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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – January 30, 2019

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

Forecast Discussion:

The big weather story is the tremendous cold pouring out of Canada down into the middle of the U.S. The wind chill (the effective temperature felt by human skin blending temperature and wind speed) map shows wind chill values down below -60°F. Truly amazing (Figure 1).

We are sheltered from this extreme air by our elevation (this air is dense and shallow, relatively speaking) and the upper air flow is directing it to the east (see yesterday's discussion ). There is a frontal boundary just touching the northeast corner of the state (Figure 2) marking the true edge of the arctic flow.

The longer range forecast:

Our longer range forecast is getting more and more mundane. Figure 3 shows temperatures warming to the 50's F for the weekend as a ridge moves in. Our end-of-weekend storm is fading off the map, so to speak. Up in the mountains, that Pacific storm will still bring moisture - Estes Park, for example, may pick up an inch or three this weekend with ongoing daily snow chances (Figure 4). We cool down then, but the next 10 days does not contain significant precipitation from the weatherundergound model, at least.

Figure 1: the wind chill chart from Tuesday PM from weatherunderground.com

Figure 2: The forecast surface map for Tuesday noon. From NCEP.

Figure 3: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com

Figure 4: the graphical forecast for the next 10 days for Estes Park, CO from weatherunderground.com

Current Weather

Cloudy

Cloudy

35°F

UV Index
1 Low
Pressure
30.23 Rising
Visibility
2 miles
Dewpoint
33 °F
Humidity
94%
Wind
NNE 3 mph
Gust
5.6 mph
Wind Chill
33 °F

Hourly Forecast

Today
9 AM
34°F
Mostly cloudy
Today
10 AM
35°F
Flurries
Today
11 AM
37°F
Mostly cloudy w/ flurries
Today
12 PM
38°F
Intermittent clouds
Today
1 PM
39°F
Intermittent clouds
Today
2 PM
40°F
Cloudy
Today
3 PM
41°F
Cloudy
Today
4 PM
42°F
Cloudy
Today
5 PM
40°F
Cloudy
Today
6 PM
39°F
Rain
Today
7 PM
38°F
Rain
Today
8 PM
37°F
Cloudy

7 Day Forecast

Rain and snow

Friday

42 °F

Chilly with some sun, then turning cloudy; a morning rain or snow shower in spots followed by a little rain this afternoon


Rain and snow

Friday Night

32 °F

Periods of snow; rain mixed in early, accumulating 1-3 inches; roads could be slippery


Flurries

Saturday

39 °F

A bit of morning snow with little or no accumulation; otherwise, cloudy and chilly; storm total snowfall 1-3 inches


Intermittent clouds

Saturday Night

31 °F

A shower in places in the evening; otherwise, partly cloudy


Partly sunny

Sunday

64 °F

Partly sunny, pleasant and warmer


Mostly clear

Sunday Night

41 °F

Mainly clear


Intermittent clouds

Monday

79 °F

Warmer with a blend of sun and clouds


Partly cloudy

Monday Night

36 °F

Partly cloudy


Mostly cloudy

Tuesday

64 °F

Mostly cloudy and cooler


Mostly cloudy

Tuesday Night

40 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
6:15 AM
Sunset
7:44 PM

Based on AccuWeather data