Page:Weather Facts and Predictions.djvu/46

 day will be fine. But should the predominating colour be pale yellow extending high towards the zenith, there will be a change of weather.

If the twilight is unusually protracted, though the atmosphere seems very clear the higher regions are charged with moisture which will soon be precipitated in the form of rain.

If a cloudy day clears up at night, rain may follow. [The clouds are dissipated by sinking into a warm lower stratum of air, but the moisture remains, and it is only a question of time when it is precipitated.]

If the Moon is pale and the cusps blunt, rain is indicated; but fine weather if it is clear and its outline sharp.

When the Moon is near its full (on either side), as it rises in the heavens, clouds frequently break up and eventually disperse as night wears on.

A “young Moon with the old Moon in its arms” is a sign of rain, being equivalent in physical effect to the clearness of distant hills, which clearness always betokens impending rain.

If the stars are clear and twinkle brightly, fine weather in summer and frost in winter are indicated.

If the stars are dull and large, and are devoid of rays (twinkling imperceptible), rain may be expected soon.