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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 2, 2019

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

Forecast Discussion:

We keep warming up (even if we get windy at times) this weekend as the super-cold slides northeast out of the U.S. over the next couple of days.  Easy come, easy go? (Figure 1). The big ridge overhead is the force responsible for our comfort as is the corresponding departing trough out east (Figure 2).

The ripple in the jet stream to our south will be associated with some storminess that will bring snow to the western slopes into the later weekend. We stay dry down on the Plains (Figure 3 and 4).  Even Estes Park is expected to receive only some rain on Sunday. That is unusual February warmth!

The longer range forecast:

Things are still looking cool and mostly cloudy in Punxsutawney, Pa for this morning (we'll see what the guys in the top hats say) and clear locally, though clouds form as moisture in the mid levels slips over the Rockies from that approaching western storm (Figure 5). The models are all over the place concerning our midweek snow chances, so don't place any bets yet.  The weather undergroundmodel gives us 1-3 inches.  But, really, anything is on the table from 0 to 6 inches at this point.  You'll have to come back later to find out!

Figure 1: the current temperatures chart from Friday PM from weatherunderground.com

Figure 2: NCEP 500 mb upper air map from Friday PM. Blue lines are ridges, red lines are troughs.

Figure 3: The forecast surface map for Saturday night. From NCEP.

Figure 4: The forecast surface map for Sunday AM. From NCEP.

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

Current Weather

Mostly clear

Mostly clear

59°F

UV Index
0 Low
Pressure
29.93 Steady
Visibility
8 miles
Dewpoint
38 °F
Humidity
46%
Wind
NNW 2.7 mph
Gust
4.9 mph
Wind Chill
59 °F

Hourly Forecast

Today
9 PM
57°F
Partly cloudy w/ showers
Today
10 PM
54°F
Mostly clear
Today
11 PM
51°F
Mostly clear
Tomorrow
12 AM
49°F
Mostly clear
Tomorrow
1 AM
48°F
Mostly clear
Tomorrow
2 AM
46°F
Mostly clear
Tomorrow
3 AM
45°F
Mostly clear
Tomorrow
4 AM
43°F
Mostly clear
Tomorrow
5 AM
42°F
Mostly clear
Tomorrow
6 AM
39°F
Mostly sunny
Tomorrow
7 AM
41°F
Mostly sunny
Tomorrow
8 AM
47°F
Intermittent clouds

7 Day Forecast

Intermittent clouds

Saturday

64 °F

Cooler with clouds giving way to some sun


Mostly clear

Saturday Night

39 °F

A shower in spots this evening; otherwise, clear to partly cloudy


Mostly cloudy

Sunday

78 °F

Cloudy most of the time, breezy and warmer


Mostly cloudy

Sunday Night

47 °F

Rather cloudy and windy


Windy

Monday

60 °F

Very windy; cloudy and cooler


Intermittent clouds

Monday Night

41 °F

Partly cloudy


Intermittent clouds

Tuesday

59 °F

Cool with times of clouds and sun; windy in the afternoon


Partly cloudy

Tuesday Night

32 °F

Partly cloudy


Intermittent clouds

Wednesday

60 °F

Times of clouds and sun


Intermittent clouds

Wednesday Night

35 °F

Partly cloudy


Sunrise and Sunset

Sunrise
5:55 AM
Sunset
7:59 PM

Based on AccuWeather data