12 inches of snow possible on I-25: “First impactful snow” of season for Front Range

With what the National Weather Service is describing as the “first impactful snow for the I-25 corridor” of the season ahead, Coloradans are already being told to expect a slow, slick, and hazardous commute on Wednesday morning. Snow is expected to start falling around midnight on Tuesday, continuing into Wednesday in this part of the state.

While it’s likely the Front Range will get hit harder than it has thus far this fall, it’s also worth noting that a large swath of the state could see totals of up to 12 inches (or more in some select areas) through Friday morning.

In the ‘expected’ snowfall scenario, which comes with an 80% chance, most of Colorado gets at least some snow this week, with up to six inches possible in Denver, eight in Castle Rock, and six in Colorado Springs through Friday morning. Meanwhile, many mountain peaks get snow in the range of six to 12 inches through Friday morning in this scenario, with some peaks in southern Colorado having potential for between 12 and 18. Travel in the mountains is sure to be impacted, with parts of I-70 expected to get between six and 12 inches of snow.

See the map of the ‘expected’ and most likely snowfall scenario below (and keep scrolling for the ‘high-end’ snowfall report):

The ‘expected’ snowfall scenario with an 80% chance. Map: National Weather Service.

As far as the high-end forecast goes, this scenario would likely bring some major implications for many Coloradans during their travels this week. Deeper snow totals are much more widespread, with parts of I-25 having the potential for between eight and 12 inches, including most of I-25 south of Denver. Southern and central Colorado get hit the hardest.

See this scenario depicted on the map below:

The ‘high-end’ snowfall scenario with a 10% chance. Map: National Weather Service.

As far as the timing of this snow goes, it’s looking like most of it will land on the Front Range and in southern Colorado between Tuesday night and Wednesday. The central mountains could get snow throughout the week.

As the storm continues to develop, find additional forecasting information from the National Weather Service here.

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