Bell Questions 12/19/14 What type of air would a maritime polar air mass have? What are four kinds of fronts?

Severe Weather

Midlatitude cyclone - an area of low pressure characterized by rotating wind that moves toward the rising air of the central low-pressure region

Midlatitude cyclones are many of the storms that come across the US

Thunderstorm a brief, heavy storm warm, humid air rising, updrafts rain falls and drags some of the cooler air with it creating downdrafts dissipating stage, strong downdrafts stop air from rising

Tornado rotating column of air high wind speeds (F5 is 318 mph) funnel-shaped cloud formed over land Tornado Alley in the US has the most tornadoes in the world Fujita scale

Hurricane develops over tropical oceans winds of more than 120 km/h (73mph) low-pressure storm center Storm surge, submerge coastal areas, causes most damage

Hurricane Isabel

Katrina 2005

Bell Questions 3/30/10 List two differences between tornadoes and hurricanes. A _____________ ___________ is an area of low pressure, rotating wind that moves toward the rising air of the central low-pressure system.

Thermometer measures and indicates temperature

Barometer measures atmospheric pressure Drop in pressure means front is coming

Anemometer measures wind speed small cups that are attached to a shaft that rotates freely.

Wind Vane determines direction of the wind

Radiosonde a package of instruments that is carried aloft by balloons to measure upper atmospheric conditions

RADAR RAdio Detection And Ranging, a system that uses reflected radio waves to determine the velocity and location of objects Doppler Radar measures particle movement in storms

Weather Satellites Observations that can’t be made from the ground Wind speeds at cloud level

Weather Satellites http://www.nasa.gov/mpg/126449main_katrina_fred_animation.mpg

Computers Supercomputers can solve complicated mathematical problems quickly Store weather data

Weather Instruments Instrument Description and Use Thermometer Barometer Anemometer Wind Vane Radiosonde Radar Weather Satellite Computer