National Weather Service United States Department of Commerce

Coastal storm will bring wind, rain, and wintry precipitation to the East Coast and New England this week

A strengthening storm system will move from the Southeast U.S. to off the Mid-Atlantic Coast by Monday evening. This storm will bring soaking rains and strong winds to much of the Eastern Seaboard through Tuesday. Interior sections of the Northeast could receive significant snow. Also, the prolonged period of strong onshore winds will result in coastal flooding for the Mid-Atlantic & New England. Read More >

Flash Flood Guidance

 

Flash Flood Guidance is an estimate of the amount of rainfall required over a given area during a given duration to cause small streams to flood. These estimates are based on the current soil moisture and stream flow conditions for the area. Flash Flood Guidance is routinely issued by National Weather Service (NWS) River Forecast Centers, and is used by NWS Weather Forecast Offices when issuing Flash Flood Watches and Warnings to the public. Note: Less rainfall is required to produce flash flooding in urban areas.

 

 


 


 

One-Hour Flash Flood Guidance


 

Latest 1-hour Flash Flood Guidance Graphic.

 

 

Three-Hour Flash Flood Guidance


 

Latest 3-hour Flash Flood Guidance Graphic.

 

 

Six-Hour Flash Flood Guidance


 

Latest 6-hour Flash Flood Guidance Graphic.

 

 


Flash Flood Guidance Text Products

 

Southern New England

Maine & New Hampshire

New York & Vermont

Headwater Guidance