Wednesday July 20, 2021 Forecast First


If you call it a debris flow or a mudslide, doesn’t matter because I-70 is still closed due to the heavy rains of late.

Multiple debris flows over the Interstate in the Glenwood Springs Canyon have resulted in a lengthy closure of I-70. The northern detour route at Rifle (EB) and at Wolcott/Kremmling (WB) is in effect until further notice. The debris flows occurred because of heavy downpours and more of this stormy pattern is expected through the end of this week, the weekend and into next week. That’s a 7-10 day pattern of this summer thunderstorm pattern. Officially it’s called the NAM, North American Monsoon and while the Western Slope is on the northern periphery of it, it can last through late September. The pattern will consist of warm/hot muggy starts (humid for the Western Slope) and strong thunderstorms initiating over the mountains and drifting over the valleys to finish each day. Some of these storms will linger into the late night hours. Gusty wind speeds, small hail and lightning, in addition to the lowered visibility from the heavy downpours and the flooding concerns… will be the ongoing hazards.

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