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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – January 19, 2019

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

Forecast Discussion:

The snow reports will come in at 7am and through the day, so I'll update this article later on Saturday to see how our county did.  We are clearly between systems today (and Sunday) as seen in Figure 1.

For the eclipse tomorrow night (Sunday night - see my earlier invitation to visit the Cherrywood Observatory during the eclipse) - skies seem to be 50/50 on clouds (but the moon clearly 'gets past' all but the worst sky conditions). Temperatures will be a few degrees above freezing and winds will be light around 5mph (red dash in Figure 2- Sunday).  I'll add some sky forecast graphics tomorrow (Saturday afternoon) as they come out.

Figure 1: The forecast surface map for Saturday PM. From NCEP.The longer range forecast:

Monday, a very quick moving system gives a brief window of moderate to heavy snow. With marginal temperatures (yet again) weatherunderground is only giving us an inch or so (Figure 2).  The GFS is more bullish and gives us 2-3 inches.  This bears watching after the 1/2 inch NE Longmont received today - when (nearly) no snow was expected by the GFS.  Watch for an update here tomorrow!

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 Tuesday noon.

Current Weather

Sunny

Sunny

48°F

UV Index
3 Moderate
Pressure
29.86 Falling
Visibility
8 miles
Dewpoint
33 °F
Humidity
55%
Wind
W 1.6 mph
Gust
3.5 mph
Wind Chill
48 °F

Hourly Forecast

Today
9 AM
52°F
Mostly sunny
Today
10 AM
56°F
Partly sunny
Today
11 AM
60°F
Partly sunny
Today
12 PM
63°F
Partly sunny
Today
1 PM
67°F
Partly sunny
Today
2 PM
69°F
Partly sunny
Today
3 PM
72°F
Partly sunny
Today
4 PM
70°F
Partly sunny
Today
5 PM
65°F
Partly sunny
Today
6 PM
60°F
Partly sunny
Today
7 PM
55°F
Partly sunny
Today
8 PM
52°F
Partly cloudy

7 Day Forecast

Partly sunny

Friday

72 °F

Pleasant with partial sunshine; breezy this afternoon


Partly cloudy w/ showers

Friday Night

37 °F

Partly cloudy with a couple of showers late


Partly sunny

Saturday

66 °F

Sun and some clouds


Mostly clear

Saturday Night

40 °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 becoming strong; cloudy and cooler with a shower in spots


Intermittent clouds

Monday Night

43 °F

Breezy in the evening; otherwise, partly cloudy


Windy

Tuesday

62 °F

Strong winds; partly sunny


Partly cloudy

Tuesday Night

36 °F

Partly cloudy


Sunrise and Sunset

Sunrise
5:57 AM
Sunset
7:58 PM

Based on AccuWeather data