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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

Mostly cloudy

Mostly cloudy

88°F

UV Index
5 Moderate
Pressure
30.1 Falling
Visibility
8 miles
Dewpoint
55 °F
Humidity
32%
Wind
NE 2.3 mph
Gust
5 mph
Wind Chill
88 °F

Hourly Forecast

Today
2 PM
92°F
Mostly cloudy
Today
3 PM
93°F
Mostly cloudy
Today
4 PM
91°F
Mostly cloudy
Today
5 PM
87°F
Mostly cloudy
Today
6 PM
83°F
Thunderstorms
Today
7 PM
80°F
Mostly cloudy
Today
8 PM
77°F
Partly sunny
Today
9 PM
73°F
Partly cloudy
Today
10 PM
71°F
Partly cloudy w/ t-storms
Today
11 PM
68°F
Partly cloudy
Tomorrow
12 AM
67°F
Partly cloudy
Tomorrow
1 AM
66°F
Partly cloudy

7 Day Forecast

Mostly cloudy w/ t-storms

Monday

93 °F

A shower in spots late this morning, then a thunderstorm in spots late this afternoon; thunderstorms can bring hail and damaging winds


Partly cloudy w/ t-storms

Monday Night

60 °F

A thunderstorm in spots this evening; otherwise, clear to partly cloudy; thunderstorms can bring hail and damaging winds


Intermittent clouds

Tuesday

96 °F

Intervals of clouds and sunshine


Partly cloudy

Tuesday Night

61 °F

Partly cloudy


Partly sunny w/ t-storms

Wednesday

82 °F

Clouds and sun with a thunderstorm in the afternoon; thunderstorms can bring hail and damaging winds


Partly cloudy w/ t-storms

Wednesday Night

58 °F

An evening thunderstorm; otherwise, partly cloudy


Mostly cloudy

Thursday

86 °F

Mostly cloudy with a thunderstorm in spots in the afternoon


Partly cloudy

Thursday Night

58 °F

Partly cloudy


Mostly cloudy

Friday

89 °F

Variable cloudiness


Mostly clear

Friday Night

61 °F

Mainly clear


Sunrise and Sunset

Sunrise
5:43 AM
Sunset
8:29 PM

Based on AccuWeather data