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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – October 25, 2017

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

Forecast Discussion:

I'm on the road again Tuesday night, so I'm just going to focus, graphically, on the Thursday/Friday early AM snow chances.  Before that, we just might tie or exceed the DIA record of 80F for Wednesday.  It is always the hottest before the storm.  With some windy conditions and that dry heat, fire danger will be elevated across the Front Range today.

In the longer range:

The National Weather Service is not excited about snow on Thursday - but mention a chance of rain and much colder temperatures and wind (get those long pants out and find your coat again). Figure 1 is the GFS total snowfall predication and puts Longmont at around 2 inches. The WFR model (Figure 2) puts us on the edge of snow and no snow (due to temperatures) but a Trace to an inch is possible. Figure 3 is the same with the NAM model and has us around 1 inch of snow.  The weatherunderground model doesn't drop the temperatures in Longmont low enough for snow until the precipitation chances drop to almost zero.  So no snow or just a dusting according to them.  Finally, the Weather5280 snow gamblers chart makes a Trace likely, but any more snow than that very unlikely.

More tomorrow!

Figure 1: The GFS total snowfall between midnight Wednesday and Thursday PM.

Figure 2: The WFR model total snowfall between midnight Wednesday and Thursday PM.

Figure 3: The NAM total snowfall between midnight Wednesday and Thursday PM.

Figure 4: The weatherunderground bestforecast model graphical 10 day forecast.

Current Weather

Mostly cloudy

Mostly cloudy

37°F

UV Index
0 Low
Pressure
29.81 Steady
Visibility
8 miles
Dewpoint
29 °F
Humidity
71%
Wind
NNE 2.2 mph
Gust
4.1 mph
Wind Chill
37 °F

Hourly Forecast

Today
6 AM
38°F
Showers
Today
7 AM
37°F
Mostly cloudy
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
Today
5 PM
50°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