Showing posts with label Flood. Show all posts
Showing posts with label Flood. Show all posts

Thursday, March 20, 2014

NOAA predicts moderate flood potential in Midwest

According to NOAA’s Spring Outlook released today, rivers in half of the continental United States are at minor or moderate risk of exceeding flood levels this spring with the highest threat in the southern Great Lakes region due to above-average snowpack and a deep layer of frozen ground. Additionally, drought is expected to continue in California and the Southwest. 
 
The continuation of winter weather, above-average snowpack, frozen ground and thick ice coverage on streams and rivers will delay spring flooding into April in the upper Midwest eastward to New England. The intensity of the flooding will depend on the rate of snow and ice melt, and future rainfall.

http://www.noaanews.noaa.gov/stories2014/20140320_springoutlook.html 


Tuesday, February 11, 2014

Experimental Storm-Surge Maps to Accompany NOAA Hurricane Projections

Emergency management crews will have another tool to help them protect low-lying areas from flooding the next time a hurricane approaches.

Beginning this year, the National Hurricane Center's projections will include surge maps that show where flooding is expected along the Gulf and Atlantic coasts.

Flooding that usually accompanies a hurricane is caused by a storm surge -- a rise in ocean water caused by the atmospheric pressure and wind that pushes water landward. Storm surges can kill, with nine out of every 10 deaths from hurricanes caused by the surge or its flooding, according to Federal Emergency Management Agency statistics.

The surge maps, which will be experimental for at least two years, will be issued at the first sign of a hurricane or tropical storm watch and will be continuously updated with each new hurricane forecast, typically issued every six hours, according to a release from hurricane center's parent agency, the National Oceanic and Atmospheric Administration.

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