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Green Line Separater

WSR-88D Base Reflectivity Image of a Squall Line and Embedded Bow Echo (Close-up View) Base reflectivity data is one of the basic products available on the WSR-88D. Reflectivity shows where and how hard it is raining or snowing, as well as precipitation intensity trends and movement. Blue and green colors represent light-to-moderate rainfall. Yellow and orange colors show moderate-to-heavy precipitation, while red is very heavy rainfall and possibly hail. At left is a close-in view of a portion of a squall line over parts of south-central Indiana and northwest Kentucky. Forecasters identify reflectivity signatures to determine potential storm severity. In this case, a bow echo within the line was located across Daviess County, which was producing a damaging tornado at this time in Owensboro on January 3, 2000.  A weak echo channel (axis of lower reflectivity values) was located across southwestern Daviess County just behind the bow apex, indicative of strong straight-line winds as well. Also note the tight reflectivity gradient on the leading edge of the line, a signature typically associated with severe storms.  Other strong storms were located farther north and south along the line.

Green Line Separater

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