18-Jun-2008, 22:26
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Hurricane | | Join Date: Feb 2006 Location: Dudley, West Midlands, UK
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| Re: WANTED - Modern weather 'saw'
How does that compare with The Project Gutenberg eBook of Barometer and Weather Guide, by Robert Fitzroy
Extract Quote:
If the barometer has been about its ordinary height, say near thirty inches, at the sea level, and is steady, or rising—while the thermometer falls, and dampness becomes less—North-westerly, Northerly, or North-easterly wind—or less wind—may be expected.
On the contrary—if a fall takes place, with a rising thermometer and increased dampness, wind and rain may be expected from the South-eastward, Southward, or South-westward.
A fall, with a low thermometer, foretells snow.
Exceptions to these rules occur when a North-easterly wind, with wet (rain or snow) is impending, before which the barometer often rises (on account of the direction of the coming wind alone), and deceives persons who, from that sign only, expect fair weather.
When the barometer is rather below its ordinary height, say, below twenty-nine inches and nine-tenths (at the sea level only), a rise foretells less wind, or a change in its direction towards the Northward,—or less wet; but when the mercury has been low, say near 29 inches—the first rising usually precedes, and foretells, strong wind—(at times heavy squalls)—from the North-westward—Northward—or North-eastward—after which violence a rising glass foretells improving weather—if the thermometer falls. But, if the warmth continue, probably the wind will back (shift against the sun's course), and more Southerly, or South-westerly wind will follow.
"Backing" is a bad sign, with any wind.
The most dangerous shifts of wind, and the heaviest Northerly gales happen after the mercury first rises from a very low point.
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