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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

40°F

UV Index
0 Low
Pressure
29.97 Steady
Visibility
9 miles
Dewpoint
36 °F
Humidity
86%
Wind
E 2.7 mph
Gust
3.8 mph
Wind Chill
38 °F

Hourly Forecast

Tomorrow
12 AM
42°F
Showers
Tomorrow
1 AM
41°F
Showers
Tomorrow
2 AM
41°F
Intermittent clouds
Tomorrow
3 AM
40°F
Partly cloudy
Tomorrow
4 AM
40°F
Intermittent clouds
Tomorrow
5 AM
39°F
Mostly cloudy
Tomorrow
6 AM
39°F
Cloudy
Tomorrow
7 AM
38°F
Cloudy
Tomorrow
8 AM
36°F
Mostly cloudy
Tomorrow
9 AM
42°F
Mostly cloudy
Tomorrow
10 AM
46°F
Mostly cloudy
Tomorrow
11 AM
49°F
Cloudy

7 Day Forecast

Rain and snow

Sunday

46 °F

Cloudy and cooler; rain and snow showers this morning, then a couple of brief showers late this afternoon


Showers

Sunday Night

36 °F

A few evening showers; otherwise, mostly cloudy


Mostly cloudy

Monday

60 °F

Mostly cloudy


Mostly cloudy

Monday Night

40 °F

Mostly cloudy


Showers

Tuesday

55 °F

Breezy in the morning; mostly cloudy with a couple of showers


Cloudy

Tuesday Night

34 °F

Cloudy


Intermittent clouds

Wednesday

52 °F

Breezy in the morning; otherwise, intervals of clouds and sun


Intermittent clouds

Wednesday Night

31 °F

Increasing clouds


Mostly cloudy

Thursday

44 °F

Some sun, then turning cloudy with a passing shower; chilly


Mostly cloudy

Thursday Night

31 °F

A shower in spots in the evening; otherwise, mostly cloudy


Sunrise and Sunset

Sunrise
6:48 AM
Sunset
7:23 PM

Based on AccuWeather data