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.
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 Reports
Weather :: North America
Meteorology :: Earth Sciences
Natural Disasters and Hazards :: Earth Sciences

911Weather - Provides notification via fax, e-mail or pager of real-time National Weather Service watches and warnings.
AccuWeather - Over 45,000 US locations available by zip code. There are also a large number of forecasts for locations around the world.
Meta Description: [ Weather Forecasts from AccuWeather.com. Includes hurricane weather, world weather and local weather forecasts plus radars, news & weather maps. ]
America's Weather - Where to go for weather radar, satellite, difax, forecasts, snow maps, lightning, surface maps, warnings, upper air maps, news, tropical weather. Get your states weather information local forecasts, state warnings and watches zone forecasts, summaries.
Meta Description: [ Tropical Storm Debby Track maps and information and Weather and Weather Forecasts also local radar and weather warnings. ]
EarthWatch - Weather On Demand - The first 3D weather web site giving you continuously updated satellite, radar, forecasts and 3D fly-throughs. StormWatch severe weather watches, warnings advisories updated every 10 minutes.
Meta Description: [ The first weather web site giving you continuously updated
satellite, radar, and forecasts. StormWatch severe weather watches, warnings & advisories updated every 10 minutes. ]
Find Local Weather - Look up weekly forecasts by city or zip code.
Meta Description: [ Find Local Weather, local, national and international forecast search. Get quick and accurate local forecasts. Clear and concise weather forecasts and maps with no pop-up or pop-under ads. ]
Integrated Surface Irradiance Study - Offers updated Sun radiation data from U.S. network of stations.
Meta Description: [ Earth System Research Laboratory ]
Lightning Explorer - Vaisala Inc. - Map of the 48 contiguous states shows the locations of lightning strikes over the past two hours.
Live Weather Images - This site pulls together the best and most frequently accessed weather data on the Internet, and puts it all into one easy to use page.
Meta Description: [ This site pulls together the best and most frequently accessed weather data on the Internet and puts it all into one easy to use site with weathercams, radar and satellite images, forecasts, and a message board. ]
National Environmental and Meteorological Association, Inc. - Organization engaged in the dissemination of severe weather information, primarily in the northeastern states. Site also includes long-range forecasts for the region.
National Weather Service Internet Weather Source - Starting point for official government weather forecasts, warnings, and meteorological products for forecasting the weather.
Meta Description: [ Government Internet Service Home page. The starting point for official governemnt weather forecasts, warning, and meteorological products for forecasting the weather. ]
Qwikcast.com - Interactive weather site providing worldwide weather information to help plan the day, week, month.
Meta Description: [ A quick, easy to use, source of forecasts, current conditions, climate and weather maps for 64,000 locations worldwide. ]
The Old Farmer's Almanac Long-range Weather Forecasts - A folksy approach to weather that has been around for over 100 years.
Meta Description: [ Since 1792, The Old Farmer's Almanac has published useful information for people in all walks of life: tide tables for those who live near the ocean; sunrise tables and planting charts for those who live on the farm; recipes for those who live in the kitchen; and forecasts for those who don't lik... ]
The Weather Channel - Offers forecasts for cities worldwide as well as radar and satellite maps. Also includes news stories and allergy information.
Time and Weather - Weather for over 25,000 US locations by zip code or city name. Site includes timezones, current weather conditions, international weather, UV forecasts, radar maps, watches and warnings.
Meta Description: [ Time and weather related information for over 25,000 cities in the US, Canada and world. ]
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UM Weather - The University of Michigan at Ann Arbor's weather lab is among the pioneers of online weather products, including the excellent Weather Underground site.
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Weather History - CityRating.com - Weather history data including temperature, relative humidity, precipitation, cloudiness and weather extremes in tabular and graphical formats.
Meta Description: [ Weather history data including temperature, relative humidity, precipitation, cloudiness and weather extremes in tabular and graphical formats. ]
Weather Underground - Forecasts for cities, states and regions; U.S. weather maps, including radar maps, satellite imagery, fronts, and UV forecasts; and extensive related information.
Weather Watch, Warning and Advisory Display - National Weather Service Storm Prediction Center severe weather information.
Meta Description: [ Severe weather information from the Storm Prediction Center. ]
Weatherbug - Free downloadable software provides your local weather forecast and weather report.
Meta Description: [ Live weather forecasts, including Doppler radar, storm alerts, and local weather reports from WeatherBug. ]
WeatherLook.net - A fast look at updated weather forecast and conditions by state.
Meta Description: [ How To Find Weather forecasts,reports and liveweather cam looks of all 50 states. ]
weatherOnline! - Weather forecasts reports and graphics for the US by entering city and state or zip code.
WeatherPages.com - Weather forecasts and conditions by region, state and city.
WeatherRoom - Weather maps, forecasts, and information for the United States and Canada.
Meta Description: [ White Pages and Free People Search. Reverse Phone Lookup to find the name and address behind a phone number. ]
WeatherUSA.net - Weather information for the United States, including current conditions, lightning data, forecasts, SkyCams, weather warnings.
Meta Description: [ Provides live weather conditions, weather cams, real-time lightning,
a personalized forecast center, weather maps, and warnings for locations in the United States. ]
WeatherVision - Streaming video forecasts for U.S. cities. TV weather forecasts on demand.
Wx.com - Weather experts providing 3-D weather radar and satellite images, national weather headlines and customized weather forecasts.
WXnation - A compilation of links to Doppler radars, traffic and live cams, as well as local weather forecasts and airport delays for the major US cities.
Meta Description: [ America's Live Weather Station: Your city's weather radar, streaming and live webcam resource, plus traffic and your local weather forecast. ]
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WxUSA - Weather links for 1500 US cities.
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