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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – October 17th, 2018

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

Forecast Discussion:

Figure 1 shows high pressure to the north and clear (mostly clear) skies over the state today. That interesting low in the southwest has inched up to near the four corners and is pumping some rain into AZ and serious water into flooded Texas. The upper air pattern (Figure 2) shows that cutoff low rolling over Arizona and that right-side uplift/storminess region over Texas and New Mexico. This is still predicted to stay to our south.

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.

Figure 1: The forecast surface map for Wednesday p.m. From NCEP.

Figure 2: The 500mb forecast upper air analysis for Wednesday p.m.. Pink dot is Longmont. Red lines are troughs, blue lines are ridges.

The longer range forecast:

Looking off into the distance, temperatures bob up and down around 60°F (Figure 3). Our snow melts and nothing new falls, but things don't get hot either. Nighttime temperatures stay above freezing. You still have time to drain/blow-out the sprinklers if you haven't yet.

Figure 3: the next 10 days of the graphical forecast for Longmont, CO from weatherunderground.com

Current Weather

Partly cloudy

Partly cloudy

49°F

UV Index
0 Low
Pressure
29.99 Steady
Visibility
8 miles
Dewpoint
32 °F
Humidity
52%
Wind
S 1.7 mph
Gust
3.4 mph
Wind Chill
49 °F

Hourly Forecast

Today
1 AM
44°F
Cloudy
Today
2 AM
42°F
Cloudy
Today
3 AM
41°F
Cloudy
Today
4 AM
39°F
Mostly cloudy
Today
5 AM
38°F
Intermittent clouds
Today
6 AM
36°F
Partly sunny
Today
7 AM
35°F
Partly sunny
Today
8 AM
41°F
Partly sunny
Today
9 AM
49°F
Partly sunny
Today
10 AM
58°F
Partly sunny
Today
11 AM
62°F
Partly sunny
Today
12 PM
65°F
Partly sunny

7 Day Forecast

Mostly cloudy

Thursday

65 °F

Becoming cloudy


Mostly cloudy

Thursday Night

35 °F

Mostly cloudy


Partly sunny

Friday

71 °F

Pleasant with partial sunshine


Partly cloudy

Friday Night

38 °F

Partly cloudy


Partly sunny

Saturday

66 °F

Partial sunshine


Mostly clear

Saturday Night

41 °F

Clear to partly cloudy


Mostly cloudy

Sunday

76 °F

Rather cloudy; breezy in the afternoon


Intermittent clouds

Sunday Night

46 °F

Partly cloudy


Cloudy

Monday

60 °F

Cloudy and cooler with a shower in spots; windy in the afternoon


Mostly cloudy

Monday Night

41 °F

Breezy in the evening; otherwise, mostly cloudy


Sunrise and Sunset

Sunrise
5:58 AM
Sunset
7:57 PM

Based on AccuWeather data