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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – December 7, 2017

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

Forecast Discussion:

I'll mainly work with the scattered snow showers today.  We will have two periods of instability/lift over the state, one in the morning and another in the afternoon. With reinforced cold air, we'll be cold enough for snow. Even if it is only snow flurries in the air.  The favorable mountain slopes may see up to 4" of snow, but nothing measurable should build up on the Plains or along I-25.  It will be cold and blustery though, with less sun than we saw on Wednesday.

Figure 1 shows that there will be scattered showers all across the northern mountains and NE plains.  Anyone around might see a few periods of light snow.

Figure 2 is the GFS take. The gap along I-25 seems to be the snow-depressing effect of down-slope flow, but snow flurries are still possible in Longmont.  Figure 3 hints that a coating is possible IF everything went right for snow for us.

Figure 1: GFS run from tropicaltidbits.com snowfall accumulation between Wed PM and Thur PM.

Figure 2: GFS run from weather5280.com snowfall accumulation between Wed PM and Fri AM.

Figure 3: WPC 50 percentile run from weather5280.com snowfall accumulation between Wed PM and Fri AM.

The Longer Range Forecast:

The ridge will build in from the west - which will give California a break from the destructive Santa Ana winds, and will warm us nicely for a beautiful weekend.  More on that later!

Current Weather

Mostly cloudy

Mostly cloudy

55°F

UV Index
8 Very High
Pressure
30.12 Falling
Visibility
8 miles
Dewpoint
31 °F
Humidity
40%
Wind
SE 3.7 mph
Gust
8.4 mph
Wind Chill
55 °F

Hourly Forecast

Today
1 PM
58°F
Intermittent clouds
Today
2 PM
61°F
Partly sunny
Today
3 PM
63°F
Partly sunny
Today
4 PM
65°F
Intermittent clouds
Today
5 PM
66°F
Intermittent clouds
Today
6 PM
65°F
Intermittent clouds
Today
7 PM
63°F
Intermittent clouds
Today
8 PM
60°F
Mostly clear
Today
9 PM
57°F
Mostly clear
Today
10 PM
55°F
Mostly clear
Today
11 PM
52°F
Mostly clear
Tomorrow
12 AM
50°F
Mostly clear

7 Day Forecast

Intermittent clouds

Saturday

66 °F

Not as warm with intervals of clouds and sunshine


Mostly clear

Saturday Night

39 °F

Clear to partly cloudy


Mostly cloudy

Sunday

77 °F

Mostly cloudy and warmer; breezy in the afternoon


Mostly cloudy

Sunday Night

45 °F

Rather cloudy; breezy late


Windy

Monday

60 °F

Very windy; cloudy and cooler


Intermittent clouds

Monday Night

43 °F

Partly cloudy


Intermittent clouds

Tuesday

62 °F

Times of clouds and sun; windy in the afternoon


Partly cloudy

Tuesday Night

36 °F

Partly cloudy


Intermittent clouds

Wednesday

60 °F

Times of clouds and sun


Intermittent clouds

Wednesday Night

35 °F

Partly cloudy


Sunrise and Sunset

Sunrise
5:55 AM
Sunset
7:59 PM

Based on AccuWeather data