Flood Hydroclimatological Analysis

DFO1999-076

Flooding: 09/14/99-10/04/99

Eastern U.S.-Hurricane Floyd

(1) 14 Day Precipitation History

TRMM TMI Quick Look Images, subsetted at Dartmouth from global mosaics prepared by Chris Kidd, NASA-Goddard Space Flight Center

Comments:

Heavy rainfall began along the eastern U.S. coastline as Hurricane Floyd approached and then made landfall 9/15. Northward passage of the storm, which brought flooding as far north as New Jersey and New York, is recorded by TRMM TMI data for 9/16. A tropical disturbance from the Gulf of Mexico then brought renewed heavy rain on 9/20 to the Carolinas; this was followed in North Carolina by heavy rain due to the passage of a front 9/22 and then a subsequent tropical disturbance 9/26-9/27. The severity of flooding in North Carolina was related to the cumulative effects of precipitation inputs from Floyd and these three storms that immediately followed.

In these images:

Rainfall and snowfall: yellow and white areas (yellowish white is highest intensity precipitation)

Oceans: light blue (low water vapour) to dark blue (high water vapour)

More information: http://trmm.gsfc.nasa.gov/data/quicklook/

 09/14/99 09/15/99 09/16/99 09/17/99 09/18/99 09/19/99 09/20/99
             
 09/21/99 09/22/99 09/23/99 09/24/99 09/25/99 09/26/99 09/27/99
             

(2) 21 Day Streamflow history (available for U.S. only).

Maps are subsetted at Dartmouth from NOAA's Hydrologic Information Center internet location (today's version only is posted there): http://www.nws.noaa.gov/oh/hic/current/river_flooding/graphicsum.gif

Yellow: 0-5 ft above flood stage; Red: 5-10 ft above flood stage; black stars: > 10 ft above flood stage.

 

 09/14/99 09/15/99 09/16/99 09/17/99 09/18/99 09/19/99 09/20/99
             
 09/21/99 09/22/99 09/23/99 09/24/99 09/25/99 09/26/99 09/27/99
             
 09/28/99 09/29/99 09/30/99 10/01/99  10/02/99 10/03/99 10/04/99
             

 


 

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