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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – December 11, 2018

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

Forecast Discussion:

If the forecasters at WeatherBell are correct, there is some serious cold winter-like conditions on their way around Christmas and beyond... but models disagree on this, so it will be fun to watch.  In the meantime, unusually warm beautiful weather is the story (except for our brief mid-week cold front).

A very weak, dry cold front heads through today, but temperatures won't reflect that (Figure 1). Figure 2 shows us about 10F above normal today.  Figure 3 has us maybe 12F above average tomorrow.  The cold front comes through later Wednesday, so Thursday (Figure 4) cools to near average around town (colder in the mountains).  Figure 4 does show a bit of down slope warming around Ft. Collins and eastward.

Figure 5 is the snowfall over the next 5 days (from the GFS) and we have measurable snow up into the southwest side of Longmont - a dusting to a coating is likely after that front comes through. The Western Slopes get 2-3 inches (with locally higher amounts).

Figure 1: The forecast surface map for Tuesday night. From NCEP.

Figure 2: The surface temperature departure from normal for Tuesday noon from weather5280.com

Figure 3: The surface temperature departure from normal for Wednesday noon from weather5280.com

Figure 4: The surface temperature departure from normal for Thursday noon from weather5280.com

Figure 5: The forecast accumulated snow map from the GFS and weather5280.com for Colorado, through the next 5 days.

The longer term forecast:

We warm up for the weekend and have no more measurable precipitation expected for the next 10 days.  Enjoy the quiet-ness!

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