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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 8, 2019

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

Forecast Discussion:

The storm is past and the cold air is being modified (warmed by the sun) and pushed to the east. High pressure dominates the region (Figure 1).

On Thursday we were some -25°F below normal (Figure 2). By Friday (today) noon, we'll only be about -15°F below normal. Wow! Heat wave.

The longer range forecast:

Sunday, another shot of cold comes from western Canada and the northern U.S. Rockies. Figure 4 shows the maximum extent of this cold air - it is not extending as far south and is not as impactful to Longmont.  That has us about -15°F below normal again. This next cool down drops us from a high in the lower 40's F on Saturday to right about freezing for Sunday (Figure 5).

The snow chances are pretty minimal, at this time, with this front. They don't print a snow amount on the weatherunderground site - the GFS gives us a coating to 1 inch Saturday PM into Sunday AM (Figure 6).  We probably won't have to shovel much this time.

Figure 2: The forecast surface map for Friday AM. From NCEP.

Figure 2: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Thursday noon.

Figure 3: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Friday noon.

Figure 4: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Sunday noon.

Figure 5: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com

Figure 6: the forecast accumulated snow map from the GFS and weather5280.com for Colorado, through Sunday noon.

Current Weather

Mostly cloudy

Mostly cloudy

41°F

UV Index
0 Low
Pressure
29.79 Rising
Visibility
8 miles
Dewpoint
30 °F
Humidity
65%
Wind
N 3.3 mph
Gust
5.9 mph
Wind Chill
39 °F

Hourly Forecast

Today
5 AM
36°F
Showers
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
Today
3 PM
52°F
Intermittent clouds
Today
4 PM
51°F
Intermittent clouds

7 Day Forecast

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


Mostly sunny

Tuesday

61 °F

Mostly sunny and milder


Clear

Tuesday Night

29 °F

Clear


Sunrise and Sunset

Sunrise
6:48 AM
Sunset
7:23 PM

Based on AccuWeather data