1. A distant roar (probably of the hurricane itself) as of wind
rushing through a hollow vault.
2. A peculiar moaning of the wind, indicative of the close
proximity of the violent portion of the hurricane.
THE METEOROLOGICAL PHENOMENA ACCOMPANYING A REVOLVING STORM
MAY ALSO BE ENUMERATED THUS:
1. A very rapid motion of the air constituting the hurricane, and
increasing in velocity as the center is approached.
2. A fitful variation of intensity in the force of the wind, which
sometimes blows with fearful violence, carrying away everything
that opposes its progress; then sinking to a gentle breeze, or
even lulling to a calm, but almost immediately afterwards
springing up with greater violence than before. The hurricane
winds are nearly if not entirely, without exception, puffy,
violent, and blowing in gusts.
3. An immense condensation of aqueous vapor, forming large banks
of cloud, which precipitate torrents of rain. The condensation
appears to be so exceedingly rapid that large quantities of
electricity are generally developed, giving rise to incessant
flashes of lightning.
4. A general darkness, and gloominess within the area of the cyclone,
relieved only by the fitful glare of the lightning, or the
appearance of the imperfect circle of light near the center or
axis of the storm.
5. A separation of the clouds in or near the center of the hurricane,
so as to produce in the immediate neighborhood of the axis a clear
sky, through which the sun and stars are often seen with great
brilliancy.