Skip to content

The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 21 , 2018

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

Forecast Discussion:

We are still cold.  (I'm not going to tell you the current temperature in D.C., but it rhymes with 64F - the high out here tomorrow rhymes with 78F). Figure 1 shows the stationary front to our west.  Figure 2 is the upper air pattern with a deep trough over the west and jet stream energy to the south of the state.  Any little disturbance traveling through will kick off snow in the mountains and snow flurries on the low lands.

Figure 1: The forecast surface map from NCEP for this morning (Wednesday).

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

The longer range forecast:

With the pattern changing little until Saturday- we stay below the normal high temperature for this time of year (48F - the thick green line in Figure 3).  The almost constant, but slight, chance of snow is plotted here as well. A slightly better chance of snow for everyone returns on Friday- as the front returns as a warm front and passes across the state with the departing trough.

Figure 3: A portion of the 10 day graphical forecast map from weatherunderground.com

Current Weather

Cloudy

Cloudy

49°F

UV Index
1 Low
Pressure
29.9 Steady
Visibility
7 miles
Dewpoint
45 °F
Humidity
84%
Wind
NW 1.1 mph
Gust
2.5 mph
Wind Chill
49 °F

Hourly Forecast

Today
8 AM
51°F
Partly sunny
Today
9 AM
59°F
Partly sunny
Today
10 AM
65°F
Intermittent clouds
Today
11 AM
71°F
Intermittent clouds
Today
12 PM
75°F
Intermittent clouds
Today
1 PM
77°F
Intermittent clouds
Today
2 PM
75°F
Thunderstorms
Today
3 PM
73°F
Cloudy
Today
4 PM
73°F
Cloudy
Today
5 PM
72°F
Cloudy
Today
6 PM
68°F
Cloudy
Today
7 PM
65°F
Cloudy

7 Day Forecast

Mostly cloudy w/ t-storms

Thursday

77 °F

Turning cloudy, warm; breezy, a stray thunderstorm this afternoon


Thunderstorms

Thursday Night

47 °F

A thunderstorm in spots this evening; otherwise, considerable cloudiness


Thunderstorms

Friday

69 °F

Mostly cloudy and not as warm with a couple of thundershowers


Thunderstorms

Friday Night

44 °F

Cloudy with a couple of thundershowers


Rain

Saturday

46 °F

Chilly with periods of rain and a thunderstorm


Rain and snow

Saturday Night

39 °F

Cloudy with rain, mixed with a little snow late


Mostly cloudy

Sunday

59 °F

Mostly cloudy and warmer; a stray afternoon thundershower


Partly cloudy

Sunday Night

36 °F

Partly cloudy


Mostly sunny

Monday

71 °F

Mostly sunny and warmer


Partly cloudy

Monday Night

39 °F

Partly cloudy


Sunrise and Sunset

Sunrise
6:07 AM
Sunset
7:50 PM

Based on AccuWeather data