By Bill Kappel
For the second month in a row, temperatures were much warmer than normal and precipitation was below normal in October. This mild and dry pattern is typical of a fall season when we are entering into a La Niña pattern. This generally produces a large and persistent ridge of high pressure over the Southwestern U.S. This keeps the storm track to our north and prevents any intrusions of cold air. This has been the pattern so far in both September and October.
However, as the fall progresses and we head into winter, colder air to our north will start to take over and the ridge of high pressure will begin to weaken and retreat to the south. This will allow intrusion of colder air move in. So, after a slow start to the season, plan for a return to more normal, i.e. colder, weather to start as we head into winter.
Given all this, it’s not surprising that the only day in the first two weeks of the month with below normal temperatures was Oct. 1st and even then, temperatures were not cold, with highs in the mid-60s after morning lows in the upper 30s. From then through the 18th temperatures were above average every day, with the warmest temperatures from the 8th through the 12th. Highs reached into the low to mid-80s on the 2nd and 5th, then were consistently in the mid to upper 70s from the 7th through the 16th.
The one good aspect of the quiet and dry weather was an extended fall season where the fall colors were allowed to peak without any interference from cold and snow. Hopefully you had a chance to enjoy the scenery because you know it won’t last. The only interesting weather during this time was the fact that we saw our first below-freezing temperatures on the morning of the 16th. This was about three weeks later than normal. And not surprisingly, temperatures did not fall below freezing again until the last week of the month.
The only interruption until the end of the month occurred as a cut-off area of low pressure dropped down the west side of the Rockies on the 17th through the 21st. There wasn’t a lot of cold air with this storm, and therefore we mainly received rainfall on the Palmer Divide. However, during the heaviest precipitation on the afternoon and early evening of the 18th, some wet snow mixed in over the highest locations.
The storm brought several days of much needed moisture, with a half inch to an inch accumulating in most locations. The better news was these systems brought the first significant snowfall of the season to the high country, with nearly 2 feet of snow accumulating over the San Juan mountains of southwestern Colorado.
Once this storm departed, quiet and mild weather returned, with lots of sunshine and above normal temperatures again from the 22nd through the 29th. Then, just in time for Halloween, our first winter-type cold front moved into the region. This produced colder temperatures (although only back to normal) and some snow in the region.
A look ahead
November is generally dry and cool around the region. We usually get several light snowfalls interspersed with sunny skies. Gusty winds commonly develop on a couple of days as the jet stream becomes more active and directly affects Colorado. High temperatures average in the upper 40s early in the month to low 40s by the end with overnight lows often dipping into the teens and single digits.
October 2024 Weather Statistics
Average High 68.7° (+9.2°); 100-year return frequency value max 67.7° min 50.7°
Average Low 37.5° (+8.2°); 100-year return frequency value max 36.8° min 26.4°
Monthly Precipitation 0.60” (-1.13”); 100-year return frequency value max 4.63” min 0.18”
Monthly Snowfall T” (-11.0”)
Highest Temperature 84° on the 2nd
Lowest Temperature 25° on the 31st
Season to Date Snow T” (-11.0”) (the snow season, Oct. 1 to Sept. 30)
Season to Date Precip. 24.45” (+2.93”) (the precipitation season, Jan. 1 to Dec. 31)
Heating Degree Days 369
Cooling Degree Days 0
Bill Kappel is a meteorologist and Tri-Lakes resident. He can be reached at billkappel@ocn.me.
Other Weather articles
- November Weather Wrap (12/5/2024)
- September Weather Wrap (10/5/2024)
- August Weather Wrap (9/7/2024)
- July Weather Wrap (8/3/2024)
- June Weather Wrap (7/6/2024)
- May Weather Wrap (6/1/2024)
- April Weather Wrap (5/4/2024)
- March Weather Wrap (4/6/2024)
- February Weather Wrap (3/2/2024)
- January Weather Wrap (2/3/2024)