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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 13-14, 2019

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

Forecast Discussion:

I'll post early since the showers are ongoing this afternoon, and will continue through the night Friday into Saturday and on into the afternoon. I'm still dealing with spotty internets in St. Louis where an inch of rain is scheduled for tomorrow.

This weekend's storm system is digging south of the state, basically throwing some moisture around the top of the Low up-slope into the Front Range (Figure 1). Our daytime rain, nighttime snow showers will continue through 8pm Saturday (Figure 2).

Through 7am, the HRRR actually gives us 1/2 inch to 1 inch of snow in places (Figure 3). The GFS (a less precise resolution) puts minimal snow around the area but not in town (Figure 4). For precipitation (water content) it is minimal as well (Figure 5).

The longer range forecast:

Our next low moves in Tuesday through Thursday bringing more rain (Figure 2). At least we return to the upper 60'sF and mid 70'sF after this system moves off later Saturday night.

Figure 1: The forecast surface map for Fridaay PM from NCEP.
Figure 2: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 3: the HRRR snowfall prediction up to 7am Saturday from weather5280.com
Figure 4: the forecast accumulated snowfall map from the GFS and weather5280.com for Colorado, over the next 2 days.
Figure 5: the forecast accumulated precipitation/water content map from the GFS and weather5280.com for Colorado, over the next 2 days.

Current Weather

Mostly clear

Mostly clear

45°F

UV Index
0 Low
Pressure
30.14 Steady
Visibility
7 miles
Dewpoint
42 °F
Humidity
87%
Wind
WNW 1.7 mph
Gust
2.7 mph
Wind Chill
45 °F

Hourly Forecast

Today
3 AM
44°F
Intermittent clouds
Today
4 AM
42°F
Intermittent clouds
Today
5 AM
41°F
Intermittent clouds
Today
6 AM
40°F
Intermittent clouds
Today
7 AM
43°F
Intermittent clouds
Today
8 AM
45°F
Mostly sunny
Today
9 AM
51°F
Mostly sunny
Today
10 AM
57°F
Mostly sunny
Today
11 AM
62°F
Mostly sunny
Today
12 PM
66°F
Mostly sunny
Today
1 PM
70°F
Mostly sunny
Today
2 PM
73°F
Mostly sunny

7 Day Forecast

Mostly cloudy w/ showers

Tuesday

63 °F

Turning cloudy and cooler; a passing afternoon shower or two


Partly cloudy w/ t-storms

Tuesday Night

40 °F

Partly cloudy


Mostly sunny

Wednesday

76 °F

Pleasant and warmer with sunshine and patchy clouds


Partly cloudy

Wednesday Night

42 °F

Patchy clouds


Mostly cloudy w/ t-storms

Thursday

73 °F

Becoming cloudy; breezy in the afternoon with a thunderstorm in spots


Thunderstorms

Thursday Night

48 °F

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


Showers

Friday

69 °F

Mostly cloudy with a couple of showers


Cloudy

Friday Night

46 °F

Cloudy


Showers

Saturday

53 °F

Cloudy and cooler with a couple of showers


Showers

Saturday Night

39 °F

Cloudy with occasional rain and drizzle late


Sunrise and Sunset

Sunrise
6:10 AM
Sunset
7:48 PM

Based on AccuWeather data