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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 3, 2018

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

Forecast Discussion:

Winds are roaring Monday PM with gusts topping 60mph in places. The down slope flow is keeping us pretty warm.  Today (Tuesday) the winds will continue, even if not quite as high, as one can see Tuesday morning from the GFS in Figure 1.  Very cold air is coming in aloft which will cool temperatures (about 20F lower than Monday), but the down slope will fight that with some warming. It could have been colder. Interesting situation!

The weather gets mild and calm (boring) for a couple of days...then the next storm comes...

Figure 1: The GFS surface wind speed forecast for midday Tuesday from tropicaltidbits.com Longmont is the pink dot.

The longer range forecast:

Our next storm comes in from the west and north Friday morning.  Figure 2 is the 6 hour surface pressure and precipitation depiction for Friday at sunrise.  Snow is moving into the mountains and rain and snow are coming in from the west and north.

Figure 3 is midday Friday - snow is picking up a lot and rain and snow are pouring southward into the state and beginning to hit Longmont.

Figure 4, for Friday night, sees very strong winds roaring down the Front Range with moderate to heavy snow falling. The precipitation has made it south of Colorado Springs by this time.

Figure 5 is a (very far out) snowfall total forecast - Longmont gets 1-2 inches in this situation, if correct.  More later!

Figure 2: the 6 hour precipitation snapshot Friday sunrise from the GFS and tropicaltidbits.com Longmont is the pink dot.

Figure 3: the 6 hour precipitation snapshot Friday midday from the GFS and tropicaltidbits.com Longmont is the pink dot.

Figure 4: the 6 hour precipitation snapshot Friday evening from the GFS and tropicaltidbits.com Longmont is the pink dot.

Figure 5: the total snowfall forecast between Monday PM and Friday midnight to Saturday. Longmont is the pink dot.

Current Weather

Snow

Snow

36°F

UV Index
0 Low
Pressure
30.28 Steady
Visibility
2 miles
Dewpoint
32 °F
Humidity
85%
Wind
NNE 3.4 mph
Gust
6.2 mph
Wind Chill
34 °F

Hourly Forecast

Today
6 PM
36°F
Rain
Today
7 PM
36°F
Rain
Today
8 PM
36°F
Cloudy
Today
9 PM
36°F
Snow
Today
10 PM
36°F
Cloudy
Today
11 PM
36°F
Snow
Tomorrow
12 AM
36°F
Snow
Tomorrow
1 AM
35°F
Cloudy
Tomorrow
2 AM
35°F
Cloudy
Tomorrow
3 AM
34°F
Cloudy
Tomorrow
4 AM
34°F
Snow
Tomorrow
5 AM
33°F
Snow

7 Day Forecast

Rain and snow

Friday

41 °F

Chilly; rain and snow showers this morning with little or no accumulation followed by rain and drizzle this afternoon


Snow

Friday Night

33 °F

Periods of wet snow, 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 cold; storm total snowfall 1-3 inches


Intermittent clouds

Saturday Night

30 °F

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


Partly sunny

Sunday

64 °F

Partly sunny 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

40 °F

Partly cloudy


Mostly cloudy

Tuesday

66 °F

Mostly cloudy and not as warm


Mostly cloudy

Tuesday Night

40 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
6:15 AM
Sunset
7:44 PM

Based on AccuWeather data