Rapid movement of upper clouds, with little or no wind at surface. Falling barometer for several days in advance of storm, with rising temperature. Southerly winds precede rain, with cirro-stratus clouds moving from the westward.
New York, N. Y.
Rain storms, preceded by falling barometer, rising temperature, increasing humidity, cirrus clouds in upper with stratus in lower atmosphere, spreading gradually over the whole sky from the eastward.
Wind storms from an easterly direction, preceded by rapidly falling barometer, with frequent oscillations, rising temperature, increasing humidity moving rapidly at a great height.
Westerly storms, by rapidly rising barometer, free from oscillations, falling temperature, increasing humidity, changeable winds, with cirrus clouds in upper and stratus in lower atmosphere.
Norfolk, Va.
High and rapidly falling barometer, rising temperature, low humidity, unusually clear atmosphere, with southeast and east winds.
North Platte, Nebr.
Low followed by rising barometer, cumulus and cumulo-stratus clouds moving rapidly from northwest and west.
All storms approach from the northwest without reference to direction in which wind may blow previously.