Skip to content

The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 7 , 2018

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

Forecast Discussion:

As my update pointed out this morning, we did not get any precipitation from this latest storm, though the mountains and even Boulder received some snow.  Figure 1 is the

next 10 day graphical forecast for our fair city.  The Saturday storm looms large, but with only 1-3" predicted, most storms this size have faded out before we get to that time. There is another storm Monday/Tuesday after that that is a bit less impressive in the models.

Figure 1: The 10 day graphical forecast for Longmont from weatherunderground.com

The longer range forecast:

Figure 2 is the first of the upper air maps where we are tracking the troughs (red lines) that help kick up storms around here. Later today, we can see the trough for yesterday's storm moving off to the east. Figure 3 is the same map for Saturday PM, that is a fairly deep trough passing overhead.  Figure 4 is the approaching storm next Monday - this is another good looking trough.

All of these are storm systems are on the move. They are not digging a big cut-off low that may sit in the southern parts of the state and pump moisture into the cold air dammed up against the mountains.  This is just not the right pattern for the big Plains storms we like now and then. The mountains keep getting brush after brush of snow - which is great for them.

Figure 2: The 500mb upper air forecast map from the GFS for Wednesday PM.

Figure 3: The 500mb upper air forecast map from the GFS for Saturday PM.

Figure 4: The 500mb upper air forecast map from the GFS for Monday PM.

Current Weather

Cloudy

Cloudy

48°F

UV Index
0 Low
Pressure
30.15 Falling
Visibility
8 miles
Dewpoint
46 °F
Humidity
90%
Wind
WNW 1.7 mph
Gust
2.8 mph
Wind Chill
48 °F

Hourly Forecast

Tomorrow
12 AM
47°F
Intermittent clouds
Tomorrow
1 AM
45°F
Intermittent clouds
Tomorrow
2 AM
45°F
Intermittent clouds
Tomorrow
3 AM
43°F
Intermittent clouds
Tomorrow
4 AM
42°F
Intermittent clouds
Tomorrow
5 AM
41°F
Intermittent clouds
Tomorrow
6 AM
40°F
Intermittent clouds
Tomorrow
7 AM
42°F
Intermittent clouds
Tomorrow
8 AM
46°F
Mostly sunny
Tomorrow
9 AM
52°F
Mostly sunny
Tomorrow
10 AM
57°F
Mostly sunny
Tomorrow
11 AM
63°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

A couple of evening thundershowers; 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


Cloudy

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