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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 14, 2019

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

Forecast Discussion:

Happy Valentines Day everyone!

We warm to mid 50'sF again today with some more down slope winds and compression ahead of a weak cold front slipping in from the northeast (Figure 1). This front will make it back to the lower foothills tonight before pulling away tomorrow.

With this front, we'll see clouds increase and a chance of showers (snow) this evening (Figure 2). The snowfall through Saturday noon is minimal here in town, but quite impressive in the nearby mountains (1.5 feet in many places - Figure 3).

The Valentines Night forecast:  Breezy, with snow flurries possible. temperatures just above freezing at dinnertime and dropping to freezing before midnight. Cloudy skies (not much of a romantic moon out, but it will be up just past 1st quarter). 

The longer range forecast:

We return to the 50'sF on Friday but a much stronger series of cold fronts begin to hit Saturday PM. By Monday morning we are cold enough to stay below freezing all day and are about 15F below normal (Figure 4). Amazingly cold air is sitting out just east of us. The 10 day snowfall is now sitting at 3-4 inches from the GFS (Figure 5).

Figure 1: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Thursday noon.
Figure 2: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 3: the forecast accumulated snow map from the GFS and weather5280.com for Colorado, through Saturday noon.
Figure 4: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Monday noon.
Figure 5: the forecast accumulated snow map from the GFS and weather5280.com for Colorado, through the next 10 days.

Current Weather

Mostly cloudy

Mostly cloudy

47°F

UV Index
0 Low
Pressure
29.57 Falling
Visibility
8 miles
Dewpoint
42 °F
Humidity
81%
Wind
SSW 2.3 mph
Gust
5.6 mph
Wind Chill
47 °F

Hourly Forecast

Today
6 AM
51°F
Cloudy
Today
7 AM
52°F
Cloudy
Today
8 AM
55°F
Cloudy
Today
9 AM
60°F
Cloudy
Today
10 AM
62°F
Cloudy
Today
11 AM
65°F
Cloudy
Today
12 PM
68°F
Cloudy
Today
1 PM
67°F
Mostly cloudy
Today
2 PM
70°F
Mostly cloudy
Today
3 PM
68°F
Mostly cloudy
Today
4 PM
67°F
Mostly cloudy
Today
5 PM
65°F
Cloudy

7 Day Forecast

Thunderstorms

Friday

70 °F

Mostly cloudy with a couple of thundershowers this afternoon; gusty winds and small hail can accompany any downpour


Thunderstorms

Friday Night

45 °F

Cloudy; a couple of showers and a thunderstorm this evening followed by periods of rain late; gusty winds and small hail can accompany any downpour


Rain

Saturday

48 °F

Chilly with periods of rain and a thunderstorm; travel in the foothills and mountains will be slippery due to snow


Rain and snow

Saturday Night

39 °F

Cloudy with rain, mixed with a little snow late; travel in the foothills and mountains will be slippery due to snow


Mostly cloudy

Sunday

59 °F

Mostly cloudy and warmer


Partly cloudy

Sunday Night

36 °F

Partly cloudy


Partly sunny

Monday

71 °F

Partly sunny, pleasant and warmer


Partly cloudy

Monday Night

45 °F

Partly cloudy


Mostly sunny

Tuesday

73 °F

Pleasant with sunshine and patchy clouds


Partly cloudy

Tuesday Night

43 °F

Partly cloudy


Sunrise and Sunset

Sunrise
6:06 AM
Sunset
7:51 PM

Based on AccuWeather data