#1  
Old 08-12-2017, 07:55 PM
HarryD (Greg)
Registered User

HarryD is offline
 
Join Date: Dec 2008
Location: Sydney
Posts: 116
Cloud Free Night

Hi

I would like your thoughts on a first world problem.

I am always a bit confused when checking Cloud Free Night for Sydney.

For example this coming Saturday has GFS showing no cloud, while Access shows some cloud. On Sunday GFS has cloud declining while Access has cloud increasing on the D1-3 page.
Tuesday has no cloud for GFS and increasing cloud for Access on the D3-5 day and the other previous days change somewhat.

Which is the best one to choose, GFS or Access. I know Access is based on our BMO and I am also aware that weather forecasting is still not an exact science but I would appreciate your thoughts/experience.

I know this is software/computers but clouds and astrophotography seem to go hand in hand.

Cheers

Harry
Reply With Quote
  #2  
Old 08-12-2017, 08:53 PM
cfn's Avatar
cfn
Cloud Free Night Team

cfn is offline
 
Join Date: May 2016
Location: Melbourne
Posts: 210
Quote:
Originally Posted by HarryD View Post
Hi

I would like your thoughts on a first world problem.

I am always a bit confused when checking Cloud Free Night for Sydney.

For example this coming Saturday has GFS showing no cloud, while Access shows some cloud. On Sunday GFS has cloud declining while Access has cloud increasing on the D1-3 page.
Tuesday has no cloud for GFS and increasing cloud for Access on the D3-5 day and the other previous days change somewhat.

Which is the best one to choose, GFS or Access. I know Access is based on our BMO and I am also aware that weather forecasting is still not an exact science but I would appreciate your thoughts/experience.

I know this is software/computers but clouds and astrophotography seem to go hand in hand.

Cheers

Harry
Hi Harry, the short answer would be that ACCESS gets it right more often than GFS in coastal areas. If both models diverge significantly then the certainty of the forecast is less than if they both converge to the same result. It's good to have a look at the total cloud meteogram where both models are plotted on the same graph.

You can have a look at this file for a side by side view of the two models.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 03:05 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
OzScopes Authorised Dealer
Advertisement
SkyWatcher Australia
Advertisement
Meade Australia
Advertisement
Celestron Australia
Advertisement
NexDome Observatories
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
Astronomy and Electronics Centre
Advertisement