Data from NASA’s Soil Moisture Active Passive (SMAP) satellite have been used to create new surface flooding maps of Southeast Texas and the Tennessee Valley following Hurricane Harvey. The SMAP observations detect the proportional cover of surface water within the satellite sensor’s field of view. This sequence of images shows changes in the extent of surface flooding from successive five-day SMAP observation composite images.
Widespread flooding can be seen in the Houston metropolitan area on Aug. 27 following record rainfall from the Category 4 hurricane, which made landfall on Aug. 25th, 2017. Flood waters around Houston had substantially receded by Aug. 31, while flooding had increased across Louisiana, eastern Arkansas, and western Tennessee as then Tropical Storm Harvey passed over the area.
The image below shows the change in flooded area between Aug. 27 and Aug. 31, with regions showing the most flooding recession depicted in yellow and orange shades and those where flooding had increased depicted in blue shades. The SMAP satellite has a low-frequency (L-band) microwave radiometer with enhanced capabilities for detecting surface water changes in nearly all weather conditions and under low-to-moderate vegetation cover. SMAP provides global coverage with one-to-three-day repeat sampling that is well suited for global monitoring of inland surface water cover dynamics.
SMAP is managed for NASA’s Science Mission Directorate by NASA’s Jet Propulsion Laboratory in Pasadena, California, and NASA’s Goddard Space Flight Center in Greenbelt, Maryland. JPL is managed for NASA by Caltech. A consortium of researchers from other universities participate on the SMAP mission science team, including the Massachusetts Institute of Technology, Princeton University and the University of Montana, which provided the SMAP surface water imagery.
Who wants a winter weather alert? Everybody out West gets an alert! Snow breaking out across for the next few days!… https://t.co/bSqrbz2xm82 hours ago by WeatherNation
A MARGINAL RISK of severe weather can be expected across area of western Texas through the day. This is for mainly… https://t.co/mS0WJLdJXs4 hours ago by WeatherNation
Jackson, WY looked like a Christmas card Sunday morning after several inches of fresh snow fell overnight. Snow cha… https://t.co/Al6NPyAEs84 hours ago by WeatherNation
Pretty cool radar loop from the Pacific Northwest. Rain and snow associated with a powerful low that is spinning on… https://t.co/32R31xmRY66 hours ago by WeatherNation
Flooding across places like Kentucky led to scenes like this. We have a break in the rain today but flooding concer… https://t.co/z3GX38RKnk8 hours ago by WeatherNation
Fresh snow fell in portions of the Northeast overnight! With a big warm up in store...snow will be a distant memory… https://t.co/kQTAeAngSB9 hours ago by WeatherNation
COASTAL FLOODING THREAT - Beaches along the Puget Sound in Washington could have minor flooding Sunday morning...he… https://t.co/yKfIgHbl1o15 hours ago by WeatherNation
NORTHEAST SNOW - Fluffy snow coming down hard in the Big Apple! Some snow totals as of 9PM EST up to 6"+ already in… https://t.co/FbzgHovjLd17 hours ago by WeatherNation
BIRDS-EYE VIEW - Check out this aerial footage of the snow in Pennsylvania, captured on a drone Saturday evening!… https://t.co/PoSlKzwBr118 hours ago by WeatherNation
WIND AND WAVES - Windy and wet weather continues through the end of the weekend for the Pacific Northwest. Coastal… https://t.co/xnWmwflnWz19 hours ago by WeatherNation
FLOODING DOWNTOWN - This was the scene earlier today in Pittsburgh, PA due to heavy rain and the rising of river le… https://t.co/bBw0GIqE3n20 hours ago by WeatherNation