Received: from zonker-fddi.hpl.hp.com by opus.hpl.hp.com with SMTP (1.37.109.8/15.5+ECS 3.3+HPL1.1) id AA02207; Thu, 4 May 1995 13:56:06 -0700 Return-Path: <poulton@zonker.hpl.hp.com-DeleteThis> Received: by zonker.hpl.hp.com (1.37.109.8/15.5+ECS 3.3+HPL1.1) id AA13255; Thu, 4 May 1995 13:56:01 -0700 Date: Thu, 4 May 1995 13:56:01 -0700 From: Ken Poulton <poulton@zonker.hpl.hp.com-DeleteThis> Message-Id: <9505042056.AA13255@zonker.hpl.hp.com-DeleteThis> To: wind_talk@opus.hpl.hp.com-DeleteThis Subject: Re: Tue sailing at 3d
> Anyone sail yesterday (Wednesday)? My COTW pager was showing averages
> at Coyote in the 13-15mph range, but straight west. The SFO reports
> were averaging 20knots. Must have been a big wind shadow.
You can see it turn westerly in yesterday's data:
95/05/03-1450 SFO 63 51 300 14 . 15 29.97 200 -ovc / sc vcnty
95/05/03-1550 SFO 60 51 290 16 . 15 29.96 e200 ovc / sc vcnty
95/05/03-1650 SFO 58 50 280 20 . 15 29.95 e200 ovc / sc vcnty
95/05/03-1750 SFO 57 50 270 20 . 15 29.95 13 sct 25 sct 160 sct
When the direction gets down to 280 at SFO, the wind line tends to be
well offshore - maybe by the flight lanes. The on-shore COTW sensor
will read much lower. When it gets to 270, Coyote is quite shadowed.
Note that voice reports from SFO use magnetic directions, which would
be smaller numbers by 20 degrees.
Ken Poulton
poulton@opus.hpl.hp.com-DeleteThis
"Contrariwise", continued Tweedledee, "If it was so, it might be;
and if it were so, it would be; but as it isn't, it ain't. That's logic."
-- Lewis Carroll
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