Re: Wind guaging at Rio Vista

From: Will Estes (westes@usc.com-DeleteThis)
Date: Fri Jul 21 1995 - 09:43:32 PDT 

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From: Will Estes <westes@usc.com-DeleteThis>
Message-Id: <9507211643.AA11079@usc.com-DeleteThis>
Subject: Re: Wind guaging at Rio Vista
To: wind_talk@opus.hpl.hp.com-DeleteThis
Date: Fri, 21 Jul 1995 09:43:32 -0700 (PDT)
In-Reply-To: <9507210926.ZM19636@shredder.engr.sgi.com-DeleteThis> from "Bob Prevett" at Jul 21, 95 09:33:24 am
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'Bob Prevett says:'
> OK, so I understand the basic regional conditions required for wind at Rio
> Vista: thick marine layer, fog spreading across bay to Oakland. To see how
> strong the wind really is, I've been using two sources: the WindCraft windtalker
> line at 916-777-7007 and the Travis_AFB entry from the Ken Poulton wind report.
>
> My problem is that whenever I call the wind talker to see if the morning and/or
> the afternoon session is happening, the wind really doesn't seem that strong.
> For example, right now (Friday 9am) the windtalker says wind ranging from 12 to
> 26 mph, averaging southwest at 18. The Travis_AFB entry from the Ken Poulton
> wind report is similar: 230 degrees at 18 mph, although the time stamp is 0455.
>
> How well do the wind talker and Travis_AFB data correlate to the real wind on
> the water?

The best measure is pressure differential between Sacramento and San
Francisco. You can get that from Ken's report. If you see strong
pressure differences, combined with just okay wind reports from the
wind data, and fog heavily inland, it's a sure bet. If pressure is
weak, I tend to be skeptical, even if the windtalkers are above 20
mph. 

-- 
Will Estes                              U.S. Computer
Internet: westes@usc.com-DeleteThis                POB 3150
                                        Saratoga, CA  95070
                                        FAX: 408-446-1013

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