. Compendium of meteorology. Meteorology. RADAR STORM OBSERVATION 1275 features in this type of precipitation except that, on occasion, it can be fairly uniform. Because of this factor, this type of precipitation might be useful for relating storm echo signals to precipitation intensity. C. Hurricanes and Typhoons. Radar detection of hur- ricanes and typhoons is even more dramatic than radar detection of cold-front squall lines [66]. The rain-distri- bution pattern as seen on a PPI scope is illustrated in Fig. 12. It is startling in its similarity to the symbol §. Fig. 12.âHurricane of 18-21
. Compendium of meteorology. Meteorology. RADAR STORM OBSERVATION 1275 features in this type of precipitation except that, on occasion, it can be fairly uniform. Because of this factor, this type of precipitation might be useful for relating storm echo signals to precipitation intensity. C. Hurricanes and Typhoons. Radar detection of hur- ricanes and typhoons is even more dramatic than radar detection of cold-front squall lines [66]. The rain-distri- bution pattern as seen on a PPI scope is illustrated in Fig. 12. It is startling in its similarity to the symbol §. Fig. 12.âHurricane of 18-21 Sept., 1948. PPI-scope photo- graph made just prior to passage of the eve over the radar at Key West, Florida. (0900 EST, 9/21/48, range about 125 ;) (flfficial U. S. Navy Photo.) which has been chosen to indicate the position of hur- ricane centers on weather maps. The spiral rain bands visible in Fig. 12 have been observed in all hurricanes and typhoons detected by radar. These bands move slowly around the center; the cells in the bands move along the bands and into the center in a counterclockwise direction (in the North- ern Hemisphere) [37]. As yet, no relationships between the band movement and winds aloft have been estab- lished, because of the difficulty of obtaining winds-aloft observations during storms of this type. It is possible that radar will also provide the solution to this problem. From Fig. 12, it will be noted that a very definite position can be found for the center of rotation as far as the rain is concerned. There is evidence that this center detected by radar does not always coincide with the center of low pressure. Also, a clear "eye" may or may not be pi'esent, depending upon the intensity of precipitation at this point. Radar hurricane detection is probably of greatest value in connection with aircraft hurricane reconnais- sance. Early detection of the storm, while it is still far from land and out of range of land-based radars
Size: 1589px × 1572px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectmeteorology
