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Mon Update: The Front Range Forecast: More warmth, little rain

In Brief:

Near record heat and little chance of rain.

Monday Update:

The great western ridge moves in again bringing back late season 80's for highs.  The normal high temperature is only 65F now - this is really warm. Records for these dates are still a bit warmer, in the mid to upper 80's. We see a hint of cool weather and showers about 9 days from now, but that can certainly change.

Stay tuned!

figure2_10162023
Figure 2 update: the 10 day graphical forecast for Longmont from weatherunderground.com

End Monday update.

 

Special Note:  

This Saturday morning, we'll have a partial eclipse of the sun peaking around 10:30am.  This eclipse will, at no moment, be safe to look at in ANY WAY except by certified eclipse glasses (undamaged and new) or a telescope with appropriate front end solar filtering.

I will be opening the Cherrywood Observatory for people to come look.  Please do not bring any viewing aids (like binoculars) or welder goggles.  To find my address and details, search for the Cherrywood Observatory eclipse on Nextdoor.  I hope to see you there.

Thur Update:

The low and storm are pulling away.  I received about 0.16 in of water yesterday and a trace or more today. The first freezing temperatures are headed in overnight tonight.  There is a freeze watch for I-25 cities and the eastern plains.  Cover those plants or bring them inside!

figure1u_10122023
Figure 1 update: freeze watch map from the NWS.

End Thur update.

The Forecast Discussion:

The ridge holds on for a couple more days. We'll see above normal temperatures into Wednesday morning (Figure 1). Afternoons get a bit breezier each day.

figure1_10082023
Figure 1: the 10 day graphical forecast for Longmont from weatherunderground.com

The Longer Range Forecast:

A healthy cut-off low rolls over Colorado Wednesday afternoon and Thursday. (Figure 2). At present, northern Colorado will see the precipitation, rain on the low lands, snow in the northern mountains (Figure 3). Rainfall amounts do look pretty light, though (Figure 4).

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Figure 2: the 500mb upper air forecast map for Thursday noon from the GFS and tropicaltidbits.com
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Figure 3: the surface 6 hour precipitation forecast map for Thursday noon from the GFS and tropicaltidbits.com
figure4_10082023
Figure 4: the 5 day precipitation total 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
0 Low
Pressure
30.24 Steady
Visibility
10 miles
Dewpoint
6 °F
Humidity
39%
Wind
SSW 4.2 mph
Gust
8.7 mph
Wind Chill
23 °F

Hourly Forecast

Today
7 PM
26°F
Partly cloudy
Today
8 PM
22°F
Partly cloudy
Today
9 PM
19°F
Intermittent clouds
Today
10 PM
19°F
Intermittent clouds
Today
11 PM
19°F
Intermittent clouds
Tomorrow
12 AM
18°F
Intermittent clouds
Tomorrow
1 AM
20°F
Mostly clear
Tomorrow
2 AM
20°F
Mostly clear
Tomorrow
3 AM
20°F
Mostly clear
Tomorrow
4 AM
20°F
Mostly clear
Tomorrow
5 AM
20°F
Mostly clear
Tomorrow
6 AM
20°F
Mostly clear

7 Day Forecast

Mostly sunny

Thursday

34 °F

Cold with sunshine and a few clouds


Partly cloudy

Thursday Night

18 °F

Partly cloudy


Intermittent clouds

Friday

41 °F

Intervals of clouds and sunshine


Snow

Friday Night

17 °F

Overcast with snow and flurries at times late, accumulating a coating to an inch


Snow

Saturday

23 °F

Colder with snow and flurries at times, accumulating an inch or two; untreated surfaces will be slippery


Flurries

Saturday Night

9 °F

Overcast with a little snow, accumulating a coating to an inch; storm total snowfall 1-3 inches


Intermittent clouds

Sunday

28 °F

Cold; low clouds in the morning followed by clouds giving way to some sun in the afternoon


Clear

Sunday Night

8 °F

Clear


Sunny

Monday

41 °F

Not as cold with plenty of sunshine


Clear

Monday Night

13 °F

Clear


Sunrise and Sunset

Sunrise
7:17 AM
Sunset
5:08 PM

Based on AccuWeather data