4WX.com - Online Weather Information Center
4WX Internet Search
     
  
ABC.NET Search Portal
Weather Info
Your default weather location
(Set your options)
American Weather
Canadian Weather
International Weather
Weather Maps
US Satellite View Maps
Glossary of Weather Terms
4WX Weather Calculators and converters
CupidLove Free matchmaking portal!
Temp. Converter
  Celsius:
     Fahrenheit:
  
  Enter your "Place, State", US Zip Code or ICAO:   
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Obliquity of the Ecliptic - the orbital element that determines the amplitude of the seasonal variation of incident solar radiation. The present value is 23°2' to 24°27'.

Obscuration - the term used when the sky is completely hidden by surface-based obscuring phenomena

Obscuring Phenomena - any atmospheric phenomenon, except clouds, that restricts vertical visibility (e.g., dust, rain, snow, etc.).

Occluded Front - the front formed by a cold front overtaking a warm or stationary front and lifting the warm air above the earth's surface

Occluded Mesocyclone - A mesocyclone in which air from the rear-flank downdraft has completely surrounded the circulation at low levels, cutting off the inflow of warm unstable low-level air

Orographic Lift - the lifting of air caused by its passage up and over mountains or other sloping terrain

Outflow Boundary - a storm-scale or mesoscale boundary separating thunderstorm-cooled air (outflow) from the surrounding air

Overcast - sky cover classification describing a sky with 95% or more cloud cover

Overhang - a radar term indicating a region of high reflectivity at middle and upper levels above an area of weak reflectivity at low levels. The overhang is found on the inflow side of a thunderstorm (normally the south or southeast side).

Overshooting Top (or Penetrating Top) - a dome-like protrusion above a thunderstorm anvil; it represents a very strong updraft and, hence, a higher potential for severe weather with that storm. A persistent and/or large overshooting top often is present on a supercell.

Oxygen - in its free form, a colorless, tasteless, and odorless gas in the atmosphere of which it forms about 21% by volume

Ozone - a triatomic form of oxygen that is nearly colorless gas of pungent odor; it is formed naturally in the upper atmosphere, generally between the heights of about 10 and 50 km and it results in the absorption of a large part of the sun's most intense incoming radiation

 

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
Copyright © 2004 4WX.com, all rights reserved. - Part of the ABC.NET Network!
Weather Disclaimer - Terms of use -

Partners: Nomoz Directory | All Whois | Free Classifieds | Stamps | Whois | Domain Registree | Kool Branding | Private Search | Yallaa