First freezes this week, first snow possible

1 PM MDT, Sunday, October 7, 2018

The lower elevations of the Front Range and eastern plains are likely to see the temperature dip below freezing in most areas several times this week, perhaps beginning with Monday night. There is also a chance for minor amounts of snow in the Denver-Boulder-Fort Collins corridor, but that’s a smaller chance than the freezing temperatures.

A large storm system to the west of Colorado is elongated in the north-south direction which reduces the coverage of precipitation along the Front Range (less easterly flow). As that storm approaches and moves through between now and Monday night we are likely to see an increased chance for some periods of precipitation beginning late Sunday and lasting into Monday night. Even after the main storm moves through, this cold, unsettled pattern may bring some more intermittent precipitation late Tuesday/early Wednesday, and again around Thursday night.


Snow versus rain

Snow levels should drop to the upper foothills tonight, probably low enough for minor amounts of snow in Nederland and Estes Park. Snow levels should drop slowly on Monday and may get down to the elevation of the urban corridor late Monday, about the time that the precipitation might be tapering off. Local areas of heavier precipitation are more likely to see the lower snow levels, so the occurrence of snow accumulation might be spotty. The chance for measurable snow in Boulder and Denver is small, about 1 in 4. There could be another small chance late Tuesday or early Wednesday.


Areas above treeline are likely to see over 6 inches during the next few days.


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