. Annual report ... of the Board of Agriculture for the year ending June 30th ... stratus, preceded by a halo-bearing sky, makes its appearance,which gradually becomes lower and denser, and forms an overcast,dirty sky. In the whole front of the depression the temperature rises,and the atmosphere feels muggy and close. In the right hand frontthe clouds assume the cumulo-stratus type, with driving rain later the left-hand front the air is cooler, but still oppressive, with aneasterly wind and overcast sky, succeeded by drizzling rain or ill-defined showers. When the trough of depression ha
. Annual report ... of the Board of Agriculture for the year ending June 30th ... stratus, preceded by a halo-bearing sky, makes its appearance,which gradually becomes lower and denser, and forms an overcast,dirty sky. In the whole front of the depression the temperature rises,and the atmosphere feels muggy and close. In the right hand frontthe clouds assume the cumulo-stratus type, with driving rain later the left-hand front the air is cooler, but still oppressive, with aneasterly wind and overcast sky, succeeded by drizzling rain or ill-defined showers. When the trough of depression has passed, thebarometer begins to rise, the wind changes and becomes squally, withshowers of rain ; the air grows cooler, and the clouds break and ulti-mately clear away. Now, with regard to the prognostics with reference to Plate xix,where the characteristic weather in the different portions of a depres-sion are given in a diagrammatic form, it will be seen that the firstindication of a coming change is the appearance of a halo round thesun or moon in the cirro-stratus Detached CumulusBlue SKy Windy Cirrus MaresTails Plate XIX. HENCE HALO INDICATIONS. When round the moon there is a brugh,The weather will be cold and moon with a circle brings water in her beak. Halos predict a storm (rain and wind or snow and wind) at no great dis-tance, and the open side of the halo tells the quarter from which it may beexpected. Mock suns predict a more or less 3ertain change of weather. WEATHER PROBABILITIES. 385 With regard to the open side of the halo indicating the quarterfrom which the storm may be expected, it does not appear that thiscan be much used as a prognostic. It, however, most probably origi-nated in the fact that halos are often seen in the south-west or west,when the sun or moon is rather low, the lower portion of the halo be-ing cut off by clouds banking up in that direction, and that ourstorms generally come from those quarters. Yet by others it is sup-pos
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectagriculture, bookyear
