Bulletin of the American Meteorological Society, Volúmenes21-22

air mass American amount appears atmosphere average base BULLETIN cause chart climate cloud coast cold continued cover curve cyclone determined developed direction discussion east effect factors fall feet FIGURE flow forecasting formation front give given gradient greater ground heat height humidity important increase indicated intensity interest July June layer less light lower March maximum mean measured meeting meteorological method miles months moving nearly normal noted observations obtained occur Office period possible precipitation present pressure probably radiation radio rain rainfall range records region relative reports season shown snow Society solar station storm surface Table temperature tion United University upper usually values variation warm Washington wave Weather Bureau wind winter