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The Front Range Forecast: A more normal summer

In Brief:

Severe weather on the plains east of I-25, typical summer weather for everyone else.

The Forecast Discussion:

The normal high temperature for I-25 folks is 90F this week (the highest normal high temperature we see in the year). For most of the next 10 days we are close to or a bit below that except for the start of next week (Figure 1). There are low chances of an afternoon storm through Saturday with severe weather just east of I-25 Thursday (Figure 3). That is being kicked off by a ripple traveling through the upper-level flow (Figure 2 - red line over Colorado) and persistent good low-level moisture levels (high dew points).

 

figure1_07132023
Figure 1: the 10 day graphical forecast for Denver from weatherunderground.com
figure2_07132023
Figure 2: the 500mb upper air forecast map for Thursday evening from tropicaltidbits and the GFS.
figure3_07132023
Figure 3: the severe weather outlook for Thursday from the SPC and NOAA.

The Longer Range Forecast:

The upper air pattern evolves into a 'northwest flow' setup over Colorado after that as a ridge forms over the West (Figure 4). We can get surprise afternoon and evening storms with this pattern. The forecast may be tricky this next week. Keep an eye on the skies for storms that may 'come out of nowhere.'

The expected rainfall over the next 5 days is light and confined to the eastern side of the Rockies (Figure 5).  I'm getting concerned about how long we have not had rain in western Colorado.  Hopefully the U.S. monsoon starts up soon and brings rain/storms back to that side of the state.

figure4_07132023
Figure 4: the 500mb upper air forecast map for Sunday noon from tropicaltidbits and the GFS.
figure5_07132023
Figure 5: the 5 day precipitation forecast from 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

Sunny

Sunny

57°F

UV Index
2 Low
Pressure
30.43 Steady
Visibility
7 miles
Dewpoint
32 °F
Humidity
39%
Wind
NNE 1.1 mph
Gust
2.7 mph
Wind Chill
57 °F

Hourly Forecast

Today
11 AM
64°F
Sunny
Today
12 PM
67°F
Mostly sunny
Today
1 PM
69°F
Sunny
Today
2 PM
72°F
Sunny
Today
3 PM
74°F
Sunny
Today
4 PM
76°F
Sunny
Today
5 PM
78°F
Sunny
Today
6 PM
75°F
Mostly sunny
Today
7 PM
70°F
Mostly clear
Today
8 PM
65°F
Mostly clear
Today
9 PM
61°F
Mostly clear
Today
10 PM
58°F
Mostly clear

7 Day Forecast

Sunny

Sunday

78 °F

Sunny and not as warm but pleasant


Mostly clear

Sunday Night

43 °F

Mainly clear


Mostly sunny

Monday

86 °F

Mostly sunny and warmer


Clear

Monday Night

46 °F

Clear


Partly sunny

Tuesday

84 °F

Partly sunny and very warm


Partly cloudy

Tuesday Night

47 °F

Partly cloudy


Mostly sunny

Wednesday

83 °F

Mostly sunny and warm with the temperature approaching the record of 86 set in 1915


Clear

Wednesday Night

46 °F

Clear


Mostly sunny

Thursday

88 °F

Sunny to partly cloudy and very warm with the temperature tying the record from 1926


Mostly clear

Thursday Night

49 °F

Mainly clear


Sunrise and Sunset

Sunrise
7:03 AM
Sunset
6:33 PM

Based on AccuWeather data