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To much of a good thing: the "heat bubble"
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windfind



Joined: 18 Mar 1997
Posts: 701

PostPosted: Mon May 13, 2013 9:50 am    Post subject: To much of a good thing: the "heat bubble" Reply with quote

Gang,

Below is some imagery about the dreaded Southern California "heat bubble" that struck yesterday at some sites and will probably do the same today. In the images watch the "heat bubble" ooze out from the interior and over the coast. Then watch what it does to the wind graphs.

If you want to get the details head to the Weather Blog at:

http://blog.weatherflow.com/?p=13940

Or use the Weather Blog link in the left column of most pages.

Mike Godsey
iwindsurf.com/ikitesurf.com



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zirtaeb



Joined: 03 Jul 2009
Posts: 2147

PostPosted: Mon May 13, 2013 10:24 am    Post subject: Reply with quote

You want a "bubble", try hanging around at Berkeley for a week.
That "bubble could easily cause 5-12 mph gusty holey breeze at the Basin while upwind of the Lordships can be solid 19-26mph.
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victor



Joined: 03 Aug 1998
Posts: 525

PostPosted: Mon May 13, 2013 11:30 am    Post subject: Reply with quote

don't think it would take a week to experience the berkeley bubble. more like any day between 3 & 4.
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windfind



Joined: 18 Mar 1997
Posts: 701

PostPosted: Mon May 13, 2013 11:54 am    Post subject: Reply with quote

The Berkeley "bubble" is really not a "heat bubble" effect on most days. The causes of the The Berkeley "bubble" are a lot more complex and harder to forecast. But this Berkeley "bubble" is what makes the Hs. Lordships roof sensor seem so accurate sometimes and so inaccurate at other times.

Mike
iwindsurf.com
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cbknap



Joined: 03 Jun 1997
Posts: 294

PostPosted: Mon May 13, 2013 1:42 pm    Post subject: Reply with quote

That's interesting Mike. What's the pressure on either side of that isobaric line?
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windfind



Joined: 18 Mar 1997
Posts: 701

PostPosted: Mon May 13, 2013 3:45 pm    Post subject: Reply with quote

I did not record the actual pressures. Remember that the lines really do not reflect the reality that there is a gradient between each line not a sudden drop in pressure. It would be interesting to have someone drive with a recording barometer from the interior to the coast on "heat bubble" day.

Mike
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capetonian



Joined: 11 Aug 2006
Posts: 886
Location: Oahu

PostPosted: Mon May 13, 2013 5:06 pm    Post subject: Reply with quote

Wow, Cabrillo is 28 mph gusting to 32 right now.

@#$%# Mondays!!!
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zirtaeb



Joined: 03 Jul 2009
Posts: 2147

PostPosted: Mon May 13, 2013 5:45 pm    Post subject: Reply with quote

The "Berkeley Heat Bubble, while world famous, must be caused by all the hot air circulating amongst the windsurfer's who show up and get skunked.
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dabull1



Joined: 19 Mar 1997
Posts: 511

PostPosted: Tue May 14, 2013 12:05 am    Post subject: Reply with quote

10:04 pm Leo still averaging 20.5 WNW....WHERE'S A FULL MOON!!!! Bull
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stevenbard



Joined: 11 Nov 1993
Posts: 3627

PostPosted: Tue May 14, 2013 12:13 am    Post subject: Reply with quote

dabull1 wrote:
10:04 pm Leo still averaging 20.5 WNW....WHERE'S A FULL MOON!!!! Bull


It was smoking today at Secos! It went from cool to hot and back to cool on the water today. You could feel the heat bubble trying to take over.

This is like the middle of summer. 63 degree water, and thermals blowing all day. PS> at 10:15 it's 25 mph with gusts to 30!!!!

Capetonian, that's why they call Cabrillo "Hurricane Gulch". I hope it's like this for the races this summer.
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