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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 11, 2019

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

Forecast Discussion:

This is a part 2 post to the very active April 10th discussion. The winter storm is just getting underway and warnings (winter storm and blizzard) are just now in effect as this posts. Be safe out there! I'm in St. Louis (missing all the fun) and have no internet connection after my evening meetings. (I know!)

The next 15 hours after noon Wednesday from the HRRR (Figure 1) have about an inch over Longmont with heavier amounts east and west of us.

The GFS, over the next 2 days, ends up giving Longmont 3-4 inches of snow. Add wind and you have a travel mess shaping up Wednesday night into Thursday AM (Figure 2). In Figure 3, this storm largely wraps up in the early morning hours Thursday with some snow flurry chances later in the day.

The longer range forecast:

A big deep south low forms on the heals of this storm and moves up to dump rain on me in St. Louis, then a third storm rolls out of the U.S. Northwest to bring some rain/snow chances back (Figure 3) Friday night into Saturday AM. More on that AFTER the Wed/Thur storm actually wraps up.

Figure 1: the forecast accumulated snowfall map from the HRRR and weather5280.com for Colorado, over the next 15 hours.
Figure 2: the forecast accumulated snowfall map from the GFS and weather5280.com for Colorado, over the next 2 days.
Figure 3: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com


Current Weather

Mostly cloudy

Mostly cloudy

41°F

UV Index
0 Low
Pressure
29.76 Steady
Visibility
8 miles
Dewpoint
29 °F
Humidity
64%
Wind
N 2.2 mph
Gust
5.1 mph
Wind Chill
41 °F

Hourly Forecast

Today
3 AM
39°F
Mostly cloudy
Today
4 AM
37°F
Intermittent clouds
Today
5 AM
36°F
Intermittent clouds
Today
6 AM
34°F
Intermittent clouds
Today
7 AM
36°F
Intermittent clouds
Today
8 AM
38°F
Intermittent clouds
Today
9 AM
41°F
Intermittent clouds
Today
10 AM
44°F
Intermittent clouds
Today
11 AM
47°F
Intermittent clouds
Today
12 PM
49°F
Intermittent clouds
Today
1 PM
51°F
Intermittent clouds
Today
2 PM
52°F
Intermittent clouds

7 Day Forecast

Partly sunny

Thursday

65 °F

Partly sunny


Intermittent clouds

Thursday Night

34 °F

Partly cloudy


Partly sunny w/ showers

Friday

52 °F

Cooler with times of clouds and sun; a couple of showers late this afternoon


Showers

Friday Night

34 °F

A couple of showers this evening; otherwise, cloudy


Mostly cloudy

Saturday

60 °F

Mostly cloudy


Intermittent clouds

Saturday Night

34 °F

Partly cloudy


Intermittent clouds

Sunday

62 °F

Periods of clouds and sun


Mostly cloudy

Sunday Night

33 °F

Becoming cloudy


Showers

Monday

52 °F

Cloudy and cooler with occasional rain; windy in the afternoon


Intermittent clouds

Monday Night

29 °F

Windy in the evening; partly cloudy


Sunrise and Sunset

Sunrise
6:50 AM
Sunset
7:22 PM

Based on AccuWeather data