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Click here for Flash Flood Guidance Text Products
Click here for Headwater Guidance Text Products
Flash Flood Guidance products are issued 3 times a day at about 9 am, 2 pm, and 8 pm central time. Headwater guidance is issued twice daily at about 9 am and 8 pm central time. National Weather Service Weather Forecast Offices (WFOs) use this guidance when issuing flash flood watches and warnings to the public. It should be noted that these values are meant to be used only as guidance. Topography and/or urbanization in some areas are also contributing factors to flash flooding.
Flash Flood Guidance is used to predict the occurrence of flash flooding in a specific area based on specified rainfall amounts within a given duration of time. The River Forecast Center (MBRFC) calculates and issues products with guidance values for 1, 3 and 6-hour rainfall totals for 4km by 4km grid points within the MBRFC region. This office also issues a text product of county guidance for the same durations.