National Weather Service United States Department of Commerce

Severe Weather and Heavy Rain Continues in the Central U.S.; Mountain Snow Across Much of the West

Scattered severe thunderstorms, associated with tornadoes, large hail, and wind damage, are likely through Monday night from the Southern Plains into the Ozarks and mid Mississippi Valley. An Enhanced Risk (level 3 of 5) has been issued. Heavy mountain snow is expected to impact the higher terrain of the Pacific Northwest, Intermountain West, and Rockies for much of this week. 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.

 

 


Headwater Guidance Text Product

 

Headwater Guidance

The Flash Flood Guidance Text Products (BOSFFGMA, BOSFFGME and BOSFFGNY) were discontinued on April 1, 2019.