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Tuesday update: The Front Range Forecast: Severe still!

In Brief:

Severe weather again today then dry. 

Tuesday update:

Amazingly, the afternoon severe weather chances continue now into the second week of August (Figure 2 update). The risk near I-25 and in the mountains is for hail and high winds.  Just a bit east of I-25, there is a chance of an isolated tornado or two. As always, keep an eye out to the western/northwestern sky this afternoon. It looks like we get a break Wednesday!

 

figure2u_08082023
Figure 2 update: the Day 1, Tuesday SPC severe weather forecast.

End Tuesday update.

Sunday update:

High surface moisture levels and favorable wind directions and speeds throughout the atmosphere over Colorado means, yes, more hail in the stronger late afternoon and evening storms today (Figure 1 update). The Storm Prediction Center also noted that they may need to up the hail chances from Marginal (1 out of 5 risk) to Slight (2 out of 5) as more data comes in today,

figure1_08062023
Figure 1 update: the hail forecast map from the SPC and NOAA for Sunday.

End Sunday update.

Forecast Discussion:

A cool front has arrived and is bringing a surge of moisture back to the I-25 communities. With a short wave expected to arrive this afternoon, we should see a spike in thunderstorm activity again (Figure 1). There is a marginal risk (1 out of 5) of severe weather north of Longmont, a slight risk (2 out of 5) south and east of Longmont, and an enhanced risk (3 out of 5) southeast of Denver and east of Colorado Springs (Figure 2).

The enhanced risk region has a chance of tornadoes (Figure 3) while the marginal and slight regions have a chance for damaging hail and high winds (Figure 4). The severe chances keep rolling!

We will see pretty cool weather Sunday and remain below normal through mid-week (Figure 1).

figure1_08052023
Figure 1: the 10 day graphical forecast for Denver from weatherunderground.com
figure2_08052023
Figure 2: the SPC severe weather outlook for Saturday (Day 1).
figure3_08052023
Figure 3: the SPC tornado outlook for Saturday (Day 1).
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Figure 4: the SPC hail outlook for Saturday (Day 1).

The Longer Range Forecast:

The end of the week sees normal high temperatures return (Figure 1) with rain, over the next 5 days, falling largely in the mountains and eastern plains.

figure5_08052023
Figure 5: the 5 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

41°F

UV Index
1 Low
Pressure
29.74 Steady
Visibility
8 miles
Dewpoint
34 °F
Humidity
77%
Wind
N 1.7 mph
Gust
3.9 mph
Wind Chill
41 °F

Hourly Forecast

Today
4 PM
44°F
Cloudy
Today
5 PM
42°F
Mostly clear
Today
6 PM
39°F
Mostly clear
Today
7 PM
40°F
Cloudy
Today
8 PM
39°F
Cloudy
Today
9 PM
37°F
Cloudy
Today
10 PM
36°F
Cloudy
Today
11 PM
35°F
Cloudy
Tomorrow
12 AM
34°F
Cloudy
Tomorrow
1 AM
33°F
Partly cloudy
Tomorrow
2 AM
33°F
Partly cloudy
Tomorrow
3 AM
32°F
Partly cloudy

7 Day Forecast

Partly sunny w/ showers

Thursday

44 °F

Partly sunny


Mostly cloudy

Thursday Night

30 °F

Clouds breaking


Cloudy

Friday

48 °F

Cloudy


Mostly cloudy

Friday Night

30 °F

Mostly cloudy


Mostly cloudy

Saturday

52 °F

Some sun, then turning cloudy


Cloudy

Saturday Night

34 °F

Cloudy


Partly sunny

Sunday

61 °F

Partly sunny and milder


Showers

Sunday Night

42 °F

Mostly cloudy with a passing shower or two


Mostly cloudy

Monday

50 °F

Cooler with some sun, then turning cloudy


Intermittent clouds

Monday Night

21 °F

Partly cloudy and colder


Sunrise and Sunset

Sunrise
7:22 AM
Sunset
4:41 PM

Based on AccuWeather data