9 AM MST, Sunday, February 17, 2019
Very cold temperatures are into southeastern Wyoming and western Nebraska now and will work their way into eastern Colorado and the Front Range region this afternoon. Temperatures this evening are expected to fall into the single digits along the urban corridor and probably only reach the 15-20 degree range Monday and Tuesday.
A big snowstorm is not expected, but rather and extended period (this evening through Tuesday) of mostly cloudy skies and periods of mainly light snow. There is not much moisture with this storm, but what moisture there is may convert into rather fluffy snow.
There will probably be some local accumulations around 6 inches by Tuesday in and near the foothills from Boulder County southward. Most areas will probably be under 6 inches. The chance for greater than 4 inches is about 20%. The most likely accumulations are:
2-4″ Boulder, Broomfield, Colorado Springs and metro Denver west of I-25 and south of I-70.
1-2″ northeast Denver, Longmont, Fort Collins, Cheyenne
Although the temperatures should be less cold Wednesday, it will likely be a cold week overall, with another chance for clouds and light snow late Thursday or Friday.
7:30 AM MST, Saturday, February 16, 2019
Each day during this 3-day weekend will be colder than the one before so that by Monday the entire region should experience very cold temperatures. Some snow is possible throughout, but for the Front Range foothills and urban corridor the best chance for accumulation is Sunday evening through Monday.
Snow will be mainly near the continental divide today where there may be some wintry travel at the high passes. Some flurries or sprinkles may break off and move over the foothills and urban corridor, but little or no accumulation is expected. Although temperatures are likely to get no better than the 30s, today will be the “warm” day of the weekend.
Temperatures will likely climb to the 30s in the low elevations Sunday before an arctic front late in the day plunges temperatures into the single digits Sunday evening. Monday and Tuesday are likely to be mainly cloudy with temperatures reaching the teens to near 20 and falling to within a few degrees of zero at night.
Snow: For the foothills and urban corridor accumulating snow is likely to accompany the very cold temperatures Sunday evening and Monday and possibly extending intermittently into Tuesday. The most (3-6″) will probably occur in and near the mountains and foothills of Boulder, Broomfield, Jefferson, Gilpin, and Douglas counties (including Boulder, Nederland, Castle Rock, and the west/south side of Denver). As you go northeast there may only be a dusting to an inch in Weld County, eastern Larimer County, DIA, and around Cheyenne.
Noon MST, Thursday, February 14, 2019
At noon it was in the upper 50s in metro Denver and the low 30s in far northeastern Colorado. The cold front is right about at DIA and marching west, so the afternoon will be turning colder with some areas of low clouds developing. As moist Pacific air streams across the region from the west, there will continue to be snow near the continental divide. That moisture will probably result in a few areas of light snow (or a bit a rain at first) this evening in eastern Colorado, including the urban corridor. Accumulations, where they occur, are likely to be minor.
The cold air will probably get pushed back to the east during the day on Friday by milder westerly flow, but the chinook winds with it are likely to be more localized than the intense gusts last night. On Saturday the next cold front is likely to arrive by afternoon perhaps accompanied by some gusty north or northwest winds. Little or no precipitation is expected with it.
The remainder of the holiday weekend and the start of the workweek is looking colder than average, perhaps staying below freezing all day even in the lower elevations by Monday. There is a chance for light snow amounts. I’ll update over the weekend if the snow chances start looking more certain for Sunday or Monday.
12:10 PM MST, Monday, February 11, 2019
If you are growing weary of the cold weather there is good news and bad news. The good news is that Tuesday and Wednesday (and probably a chunk of Thursday) are likely to see milder weather. I don’t expect t see widespread 60-degree weather for the urban corridor, but daytime temperatures reaching the 50s appear likely by Wednesday.
The bad news (or good if you like winter) is that the recent pattern of colder-than-average weather for the western U.S. is still in place and may re-assert itself along the Front Range late in the week or over the 3-day weekend. Some guidance suggests that Sunday or Monday could be snowy. I will update that possibility later this week.
5:30 AM MST, Tuesday, February 5, 2019
Colder weather with snow, mainly from metro Denver northward, will move into the area on Wednesday. Unlike the last two storms that impacted the morning commute, this one appears timed to impact the afternoon/evening commute.
For mountain areas near and west of the continental divide, the snow is likely to begin later today as the storm approaches with totals by Thursday morning of 6-12″.
For the eastern foothills and plains the accumulating snow should hold off until Wednesday, and especially Wednesday afternoon and evening. Widespread accumulations of 2-5 inches are likely from metro Denver to Cheyenne with the heaviest a little more likely in the west suburbs of Denver. Colorado Springs will probably receive less than an inch.
The snow will be accompanied by temperatures falling through the 20s and into the teens. The snow should be over by Thursday morning with temperatures in the 0 to 10 range.
9:30 AM MST, Sunday, January 27, 2019
After a mild and windy day along the Front Range, a cold front is likely to drop temperatures at least 25 degrees for Monday. Several areas of snow are likely to develop late tonight and early Monday morning resulting is some intermittent snow. Accumulations, where they occur, should be mainly 2 inches or less. The best chance for 2 inches is in the Palmer Divide region and the south suburbs of Denver.
During the next 4-5 days there will be an impressively cold arctic air mass to our east that is likely to set some historic record lows in the upper Midwest. To the west of Colorado/Wyoming warmer than average weather will dominate. Eastern Colorado (including the Front Range region) is likely to be a little more under the influence of the cold side of the pattern through midweek, although not nearly as extremely cold as it will be a little farther to the east. There appears to be a good chance of the warm side of the pattern taking over by the end of the week.
6 AM MST, Thursday, January 24, 2019
An area of snow is causing some wintry road conditions this morning from Longmont northward. That area is slowly sagging south. Many parts of the Denver Metro are likely to see a bit of snow in the next few hours, ending this afternoon. Accumulations should be minor, a trace to 2 inches, but it could slow traffic down a bit during the morning commute.
A dry weekend is expected with the next cold front and chance for snow Sunday night or Monday.