Weather is an all-encompassing term used to describe all of the many and varied phenomena that can occur in the atmosphere of a planet. The term is normally taken to mean the activity of these phenomena over short periods of time, usually no more than a few days in length. Average atmospheric conditions over significantly longer periods are known as climate. Usage of the two terms often overlaps and the concepts are obviously very closely related.

Basic mechanism

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Weather phenomena result from temperature differences around the globe, which arise mainly because areas closer to the tropics, around the equator, receive more energy from the Sun than more northern and southern regions, nearer to the Earth's poles.

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Weather - Twitter Search

#justbecause u from up north(New York) doesnt make u cooler than everyone from down south... only thing cool about New York is the weather.
Justusthegreat (Justin Moyer) Thu, 19 Nov 2009 19:09:59 -0000
#justbecause u from up north(New York) doesnt make u cooler than everyone from down south... only thing cool about New York is the weather.
Example twitter weather data 2:10 PM 49.1°F 98 pct 4.4 mph SE #wdisplay
jmogorunr (Joe Mogilski) Thu, 19 Nov 2009 19:09:58 -0000
Example twitter weather data 2:10 PM 49.1°F 98 pct 4.4 mph SE #wdisplay
Weather at the Grand Canyon this weekend? I might just head out their tonight. It's not possible for me to chill at home #fiestamovement
Mooncricket (Mooncricket) Thu, 19 Nov 2009 19:09:58 -0000
Weather at the Grand Canyon this weekend? I might just head out their tonight. It's not possible for me to chill at home #fiestamovement
Weather: "Rain-A-Fall" whens the last time you broke the routine of your day to bring p'leasure' to some1 No answer required. Just a thought
iamdjo (DJ O-nonymous) Thu, 19 Nov 2009 19:09:54 -0000
Weather: "Rain-A-Fall" whens the last time you broke the routine of your day to bring p'leasure' to some1 No answer required. Just a thought
JERRY SMITH -Interview "HAARP Weather Warfare" show by OTHER WORLD RADIO on #BlogTalkRadio - http://tobtr.com/s/742499
OtherWorldRadio (Other World Radio) Thu, 19 Nov 2009 19:09:50 -0000
JERRY SMITH -Interview "HAARP Weather Warfare" show by OTHER WORLD RADIO on #BlogTalkRadio - http://tobtr.com/s/742499
RT @editorssecret: Cole Haan – 30% off one cold weather accessory through 11/16. http://bit.ly/1hPagi via @AddToAny
giftomatic (Maggie V.) Thu, 19 Nov 2009 19:09:46 -0000
RT @editorssecret: Cole Haan – 30% off one cold weather accessory through 11/16. http://bit.ly/1hPagi via @AddToAny

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