National Weather Service United States Department of Commerce
Untitled 2

New Polygon-Based River Flood Warnings


On June 16, 2014, The National Weather Service Forecast Office New York, NY began issuing polygon-based river flood warnings and statements for six river forecast points across the hydrologic service area. Using the new polygon warning method reduces the warned area by a significant amount compared to the county-based river flooding warning. This change in warning methodology aligns river flood products with other polygon-based warning products, and will be displayed on the Watch/Warning/Advisory Map on our home page. The following are examples of the new polygons for each of our six river forecast points.


BEAC3: Naugatuck River Above Beacon Falls
GRDN6: Wallkill River at Gardiner
JCYC3: Quinebaug River Above Jewitt City
LODN4: Saddle River at Lodi
MAWN4: Ramapo River at Mahwah
YTCC3: Yantic River at Yantic


The only change to the warning text product will be the addition of lattitude/longitude pairs, which produce the warning polygons, after the last ampersands (&&). There are no changes to the VTEC (header). The following is an example for the Saddle River at Lodi.


Top of Page | Home