Current Radar or Satellite Image

Flhurricane.com - Central Florida Hurricane Center - Tracking Storms since 1995Hurricanes Without the Hype! Since 1995


The Atlantic is quiet
Days since last H. Landfall - US: Any 46 (Milton) , Major: 46 (Milton) Florida - Any: 46 (Milton) Major: 46 (Milton)
None
COMMUNICATION
STORM DATA
CONTENT
FOLLOW US
 

You are not logged in. [Login] Other Forums · Search · Active Topics
New user · Who's Online · FAQ · Rules · Calendar

General Discussion >> Hurricane Ask/Tell
Previous thread Previous   View all threads Index   Next thread Next   Flat Mode Flat  

LI Phil
User


Reged:
Posts: 2637
Loc: Long Island (40.7N 73.6W)
Re: Coriolis
      Wed Aug 25 2004 02:04 PM

Geostrophic Wind: winds balanced by the Coriolis and Pressure Gradient forces.

An air parcel initially at rest will move from high pressure to low pressure because of the pressure gradient force (PGF). However, as that air parcel begins to move, it is deflected by the Coriolis force to the right in the northern hemisphere (to the left on the southern hemisphere). As the wind gains speed, the deflection increases until the Coriolis force equals the pressure gradient force. At this point, the wind will be blowing parallel to the isobars. When this happens, the wind is referred to as geostrophic.

Winds in nature are rarely exactly geostrophic, but to a good approximation, the winds in the upper troposphere can be close. This is because winds are only considered truly geostrophic when the isobars are straight and there are no other forces acting on it -- and these conditions just aren't found too often in nature.

--------------------
2005 Forecast: 14/7/4

BUCKLE UP!

"If your topic ain't tropic, your post will be toast"

Post Extras Print Post   Remind Me!     Notify Moderator


Entire topic
Subject Posted by Posted on
* Question about Hurricane Alex Keith234 Wed Aug 25 2004 02:04 PM
. * * Re: Question about Hurricane Alex LI Phil   Tue Aug 24 2004 06:01 PM
. * * Re: Question about Hurricane Alex Keith234   Tue Aug 24 2004 06:19 PM
. * * Re: Question about Hurricane Alex Clark   Tue Aug 24 2004 07:42 PM
. * * Re: Question about Hurricane Alex LI Phil   Tue Aug 24 2004 09:43 PM
. * * Re: Coriolis Ed DunhamAdministrator   Tue Aug 24 2004 10:11 PM
. * * Re: Coriolis Keith234   Wed Aug 25 2004 08:53 AM
. * * Re: Coriolis LI Phil   Wed Aug 25 2004 02:04 PM
. * * Geostrophic Winds Keith234   Wed Aug 25 2004 09:29 PM
. * * Re: Geostrophic Winds LI Phil   Wed Aug 25 2004 09:33 PM
. * * Re: Geostrophic Winds Clark   Wed Aug 25 2004 10:27 PM
. * * Re: Question about Hurricane Alex Keith234   Tue Aug 24 2004 09:55 PM
. * * Re: Question about Hurricane Alex Keith234   Tue Aug 24 2004 08:52 PM

Extra information
0 registered and 8 anonymous users are browsing this forum.

Moderator:  



Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 7371

Rate this thread

Jump to

Note: This is NOT an official page. It is run by weather hobbyists and should not be used as a replacement for official sources. 
CFHC's main servers are currently located at Hostdime.com in Orlando, FL.
Image Server Network thanks to Mike Potts and Amazon Web Services. If you have static file hosting space that allows dns aliasing contact us to help out! Some Maps Provided by:
Great thanks to all who donated and everyone who uses the site as well. Site designed for 800x600+ resolution
When in doubt, take the word of the National Hurricane Center