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Convergent winds aloft and today's NW wind

 
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windfind



Joined: 18 Mar 1997
Posts: 1497

PostPosted: Tue Apr 09, 2019 9:09 am    Post subject: Convergent winds aloft and today's NW wind Reply with quote

Hi Gang,

It is looking like the I made forecast last week for strong NW Tuesday, April 9 is coming true!

One key to forecasting such wind in advance is to look for patterns of convergence and/or divergence of the winds way aloft.

The simple animation below shows you the sort of convergence happening way aloft today that is jazzing up our surface wind.

In the convergence zone, air molecules are being crammed into a smaller air so the air is denser and heavier so it moves towards the surface. This enhances the North Pacific High and indirectly the NW wind.

Now, look at the Divergence zone in the imagery. Who can figure out what that divergence will do to the low pressure in the Great Basin that is supporting our strong wind?

For details here is a blog about convergence and divergence:

http://blog.weatherflow.com/west-coast-wind-blog-how-winds-aloft-impact-the-strength-of-the-north-pacific-high/

Mike Godsey
iwindsurf.com/ikitesurf.com
Weatheflow.com



Convergence&SurfaceNPH.gif
 Description:
 Filesize:  1.31 MB
 Viewed:  2156 Time(s)

Convergence&SurfaceNPH.gif


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windfind



Joined: 18 Mar 1997
Posts: 1497

PostPosted: Wed Apr 10, 2019 11:32 am    Post subject: Reply with quote

Hi Gang,

Here is a quick recap of yesterday's winds and why this NW blow will not fade as fast as the typical NW clearing wind event:

http://blog.weatherflow.com/west-coast-wind-blog-how-the-nph-and-convergence-aloft-helped-jazz-up-our-surface-nw-wind/

Mike Godsey
iwindsurf.com/ikitesurf.com
Weatheflow.com



windmapAniWCWB BIG NW.gif
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 Filesize:  291.86 KB
 Viewed:  1951 Time(s)

windmapAniWCWB BIG NW.gif


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