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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.
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Current Weather

Cloudy

Cloudy

79°F

UV Index
2 Low
Pressure
30.1 Falling
Visibility
9 miles
Dewpoint
47 °F
Humidity
33%
Wind
NNE 2.4 mph
Gust
4.6 mph
Wind Chill
79 °F

Hourly Forecast

Today
2 PM
80°F
Thunderstorms
Today
3 PM
80°F
Cloudy
Today
4 PM
78°F
Cloudy
Today
5 PM
75°F
Thunderstorms
Today
6 PM
73°F
Cloudy
Today
7 PM
71°F
Cloudy
Today
8 PM
69°F
Intermittent clouds
Today
9 PM
67°F
Intermittent clouds
Today
10 PM
64°F
Intermittent clouds
Today
11 PM
62°F
Mostly cloudy w/ t-storms
Tomorrow
12 AM
61°F
Intermittent clouds
Tomorrow
1 AM
60°F
Intermittent clouds

7 Day Forecast

Thunderstorms

Friday

80 °F

Mostly cloudy and not as warm; a couple of brief showers late this morning followed by a thunderstorm in parts of the area this afternoon


Partly cloudy w/ t-storms

Friday Night

57 °F

A thunderstorm in spots this evening; otherwise, partly cloudy


Thunderstorms

Saturday

78 °F

Mostly cloudy with a thunderstorm in parts of the area in the afternoon


Mostly cloudy

Saturday Night

52 °F

Rather cloudy


Partly sunny

Sunday

76 °F

A shower in the area in the morning; otherwise, partly sunny


Clear

Sunday Night

49 °F

Clear


Partly sunny

Monday

84 °F

Partly sunny and warmer


Partly cloudy

Monday Night

51 °F

Partly cloudy


Intermittent clouds

Tuesday

74 °F

Pleasant with times of clouds and sun


Clear

Tuesday Night

48 °F

Clear


Sunrise and Sunset

Sunrise
6:38 AM
Sunset
7:14 PM

Based on AccuWeather data