Weather “know your world”
Weather Weather Weather
What is Weather? The daily condition of the atmosphere. Includes temperature, precipitation, and wind.
What is Climate? Long term average weather
Density High Density Low Density Hot Air Warm Water Rises • Cold Air • Cold Water • Sinks http://www.weather.com/news/test-your-weather-trivia-20130502?pageno=6
Specific Heat Takes a long time to boil water to make pasta The concrete by the pool gets much hotter than the pool water How long it takes something to heat up Water =long time to heat up=high specific heat index
Top Influences of Weather Latitude Oceans & Ocean Currents Winds Pressure Topography & Elevation Air Masses
Latitude: distance north or south of the Equator, determines temperature zones and weather patterns
Gulf Stream: warm water current in the Atlantic Ocean, current goes south to north, takes warm water towards Europe
Pressure Wind blows from High pressure to Low pressure
Topography & Elevation Mountains and large landforms can affect the weather. Mountains: one side is very rainy and wet and the other side is a dry desert.
Air Mass • Air mas has same characteristics of the land or water it is over • If the land is cold and dry, then the air mass will be cold and dry • If the ocean is warm and moist, then the air mass will be warm and moist • Air masses can be cold or hot, dry or moist
Fronts • Weather fronts are on the edge or front side of a moving air mass • Fronts separate warm and cold air masses • For example: • A large cold air mass will have a cold front in front of it • A large warm air mass will have a warm front in front of it
Weather Fronts Animation http://www.phschool.com/atschool/phsciexp/active_art/weather_fronts/index.html Weather Map Symbols http://www.hpc.ncep.noaa.gov/html/fntcodes2.shtml
Cold Front moving through the Dallas area on Wednesday, April 18th, 2013 Tuesday, April 17th, had a high temperature of 87°, after the cold front moved through Wednesday, April 18th was 47°. It also stormed and rained the morning of the 18th (a common weather event with a cold front). The following few days had sunny skies and cool temperatures.
Des Moines Denver Kansas City Las Vegas Atlanta Dallas
What is a Tornado? Rotating column of air
…but actually Tornadoes occur in many other places including the Southeast and Midwest; there are many tornado alleys.