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Friday Update: Longmont Weather Forecast: Very comfortable, small storm mid week

In Brief:

Unusually warm weekend then an early week chill.

Friday Update:

This is just a quick update before the weekend!  Other than a couple of cold fronts Monday/Tuesday next week that "may" bring some showers - we have a FANTASTIC warm dry weekend ahead and quiet weather for the end of next week. Go enjoy!

 

 

Figure1u_11052021
Figure 1 update: the 10 day graphical forecast for Longmont from weatherunderground.com

End Friday update.

Forecast Discussion:

As I type, snow is falling outside on the fairly warm ground (the near 100% chance of precipitation on the left edge of Figure 1). Cold air is flowing down onto the Great Plains (Figure 2) but is too shallow to make it far up into the mountains. Western Colorado is still warm. This cool air is flowing upslope with occasional short waves and "jet maxes" or faster bits of the jet stream kicking of enhanced shower action (Figure 3). It is a nice taste of late fall/early winter.

Figure1_11012021
Figure 1: the 10 day graphical forecast from weatherunderground for Longmont
Figure2_11012021
Figure 2: the national surface temperature departure from normal for Tuesday from the GFS.
Figure3_11012021
Figure 3: the surface map from the NWS fore Tuesday.

The Longer-Range Forecast:

Most of the precipitation that will fall over the next five days (total precipitation Figure 4, total snow Figure 5) will occur Monday and Tuesday before the cold air slides off to the southeast. Next weekend looks very pleasant, at this time.

Figure4_11012021
Figure 4: the 5-day precipitation total map from weather5280.com from the GFS
Figure5_11012021
Figure 5: the 5-day (10:1 ratio) snow total map from weather5280.com from the GFS

 


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

Mostly sunny

Mostly sunny

36°F

UV Index
1 Low
Pressure
30.2 Rising
Visibility
6 miles
Dewpoint
22 °F
Humidity
56%
Wind
SE 3.2 mph
Gust
6.5 mph
Wind Chill
34 °F

Hourly Forecast

Today
4 PM
38°F
Sunny
Today
5 PM
36°F
Mostly clear
Today
6 PM
32°F
Mostly clear
Today
7 PM
29°F
Mostly clear
Today
8 PM
25°F
Mostly clear
Today
9 PM
22°F
Clear
Today
10 PM
20°F
Clear
Today
11 PM
19°F
Clear
Tomorrow
12 AM
18°F
Clear
Tomorrow
1 AM
17°F
Clear
Tomorrow
2 AM
16°F
Mostly clear
Tomorrow
3 AM
15°F
Mostly clear

7 Day Forecast

Sunny

Thursday

38 °F

Plenty of sunshine, but cold


Mostly clear

Thursday Night

12 °F

Mainly clear


Partly sunny

Friday

43 °F

Partly sunny


Mostly clear

Friday Night

20 °F

Mainly clear


Mostly sunny

Saturday

45 °F

Sunshine and a few clouds


Partly cloudy

Saturday Night

19 °F

Partly cloudy


Sunny

Sunday

46 °F

Plenty of sunshine


Clear

Sunday Night

19 °F

Clear


Sunny

Monday

51 °F

Sunshine


Clear

Monday Night

22 °F

Clear


Sunrise and Sunset

Sunrise
7:01 AM
Sunset
4:36 PM

Based on AccuWeather data