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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

Clear

Clear

28°F

UV Index
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Pressure
30.3 Steady
Visibility
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Dewpoint
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Humidity
60%
Wind
W 2.2 mph
Gust
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Wind Chill
28 °F

Hourly Forecast

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4 PM
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5 PM
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6 PM
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7 Day Forecast

Mostly sunny

Saturday

57 °F

Mostly sunny and mild; quiet weather for early holiday travelers


Partly cloudy

Saturday Night

35 °F

Partly cloudy


Intermittent clouds

Sunday

59 °F

Sun through high clouds and mild


Cloudy

Sunday Night

35 °F

Cloudy


Mostly cloudy

Monday

54 °F

Mostly cloudy and mild


Clear

Monday Night

28 °F

Clear


Mostly cloudy

Tuesday

50 °F

Mainly cloudy


Intermittent clouds

Tuesday Night

29 °F

Partly to mostly cloudy; good weather for Santa


Intermittent clouds

Wednesday

49 °F

Intervals of clouds and sunshine


Intermittent clouds

Wednesday Night

27 °F

Partly cloudy


Sunrise and Sunset

Sunrise
7:20 AM
Sunset
4:38 PM

Based on AccuWeather data