Lyons McConnell Bridge Opening -
Refining rainfall alerts for Jamestown
Since the September 2013 heavy rainfall, flooding, and debris flow devastated the mountain town of Jamestown Colorado, the town has worked to improve early warning for the small community. In order to provide rainfall alerts in advance of flooding and/or debris flows, the town developed a more comprehensive system of rainfall alerts. HUD CDBG-DR funds through the Boulder County Collaborative were used as a matching funding source for the project.
The project performed an analysis of the September 2013 event and found the rainfall alerts did not provide enough lead time. Revised alerts were then developed to take into account soil saturation and longer, continuous rainfall events. The new rainfall alert configuration, along with an added rain gauge, now provides a more robust system that would have provided alerts nearly three hours in advance of the first damage reports during the September 2013 event. These alerts were then combined with a comprehensive communications and community response plan to better prepare the Jamestown community for an uncertain future of heavy rainfall events.
Link : Jamestown Automated Flood Warning System See the Esri Story Map created to tell Jamestown’s story of rainfall and debris flows during the September 2013 flood and then summarize the rainfall alert analysis and gauge installation.
See the project highlighted in the May 2018 Newsletter for the National Hydrologic Warning Council.