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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – December 5, 2018

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

Forecast Discussion:

I'm working on getting the inside decorations up now, so I'll use this quiet weather period to go 'lite' on the posting. Eventually we'll have so much weather I won't be able to fit it all here. Just not this week.

The weather map, minus a weak lee trough (black dashed line in Colorado), is still quiet.  The next system is occluding (purple front) out on the West coast. It next heads past us to the south (Figure 1) over the next 48 hours.

The snowfall over the next 48 hours really really meager across Colorado (Figure 2). We may see a dusting to a coating again tonight through Thursday AM.

Figure 1: The current surface map from Tuesday PM and the Weather Channel.

Figure 2: The forecast accumulated snow map from the GFS and weather5280.com for Colorado, through Thursday afternoon. Longmont is the pink dot, as always.

Forecast Discussion:

We have the current cold front pass mid-afternoon today followed by about 12 hours of elevated light snow chances. This does put us at near freezing for a day and a half. The next warm up continues until a double (dry, it seems) cold front hit comes Tuesday and Wednesday next week (Figure 3).

Even over the next 10 days (Figure 4) Longmont does not expect (from the GFS) to see any more snow than it gets over the next day or so. The mountains will see more snow with the systems next week at least. That is important for long term water supplies and ski resort happiness. Crazy way to run a late-Fall.

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

Figure 4: The forecast accumulated snow map from the GFS and weather5280.com for Colorado, through the next 10 days.

Current Weather

Partly cloudy

Partly cloudy

51°F

UV Index
0 Low
Pressure
29.77 Steady
Visibility
8 miles
Dewpoint
25 °F
Humidity
36%
Wind
SW 3.3 mph
Gust
7.1 mph
Wind Chill
51 °F

Hourly Forecast

Tomorrow
12 AM
45°F
Intermittent clouds
Tomorrow
1 AM
43°F
Intermittent clouds
Tomorrow
2 AM
41°F
Intermittent clouds
Tomorrow
3 AM
39°F
Intermittent clouds
Tomorrow
4 AM
37°F
Intermittent clouds
Tomorrow
5 AM
36°F
Intermittent clouds
Tomorrow
6 AM
34°F
Intermittent clouds
Tomorrow
7 AM
35°F
Intermittent clouds
Tomorrow
8 AM
38°F
Intermittent clouds
Tomorrow
9 AM
41°F
Intermittent clouds
Tomorrow
10 AM
44°F
Intermittent clouds
Tomorrow
11 AM
47°F
Intermittent clouds

7 Day Forecast

Partly sunny

Thursday

65 °F

Partly sunny


Intermittent clouds

Thursday Night

34 °F

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


Partly sunny w/ showers

Friday

53 °F

Cooler with times of clouds and sun; a couple of showers late in the afternoon


Showers

Friday Night

33 °F

A couple of showers in the evening; otherwise, cloudy


Mostly cloudy

Saturday

60 °F

Mostly cloudy


Intermittent clouds

Saturday Night

36 °F

Partly cloudy


Intermittent clouds

Sunday

62 °F

Times of sun and clouds


Mostly cloudy

Sunday Night

33 °F

Becoming cloudy


Showers

Monday

52 °F

Cloudy and cooler with occasional rain; windy in the afternoon


Intermittent clouds

Monday Night

29 °F

Windy in the evening; partly cloudy


Sunrise and Sunset

Sunrise
6:50 AM
Sunset
7:22 PM

Based on AccuWeather data