issued For Your County.What Should You Do?
A Tornado Warning Has Been Issued For Your County.What Should You Do?
Go Inside
Go Upstairs And Get Your Favorite Toys
Go Downstairs And Cover Your Head
Go For a Bike Ride
Stay Downstairs Until The All Clear Is Sounded
No Basement? Seek Shelter In An Interior Room
Go Inside
Go Upstairs And Get Your Favorite Toys
Go Downstairs And Cover Your Head
Go For a Bike Ride
Stay Downstairs Until The All Clear Is Sounded
No Basement? Seek Shelter In An Interior Room
Flash Floods!Flash Floods!
Flooding
Flash Flood FactsFlash Flood Facts
Flash floods kill more people every year than any other type of severe weather
Most flash flood deaths occur in cars
Cars can begin to float with less than 2 feet of water around them
Flash floods kill more people every year than any other type of severe weather
Most flash flood deaths occur in cars
Cars can begin to float with less than 2 feet of water around them
Flash Flood SafetyFlash Flood Safety
Stay Away From The Water!
Stay Away From The Water!It Can Make You Sick
Snakes, Rats, And Other Animals Can Be In The Water
You Can Be Swept Away
Cars Can Be Swept Away Too
It Can Make You Sick
Snakes, Rats, And Other Animals Can Be In The Water
You Can Be Swept Away
Cars Can Be Swept Away Too
Hurricanes
Hurricane- Tropical Cyclone – large, rotating, low-
pressure storm originating over tropical waters
Minimum wind speeds of 75 mphStrongest winds
located along the Eye Wall
Occur during the summer and early fall. Need ocean
waters of 27o Celsius
Fueled by the RELEASE OF
LATENT HEAT during
condensation
Hurricane Damage1) High Winds
2) Storm Surge (most deadly
3) Flooding by torrential rains
Hurricanes lose strength when
1) They move onto land
2) They move over cooler waters
THE END