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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

Partly sunny

Partly sunny

94°F

UV Index
6 High
Pressure
30.03 Steady
Visibility
6 miles
Dewpoint
39 °F
Humidity
15%
Wind
WNW 6.5 mph
Gust
14 mph
Wind Chill
94 °F

Hourly Forecast

Today
3 PM
94°F
Cloudy
Today
4 PM
93°F
Cloudy
Today
5 PM
93°F
Cloudy
Today
6 PM
92°F
Cloudy
Today
7 PM
89°F
Mostly cloudy
Today
8 PM
84°F
Partly sunny
Today
9 PM
78°F
Mostly clear
Today
10 PM
73°F
Mostly clear
Today
11 PM
68°F
Mostly clear
Tomorrow
12 AM
66°F
Mostly clear
Tomorrow
1 AM
64°F
Mostly clear
Tomorrow
2 AM
63°F
Mostly clear

7 Day Forecast

Intermittent clouds

Tuesday

94 °F

Very warm with intervals of clouds and sunshine


Partly cloudy

Tuesday Night

61 °F

Partly cloudy


Partly sunny w/ t-storms

Wednesday

81 °F

Times of sun and clouds with a thunderstorm in the afternoon; thunderstorms can bring hail and damaging winds


Partly cloudy w/ t-storms

Wednesday Night

60 °F

An evening thunderstorm; otherwise, partly cloudy


Thunderstorms

Thursday

88 °F

Mostly cloudy with a thunderstorm in spots in the afternoon


Partly cloudy

Thursday Night

58 °F

Partly cloudy


Mostly cloudy

Friday

91 °F

Variable cloudiness


Mostly clear

Friday Night

61 °F

Clear to partly cloudy


Partly sunny

Saturday

88 °F

Partly sunny with a thunderstorm in spots in the afternoon


Clear

Saturday Night

60 °F

Clear


Sunrise and Sunset

Sunrise
5:44 AM
Sunset
8:29 PM

Based on AccuWeather data