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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

63°F

UV Index
0 Low
Pressure
30 Falling
Visibility
6 miles
Dewpoint
59 °F
Humidity
85%
Wind
N 1.1 mph
Gust
2.8 mph
Wind Chill
63 °F

Hourly Forecast

Today
5 AM
62°F
Mostly clear
Today
6 AM
62°F
Mostly sunny
Today
7 AM
65°F
Mostly sunny
Today
8 AM
66°F
Mostly sunny
Today
9 AM
72°F
Mostly sunny
Today
10 AM
78°F
Partly sunny
Today
11 AM
83°F
Partly sunny
Today
12 PM
88°F
Partly sunny
Today
1 PM
90°F
Partly sunny
Today
2 PM
92°F
Partly sunny
Today
3 PM
90°F
Partly sunny
Today
4 PM
85°F
Partly sunny w/ t-storms

7 Day Forecast

Partly sunny w/ t-storms

Saturday

92 °F

Partly sunny with a heavy thunderstorm this afternoon; thunderstorms could bring damaging winds, flash flooding and hail


Partly cloudy w/ t-storms

Saturday Night

59 °F

A thundershower in spots this evening; otherwise, mainly clear


Mostly sunny

Sunday

98 °F

Mostly sunny and very warm


Clear

Sunday Night

56 °F

Clear


Sunny

Monday

100 °F

Hot with the temperature tying the record from 1995 with plenty of sunshine; caution advised if outside for extended periods of time


Clear

Monday Night

58 °F

Clear


Mostly sunny

Tuesday

103 °F

Mostly sunny and hot with the temperature approaching the record of 105 set in 1980; caution advised if outside for extended periods of time


Partly cloudy

Tuesday Night

62 °F

Partly cloudy


Sunny

Wednesday

103 °F

Sunshine and hot with the temperature breaking the record of 102 set in 2001; danger of dehydration and heatstroke if outside for extended periods of time


Clear

Wednesday Night

62 °F

Clear


Sunrise and Sunset

Sunrise
5:54 AM
Sunset
8:19 PM

Based on AccuWeather data