. Baltimore county. Geology; Mines and mineral resources; Physical geography; Forests and forestry. 376 Climate of Baltimore County it is in Maryland, or limited to the summer months as in the tropics or to the winter months as in the states along the Pacific coast. Similar variations occur in the rainfall during the day. During the winter and spring months the precipitation is fairly uniform throughout the day while the showers and thunderstorms of the summer are most abundant in the hours of the late afternoon or in the early evening. The average hourly frequency of precipitation at Baltimor
. Baltimore county. Geology; Mines and mineral resources; Physical geography; Forests and forestry. 376 Climate of Baltimore County it is in Maryland, or limited to the summer months as in the tropics or to the winter months as in the states along the Pacific coast. Similar variations occur in the rainfall during the day. During the winter and spring months the precipitation is fairly uniform throughout the day while the showers and thunderstorms of the summer are most abundant in the hours of the late afternoon or in the early evening. The average hourly frequency of precipitation at Baltimore from January 1893 to the close of December 1902 is shown graphically in figure 20. The MOT 12J456789 10 11 Nop* 1 2 3 4 S 6 ' 8 9 10 II MPT. Fig. 20.—Average Hourly Frequency of Precipitation. The heavy shades show the time of most frequent occurrence of precipitation during the day for ever3- month of the year. The small figures attached to the irregular curved lines show the average number of times precipitation was recorded per month at the times indicated. (After Fassig.) duration of precipitation also varies according to the seasons. The average rain period is a little less than eight hours in Baltimore. During the winter, spring, and fall when the storms are due to well defined cyclonic depressions, they last from 9 to more than 13 hours, but in the summer the thunderstorms and summer showers seldom last over two hours. The period of actual precipitation is not the same as that of the storm which causes it. Usually there are a series of showers sepa- rated by intervals of a few minutes or hours with little or no precipita- tion. This is less characteristic of a "northeast storm" where the rainfall is more persistent but even here there is a marked variation in the intensity of the rainfall. The Baltimore records indicate that there are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectf, booksubjectgeology
