![]() Color generally correlates with the amount and type of sediment: lighter green and tan areas have more suspended silt and sand than dark blue waters. This image was acquired on August 31, 2011, when Landsat 5 viewed the coast from the Carolinas to New York. In this true-color satellite image, pale green and tan water flows past Manhattan and mixes with the darker waters of New York Harbor and the Atlantic Ocean. New York’s Hudson River and estuary was no exception. In the wake of Hurricane Irene’s heavy rains, sediment filled many rivers and bays along the U.S. Credit: USGS/NASA Earth Observatory/Robert Simmon Brown waters likely indicate more mud or leaf tannins from inland runoff the Passaic River in New Jersey is an example. Lighter green and tan areas have more suspended silt and sand than dark blue waters. 31, 2011, pale green and tan water flows past Manhattan and mixes with the darker waters of New York Harbor and the Atlantic Ocean. In this true-color satellite image from the Landsat 5 satellite on Aug. By using non-tropical warnings in these areas from the start, we avoid or minimize the significant confusion that could occur if the warning suite changed from tropical to non-tropical in the middle of the event.Landsat 5 Satellite Sees Irene-Generated Sediment in New York Harbor The NWS plans to continue using non-tropical watches and warnings issued by local offices in the Mid-Atlantic States and northward throughout this event. Because Sandy is expected to make this transition before reaching the coast, the NWS has been using non-tropical wind watches and warnings, issued by local NWS Weather Forecast Offices (WFO's), to communicate the wind threat posed by Sandy in the Mid-Atlantic States and New England (this is why NHC's tropical storm warnings extend only into North Carolina). Regardless of when this transition occurs, Sandy is expected to bring significant wind, surge, rainfall and inland flooding hazards over an extremely large area, and snowfall to more limited areas. Some aspects of this transition are already occurring, and NWS forecasts of storm impacts are based on this expected evolution. ".thus, once Sandy loses its tropical cyclone status it will be know as "Post-tropical Cyclone Sandy" in NWS products.
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