PLEASE REFRESH PERIODICALLY FOR THE MOST CURRENT INFORMATION.
The severe weather threat for Boulder County has passed and only very light rain showers are in the forecast for the rest of the night. Boulder OEM is no longer monitoring weather.
Light Storm development has increased over Eastern Boulder County delivering 4/10 ths of rain per hour. No risk at this time and the storm action appears to be moving to the south and building to the East. The storm could be over Lafayette and Louisville within 45-60 minutes. Boulder OEM will continue to monitor storm development. The severe weather impacts remain south of the Boulder County with flash flood warnings just issued for Evergreen in Jefferson County and also Elbert County.
The storm activity currently is isolated to the northern foothills around Lyons and producing .04/10 of an inch which is very light. Storm development to the west and south of Boulder County is light to non-existent at this time. Light storm development is still north of the county but it appears that the high threat period for storm activity has passed but light rain is expected throughout the County over night. Boulder OEM will continue to monitor over the next four hours to make sure that any developing threats are monitored. If storm activity remains light in nature severe weather monitoring will stop at 2 a.m.
Currently the heaviest rainfall is occurring on the plains over west Longmont, Hygiene and in the foothills around Lefthand Canyon at a rate of around 1/2 inch per hour. All creeks and rivers are holding with in acceptable flows. No reports of flooding due to river or creeks flowing out of their banks. The storm is slow moving building back towards the foothills and into the Fourmile area and should not exceed 1/2 per hour in these areas. It is expected to rain lightly throughout the night after midnight and the strongest storm activity is over the eastern part of the state. Rain should increase over North Boulder, Niwot and Louisville over the next hour. Boulder Emergency Management will continue to monitor the situation and update as needed.
As of 4 p.m. MDT – Creek levels and flows are up all around Boulder County due to recent rains. The Boulder OEM will continue monitoring conditions for any flooding risks or threats.
Forecasts can change on a moment’s notice. Stayed tuned to the National Weather Service for current conditions. Please report any significant flooding events in unincorporated Boulder County (water over-topping roads, spilling out of stream banks, etc.) to Boulder County Sheriff’s dispatch (303-441-4444) or your local Fire Protection District. Be prepared to evacuate to higher ground if you’re in an area prone to areal flooding (from the ground up) or flash flooding. Call 9-1-1 if you’re in a life threatening situation.
If your home or property in unincorporated Boulder County is damaged by severe weather, contact the Boulder County Flood Rebuilding & Permit Information Center at 303-441-1705 or email to report or ask questions about damage to your property (repair or other). (Non-emergency only.)
See more Flood Ready tips below.