Monthly Archives: November 2021

Latest first snow, Chinook winds

5:45 AM MST, Saturday, November 13, 2021

I’m getting questions about the lateness of this season’s first measurable snow (measurable is 0.1 inch). Most parts of the Front Range foothills and plains had a trace of snow on November 1-2. In Cheyenne and around the Fort Collins/Loveland area, there was measurable snow at that time. But for official recording locations in Denver, Boulder and Colorado Springs, there has not been measurable snow yet.

November 21, 1934 is the latest Denver has gone without its first measurable snow. November 19, 1900 is the latest in Boulder (the records show November 26, 1978, but the observer missed several snowfalls in October that year). We will get a cold front through the region Tuesday night/Wednesday, but the chances for measurable snow are slim. So we are still in the running for the record. This is especially noteworthy since only a year ago we saw record early snow on September 8, 2020.

For the immediate future, the word is windy. Between today and Tuesday there will be warm weather, but with occasional periods of very gusty Chinook winds out of the west in and near the foothills.

Dry, mild weather returns

6 AM MDT, Wednesday, November 3, 2021

The cool, damp weather of the last few days will begin to release its grip after some dense morning fog in some parts of eastern Colorado. Afternoon temperatures today will be milder than we have seen in a few days. Thursday through Monday should bring dry weather with unseasonably mild temperatures. Windy conditions are likely to develop on Friday for some areas in and near the foothills.

Looking farther away, a significant solar flare took place (second on in a week), and a solar storm is heading toward Earth. This should trigger aurora borealis (northern lights). Like the one a fews days ago, it probably won’t be visible as far south as Colorado. But forecasting solar storm impacts is quite challenging, so if you in a dark area tonight (or very early tomorrow), take a look to the north in case the sky is glowing this far south.