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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – October 20th, 2018

This content was originally published by the Longmont Observer and is licensed under a Creative Commons license.

The Forecast Discussion:

There really isn't much to report - this is a VERY NICE stretch of weather. The temperature departures from normal (Figure 1) today are just a little above or a little below normal depending on where you are. For Sunday, things are a touch warmer, but not extreme (Figure 2) - maybe about 72°F. We have a ridge over the west, so it is dry.

More below in the extended forecast...

Note: I'll be on a big family vacation at the end of the month. There will be no updates to this column for the period October 26-Nov 4. I'll probably create a page of links to my favorite forecast pages in my absence.

Figure 1: forecast surface temperature anomaly for Colorado (departure from normal) for Saturday noon from weather5280.com

Figure 2: forecast surface temperature anomaly for Colorado (departure from normal) for Sunday noon from weather5280.com

The longer range forecast:

We do get a complex split flow with a couple short wave troughs traveling under the big ridge by mid-week next week (Figure 3). There isn't much moisture around, or instability expected with this set-up, so rain chances (Figure 4- green circle) remain low. We just cool to below normal as the short waves travel through (normal is about 65°F this week).

Enjoy the extreme niceness.

Figure 3: The 500mb forecast upper air analysis for Wednesday AM. Pink dot is Longmont. Red lines are troughs, blue lines are ridges.

Figure 4: the next 10 days of the graphical forecast for Longmont, CO from weatherunderground.com

Current Weather

Partly sunny

Partly sunny

50°F

UV Index
2 Low
Pressure
29.47 Rising
Visibility
8 miles
Dewpoint
20 °F
Humidity
31%
Wind
W 10.3 mph
Gust
26.5 mph
Wind Chill
46 °F

Hourly Forecast

Today
8 AM
49°F
Showers
Today
9 AM
51°F
Cloudy
Today
10 AM
53°F
Cloudy
Today
11 AM
54°F
Cloudy
Today
12 PM
55°F
Cloudy
Today
1 PM
55°F
Cloudy
Today
2 PM
55°F
Cloudy
Today
3 PM
55°F
Cloudy
Today
4 PM
55°F
Cloudy
Today
5 PM
54°F
Cloudy
Today
6 PM
54°F
Cloudy
Today
7 PM
53°F
Cloudy

7 Day Forecast

Windy

Monday

55 °F

Winds gusting past 40 mph; a shower in spots this morning; otherwise, cloudy and cooler


Windy

Monday Night

42 °F

Very windy this evening; partly cloudy


Partly sunny w/ showers

Tuesday

59 °F

A couple of showers in the morning; otherwise, windy and cool with times of clouds and sun


Partly cloudy

Tuesday Night

32 °F

Partly cloudy


Intermittent clouds

Wednesday

60 °F

Times of clouds and sun


Intermittent clouds

Wednesday Night

38 °F

Partly cloudy


Intermittent clouds

Thursday

56 °F

Cool with times of clouds and sun


Cloudy

Thursday Night

39 °F

Cloudy


Intermittent clouds

Friday

62 °F

Times of sun and clouds


Mostly clear

Friday Night

40 °F

Mainly clear


Sunrise and Sunset

Sunrise
5:53 AM
Sunset
8:01 PM

Based on AccuWeather data