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Weather forecasting is the application of current technology and science to predict the state of the atmosphere for a future time and a given location. The history of weather forecasting goes back millennia, however the techniques used have changed significantly since then. Today, weather forecasts are made by collecting as much data as possible about the current state of the atmosphere (particularly the temperature, humidity and wind) and using understanding of atmospheric processes (through meteorology) to determine how the atmosphere evolves in the future. However, the chaotic nature of the atmosphere and incomplete understanding of the processes mean that forecasts become less accurate as the range of the forecast increases.

History of weather forecasting


Many people's livelihoods and indeed lives are strongly influenced by the weather. In the past, this was probably more true than it is today. For millennia people have tried to predict what the weather would be like a day or a season in advance. In 650 BC, the Babylonians predicted the weather from cloud patterns. In about 340 BC, Aristotle described weather patterns in Meteorologica. The Chinese were predicting weather at least as far back as 300 BC.

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National Oceanic and Atmospheric Administration :: Department of Commerce
Meteorology :: Earth Sciences

 
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The Weather Channel: National Weather Outlook

Current Weather Conditions Across The 48 Contiguous United States
Wed, 16 Dec 2009 13:14:02 -0500
More heavy rain, mountain snow in Northwest. For more details...
Your National Forecast Summary
Tue, 10 Mar 2009 13:44:02 -0400
Midwest - However, due to the intense nature of the surface low it will continue to impact the region with strong winds, ... South - A cold front will push into the region by Wednesday morning with much of the rain unlikely to push east ... Northeast - The lone exceptions will be portions of New England and Upstate New York where a wintry mix of freezing rain, ... West - The lone exception may be the Sierra Nevada where some rain or snow showers will be possible with an upper-level ... For more details...
Video: Your 3-Day National Weather Forecast
Wed, 16 Dec 2009 13:14:02 -0500
Watch what the experts at The Weather Channel ® have to say about the weather trends in the United States for the next 3-days.
Severe Weather Alerts Across The Nation
Wed, 16 Dec 2009 13:14:02 -0500
Alabama-Alaska-Arkansas-California-Connecticut-Delaware-District Of Columbia-Dummy-Federated States Of Micronesia-Florida-Georgia-Hawaii-Idaho-Illinois-Indiana-Kansas-Kentucky-Louisiana-Maine-Maryland-Massachusetts-Michigan-Mississippi-Missouri-Montana-New Jersey-New York-North Carolina-Ohio-Oregon-South Carolina-Tennessee-Texas-Vermont-Virginia-Washington. For more details...
Airport Impact Map
Wed, 16 Dec 2009 13:14:02 -0500
A visual representation of possible weather-related delays at 24 major airports across the United States including Chicago's O'Hare, Boston's Logan, Atlanta's Hartsfield-Jackson, Dallas/Fort Worth Int', and Los Angeles Int'l. For more details...
ADV: Take the Weather with You
Wed, 16 Dec 2009 13:14:02 -0500
The Weather Channel® understands that you need access to weather information on the go. Whether you're a business traveler or an avid weekend golfer, our mobile products and services will keep you prepared for anything Mother Nature has in store. For more details...

AccuWeather.com Weather Headlines

More Lake-Effect Snow
Gusty winds and cold temperatures are again accompanying a round of lake-effect
South Briefly Dry Today
High pressure building in from the north will give the South a much needed
What's Up with that East Coast Storm
There is really nothing complicated about it at all. Either the storm comes up
Christmas Week Cold, Possibly Snowy
"I'm Dreaming Of A White Christmas." All I can say is that many of you may get
South Texas Staying Wet
Light rain has fallen across southern Texas over the past several days, and
Storm Slamming Northwest
Today marks the arrival of one of several storms set to slam into the Northwest through the weekend. Rain, mountain snow and gusty winds will

 
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