Skip to NavigationSkip to Content
Image that reads Storm-E Weather Simulation that links to the Storm-E home page.
Button that takes you to Students.Button that takes you to Teachers.Button that takes you to Weather Extra.Button that takes you to Links.Button that takes you to Images.
Image that reads Students.
Teams
Air Pressure  
Humidity  
Temperature  
Wind  
Help

Air Pressure Team

Home | Fast Facts | Picture Help | Maps and Graphs

Fast Facts for the Air Pressure Team

  1. The readings are in millibars (mb). The average sea-level pressure is 1013.25 mb.
  2. Isobars are lines connecting places of equal air pressure.
  3. Air pressure changes help predict local weather. Rising air pressure usually means fair weather. Falling air pressure generally means stormy weather.
  4. On a weather map "H" shows the relative high pressure ("happy weather") and "L" shows the relative low pressure ("lousy weather"). These pressure readings are relative. That means there is no certain number that divides high from low.
  5. Low pressure surface winds, viewed from above in the Northern Hemisphere, blow counterclockwise and inward.
  6. High pressure surface winds, viewed from above in the Northern Hemisphere, blow clockwise and outward.

© 2005 by Wheeling Jesuit University/Center for Educational Technologies®. 316 Washington Ave., Wheeling, WV, 26003-6243. All rights reserved. Privacy Policy and Terms of Use.

Some images copyright © 2004 www.clipart.com.