Larimer County, in Northern Colorado, is facing a serious weather emergency this Thursday afternoon, as the National Weather Service in Denver issued a flash flood warning at 1:23 p.m. MDT. The alert is in effect through 4:30 p.m., with intense thunderstorms triggering heavy downpours across parts of the Cameron Peak Burn Scar, particularly within the Miller Fork Basin and Buckhorn Creek Basin.
According to the NWS, this is a life-threatening situation. Rapid flooding of creeks, streams, and ditches is already occurring or expected imminently. The steep terrain, weakened by wildfire scars, heightens the risk of debris flows, which may carry rocks, mud, vegetation, and unsecured materials. In some zones, driveways and roads could be completely washed away.
By 2:30 p.m., updated Doppler radar imagery showed that the region had already received up to 1.5 inches (38 mm) of rain. The localized, torrential storms are capable of pushing even more water downhill quickly, leading to sudden surges that pose severe hazards to nearby communities, including Glen Haven.
The warning specifically affects areas in and around the Cameron Peak burn scar, which remains highly vulnerable following past wildfires. The thunderstorm-driven flooding could cause mudslides and washed-out routes, especially across unpaved or compromised roads.
A flash flood differs from regular flooding in how fast it develops. These violent surges can form within minutes of heavy rainfall and may affect locations even if they’re not currently experiencing precipitation.
It’s important to understand the distinction between a flash flood watch and a flash flood warning. A watch signals that flooding might happen — a warning means it is happening or about to, and you must act immediately. The NWS strongly emphasizes moving to higher ground without delay if you’re in a flood-prone area.
In today’s case, conditions are rapidly shifting, and the terrain shaped by the 2020 Cameron Peak Fire is acting as a dangerous funnel for runoff. Flash floods in these scars can trigger fast-moving and dense debris flows, especially on or near hillsides, creeks, and small tributaries. Residents near Buckhorn Creek and Miller Fork should stay extremely vigilant.
The situation continues to evolve with the potential for additional storms this evening, particularly in the north-central Colorado highlands. Weather radar and alerts should be monitored closely by anyone near the affected regions, especially those traveling through Larimer County.
