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

---

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.

More on [ Weather ]

azcentral.com | news

1 killed in collision on Loop 202 in Mesa
Beth Duckett Sat, 06 Sep 2008 09:30:40 -0700
Eastbound lanes of Loop 202 were closed for about eight hours at Power Road Saturday morning in Mesa while officials investigated a two-vehicle collision that killed one person.
Latino youths speak out on being Hispanic in America
Sat, 06 Sep 2008 08:00:00 -0700
This year, Republic reporters and editors in the Southeast Valley decided to mark Hispanic Heritage Month by putting ourselves on the sidelines and turning over the paper to those we don't hear from often enough.
Goddard: Building near military sites threatens safety, economy
David Madrid Sat, 06 Sep 2008 07:00:30 -0700
Arizona Attorney General Terry Goddard said that by issuing building permits in restricted zones near military installations, Maricopa County threatens public safety and endangers the economic well-being of the entire state.
Movie cast, crew to visit Gilbert museum
Chelsea Schneider Sat, 06 Sep 2008 08:00:00 -0700
Trailer of Arizona-based film Jake's Corner will be shown at Gilbert Historical Museum.
Mayor pays price for going out on limb
Casey Newton Sat, 06 Sep 2008 08:00:25 -0700
Behind every man who injures himself doing yard work is a wife shaking her head said saying, ''Honey, I told you so.''
Dad, daughter firefighters make history in Tucson
Ryn Gargulinski Sat, 06 Sep 2008 07:59:07 -0700
TUCSON - Christa Clayton had a burning desire to follow in her father's footsteps.

Subscribe to Arizona RSS feed