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August 2001 Floods
The remnants of Tropical Storm Barry moved across parts of Central and
North Alabama on August 5th through the 6th. Although it did not produce
very heavy rainfall across the area, Barry left a tropical air mass across
the region in its wake. Showers and thunderstorms, over the next several
days, produced locally heavy rainfall across parts of North and Central
Alabama. The most noteable rainfall occurred on the morning of August 10th
across parts of Madison, Marshall and Morgan counties in North Alabama.
Showers and thunderstorms developed around 3:00 am on the morning of August 10th
across parts of south Madison County. The rain continued to develop and spread
across parts of Marshall County and the east section of Morgan County.
A radar animation from the Hytop radar shows showers and thunderstorms moving
over parts of Madison County, then becoming more enhanced and widespread
after 3:00 am. Although the rain was moving southeast, redevelopment was
occurring over the same sections of these counties. This persistent heavy rainfall
produced flooding of many roads and bridges. The runoff from the heavy rainfall
caused soil erosion that downed trees and caused local creeks and streams to rise out of
their banks.
Radar rainfall estimates from the WSR-88D located at Shelby County Airport near
Alabaster, Alabama (KBMX, shown above) showed mostly 3 to 5 inches across the area,
with spots of 6 to 8 inches. Local observerations of rainfall amounts across this area
ranged from 2 to 8 inches of rainfall. Areas such as New Hope, Owens Crossroads, Lacey Springs,
Arab and Union Grove were the most impacted with rainfall amounts ranging from 4 to 8 inches.
A table with rainfall amounts from Cooperative Observers, TVA/USGS automated gages, the
Cooperative Huntsville Area Rainfall Measurements or CHARM, and a graphic showing the CHARM
network can be viewed HERE.
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