Monthly Archives: November 2015

Snowfall is done, but blowing snow may occur is some locations

12:00 noon, Monday, November 30, 2015

As the big storm system pulls away to our northeast, we may see some areas with strong wind gusts out of the northwest tonight and early Tuesday (beginning a bit earlier in the Cheyenne region).  Not everyone will get the strong winds. The highest risk for blowing snow:

Exposed areas in the mountains (parts of Peak-to-Peak highway, I-80 in WY, and I-70 west of Denver),

Some places near the foothills (watch out on Hwy 93, and parts 470 west of Denver, I-25 near the Palmer Divide and the WY border, and U.S. 36 north of Broomfield).

 

The second half of the week should bring milder weather.

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One more round of snow

12:00 noon, Sunday, November 29, 2015

The large, near-stationary storm system to our west that has kept us in clouds and occasional snow since Wednesday night is finally going to wobble through the Front range region tonight. Another round of snow is likely to accompany it late this afternoon or tonight. Amounts should be light, but falling on cold surfaces. Be prepared for winter travel conditions.

 

Expected accumulations: 1-3 inches most areas.

A few locations may get little or nothing (the chance for little or nothing is a little greater in Larimer County and up in Wyoming).

Likewise, a small portion of the area may get a little more than 3 inches from narrow southwest-northeast bands of snow this evening.

 

By the second half of this week we will probably be seeing temperatures climbing back above average for a couple days.

Winter weather spell not over yet

1:40 PM, Friday, November 27, 2015

Cold and unsettled weather is likely to continue into Monday, but not as intensely cold by Saturday afternoon. Also, there will probably be  intervals Saturday-Sunday when the overcast clears out a bit.

 

The snow isn’t completely over either. Although it is mainly insignificant flurries now, the parent storm that is spinning in place to the west of Colorado may spit out some disturbances that will enhance the snow for a few hours at a time.

 

The best chance for minor accumulations (about and inch) over the next 48 hours appear to be this evening into early Saturday morning, but not everyone will get that.

 

As the whole storm finally wobbles through late Sunday into early Monday, there will likely be more accumulating snow in the mountains and parts of the foothills and plains along the Front Range.  I’ll update either tomorrow or Sunday.

 

 

Thanksgiving winter weather update

3:45 PM, Wednesday, November 25th, 2015

As of mid afternoon low stratus clouds were thickening along the Front Range in response to the cold east-northeast flow.  Some areas of light freezing drizzle or snow grains may develop this evening, but amounts should be minor.

 

Later tonight though Friday evening should bring occasional snow (mostly light) and cold temperatures. Temperatures in the urban corridor probably won’t make it to 25 Thanksgiving Day and Friday and fall to the low teens and single digits at night.

 

Total snow Wednesday night through Friday evening:

Mountains and foothills (southeastern Wyoming to Pikes Peak region):   4-8″

 

Denver, Lakewood, Castle Rock, Broomfield, Boulder, Cheyenne:  3-6″

 

DIA, Colorado Springs, Longmont, Fort Collins: 1-4″

 

But when might it snow the hardest?

Good question, but a little tough to answer since the main storm system won’t actually move through. But this is what I think is the most likely evolution:

Phase 1, Wed night & Thanksgiving morning: minor accumulation (mostly 0-1 inch, with up to 2 inches in some spots near foothills).

 

Phase 2, Thanksgiving afternoon and evening: this will probably be the snowiest period. Expect winter driving conditions.

 

Phase 3: Friday: intermittent snow, minor accumulation.

 

Phase 4: although Saturday and Sunday will likely be less cold and a little less cloudy, there is some question about whether there will be more accumulating snow. I’ll update Friday.

Multi-day winter weather stretch begins Wednesday

1:30 PM, Tuesday, November 24, 2015

A cold front Wednesday morning will initiate a cold period that lasts through the weekend. Thanksgiving Day and Friday are likely to be the coldest days, with occasional light snow and maybe freezing drizzle.

 

Timing:

The cold front should move south from Cheyenne to Colorado Springs Wednesday morning (don’t be fooled if it’s still mild early). Low clouds are likely to develop north-to-south late in the day, with some light snow or freezing drizzle possible by Wednesday evening. Occasional snow is then likely Thanksgiving Day and into Friday with temperatures only reaching the 20s during the day.

 

Amounts over 2 days beginning Wednesday evening:

In and near the foothills and Palmer Divide (west & south side of metro Denver, Castle Rock, Broomfield, Boulder, Cheyenne): 3-6 inches. Maybe a thin coating of freezing drizzle Wednesday night-Thursday morning.

 

Eastern plains (east side of metro Denver, Longmont, Fort Collins): 1-3 inches.

 

Colorado Springs area: 2-4 inches (they may get most of theirs on Friday, while Denver-Boulder will probably see more on Thursday than Friday).

 

Front Range mountains: 3-6 inches, the foothills may get more than the higher mountains, and the overcast may thin at times in the higher elevations.

 

Saturday-Sunday: although the overcast may thin out a bit and the temperatures may become less cold, a mild sunny weekend is not expected. As the remnants of the western storm finally moves east, there may be another period of snow, but it’s too early to tell right now.

 

 

 

Wintry Thanksgiving

12:15 PM, Monday, November 23, 2015

A cold front on Wednesday is expected to usher in a multi-day cold spell for the Front Range and eastern plains. Low clouds and some light snow or freezing drizzle are likely for Thanksgiving, but a big snowstorm is unlikely.

 

A large storm system over the West by midweek is likely to spin in place and slowly weaken without ever moving into Colorado. In addition, a large & cold high pressure system is likely to slide down the Front Range  from the north on Wednesday and keep it cold through the holiday weekend, especially Thanksgiving Day and Friday when temperatures are likely to stay in the 20s for the Front Range urban corridor.

 

The cold air will be relatively shallow, so the result is likely to be low clouds and some periods of light snow or, in the lower foothills and plains, some freezing drizzle and ice fog. Nederland stands a better chance of seeing some breaks in the overcast than the lower elevations.

 

So the bottom line is: no major storm is expected at this time, but you should plan for some wintry weather on Thanksgiving, possibly beginning late Wednesday.

A few spots may get brief snow flurries or squalls

12:55 PM, Friday, November 20, 2015

A sharp cold front cruised through Boulder and DIA just before noon, and should be through Colorado Springs by 2 PM. Some narrow bands of snow oriented northwest-to-southeast have developed mainly north of Fort Collins through 1PM. A few local spots around Cheyenne experienced brief heavy snow in those bands.

 

The narrow bands of snow will continue to re-develop and dissipate as the whole areas sags south this afternoon and evening. For the lower foothills through eastern plains, some areas will get little or nothing, while other areas will get a brief period of light accumulating snow. A subset of the area (probably less than 20% of the Front Range region) may receive a brief burst of snow that results in an inch or two.

 

Accumulations (by midnight):

Denver-Boulder-Fort Collins and lower foothills: 0-1/2 inch, with a smaller portion of the area receiving 1/2-2 inches.

 

Colorado Springs: most likely a dusting or zero, with just a small chance of an inch.

 

Nederland, Eisenhower Tunnel approach: an additional 1-3 inches, maybe more up at the high passes.

 

Thanksgiving outlook: After a cold start on Saturday, Sunday -Tuesday should be dry and milder. A large storm moving southeastward through the northwestern U.S. will likely impact travel in mountain areas Tue-Wed to the west of CO and WY. That storm stands a good chance of bringing snow and cold to the Front Range region on Thanksgiving Day, but at this point it’s uncertain if it will be minor or something more significant.