National Weather Service United States Department of Commerce

Severe Storms; Fire Danger; and Strong Pacific Storms

More strong storms on tap for the Pacific Northwest this weekend. Heavy rains could produce flooding and mudslides. Saturday, a cold front moving into the central U.S. will bring potential for severe thunderstorms containing damaging winds, large hail, and isolated tornadoes; and localized flooding potential. Dry winds in southwestern California will keep fire weather threats high. 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