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Tuesday Update: Longmont Weather Forecast: Mild and dry for another week...

Figure5_11272021
Figure 5: the 10 day (10:1 ratio) total snowfall forecast from the GFS and weather5280.com

In Brief:

Abnormally warm weather and abnormally dry weather continues.

Tuesday update:

Things continue abnormally dry and fantastically warm (it would be in the 120'sF if this were the peak of summer). There IS a hint of a snowstorm arriving Tuesday to set our new latest snowall and longest snow-free period at DIA.  More later!

End Tuesday Update.

Forecast Discussion:

Sorry, we still don't have rain or snow coming for the I-25 corridor. Temperatures will remain about 20 to 25 degrees above normal (Figure 1).  No significant precipitation is expected over the next 7 days (Figure 1).  This is due to a persistent western U.S. ridge (blue line in Figure 2).

Figure1_11272021
Figure 1: the 10 day graphical forecast from weatherunderground.com for Longmont, CO.
Figure2_11272021
Figure 2: the 500mb upper air forecast map for Sunday noon from the GFS and tropicaltidbits.com

The Long Range Forecast:

The ridge is still somewhat dominant even a week out (Figure 3). The western slopes should get some precipitation (Figure 4) and snow (Figure 5). Not much is expected along I-25 for the next 10 days. 

Figure3_11272021
Figure 3: Figure 1: the 500mb upper air forecast map for Friday noon from the GFS and tropicaltidbits.com
Figure4_11272021
Figure 4: the 10 day precipitation total from the GFS and weather5280.com
Figure5_11272021
Figure 5: the 10 day (10:1 ratio) total snowfall forecast 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

54°F

UV Index
0 Low
Pressure
30.03 Steady
Visibility
7 miles
Dewpoint
51 °F
Humidity
92%
Wind
NW 1.6 mph
Gust
3.2 mph
Wind Chill
54 °F

Hourly Forecast

Today
4 AM
55°F
Showers
Today
5 AM
55°F
Rain
Today
6 AM
55°F
Rain
Today
7 AM
55°F
Rain
Today
8 AM
56°F
Partly sunny w/ showers
Today
9 AM
58°F
Partly sunny
Today
10 AM
61°F
Partly sunny
Today
11 AM
64°F
Partly sunny
Today
12 PM
66°F
Partly sunny
Today
1 PM
69°F
Partly sunny
Today
2 PM
72°F
Partly sunny
Today
3 PM
73°F
Partly sunny

7 Day Forecast

Thunderstorms

Saturday

75 °F

Mostly cloudy with a thunderstorm in spots in the afternoon; thunderstorms can bring hail and damaging winds


Rain

Saturday Night

53 °F

Mostly cloudy; a shower in spots late in the evening followed by rain and drizzle late


Partly sunny

Sunday

75 °F

A morning shower in spots; otherwise, sun and some clouds


Clear

Sunday Night

50 °F

Clear


Partly sunny

Monday

86 °F

Partly sunny and warmer


Partly cloudy

Monday Night

52 °F

Partly cloudy


Intermittent clouds

Tuesday

72 °F

Pleasant with times of clouds and sun


Mostly cloudy w/ t-storms

Tuesday Night

50 °F

Cloudy in the evening with a couple of showers and a thunderstorm, then partly cloudy late


Mostly cloudy w/ t-storms

Wednesday

71 °F

Some sun, then turning cloudy with a couple of showers and a thunderstorm


Clear

Wednesday Night

47 °F

Clear


Sunrise and Sunset

Sunrise
6:39 AM
Sunset
7:13 PM

Based on AccuWeather data