Pensacola clear sky chart

A meeting place of the Escambia Amateur Astronomers’ Association.
It’s the astronomer’s forecast. Luna pizza venice florida At a glance, it shows when it will be cloudy or clear for up to the
next two days. Best pizzeria in venice It’s a prediction of when Pensacola, FL, will have good weather for astronomical observing.

The data comes from a forecast model developed by Allan Rahill of the
Canadian Meteorological Center. Best pizza san marcos tx CMC’s numerical weather forecasts are unique because they are specifically designed for astronomers.
But they have 763 forecast maps. Best pizza san marcos ca It can be a chore to find the one you want.
So, I (Attilla Danko) wrote a script to generate the images like the one above
Summary: In the rows labeled “sky conditions”, find a column of blue blocks. 24 hour pizza delivery venice ca You can probably observe then.
different hour. Fratelli pizza venice fl menu The colors of the blocks are the colors from CMC’s forecast maps for that hour.
The two numbers at the top of a column is the time. Venice pizza sf ca A digit 1 on top of a 3 means 13:00 or 1pm. Venezia pizza leeds number It’s local time, in 24hr format.
The line, labeled Cloud Cover forecasts total cloud cover. Venice pizza leeds harehills The colors are picked from what color the sky is likely to be, with
Lighter shades of blue are increasing cloudiness and white is overcast. Venezia pizza leeds This forecast may miss low cloud and afternoon thunderstorms. Venice house north battleford pizza menu When the forecast is clear, the sky may still be hazy, if the transparency forecast is poor.
The line, labeled Transparency, forecasts the transparency of the air. Venice house pizza menu prince albert Here ‘transparency’ means just what astronomers mean
the total transparency of the atmosphere from ground to space. Venice house pizza menu warman It’s calculated from the total amount of water vapor in the
air. Venice pizza kirkstall road It is somewhat independant of the cloud cover forecast in that there can be isolated clouds in a transparent air mass, and poor transparency can occur
Above average transparency is necessary for good observation of low contrast objects like galaxies and nebulae. Venezia pizza kirkstall road However, open clusters
and planetary nebulae are quite observable in below average transparency. Venezia pizza kirkstall Large globulars and planets can be observed in poor
A forecast color of white formally means that CMC didn’t compute the transparency forecast because the cloud cover was over 30%. Venice pizza kirkstall phone number So it may
be possible to observe during a white transparency forecast, but the real transparency is usually yucky.
planets might look like they are under a layer of rippling water and show little detail at any magnification, but the view of galaxies is
turbulence combined with temperature differences in the atmosphere. Best pizza in san marcos tx This forecast attempts to predict turbulence and temperature differences that affect seeing for
Bad seeing can occur during perfectly clear weather. Pizza hut venice fl menu Often good seeing occurs during poor transparency. Pizza hut north venice fl It’s because seeing is not very related to the
The excellent-to-bad seeing scale is calibrated for instruments in the 11 to 14 inch range. Pizza hut venice fl coupons There are some more details in
No computer model forecasts convective heating well, so consider the seeing forecasts for daytime
hours to be less accurate. Venice pizzeria italian restaurant kannapolis nc Seeing is forecast for 3-hour blocks, so triples of seeing blocks will show the same color.
A white block on the seeing line means that there was too much cloud (>80% cover) to calculate it.
Note also that you may observe worse seeing though your telescope than what a perfect seeing forecast would predict. Venice pizza fleming island fl That is because
and ground seeing mimic true atmospheric seeing. Venice pizza fleming island menu You may also observe better seeing than predicted here when observing
The line labeled darkness is not a weather forecast. Venice pizzeria yorkville ny menu It shows when the sky will be dark,
Black is a dark sky. Venice pizza surrey bc menu Deep blue shows interference from moonlight. Venice pizzeria chesapeake va menu Light blue is full moon. Venice pizza chesapeake virginia Turquoise is twilight. Venice fl pizza hut Yellow is dusk and white
