Astronomical weather forecast

gchew · Post by **gchew** » Wed Jan 25, 2006 12:16 am

Here's a site that I thought might be of interest to amateur astronomers:

http://csc.lamost.org/eng/index.htm

and this is the page for Singapore:

http://csc.lamost.org/eng/clocks/singapore.htm

This is based on the original Clear Sky Clock at http://www.cleardarksky.com/csk/ . Somewhere else on the site, something is said about 7Timer using a weather data set different from what the original CSC uses, and so prediction accuracies are only at 60-70%. Nevertheless, it might still be useful to see reliable these predictions are for local observing sessions

Tachyon · Post by **Tachyon** » Wed Jan 25, 2006 9:21 am

Thanks for the info! If I read it correctly, this weekend should be clearing up!

chrisyeo · Post by **chrisyeo** » Fri Feb 10, 2006 10:22 pm

I have been following the cloud cover forcast of this site for the past 3 weeks and I must say that it has so far exceeded my expectations! It really does give quite an accurate forcast of whether and when exactly the sky will be clear. I check it now to plan my observation sessions in Singapore.

Thanks a lot for sharing the link, gchew!

Might I also recommend 'sticky'-ing this link for the benefit of others if it proves to be a useful and accurate website.

Cheers,
cy

rlow · Post by **rlow** » Sat Feb 11, 2006 2:05 pm

Wish it also includes a weather forcast for Mersing...

Jin Peng · Post by **Jin Peng** » Sat Feb 11, 2006 2:37 pm

yup, this website does help alot for my practical session. Thanks alot, i had link it to RPASTRO webby liao for the benefical for others =)

~RPASTRO~

klutz · Post by **klutz** » Sat Feb 11, 2006 7:47 pm

Hi, How do you actually read the table? Why are there so many duplicate digits under "Local Time"...?

Regards,
Kat

jermng · Post by **jermng** » Sat Feb 11, 2006 7:54 pm

Those are the times - 2am, 5am, 8am, 11am, 1400hrs(2pm) etc the bigger white numbers on top are the dates.... the colours below represent the cloud cover and things like that ... the instructions below are pretty clear ...

Post by **weixing** » Sat Feb 11, 2006 8:02 pm

Hi,
Look at the weather forecast on 12 Feb 2006 20:00... cloud cover is state as clear (no cloud), but transparency forecast is very poor... hmm... ??? Just wondering what does this mean??

Have a nice day.

klutz · Post by **klutz** » Sat Feb 11, 2006 8:15 pm

Those are the times - 2am, 5am, 8am, 11am, 1400hrs(2pm) etc the bigger white numbers on top are the dates.... the colours below represent the cloud cover and things like that ... the instructions below are pretty clear ...

Okay, now I understood... previously I thought they were numbers as such "1 1 1 2 2 2 5 8 1 4 etc.." (two lines). Din't realise I have to read the top & bottom combined to form the hours.

Thanks!

jermng · Post by **jermng** » Sat Feb 11, 2006 8:21 pm

WX, from what I understand, cloud cover is of course the amount of clouds ... transparency is the "seeing" - like air turbulence, amount of air pollution overhead ( I have NO idea how they predict that) and stuff like that.

Don't ask me the science behind those ...