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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 sunny

Mostly sunny

74°F

UV Index
2 Low
Pressure
29.89 Falling
Visibility
8 miles
Dewpoint
42 °F
Humidity
32%
Wind
NNE 3.3 mph
Gust
8.2 mph
Wind Chill
74 °F

Hourly Forecast

Today
6 PM
72°F
Sunny
Today
7 PM
69°F
Mostly sunny
Today
8 PM
65°F
Intermittent clouds
Today
9 PM
62°F
Mostly cloudy
Today
10 PM
58°F
Mostly cloudy
Today
11 PM
56°F
Mostly cloudy
Tomorrow
12 AM
53°F
Intermittent clouds
Tomorrow
1 AM
51°F
Partly cloudy
Tomorrow
2 AM
48°F
Mostly clear
Tomorrow
3 AM
46°F
Mostly clear
Tomorrow
4 AM
44°F
Clear
Tomorrow
5 AM
43°F
Mostly clear

7 Day Forecast

Mostly sunny

Wednesday

75 °F

Mostly sunny, pleasant and warmer


Partly cloudy

Wednesday Night

41 °F

Patchy clouds


Mostly cloudy w/ t-storms

Thursday

75 °F

Turning cloudy, warm; breezy, a thunderstorm around in the afternoon


Thunderstorms

Thursday Night

49 °F

A thunderstorm in spots in the evening; otherwise, considerable cloudiness


Showers

Friday

70 °F

Mostly cloudy with a couple of showers


Thunderstorms

Friday Night

46 °F

Cloudy with showers and thunderstorms


Rain

Saturday

50 °F

Chilly with periods of rain


Rain and snow

Saturday Night

39 °F

Cloudy with rain, mixed with a little snow late


Mostly cloudy

Sunday

59 °F

Mostly cloudy with a stray thundershower in the afternoon


Partly cloudy

Sunday Night

36 °F

Partly cloudy


Sunrise and Sunset

Sunrise
6:08 AM
Sunset
7:49 PM

Based on AccuWeather data