Flash Flood Warning

  • A Flash Flood Warning is issued for life/property threatening flooding that will occur within 6 hours.


  • Very heavy rain in a short period of time can lead to flash flooding, depending on local terrain, ground cover, degree of urbanization, amount of man-made changes to the natural river banks, and initial ground or river conditions.


  • Dam breaks can also create flash flooding.


    • National Weather Service
    • Denver/Boulder, CO Weather Forecast Office
    • 325 Broadway
    • Boulder, CO 80305-3328
    • 303-494-4221
    • Page Author: BOU Webmaster
    • Web Master's E-mail: w-bou.webmaster@noaa.gov
    • Page last modified: 26-Nov-2005 2:03 AM UTC
    USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.