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The Front Range Forecast: Still Continued Calm + Heat

In Brief:

Quiet late summer weather this week with very warm temperatures.

Tuesday Update:

Other than a tiny return of moisture in early October, we remain dry and warm for the next 10 days (Figure 2 update). Record high temperatures for the end of the month range from 90F to 92F.  We will be close but probably not set record highs in many locations.  Hope for a bigger cool down and return of rain starting October 3rd.

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Figure 2 update: the 10 day graphical forecast for Longmont from weatherunderground.com

End Tuesday update.

Thursday Update:

The next ten days will see a remarkable lack of temperature variation (about 5-10 degrees above normal) and virtually no chance of rain.  There is nothing to see here. What you saw today, you will get all week. 

figure1u_09212021
Figure 1 update: the 10 day graphical forecast for Denver from weatherunderground.com

End Thursday update.

The Forecast Discussion:

A slow cool down begins this week (Figure 1). The normal high temperatures drop from 78F to 74F over the next 10 days. We start out above normal, but drop to normal by next weekend.  That warmth is due to the big western U.S. ridge in place at the start of the forecast period (Figure 2). Rain chances remain very low all week.  There is just a chance of an afternoon storm now and then.  This is a great week to get a roof replacement (we are scheduled for this week).

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Figure 1: the 10 day graphical forecast for Denver from weatherunderground.com
figure2_09172023
Figure 2: the 500mb upper air forecast map for Sunday noon from the GFS and Tropicaltidbits.com

The Longer Range Forecast:

Over the next 5 (Figure 3) and 10 (Figure 4) days, rain totals are very low and spotty state wide.  Nothing much to discuss here! Fall is coming!

 

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Figure 3: the 5 day precipitation forecast from the GFS and weather5280.com
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Figure 4: the 10 day precipitation 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
30.25 Falling
Visibility
8 miles
Dewpoint
47 °F
Humidity
74%
Wind
SW 1.1 mph
Gust
2.7 mph
Wind Chill
55 °F

Hourly Forecast

Today
2 AM
50°F
Mostly clear
Today
3 AM
49°F
Mostly clear
Today
4 AM
48°F
Mostly clear
Today
5 AM
48°F
Mostly clear
Today
6 AM
47°F
Mostly clear
Today
7 AM
49°F
Mostly sunny
Today
8 AM
53°F
Mostly sunny
Today
9 AM
57°F
Mostly sunny
Today
10 AM
61°F
Mostly sunny
Today
11 AM
65°F
Mostly sunny
Today
12 PM
68°F
Mostly sunny
Today
1 PM
71°F
Mostly sunny

7 Day Forecast

Mostly cloudy w/ t-storms

Wednesday

68 °F

Turning cloudy with thundershowers this afternoon


Partly cloudy

Wednesday Night

47 °F

Clearing


Mostly sunny

Thursday

77 °F

Mostly sunny and pleasant


Clear

Thursday Night

45 °F

Clear


Sunny

Friday

84 °F

Plenty of sunshine


Mostly cloudy

Friday Night

50 °F

Increasing clouds


Partly sunny

Saturday

83 °F

Partly sunny


Mostly clear

Saturday Night

53 °F

Clear to partly cloudy


Partly sunny

Sunday

86 °F

Partial sunshine


Mostly clear

Sunday Night

50 °F

Mainly clear


Sunrise and Sunset

Sunrise
6:43 AM
Sunset
7:06 PM

Based on AccuWeather data