WANTED - Modern weather 'saw' - Page 2 - Midlands Weather Forum

brett · #11 (**Link to Post**) 23-May-2008, 04:05

Quote:

Originally Posted by beteljuice

No problem - That's great

You have w Autumn (leaves) AND x heavy rain

But I am only trying to make sense of 'Acts Of God' - councils are beyond any kind of reasoning

yea - good point - i would stick with the acts of god - far easier to predict - and more logical in a lot of cases

scotweather · #12 (**Link to Post**) 18-Jun-2008, 20:32

Quote:

Sort of things wanted:
How much rain to cause local flooding ?
If it's winter AND low (but not freezing ?) temp AND forecast is rain - is that sleet ?
If its May AND evening AND temp <5 AND forecast clear - is that a frost warning for gardeners ?
If Summer AND wind from (direction) AND temp certain value - rain ?
and so on ....

ok
Here in Falkirk these results indicate the following:

Flooding potential I've already stated!

Winter and low: 0C-2C with forecast of rain would result in sleet but also the elevation of the location has to be taken into consideration. SWeather sits at 660' so therefore snow or sleet is more likely than at sea level.

May and Cool evening temp - Chance of frost ... also wind speed needed as frost more likely when calm also elevation has to be taken into consideration also. Sea Level may or may not be colder than 660' here at SWeather.

Forecast : for Falkirk...... Wind N, NE, E and occassionally SE..... cooler weather expected but mostly dry. Wind W, SW... chance of rain but warmer. EXCEPT (FALKIRK ONLY)..... Winter where N,NW,W,SW, S..... Falkirk unlikely to see snow event however if wind is NE,E or SE major snow event possible.

Outlook FAIR, Temp<2, humidity>60% (guess) would this equal Freezing Fog likely ?

This is what I can think of at moment!

Cheers
K

beteljuice · #13 (**Link to Post**) 18-Jun-2008, 22:26

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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The Following User Says Thank You to brett For This Useful Post:
scotweather (23-May-2008)

The Following User Says Thank You to scotweather For This Useful Post:
beteljuice (18-Jun-2008)