Decembrrrrr Has Arrived

Much Colder Temperatures And Light Snow Coming

A cold front moved through the region early Tuesday afternoon bringing breezy conditions and a quick drop in temperatures. The readings prior to the front were in the mid 50s and within an hour had dropped into the low 40s! But that is only the beginning! Lows overnight on Tuesday are expected to drop into the teens with Wednesday's highs only getting into the low 20s!

Light snow will develop late Tuesday evening, but there will be limited moisture with the passage of this cold front, so we are only expecting light accumulations, about 1 to 3 inches in Denver Tuesday night and early Wednesday. The foothills and mountains could pick up between 3 to 5 inches, but no watches or warnings are in effect at this time.

The colder weather will be with us for awhile, and will probably last through the coming weekend. Overnight lows will dip into the teens on Wednesday morning, with single digits by Thursday morning. Highs on Thursday will be lucky to break out of the teens! This will be the coldest string of temperatures for the season so far.

The second storm system is proving a little trickier. Our forecast models aren't resolving this new system very well right now, due to a complex high pressure system over Alaska. We will have to wait for later model runs to determine whether we will see heavier precipitation for the first weekend of December or if it will hold off until early next week.

Meanwhile, the El Nino situation is getting interesting. The National Oceanic and Atmospheric Administration says the El Nino pattern is strengthening, and will likely last through this winter. What does that mean for Colorado's weather? Generally, Denver's temperatures are above-average over the course of an El Nino winter, with below-average precipitation. This is due to a more southerly storm track, with lows passing far to our south. However, as we get closer to spring, the southern branch of the jet stream sometimes moves a bit further north, bringing strong cyclones from the Pacific right over Arizona and New Mexico. That means the possibility of a snowy March and April. That's the way it has worked in the past. We will keep you posted on the impacts of El Nino throughout the winter season.