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Meet Eddy! The new weather landlord of the Pacific?
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windfind



Joined: 18 Mar 1997
Posts: 1525

PostPosted: Tue May 07, 2019 7:06 pm    Post subject: Meet Eddy! The new weather landlord of the Pacific? Reply with quote

Hi Gang.

The satellite imagery below from today really shows Eddy in action. If you work the waters north of the Bay Bridge Eddy looks beautiful. But if the Peninsula or the coast is your home Eddy looks malevolent in this imagery.

For many decades the North Pacific High and its NW wind have dominated the Pacific west of California each spring. Sure, the North Pacific High took brief vacations to the south each time a storm arrived but like clockwork would pop back into place bringing NW clearing winds.

This year we have seen the near constant presence of an eddy off the greater Bay Area. Several times the eddy has almost died only to reappear along with southerly winds on the coast and much of the Bay.

Ironically, the eddy is created in large part by the North Pacific High being way too far north for this time of year.

What is causing the eddy? The proximal causes are easy. The North Pacific High has been aligned at an angle to the west coast so its normal NW winds are more NNW + there has been a near constant low pressure just to the north of the Bay Area. (This has also lead to a long period of unusually warm temperatures in the Gorge)

But why is the eddy so early and so persistent? Watch for a future blog on factors involved in the ultimate causation of the North Pacific High's position and the eddy.

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



EddyDawn2019-05-07 17_04_55.gif
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dvCali



Joined: 23 Aug 2007
Posts: 1006

PostPosted: Wed May 08, 2019 10:42 am    Post subject: Re: Meet Eddy! The new weather landlord of the Pacific? Reply with quote

Another reason to leave the Bay Area ... the obliteration of San Francisco is now followed by the disappearance of the wind Shocked Shocked Shocked Shocked
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windfind



Joined: 18 Mar 1997
Posts: 1525

PostPosted: Wed May 08, 2019 1:13 pm    Post subject: Reply with quote

Hi dvCali,

It is not quite that bad.

In the spring and summer, the North Pacific High often covers more than 2,000,000 square miles. While the eddy is usually under 100 square miles.

So the NPH and the eddy are like an elephant and a flea. Except in recent weeks, the elephant has positioned his rump so that the flea is trapped just off the coast of the San Francisco Bay Area. Sooner or later the elephant will stir and the flea will be history... for a while.

The real issue can be seen in the graphic below. As spring turns to summer the North Pacific High's average location shifts northward. So our window of time for strong NW wind on our coast and the Peninsula is shrinking each day the eddy spins.

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



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rigatoni



Joined: 25 Feb 1999
Posts: 419

PostPosted: Thu May 09, 2019 7:00 pm    Post subject: Reply with quote

Good ski season is almost always followed by a crappy windsurfing spring. The spring skiing at Squaw right now is pretty awesome (almost 200" of snow still on the ground at mid mountain) so I would recommend making a little lemonade out of the lemons for the time being.
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gerritt



Joined: 06 May 1998
Posts: 578
Location: Redwood City, CA

PostPosted: Fri May 10, 2019 1:32 pm    Post subject: Reply with quote

The surf lately has been decent as well. And we had a good winter and early spring on the coast for windsurfing too. Now bring back my NW wind! My arms are tired.
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boggsman1



Joined: 24 Jun 2002
Posts: 7095
Location: at a computer

PostPosted: Fri May 10, 2019 2:01 pm    Post subject: Reply with quote

rigatoni wrote:
Good ski season is almost always followed by a crappy windsurfing spring. The spring skiing at Squaw right now is pretty awesome (almost 200" of snow still on the ground at mid mountain) so I would recommend making a little lemonade out of the lemons for the time being.


That's right...I'm not complaining too much about the lack of NW 30+, when an epic ski season is still going!!!!
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jse



Joined: 17 Apr 1995
Posts: 1372
Location: Maui

PostPosted: Thu May 23, 2019 6:09 pm    Post subject: Reply with quote

Meantime we're in a wind drought in Maui. I've taken advantage of the south swell for some nice glassy surfing.
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MalibuGuru



Joined: 11 Nov 1993
Posts: 8271

PostPosted: Fri May 24, 2019 1:18 am    Post subject: Reply with quote

It's been really good down here
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dvCali



Joined: 23 Aug 2007
Posts: 1006

PostPosted: Fri May 24, 2019 10:48 am    Post subject: Reply with quote

windfind wrote:
Hi dvCali,

It is not quite that bad.

...


Well actually it is, and it is back... there has been bad seasons in the 33 years I have been here but this one really stands out! Shocked
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dllee



Joined: 03 Jul 2009
Posts: 4324
Location: East Bay

PostPosted: Fri May 24, 2019 11:37 am    Post subject: Reply with quote

Great wind in the East Bay, hardly ever light enough to windfoil. 5,0 used most.
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