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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

Cloudy

Cloudy

25°F

UV Index
0 Low
Pressure
29.88 Rising
Visibility
4 miles
Dewpoint
22 °F
Humidity
91%
Wind
NNE 4.6 mph
Gust
7.3 mph
Wind Chill
19 °F

Hourly Forecast

Today
6 PM
26°F
Cloudy
Today
7 PM
27°F
Cloudy
Today
8 PM
26°F
Cloudy
Today
9 PM
26°F
Flurries
Today
10 PM
25°F
Flurries
Today
11 PM
24°F
Flurries
Tomorrow
12 AM
23°F
Flurries
Tomorrow
1 AM
22°F
Cloudy
Tomorrow
2 AM
21°F
Cloudy
Tomorrow
3 AM
20°F
Flurries
Tomorrow
4 AM
20°F
Flurries
Tomorrow
5 AM
19°F
Flurries

7 Day Forecast

Freezing rain

Saturday

27 °F

Mainly cloudy and colder; watch for slippery spots early


Snow

Saturday Night

17 °F

A little snow at times with little or no accumulation


Mostly cloudy w/ flurries

Sunday

31 °F

A little accumulation of snow early in the morning; otherwise, clouds giving way to some sun and cold


Mostly clear

Sunday Night

16 °F

Clear to partly cloudy


Partly sunny

Monday

39 °F

Partly sunny and not as cold


Mostly cloudy w/ flurries

Monday Night

22 °F

Increasing clouds with a bit of snow late with little or no accumulation


Snow

Tuesday

26 °F

Cloudy with occasional snow and flurries, mainly early; colder


Partly cloudy

Tuesday Night

3 °F

Partly cloudy and colder


Sunny

Wednesday

36 °F

Not as cold with plenty of sunshine


Mostly clear

Wednesday Night

14 °F

Mainly clear


Sunrise and Sunset

Sunrise
7:23 AM
Sunset
4:48 PM

Based on AccuWeather data