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Wed Update: Front Range Forecast: Warmth now, snow weekend?

In Brief:

Warm now, possible weekend first snow.

Wednesday update:

The earlier mentioned Thursday-ish snow storm will be restricted to the northern mountains. Our (probably real this time) first chance of snow is forecast to arrive Saturday (Figure 1 update). I'm on vacation this week, but will be watching this closely! 

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Figure 1 update: the 6 hour precipitation and surface pressure forecast map from the GFS for Saturday noon from tropicaltidbits.com

End Wednesday update.

The Forecast Discussion:

We still have a few days of warmth and dry air.  We set a new hight temperature record for Friday at DIA! The near 80's continue through Monday (Figure 1).

figure1_10202023
Figure 1: the 10 day graphical forecast for Longmont from weatherunderground.com

The Longer Range Forecast:

The graphical forecast does not show significant rain or snow (Figure 1), but the GFS is hinting at a good storm late week.  A trough crosses the state Thursday/Friday (Figure 2). It gives us a good (first) snow storm (Figure 3).  That gives Longmont about 1-2 inches of snow (Figure 4).  Overall, the GFS givves most of us about 1/2 inch of water or less (Figure 5).  Keep praying for more moisture!

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Figure 2: the 500mb upper air forecast map for early Friday AM from the GFS and tropicaltidbits.com
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Figure 3: the 6 hour precipitation type for early Friday morning from the GFS.
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Figure 4: the 10 day 10:1 snowfall forecast from the GFS and weather5280.com
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Figure 5: 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

Mostly clear

Mostly clear

69°F

UV Index
0 Low
Pressure
30.14 Rising
Visibility
8 miles
Dewpoint
59 °F
Humidity
71%
Wind
NW 1.7 mph
Gust
2.9 mph
Wind Chill
69 °F

Hourly Forecast

Tomorrow
12 AM
67°F
Mostly cloudy w/ showers
Tomorrow
1 AM
65°F
Partly cloudy
Tomorrow
2 AM
64°F
Mostly clear
Tomorrow
3 AM
62°F
Clear
Tomorrow
4 AM
61°F
Clear
Tomorrow
5 AM
60°F
Clear
Tomorrow
6 AM
58°F
Sunny
Tomorrow
7 AM
62°F
Sunny
Tomorrow
8 AM
68°F
Mostly sunny
Tomorrow
9 AM
74°F
Mostly sunny
Tomorrow
10 AM
80°F
Mostly sunny
Tomorrow
11 AM
84°F
Mostly sunny

7 Day Forecast

Intermittent clouds

Saturday

82 °F

Clouds giving way to sun; high levels of ozone will lead to poor air quality


Mostly clear

Saturday Night

58 °F

A shower in spots late this evening; otherwise, clear to partly cloudy


Partly sunny w/ showers

Sunday

94 °F

Partly sunny with a passing shower in the afternoon


Partly cloudy

Sunday Night

61 °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

60 °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

81 °F

Not as warm with times of clouds and sun; a thunderstorm in spots in the afternoon


Intermittent clouds

Wednesday Night

58 °F

An evening thunderstorm; otherwise, partly cloudy


Sunrise and Sunset

Sunrise
5:41 AM
Sunset
8:30 PM

Based on AccuWeather data