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 Post subject: Red sky at night ..
PostPosted: Wed Jul 19, 2017 12:46 pm 
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Joined: Mon Jan 09, 2006 11:05 am
Posts: 4950
Location: Lancashire
.. shepherd's delight? The Met. Office says it's about right, and so does 83 per cent of the public.
According to the science behind the folklore: "high pressure traps dust and dirt in the atmosphere, which scatters blue light, leaving the red remaining- hence the reddish appearance of the sky."
What about "It's too cold to snow"? Some 62 per cent of the public believes this, but its incorrect. According to the Met. Office, "The colder the air gets, there's less water vapour, reducing the likelihood of snow."
Then there's, "Cows lie down when it begins to rain". Six out of ten of us believe this, but it's wrong. "There is no scientific backing for this at all. Cows lie down for a number of reasons," said the Met.
What about "An open pine cone is a sign of good weather"? Yes. It confirms what 55 per cent of people believe. In damp weather, cones are more flexible and close as a consequence.
Finally, "Rain before seven, fine by eleven". A third of people believe this and its frequently correct. The Met. Office says, "On many occasions, four hours will allow enough time for the rain to pass."
The Met. says that 58 per cent of the public believes that weather proverbs are accurate predictions. Two-thirds of them think that they give more reliable forecasts of the weather than the official weather forecasts.
Are there other weather proverbs we've left out?

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Last edited by brian livesey on Mon Aug 07, 2017 9:52 am, edited 1 time in total.

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 Post subject: Re: Red sky at night ..
PostPosted: Thu Jul 20, 2017 4:17 pm 
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Location: Lancashire
Yes, it's Saint Swithin's! The Met. seems to have overlooked that very obvious one. The saying goes that if it rains on St. Swithin's day, it will rain for another forty days.
A persistent rain pattern does seem to occur at that time, but not necessarily for a period of forty days.

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 Post subject: Re: Red sky at night ..
PostPosted: Mon Aug 07, 2017 7:11 am 
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Joined: Sun Apr 27, 2008 2:59 pm
Posts: 205
Location: Cambs
Quote:
According to the science behind the folklore: "high pressure traps dust and dirt in the atmosphere, which scatters blue light, leaving the red remaining- hence the reddish appearance of the sky," research by meteorologists has revealed.

I always thought that the reason was bit simpler, although the scattering is the reason for red.

Our weather is highly westerly and as it comes in bands wet, dry, wet , dry (the wet may be a LONNNNNNg wet but it is still in bands).

So when looking West if the incoming band is rain we do not get the scattering and so no red.
If the incoming band is dry (clear) then we see out to our West a red sky.
Meaning that this western clear sky is usually heading our direction.


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