[AZ-Observing] Fwd: 2013 nighttime cloudiness

From: Tom Polakis <tpolakis@xxxxxxx>
To: AZ-Observing@xxxxxxxxxxxxx
Date: Thu, 2 Jan 2014 11:02:10 -0500

Brian Skiff's nighttime cloudiness summary for 2013 is here:

http://www2.lowell.edu/Research/cloudiness_data/clouds/2013/annual.sum


Or you can search for summaries for every month since January of 1979 at this 
site:

http://www2.lowell.edu/Research/cloudiness_data/clouds.html


Tom


> Subject: 2013 nighttime cloudiness
> From: Brian Skiff <bas@xxxxxxxxxx>
> To: Tom Polakis <tpolakis@xxxxxxx>
> Date: Wed, 1 Jan 2014 00:45:26 -0700
> 
>      Since all the winter months this year (beginning and
> end) had lots of clear nights, the long nighttime hours
> made the number of clear hours by my reckoning set a new
> record for the 35-year string:  about 1500 clear hours,
> with ~675 of them in the Sep-Dec trimester.  The 35-year
> average is 1116 hours +/- 136 (sigma).  I tallied 112 full
> 'photometric' nights, which is a solid +1 sigma result.
> That mean stays at 93 nights +/- 18 per year.
> 
> 
> \Brian
> 
> 

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[AZ-Observing] Fwd: 2013 nighttime cloudiness

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