Skip to content
Join our Newsletter

Tuesday Update: Longmont Weather Forecast: Mild and dry for another week...

Figure5_11272021
Figure 5: the 10 day (10:1 ratio) total snowfall forecast from the GFS and weather5280.com

In Brief:

Abnormally warm weather and abnormally dry weather continues.

Tuesday update:

Things continue abnormally dry and fantastically warm (it would be in the 120'sF if this were the peak of summer). There IS a hint of a snowstorm arriving Tuesday to set our new latest snowall and longest snow-free period at DIA.  More later!

End Tuesday Update.

Forecast Discussion:

Sorry, we still don't have rain or snow coming for the I-25 corridor. Temperatures will remain about 20 to 25 degrees above normal (Figure 1).  No significant precipitation is expected over the next 7 days (Figure 1).  This is due to a persistent western U.S. ridge (blue line in Figure 2).

Figure1_11272021
Figure 1: the 10 day graphical forecast from weatherunderground.com for Longmont, CO.
Figure2_11272021
Figure 2: the 500mb upper air forecast map for Sunday noon from the GFS and tropicaltidbits.com

The Long Range Forecast:

The ridge is still somewhat dominant even a week out (Figure 3). The western slopes should get some precipitation (Figure 4) and snow (Figure 5). Not much is expected along I-25 for the next 10 days. 

Figure3_11272021
Figure 3: Figure 1: the 500mb upper air forecast map for Friday noon from the GFS and tropicaltidbits.com
Figure4_11272021
Figure 4: the 10 day precipitation total from the GFS and weather5280.com
Figure5_11272021
Figure 5: the 10 day (10:1 ratio) total snowfall forecast from the GFS and weather5280.com

 


About the Author: John Ensworth

John Ensworth used to work from Longmont as the PI for the NASA through the IGES (The Institute for Global Environmental Strategies). He now teaches technology, algebra, astronomy, meteorology, film school, and Lego robotics to middle/high school.
Read more


Comments


Current Weather

Mostly clear

Mostly clear

0°F

UV Index
0 Low
Pressure
30.42 Falling
Visibility
7 miles
Dewpoint
-2 °F
Humidity
92%
Wind
WNW 1.1 mph
Gust
2.3 mph
Wind Chill
0 °F

Hourly Forecast

Today
3 AM
-2°F
Clear
Today
4 AM
0°F
Clear
Today
5 AM
2°F
Clear
Today
6 AM
3°F
Clear
Today
7 AM
7°F
Clear
Today
8 AM
10°F
Sunny
Today
9 AM
14°F
Sunny
Today
10 AM
21°F
Sunny
Today
11 AM
27°F
Sunny
Today
12 PM
33°F
Sunny
Today
1 PM
36°F
Sunny
Today
2 PM
38°F
Sunny

7 Day Forecast

Snow

Tuesday

29 °F

Colder with a little snow


Cold

Tuesday Night

-2 °F

Clear to partly cloudy and frigid


Sunny

Wednesday

38 °F

Plenty of sunshine


Snow

Wednesday Night

23 °F

Increasing clouds with a little snow at times, mainly later with little or no accumulation


Snow

Thursday

37 °F

A little snow at times, accumulating a coating to an inch


Clear

Thursday Night

6 °F

Clear and colder


Mostly sunny

Friday

40 °F

Sunny to partly cloudy


Mostly cloudy

Friday Night

26 °F

Mostly cloudy


Partly sunny

Saturday

43 °F

Partial sunshine


Mostly cloudy

Saturday Night

20 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
7:23 AM
Sunset
4:51 PM

Based on AccuWeather data