Re: Need a measuring site for Coyote and Third Avenue

From: Ken Poulton (poulton@zonker.hpl.hp.com-DeleteThis)
Date: Thu Apr 28 1994 - 00:04:19 PDT


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Date: Thu, 28 Apr 1994 00:04:19 -0700
From: Ken Poulton <poulton@zonker.hpl.hp.com-DeleteThis>
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To: wind_talk@opus.hpl.hp.com-DeleteThis
Subject: Re: Need a measuring site for Coyote and Third Avenue


> I think it depends a lot on elevation as well, though. I mentioned the
> possibility of putting the gauge on top of Embassy Suites, and they seemed
> to think that the wind would be 10 knots higher up there (which may be
> okay, by the way, if the wind in the channel is also 10 knots higher than
> the lower elevation beach reading).

The wind may average a little higher at a higher elevation, but this
doesn't mean it will correlate any better with the wind beyond the wind
line.

> In theory they could put a small tower
> on top of the ASD building roof that would give them enough elevation to
> overcome the wind shadow caused by the peninsula that sticks out at the
> windward corner of the Coyote cove area.

Someone (COTW?) put a station on the Hertz car lot on that point,
which is pretty well out of any wind shadows, but is still not reliably
beyond the wind line. The wind line is caused by the shape of the
San Bruno gap, not by buildings.

> I suppose if someone really wants to make a science out of this you would
> need to do some experimenting and try to calibrate readings at different
> sites with the wind reported by the airport and NWS. Personally I wouldn't
> mind helping out on that experiment if someone knows where we could get the
> equipment on rental to record data for a few days.

You need data for months, preferrably years to make a meaningful
correlation. In any event, MicroForecasts would be the ones to have the
equipment.

> > I think we need to work out a remote sensor.
>
> Why even hassle with the bother of setting up your own?

You misunderstand me. I want to solve the problem so *they* can run it.
They don't have a solution, but at least they are in the business of
running such equipment.

I do hope that if we can figure this out that we can get them to set up
a network-accessable arrangement. Dialing in is a big pain in the ass
compared to automagic network retrieval.

> > > P.S. Micro Forecasts has offered to install a sensor at San Luis if the
> > > users can help raise half the cost ($500 of $1000).

Why would this be better than the existing one?

Ken Poulton
poulton@opus.hpl.hp.com-DeleteThis

"Mother, the WEATHER is not a PRETTY THING." --Bill Griffith



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