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The Front Range Forecast: Afternoon storms some severe

In Brief:

Afternoon thunderstorms return, some severe. Summer heat next week.

The Forecast Discussion:

Moisture is returning (Figure 3) from the Gulf of Mexico and temperatures rise.  This means afternoon thunderstorms will become the norm again (Figure 1). An approaching trough (Figure 2) Wednesday will allow some of these storms to reach severe levels with damaging straight line winds and large hail being the primary threats (Figure 4).  Thursday will also see severe weather close or along I-25 again. Make sure your weather apps have notifications turned on!

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Figure 1: the 10 day graphical forecast for Longmont from weatherunderground.com
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Figure 2: The 500mb forecast upper air map for Thursday PM from the GFS and tropicaltidbits.com
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Figure 3: The pricipitatable water forecast map for Wednesday AM from the GFS and tropicaltidbits.com
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figure 4: the Day 2 severe weather forecast map from the NWS and the SPC for Wednesday.

The Longer Range Forecast:

A strong ridge builds over the West by the end of the weekend taking us to summer-like temperatures (Figure 1).  Rainfall, over the next 5 days is spotty and largely confined to the eastern half of the state. 

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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

Mostly cloudy

Mostly cloudy

69°F

UV Index
9 Very High
Pressure
29.81 Falling
Visibility
9 miles
Dewpoint
43 °F
Humidity
38%
Wind
SE 4.8 mph
Gust
11.4 mph
Wind Chill
69 °F

Hourly Forecast

Today
1 PM
66°F
Mostly cloudy w/ t-storms
Today
2 PM
63°F
Cloudy
Today
3 PM
61°F
Cloudy
Today
4 PM
59°F
Cloudy
Today
5 PM
58°F
Cloudy
Today
6 PM
55°F
Thunderstorms
Today
7 PM
53°F
Thunderstorms
Today
8 PM
51°F
Cloudy
Today
9 PM
52°F
Cloudy
Today
10 PM
50°F
Cloudy
Today
11 PM
50°F
Thunderstorms
Tomorrow
12 AM
50°F
Cloudy

7 Day Forecast

Mostly cloudy w/ t-storms

Monday

68 °F

Some sun, then turning cloudy, breezy and not as warm with a couple of showers and a thunderstorm


Thunderstorms

Monday Night

48 °F

An evening thundershower in spots; otherwise, overcast


Rain

Tuesday

53 °F

Cooler with periods of rain and a thunderstorm; breezy in the morning


Rain

Tuesday Night

44 °F

Rain


Showers

Wednesday

57 °F

Occasional morning rain and drizzle; otherwise, low clouds and cool


Mostly clear

Wednesday Night

40 °F

Mainly clear


Partly sunny

Thursday

70 °F

Partly sunny and warmer


Clear

Thursday Night

43 °F

Clear


Mostly cloudy

Friday

75 °F

Mostly cloudy


Mostly clear

Friday Night

45 °F

Mainly clear


Sunrise and Sunset

Sunrise
5:55 AM
Sunset
7:59 PM

Based on AccuWeather data