is daylight. Venice pizza indiana pa hours For those who prefer numbers, the scale is also calibrated. Venice beach pizza mohawk menu The numbers are the visual limiting magnitude at the zenith.
(The brightness of the faintest star a standard observer can see straight up.) Mouse over a darkness block for details.
calculations page. Venice beach pizza hamilton mohawk menu It takes into account the sun’s and moon’s position, moon phase, solar cycle and contains a scattering model of the atmosphere.
It doesn’t consider light pollution, dust, clouds, snow cover or the observer’s visual acuity. Pizza hut venice california So your actual limiting magnitude will often
This forecasts wind speed at about tree-top level. Pizza places in venice italy The wind forecast won’t determine whether or not you can observe,
but it may affect your comfort and the type observing you might be limited to. Venice beach pizza stoney creek menu In particular, long-focal length astrophotography, or observing with large
dobsonians require light wind conditions. Best pizzeria in venice italy High wind may be particularly dangerous for larger truss-tube dobsonians which must be disassembled in the
Humidity variations can indicate the likelihood of optics and eyepieces dewing.
But dewing is not simply correlated to relative humidity. Marco pizza venice fl menu Dewing tends to happen when the sky is clear, the temperature is dropping and there
isn’t much wind. Venice pizza kirkstall road number Being on a hilltop or in a small valley can make the difference between no dew and dripping telescopes. Pizza hut venice ca Unfortunately, the
humidity forecast does not have the spatial resolution to know about small hills, valleys, or observatory walls. Gluten free pizza venice ca All of which can reduce dewing.
A sudden spike in the humidity forecast, an hour or so after the cloud forecast predicts a sudden transition from cloudy to clear, when there is no wind, means that ground fog
Also, when the cloud forecast is opaque and the humidity forecast is 95%, rain is likely: a good time to cover the telescopes.
Since there are many different levels in this forecast, with similar looking colors, it’s best to activate the
“explain colors when you mouse over” to interpret the colors.
This forecasts temperatures near the ground. Pizza hut south venice fl While temperature variations won’t determine if you
can observe, the forecast can be handy choosing clothing for cold observing conditions. Venice beach pizza hamilton mohawk (In general, dress as if it were
20 degrees F or 10 degrees C colder than the forecast.) Observers with thick primary mirrors should take note of
falling temperature conditions because their mirrors may require additional cooling to reach equilibrium and so prevent
Cold temperatures also mean reduced battery capacity, stiffer lubricants, stiffer electrical cables and slower LCD displays.
Camera sensors will have reduced noise. Venice beach pizza hamilton But, in general, electronics have a lowest temperature at which they will work.
To see CMC’s full map for a particular hour, click on a colored block. Venice beach pizza hamilton ontario The CMC map your browser will load
will be the map closest to the hour you picked. Pizza near venice fl The time on the CMC map might look odd because it’s in GMT, while
If your website does not make money from ads and does not charge admission, then yes. Pizza hut in venice fl Please use this html:

Or, if you would prefer a simplified thumbnail:

Just keep using it. Venice pizza wallasey phone number I intend to keep updating this image for as long as CMC is willing to generate the underlying maps. Pizza venice altadena But there are ways
If you find this clear sky chart, or CMC maps linked by the colored blocks,
useful please send Allan Rahill of the CMC an email (and feel free to copy
You can also help keep clear sky charts free for everyone by being a sponsor. Venice pizza pittsburgh pa Please feel free to tell sponsors that they’re cool.
The techno-geek sectionPage updated by d800 at 2017-03-25 10:51:01 which is -5.0 hours from UTC.
Update rank: 435. New york pizza venice fl Thanks to anyone thinking of sponsoring this page.
Using coordinates: lat-long 30.4210 -87.21700; trans2: (509, 502); wind2: (510, 502); hum2: (509, 502); temp2: (509, 502); seeing2: (509, 502); cloud2: (400, 444)
Copyright 2017 A. New venice pizza menu elkins park Danko. New york style pizza venice fl Page updated 2017-03-25 15:51:01UT on server2.

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