Tropical Depression Five's (TD5) remnants remain over the lower Mississippi valley today and are slowly drifting northeast. Yesterday, NASA satellite imagery observed the bulk of TD5's precipitation just south of Louisiana, over the Gulf of Mexico. Today, August 18, that precipitation has moved north and is drenching east-central Louisiana and western Mississippi.
The Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite captured an infrared view of TD5's remnant clouds and showers over Louisiana and the north central Gulf of Mexico on August 18 at 08:23 UTC (4:23 a.m. EDT), and didn't show any extremely high, very cold thunderstorm cloud tops during the early morning hours, which correlates with lighter precipitation during night-time periods. During the daytime when the heat of the sun powers convection (rapidly rising air that condenses and forms clouds and thunderstorms), cloud tops would likely be higher and colder (and thunderstorms more potent) on AIRS infrared imagery.
A flash flood watch was issued for today and this evening for much of central Mississippi and northeastern Louisiana due to the risk for very heavy rainfall associated with the remnants of tropical depression five. Two to three inches of rainfall and locally higher amounts of greater than five inches will be possible. Live National Weather Service radar from Brandon/Jackson, Mississippi: http://radar.weather.gov/radar.php?rid=DGX&product=NCR&overlay=11101111&loop=yes
Louisiana, Mississippi and Arkansas can expect a slow and continued soaking as TD5's remnants continue to creep northeast.
Rob Gutro | EurekAlert!
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