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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.
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Current Weather

Clear

Clear

62°F

UV Index
0 Low
Pressure
29.7 Steady
Visibility
8 miles
Dewpoint
35 °F
Humidity
36%
Wind
SSE 3.1 mph
Gust
4.9 mph
Wind Chill
62 °F

Hourly Forecast

Today
1 AM
60°F
Clear
Today
2 AM
58°F
Clear
Today
3 AM
57°F
Clear
Today
4 AM
55°F
Clear
Today
5 AM
54°F
Clear
Today
6 AM
53°F
Sunny
Today
7 AM
57°F
Mostly sunny
Today
8 AM
64°F
Partly sunny
Today
9 AM
71°F
Partly sunny
Today
10 AM
75°F
Partly sunny
Today
11 AM
79°F
Partly sunny
Today
12 PM
82°F
Partly sunny

7 Day Forecast

Sunny

Monday

88 °F

Sunny and very warm with the temperature approaching the record of 91 set in 1962


Clear

Monday Night

53 °F

Clear


Partly sunny

Tuesday

88 °F

Very warm with partial sunshine; breezy in the afternoon


Clear

Tuesday Night

50 °F

Breezy in the evening; otherwise, clear


Partly sunny w/ showers

Wednesday

73 °F

Cooler with sunshine giving way to clouds, becoming windy with a shower in the area in the afternoon; elevated fire risk due to gusty winds and low humidity


Cloudy

Wednesday Night

46 °F

Overcast


Intermittent clouds

Thursday

71 °F

Beautiful with intervals of clouds and sunshine


Mostly cloudy

Thursday Night

43 °F

Cloudy most of the time


Intermittent clouds

Friday

71 °F

Beautiful with times of clouds and sun


Intermittent clouds

Friday Night

45 °F

Partly cloudy


Sunrise and Sunset

Sunrise
5:48 AM
Sunset
8:06 PM

Based on AccuWeather data