National Weather Service United States Department of Commerce

Severe Thunderstorms for the Midwest, Monsoon in the Southwest, Heat Continues in Southern and Central U.S on Wednesday

Strong to severe thunderstorms will be possible Wednesday in portions of the Midwest. Heavy rain, hail and damaging winds will all be possible, but a tornado cannot be ruled out either. The monsoonal flash flood threat remains in the Desert Southwest and Southern Rockies. Hot temperatures continue in the Southern Plains and Mississippi Valley. Heat Advisories are in effect. Read More >

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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.

 



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