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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

Cloudy

Cloudy

72°F

UV Index
2 Low
Pressure
30.21 Steady
Visibility
6 miles
Dewpoint
47 °F
Humidity
40%
Wind
ENE 4.7 mph
Gust
9.2 mph
Wind Chill
73 °F

Hourly Forecast

Today
3 PM
74°F
Thunderstorms
Today
4 PM
73°F
Mostly cloudy
Today
5 PM
70°F
Intermittent clouds
Today
6 PM
68°F
Mostly cloudy w/ t-storms
Today
7 PM
65°F
Intermittent clouds
Today
8 PM
63°F
Intermittent clouds
Today
9 PM
60°F
Intermittent clouds
Today
10 PM
58°F
Intermittent clouds
Today
11 PM
56°F
Intermittent clouds
Tomorrow
12 AM
55°F
Mostly cloudy w/ t-storms
Tomorrow
1 AM
54°F
Intermittent clouds
Tomorrow
2 AM
54°F
Cloudy

7 Day Forecast

Partly sunny w/ t-storms

Tuesday

78 °F

Not as warm with times of clouds and sun; a thunderstorm or two this afternoon; thunderstorms can bring gusty winds, hail and localized flooding


Mostly cloudy w/ t-storms

Tuesday Night

51 °F

A thunderstorm this evening; otherwise, increasing clouds


Mostly cloudy w/ t-storms

Wednesday

72 °F

Some sun, then turning cloudy with a couple of thundershowers in the afternoon


Partly cloudy w/ t-storms

Wednesday Night

50 °F

A couple of showers and a thunderstorm in the evening; otherwise, clearing


Mostly sunny

Thursday

72 °F

Mostly sunny and pleasant


Clear

Thursday Night

45 °F

Clear


Sunny

Friday

81 °F

Plenty of sunshine


Partly cloudy

Friday Night

47 °F

Partly cloudy


Mostly sunny

Saturday

85 °F

Mostly sunny


Clear

Saturday Night

53 °F

Clear


Sunrise and Sunset

Sunrise
6:42 AM
Sunset
7:08 PM

Based on AccuWeather data