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Old 04-15-2016, 06:32 PM
 
Location: Sector 001
15,946 posts, read 12,295,551 times
Reputation: 16109

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I never liked how they classify their rain percentages. Today we had a 30% chance but virtually everyone got a little something, albeit it was very scattered.

Other days there's a 60% chance and we get nothing. Usually I take their percentage chances and cut them by a third to a half to calculate the real chance most of the time, with the exception of a 100% chance.. they usually nail that one down most of the time.

They've gotten better though.... I find the GFS model is the most accurate with snowfall, though I don't have access to all the weather models.

 
Old 04-15-2016, 06:56 PM
 
17,842 posts, read 14,391,265 times
Reputation: 4113
Quote:
Originally Posted by Speleothem View Post
Same principle; the computer models are always wrong.
Dr Gavin Schmidt:"Models are not right or wrong; they're always wrong. They're always approximations. The question you have to ask is whether a model tells you more information than you would have had otherwise. If it does, it's skillful"

The emergent patterns of climate change - Gavin Schmidt - TED talks May 2014.

https://www.ted.com/talks/gavin_schm...ge?language=en
 
Old 04-15-2016, 07:11 PM
 
Location: Texas
38,859 posts, read 25,554,711 times
Reputation: 24780
Quote:
Originally Posted by chronic65 View Post
For a week or more they have been predicting increasing percentages of rain. Yesterday it was 100% for Saturday night and Sunday. "The computer models all agree" Lots of rain, rain and more rain. I just now looked at the forecast. Percentages down, amounts of rain significantly down. This goes on day after day after day. They never know. Most of the rain we gets comes rather unexpectedly. They are idiots and I am an idiot for putting in credence in their "forecast".

Well, the point I want to make is these are the same people that are so dang certain the mankind is causing global warming or cooling or oceans rising or drought or you name it.

They don't know squat!
Go to college and get a degree in meteorology. Show 'em how it's done. Get the National Weather Service straightened out. America is depending on you to come through for us all.

 
Old 04-15-2016, 07:30 PM
 
46,966 posts, read 26,011,859 times
Reputation: 29455
Quote:
Originally Posted by Frank DeForrest View Post
Well it's not a good idea to rely on the govt for the weather report...or anything else for that matter.
Curious - what is your superior private source of weather forecasts?
 
Old 04-15-2016, 07:33 PM
 
17,842 posts, read 14,391,265 times
Reputation: 4113
Quote:
Originally Posted by Dane_in_LA View Post
Curious - what is your superior private source of weather forecasts?
Chicken entrails?
Asking his deity?
 
Old 04-15-2016, 07:34 PM
 
45,235 posts, read 26,464,208 times
Reputation: 24995
Quote:
Originally Posted by Dane_in_LA View Post
Curious - what is your superior private source of weather forecasts?
I look out the window.
 
Old 04-15-2016, 08:12 PM
 
Location: Palo Alto
12,149 posts, read 8,422,794 times
Reputation: 4190
Quote:
Originally Posted by Ceist View Post
Weird. Where did you get the idea that natural variability is not included in any of the major long-term models?


http://www.climatechange2013.org/ima...er09_FINAL.pdf

We have gone over this before.

http://www.city-data.com/forum/42849589-post166.html
 
Old 04-15-2016, 08:48 PM
 
Location: Free From The Oppressive State
30,267 posts, read 23,751,941 times
Reputation: 38678
Quote:
Originally Posted by Retroit View Post
How accurate would a sportscaster be if he/she had to predict who was going to win in the next few days? How accurate would the newsanchor be if they had to predict how many people would get shot or what liquor store would get robbed?
What an uneducated comment. The two are not anywhere even close to how weather is predicted, (which, by the way, they can only be accurate in a 3 hour window). Did you not pay attention in ANY science class?
 
Old 04-15-2016, 09:11 PM
 
17,842 posts, read 14,391,265 times
Reputation: 4113
Quote:
Originally Posted by TrapperJohn View Post
And you were wrong then too. Information about the climate models is not difficult to find. I provided you with a link to the IPCC AR5 chapter on climate models which shows your claim that "models don't include natural variability" is wrong.

Last edited by Ceist; 04-15-2016 at 09:23 PM..
 
Old 04-16-2016, 11:38 AM
 
Location: Palo Alto
12,149 posts, read 8,422,794 times
Reputation: 4190
Quote:
Originally Posted by Ceist View Post
And you were wrong then too. Information about the climate models is not difficult to find. I provided you with a link to the IPCC AR5 chapter on climate models which shows your claim that "models don't include natural variability" is wrong.

Nevertheless, even if there is such decrease in the solar activity, there is a high confidence that the TSI RF variations will be much smaller in magnitude than the projected increased forcing due to GHG. – IPCC AR5 Chapter 8


Section 8.4.1 of the IPCC AR5 Report provides 2 pages of discussion on observations of solar irradiance. But they conclude that all this doesn’t matter for the climate. I agree that the TSI RF variations are much less than projected increased forcing due to the GHG. But the solar-climate connection is probably a lot more complex than this statement implies.

Climate Etc. has had 6 previous posts on the sun-climate connection [link]
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