Skip to content
Join our Newsletter

Tuesday Update: Longmont Weather Forecast: Seasonable, but dry weather - Snow??

In Brief:

Seasonable cool weather with little rain for the next week. But rain/snow next Tuesday/Wednesday??

Tuesday update:

The short term forecast, seasonably warm and dry conditions, is on track.  BUT I thought I'd give everyone a heads up that the GFS model is creating a snow storm for the mountains and nearby Plains for Tuesday/Wednesday next week (Figure 1 update).  This certainly might vanish from the forecast, but it has held strong for 3 days now in the model runs.  More later!!

Figure1u_10052021
Figure 1 update: the 10 day 10:1 snowfall ratio forecast from the GFS and weather5280.com

End Tuesday update.

Forecast Discussion:

Very seasonably cool/mild weather is the story for the next 10 days (Figure 1). We have northwest winds across the state with very little moisture around (Figure 2). Enjoy a walk in this example of wonderfulness.

Figure1_10022021
Figure 1: the 10 day graphical forecast from weatherunderground.com for Longmont, CO.
Figure2_10022021
Figure 2: the 500mb upper air forecast map for Monday noon from the GFS and tropicaltidbits.com

 

The Longer Range Forecast:

A ridge builds over the state by the start of the week, warming us to the lower 80's (Figure 3). This is only a bit above normal for this time of year. Our next (small) chance of rain arrives Wednesday with a shortwave (Figure 4 and Figure 1).  It doesn't look like a lot of moisture will fall on the plains, at present. The GFS gives only the southwestern slopes of Colorado a bit of rain over the next 5 days (Figure 5) and only the western slopes (mainly) over the next 10 days (Figure 6),

 

Figure3_10022021
Figure 3: the 500mb upper air forecast map for Wednesday noon from the GFS and tropicaltidbits.com
Figure4_10022021
Figure 4: the 500mb upper air forecast map for Sunday noon from the GFS and tropicaltidbits.com
Figure5_10022021
Figure 5: the 5 day precipitation total from the GFS and weather5280.com
Figure6_10022021
Figure 6: the 10 day precipitation total 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

Sunny

Sunny

45°F

UV Index
1 Low
Pressure
29.88 Steady
Visibility
9 miles
Dewpoint
30 °F
Humidity
57%
Wind
NW 2.7 mph
Gust
5.6 mph
Wind Chill
44 °F

Hourly Forecast

Today
7 AM
46°F
Partly sunny
Today
8 AM
51°F
Partly sunny
Today
9 AM
57°F
Partly sunny
Today
10 AM
61°F
Partly sunny
Today
11 AM
64°F
Partly sunny
Today
12 PM
67°F
Partly sunny
Today
1 PM
69°F
Partly sunny
Today
2 PM
70°F
Intermittent clouds
Today
3 PM
71°F
Intermittent clouds
Today
4 PM
72°F
Intermittent clouds
Today
5 PM
71°F
Intermittent clouds
Today
6 PM
69°F
Intermittent clouds

7 Day Forecast

Intermittent clouds

Friday

72 °F

Beautiful with times of clouds and sun


Mostly cloudy

Friday Night

45 °F

Mostly cloudy


Mostly cloudy

Saturday

71 °F

Mostly cloudy


Mostly clear

Saturday Night

44 °F

Mainly clear


Mostly cloudy

Sunday

65 °F

Turning cloudy; breezy in the afternoon


Cloudy

Sunday Night

47 °F

A thunderstorm on the prowl in the evening; otherwise, cloudy


Intermittent clouds

Monday

65 °F

Times of clouds and sun with a thunderstorm in one or two spots in the afternoon


Cloudy

Monday Night

44 °F

Cloudy


Intermittent clouds

Tuesday

66 °F

Times of sun and clouds


Clear

Tuesday Night

39 °F

Clear


Sunrise and Sunset

Sunrise
5:44 AM
Sunset
8:10 PM

Based on AccuWeather data