WEATHER INDICATIONS.

Waikato Times, Volume XXIV, Issue 1978, 12 March 1885, Page 4

WEATHER INDICATIONS.

In answer to an eiNjuuj fiom tin's office, Captur Kdvvm lias fjxoiiicd us with tl>e follow ing lnlcic-tinij communication: — Enclosed yon will leccne a buef desuip lion of tli«- buometcr movement" in this eountiy. mul of the winds which follow them. I would ha\e sent tins to yon tailier, luit tlio snb|ect is ono which t C(juire3 a gieat deil of caie . being difficult to deal with on account of its being so coutiadictory ; and tlm is the greatest leason why many people find it s.o haul to make out what changes of weathci aic approaching You will see hy the en closed paper that the glass falls in 1, foi a change of wind from right to left, and you will also see that in i, it does e\actl\ the same foi u change of wind in the opposite direction ; and iv fact it seems that if I ha I stated plainly that the baiometer falls when it likes, and uses w hen it pleases it would amount to just the same thing ; but this is by no means the ca.*e, for the baiometer never gi\es wrong information, and if our conelusioii3 aie not coueet it is because we have not rightly judged ita indications. The w.iy the wind changes is one of the most important points of observation, and if this has been carefully noted the movements of the barometer will seldom seem contiaditory. One of the reasons of its seeming irregularity is that our weather depends not upon what happens immediately around us, but upon what is going on a long distance off For instance, a fall of half an inch in the southern part of the country may affect our instruments Iteie only a little, and yet «\e shall have a strong noitheily gale, although our baiometer seems to have given \ery little leason to suppose any such e\ent likely. But if we ha\e caiefully watched the w.iy the wind has changed, and have also noticed the movements of birds or any kind of stock, the close appearance of objects not geneially well defined, or not usually visible, such as a mountain peak, a church spire, 01 tiees on a lidge ; the appeal ancc of features on the ranges w Inch are not gener ally seen ; the moie than usual bulliancy and numbei of stars \ lsihle and the unsteadiness or otheiwise of then light; the slim pneis with which distant sounds can be distinguished, etc ; wi bha.ll at all events have been prepaied for a change, and m,iy even learn to make some estimate of its amount, for the more unusual the phenomena observed the more decided will be the coming weather. The clouds are also full of information and instruction to those who will observe them, and the kind of cloud which accompanies the changes in the rem-iiks under headings ]. 2 and 3, arc different horn those which accompany 3 and 4. We not unfrequently see thice distinct strata of clouds, and sometimes tlieio are foui ; in this ease the nppeimost ones are at a great altitude, and such appeal ances geneially show that the appioaclung change will last longer than uMial. Solar and Lunar lialos aie well know n signs of a change of w eather, usually with rain, and the more pei feet the halo the more decided will the change be The above are a few of the matters which can be leadily noted by those who desire to undei stand the baiometer indications ; but nothing is too small to be unworthy of observation, especially if any register be Kept, and the more carefully the remaiks aie made the closer will the observer find that experience will enable him to detect a coming change of weather. The subject is one which includes so much of interest that it is difficult to know when to leave off, but I have endeavoured to be as concise as possible. ]

TALLING, For wind changing from East towards North, then to N W., and as far as West, usually with rain, and wanner, unless the biuometer has been above 30"20 at sea level, in which case the wind will be very diy and cold until the baiometer is below 30 00 at bca level. -On the Western Coast from "Key Plymouth southwards, and also on the Knstein Coast of the Middle Island the barometer sometimes will continue falling with the wind between West and .South- West, and is invariably the sign of exceptionally severe gales. 2

HIM KG, For wind cliangiug from West to South-east, SW , round by South to S.K. and East, usually with rain and cold ; but the weather generally clears after a few hours, unless the barometer has been 2950 or lower at sea level.

3 lUSINQ, With wind changing from West to South, or S.S.K., then hacking to S.W., round westward to N.W. and North, or as far as N. E., quickly shews barometer will fall ntjain soon, and unsettled weather, with high wind, and geneially lain. 4 FAI.UVU, With wind backing from North to N. K , loiind eastward to Fouth, nearly always with heavy rain.— On the East Coast from the East Cape south wauls the haiometer sometimes continues fall ing with the wind, changing ftom South to S.S. W ; tins is only the case with gales of exceptional seveiity. 5 RI.SIXC, With wind backing from South to S.W., round westward to N.W., tins change is unusual, but when it occuis it follows 4. To correct barometer leadings for height about sea level, add the one hundredth part of an inch tor every ten feet of altitude : Reading obseived 29 GO Height abovo sea, 700 feet ... "7o Reading corrected to sea level 30.35 This is sufficiently correct for all ordinary purposes. For settled weather, the change of wind should be completed as desctihed in 1 and 2 ; and the barometer continue to rise Blowly to 30.20 at sea level or up words ; should it rise fast it shews but a Bhort duration of fine weather. Commencing with high barometer or not less than 30.20 at sea level the change of weather in New Zealand is usually that described in 1, followed by that described in 3, and terminating by that shown in 2. There can, however be no definite period fixed for the duration of the interval between 3 and 2, but some sometimes it will continue for six weeks, and is generally much less. In estimating weather changes local peculiarities must be carefully studied, as mountain ranges cause veiy great deflections of the surface winds and at in land places it will sometimes be found that the remarks under Falling (1) may occnr with winds from the southern points of the compass ; this being due to locality only, and not being an indication of the exceptional weather mentioned under headings 1 and 4 ; such ca<?es, however, only occur when the obsen cr is situated amongst or close to veiy broken country, and in some such situations the barometer will be found to fall or rise fully half an inch and yet the wind remain inndoiate though the sky will indicate that there is very rough weather in the vicinity. — Waiianpa Star.

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