[AZ-Observing] Saturday Forecast for Marathon

If you look outside now (noon), the obvious feature is thick, high clouds 
coming in from the south.  But here's where the transparency forecast on Clear 
Sky Clock actually looks encouraging for tonight.

The forecast model appears to be initialized very well, matching the current 
satellite image.  It shows the band of clouds about 200 miles wide moving 
rapidly to the north and east, and (hopefully) away from the Farnsworth Ranch 
site by 10 p.m.  Of course, there are several hours of uncertainty, so it will 
be interesting to see when it actually clears tonight.

For people at the site doing a two-nighter, the clouds are presently offering 
relief, keeping the daytime temperatures down in the chilly low-90's.

Tom
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