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Sun Update: The Front Range Forecast: Good storm chances

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Figure 3: the 5 day precipitation forecast from the GFS and weather5280.com

In Brief:

A healthy chance of afternoon thunderstorms and rain through the next 10 days.

Sunday Update:

My chaperone duties in Washington DC come to an end today.  A full update tomorrow!  Plenty of moisture and daytime heating plust a favorable upper air pattern means we continue with a good chance of showers for most of the week ahead.  Nothing severe on the plate.

Ens Sunday update.

Tuesday update:

The SPC graphic is not yet out today, but we have a Marginal risk of severe weather again today (1 out of 5). The primary risk is hail and high winds again.  Keep an eye on the western sky!

End Tuesday update:

The Forecast Discussion;

The pattern is for moisture and instability to increase a bit each day for the next 10 days (Figure 1). The severe threat moves off to the east a bit (Figure 2), but storms can produce hail and heavy rain and winds for a few minutes at any time (pulse storms - Figure 2).  We are quite warm for a few days, then cool as a trough moves in and increases rain chances a lot by Friday (Figure 1).

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Figure 1: the 10 day graphical forecast for Denver from weatherunderground.com

 

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Figure 2: the Day 2 (Monday) SPC forecast for thunderstorms and severe weather.

The Longer Range Forecast:

Over the next 5 days, we should see about a quater of an ince of precipitation in Longmont or Broomfield, unless a thunderstorm core hits your neighborhood (Figure 3). The increased precipitation chances later in the week may give us 1-2 inches of rain over that period (Figure 4). We are definitely in a wet pattern!

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Figure 3: the 5 day precipitation forecast from the GFS and weather5280.com
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Figure 4: the 10 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

Sunny

Sunny

63°F

UV Index
2 Low
Pressure
30.18 Steady
Visibility
5 miles
Dewpoint
55 °F
Humidity
75%
Wind
NW 1.1 mph
Gust
1.6 mph
Wind Chill
63 °F

Hourly Forecast

Today
8 AM
70°F
Sunny
Today
9 AM
76°F
Sunny
Today
10 AM
82°F
Sunny
Today
11 AM
86°F
Sunny
Today
12 PM
89°F
Mostly sunny
Today
1 PM
91°F
Partly sunny
Today
2 PM
92°F
Partly sunny
Today
3 PM
92°F
Mostly cloudy w/ showers
Today
4 PM
93°F
Mostly cloudy
Today
5 PM
93°F
Mostly cloudy
Today
6 PM
91°F
Cloudy
Today
7 PM
89°F
Cloudy

7 Day Forecast

Partly sunny w/ showers

Sunday

93 °F

Partly sunny with a passing shower this afternoon


Partly cloudy

Sunday Night

62 °F

Partly cloudy


Mostly cloudy w/ t-storms

Monday

94 °F

Some sun, then increasing clouds with a thundershower in spots in the afternoon


Mostly clear

Monday Night

59 °F

Clear to partly cloudy


Intermittent clouds

Tuesday

92 °F

Sun through high clouds


Partly cloudy

Tuesday Night

60 °F

Partly cloudy


Intermittent clouds

Wednesday

72 °F

Times of sun and clouds with a thunderstorm in the afternoon; thunderstorms can bring hail and damaging winds


Mostly cloudy

Wednesday Night

58 °F

An evening thunderstorm; otherwise, mostly cloudy


Mostly cloudy

Thursday

86 °F

Warmer with variable cloudiness; a thunderstorm in spots in the afternoon


Intermittent clouds

Thursday Night

58 °F

Clearing


Sunrise and Sunset

Sunrise
5:42 AM
Sunset
8:30 PM

Based on AccuWeather data