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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – December 23, 2018

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

Forecast Discussion:

There were a few flurries in the air in the early morning Saturday.  Nothing more.  Estes Park picked up only 1/2" or so.  This just wasn't much of a storm.  Now it is dry-sailing through Christmas morning.   Sorry, snow on the ground or in the air Christmas morning is very very unlikely now.

Figure 1 shows the Sunday morning map with our upper air disturbance down into Kansas/Oklahoma.  The next storm is crashing on shore in the Pacific northwest.

Figure 1: The forecast surface map for Sunday AM. From NCEP.

The longer range forecast:

Figure 2 shows highs in the 40'sF through Christmas Day.  It will be very nice travel weather for the Plains.  Looking out through Christmas night across the state, the western slopes and higher mountains will get 2 to locally 6 inches of snow. Driving in from the west could be tricky in the mountain passes (Figure 3).

The big change after Christmas in the pattern will chill us to the 30's F daily and give us snow chances every day as well (Figure 2 again). The GFS keeps Longmont in a snow-hole (only 1-2 inches over 10 days!) while much of Colorado will see a foot of snow!!  Some runs recently dropped as much as 4-6 inches of snow in town on the 26th so we need to watch the path of this system - it has the potential to lock up highways and make things rough right after Christmas Day.   Merry Christmas everyone.

Figure 2: the graphical forecast for the next 10 days forecast for Longmont, CO from weatherunderground.com

Figure 3: The forecast accumulated snow map from the GFS and weather5280.com for Colorado, through Christmas Day night.

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

Current Weather

Mostly cloudy

Mostly cloudy

39°F

UV Index
0 Low
Pressure
30.2 Rising
Visibility
7 miles
Dewpoint
31 °F
Humidity
72%
Wind
ENE 3.1 mph
Gust
7.5 mph
Wind Chill
37 °F

Hourly Forecast

Today
1 AM
40°F
Partly cloudy
Today
2 AM
39°F
Partly cloudy w/ showers
Today
3 AM
39°F
Partly cloudy w/ showers
Today
4 AM
38°F
Partly cloudy
Today
5 AM
38°F
Partly cloudy
Today
6 AM
37°F
Partly sunny
Today
7 AM
39°F
Partly sunny
Today
8 AM
43°F
Partly sunny
Today
9 AM
46°F
Partly sunny
Today
10 AM
50°F
Partly sunny
Today
11 AM
53°F
Partly sunny
Today
12 PM
56°F
Partly sunny

7 Day Forecast

Mostly cloudy w/ showers

Friday

76 °F

Some sun, then increasing clouds, becoming breezy this afternoon with a shower in spots late in the afternoon


Partly cloudy w/ showers

Friday Night

37 °F

Partly cloudy with a couple of showers


Partly sunny

Saturday

66 °F

Not as warm with sun and some clouds


Mostly clear

Saturday Night

39 °F

Clear to partly cloudy


Mostly cloudy

Sunday

76 °F

Mostly cloudy and warmer; breezy in the afternoon


Mostly cloudy

Sunday Night

51 °F

Rather cloudy; windy late


Windy

Monday

60 °F

Winds gusting past 40 mph; cloudy and cooler


Intermittent clouds

Monday Night

43 °F

Breezy in the evening; otherwise, partly cloudy


Intermittent clouds

Tuesday

62 °F

Times of clouds and sun; windy in the afternoon


Intermittent clouds

Tuesday Night

36 °F

Clearing


Sunrise and Sunset

Sunrise
5:57 AM
Sunset
7:58 PM

Based on AccuWeather data