With the heavy rainfall this afternoon, the City of Boulder is expecting to see an increase in Boulder Creek water levels. Last night, the creek was running at 161 cfs. It is currently at 287 cfs and is likely to run between 500 and 600 cfs by nightfall. This is not expected to cause significant spillage along the banks, but pedestrians and cyclists in the area are urged to use caution. Please remember that it is not safe to seek shelter under bridges or in other underpasses. These are designed to move floodwaters through and can be very dangerous in these conditions.
The city is also receiving some reports of nuisance street flooding in the Table Mesa area and a few other neighborhoods. Safety officials would like to remind motorists to avoid driving through floodwaters, which can be deeper than they may seem.
The National Weather Service currently has the Fourmile Burn Area under a flash flood watch until 6:00 a.m. tomorrow. The flash flood watch includes Boulder County areas and the City of Boulder only due to runoff risks associated with a storm over the burn area. There is not a threat to the City of Boulder at this time. The Boulder Office of Emergency Management is currently monitoring storm activity at the EOC for the City of Boulder and Boulder County.
The Flash Flood Warning for the Fourmile Burn Area has been lifted. The Flash Flood Watch for the same area is in effect until 6: 00 a.m. tomorrow. The EOC is closing and staff will evaluate weather risks in the morning and monitor the situation throughout the day. All-Clear messages have been sent to the Fourmile Canyon Creek residences at 11:42 p.m. tonight.
The weather outlook for the remainder of the night appears to be more storm lines moving through the area until morning. There will be periods of decreasing rainfall or no rainfall at all. Do not drop your guard because the cycle will repeat many times until morning. Please be sure to obtain weather information tomorrow to get an accurate forecast of the conditions for the day.
At 9 p.m. on 07/06/2012 a series of strong thunderstorm cells were identified by the National Weather Service heading for the Fourmile Burn Area. The storms are capable of producing 1/2 inch to 1 inch of rain over one hour. Given the previous steady rain throughout the day the National Weather Service issued a Flash Flood Watch at 9:05 p.m. for the Fourmile Burn Area. Due to the continuous rainfall and possible intensity a flash flood warning was issued at 9:15 p.m. for the same area and is in effect until midnight. Weather Advisory notices were sent to 365 phone numbers in the Fourmile Creek area. Evacuation notices were sent to 77 phone numbers in Fourmile Canyon Creek area affecting residences along Pinto Court and Wagon Wheel Gap Road.
The Boulder EOC is open and monitoring the situation and working closely with Sheriff's Deputies, Boulder Mountain Fire Protection District and Fourmile Fire Protection District officials. The City of Boulder is not under any flash flood warnings and there is not a threat to businesses or residences in the City of Boulder at this time.
Gold Run Road and Fourmile Canyon were closed temporily due to flooding, but have now since re-opened. No major damage has been reported.
Minor debris on the road between Logan Mill to Ingram Gulch area is being cleared by County Road Crews.