Historic flooding has affected much of eastern Colorado this week in an unusual pattern.
Rainfall amounts of more than one foot the past few days have sent water rushing through the front range of the Rockies.
In Boulder, the flood waters have been particularly bad, with some of the heaviest rains falling just west of the city. That prompted an evacuation for parts of Boulder during the overnight hours. The damage pictures and videos continue to reveal the scope of the damage, although the extent of this damage won't be known until the flood waters settle and the pattern begins to change.
Several factors led to the severe flooding, including terrain. Our Google Earth mapping shows the sharp contrast of the landscape just to the west of city. The flood water accelerates and rushes down these valleys and canyons, causing so much of the destruction we see.
The pattern responsible for this flooding can be linked to a tropical plume of moisture feeding into Colorado from Mexico. These monsoon rains are a seasonal event in this part of the country, but a slow moving low pressure center over the Southwest is making the situation much more intense than usual.
Some of this moisture will make into KELOLAND on Saturday, but the system will not be nearly as strong.