National Weather Service Pittsburgh, PA Weather Day

National Weather Service Pittsburgh, PA What is a cloud? Water vapor that condenses in the atmosphere and is visibleWater vapor that condenses in the atmosphere and is visible

National Weather Service Pittsburgh, PA Cumulonimbus - Thunderstorm

National Weather Service Pittsburgh, PA What are the main types of precipitation? Freezing Rain Sleet SnowRain

National Weather Service Pittsburgh, PA Freezing Rain (Insert freezing rain video from December 2009)(Insert freezing rain video from December 2009)

National Weather Service Pittsburgh, PA What are the hazards that come with thunderstorms? Tornadoes Flash Flooding Damaging Winds Hail Lightning

National Weather Service Pittsburgh, PA TornadoesTornadoes Rated using the Enhanced Fujita (EF) Scale Rating Wind(mph) Rating Wind(mph) EF EF EF EF EF EF EF EF EF EF EF EF Tornado violently rotating Tornado - A violently rotating column of air extending from a thunderstorm and in contact with the ground. Funnel Cloud rotating Funnel Cloud - A rotating funnel-shaped cloud extending from a thunderstorm base.

National Weather Service Pittsburgh, PA (Insert Hempfield tornado videos here)

National Weather Service Pittsburgh, PA Hempfield Township Tornado Radar “hook echo” signature

National Weather Service Pittsburgh, PA Tornado vs. Train (insert video)(insert video)

National Weather Service Pittsburgh, PA Damaging Winds (insert Canadian high plains video)(insert Canadian high plains video)

National Weather Service Pittsburgh, PA HailHail Pea – 0.25” Half inch Penny – 0.75” Quarter – 1.00” Quarter – 1.00” Half Dollar – 1.25” Golf ball – 1.75” Pool Ball – 2.00” Tennis Ball – 2.50” Baseball – 2.75” Grapefruit – 4.00” Record Hail Stone- 8 inches in diameter! -Vivian, SD March 23, Pool ball sized hail in Greensburg, PA

National Weather Service Pittsburgh, PA Insert Hail Chart From spotter trainingFrom spotter training

National Weather Service Pittsburgh, PA What should you do if you hear thunder or see lightning?

National Weather Service Pittsburgh, PA The person wearing this shoe took a direct lightning strike!

National Weather Service Pittsburgh, PA Completely Unsafe Structures Dugouts Open side Open side Small Small Nearby tall utility pole Nearby tall utility pole Water on ground Water on groundTents –Invisible to lightning

National Weather Service Pittsburgh, PA Completely Safe Structures Buildings Buildings Grounded structure Grounded structure Walls on all sides Walls on all sides Cars Cars Fully-enclosed vehicle Fully-enclosed vehicle Hard topped, metal Hard topped, metal

National Weather Service Pittsburgh, PA

National Weather Service Pittsburgh, PA Has a tornado ever hit Pittsburgh? (Insert Mount Washington 1998 Video here)(Insert Mount Washington 1998 Video here)

National Weather Service Pittsburgh, PA What is the hottest temperature in Pittsburgh? 103F three times103F three times –July –August –July

National Weather Service Pittsburgh, PA What is the coldest temperature in Pittsburgh? -22F January F January

National Weather Service Pittsburgh, PA Hottest Temperature world wide Al’Aziziyah Libya 136F September Al’Aziziyah Libya 136F September At 158F you can fry an egg outsideAt 158F you can fry an egg outside

National Weather Service Pittsburgh, PA Coldest temperature in the world Vostok Station Antarctica F July Vostok Station Antarctica F July Dry ice is FDry ice is F

National Weather Service Pittsburgh, PA What is a flood? When the amount of rainfall exceeds the amount the ground can absorb.When the amount of rainfall exceeds the amount the ground can absorb. –Flood – gradual rise –Flash Flood – rapid rise usually happens within six hours

National Weather Service Pittsburgh, PA

National Weather Service Pittsburgh, PA

National Weather Service Pittsburgh, PA

National Weather Service Pittsburgh, PA What is the difference between a Watch and a Warning? Watch - When the risk of a hazardous weather has increased significantly, but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so that those who need to set their plans in motion can do so.Watch - When the risk of a hazardous weather has increased significantly, but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so that those who need to set their plans in motion can do so. Warning - When a hazardous weather or flood event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property.Warning - When a hazardous weather or flood event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property.

National Weather Service Pittsburgh, PA What is a weather balloon? A balloon that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small device called a radiosonde.A balloon that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small device called a radiosonde. atmospheric pressuretemperaturehumidityradiosonde atmospheric pressuretemperaturehumidityradiosonde Add wx balloon video here

National Weather Service Pittsburgh, PA What impacts do Hurricanes bring to Pittsburgh? Hurricane Ivan 18 September 2004

National Weather Service Pittsburgh, PA

National Weather Service Pittsburgh, PA Storm Safety at Home 1.Setup a plan with your family. 2.Have a way to be notified of severe weather NOAA All-Hazards Weather Radio 3. Move to the interior of your home, on the lowest floor and stay away from windows. 4.If you have time, get in a bathtub and throw a mattress or pillows over yourself. 5.Crouch down and protect your head.