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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – August 20th, 2018

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

Forecast Discussion:

Quiet and cool dominate the beginning of the week. It will be SO nice for the next three day. Figure 1 shows the first cold front way down to Mexico and Texas with another shot of cool air coming in from the north today.

Figure 2 show that, unfortunately, smoke from the west is being brought down with this northern fetch of air. Yuck.

Again, the headlines is cold front after cold front... Figure 3 is the temperature anomaly (how far below (blue) or above (yellow) normal the surface temperatures will be) for Monday. Figure 4 is the Tuesday map and Figure 5 is the Wednesday map. It will be nice and refreshing out there.

Showers may travel off the mountains at times (primary in the afternoons) but up to the midnight going into Wednesday, Longmont may only see up to 1/4th of an inch.  That's not much water.

Figure 1: The forecast surface map for Sunday PM. From NCEP.

Figure 2: The HRRR (high resolution rapid refresh) model forecast of smoke at all levels for Monday PM.

Figure 3: The surface temperature anomaly (departure from average) for Monday afternoon from the GFS and weather5280.com

Figure 4: The surface temperature anomaly (departure from average) for Tuesday afternoon from the GFS and weather5280.com

Figure 5: The surface temperature anomaly (departure from average) for Wednesday afternoon from the GFS and weather5280.com

Figure 6: The total accumulated precipitation predicted between Sunday PM and midnight at the end of Tuesday from the GFS and weather5280.com

The longer range forecast:

The ridge comes back at the end the week and we climb to nearly 90F each day. We remain quite dry into next weekend.  Not much more I can say about that!

Current Weather

Clear

Clear

59°F

UV Index
0 Low
Pressure
29.87 Rising
Visibility
8 miles
Dewpoint
39 °F
Humidity
48%
Wind
WSW 2.3 mph
Gust
5.1 mph
Wind Chill
59 °F

Hourly Forecast

Today
11 PM
56°F
Mostly clear
Tomorrow
12 AM
54°F
Mostly clear
Tomorrow
1 AM
53°F
Mostly clear
Tomorrow
2 AM
51°F
Mostly clear
Tomorrow
3 AM
50°F
Mostly clear
Tomorrow
4 AM
48°F
Clear
Tomorrow
5 AM
47°F
Clear
Tomorrow
6 AM
46°F
Mostly sunny
Tomorrow
7 AM
50°F
Sunny
Tomorrow
8 AM
57°F
Mostly sunny
Tomorrow
9 AM
64°F
Mostly sunny
Tomorrow
10 AM
72°F
Mostly sunny

7 Day Forecast

Sunny

Thursday

77 °F

Sunny and pleasant


Mostly clear

Thursday Night

46 °F

Clear to partly cloudy


Mostly sunny

Friday

85 °F

Mostly sunny and very warm


Partly cloudy

Friday Night

47 °F

Partly cloudy


Partly sunny w/ t-storms

Saturday

77 °F

Sunny to partly cloudy with a thunderstorm in spots in the afternoon


Partly cloudy

Saturday Night

47 °F

A thunderstorm in spots early in the evening; otherwise, partly cloudy


Mostly sunny

Sunday

84 °F

Mostly sunny, breezy and very warm


Partly cloudy

Sunday Night

47 °F

Partly cloudy


Intermittent clouds

Monday

70 °F

Cooler with clouds and sunshine; an afternoon thunderstorm in spots


Showers

Monday Night

43 °F

A couple of evening showers; otherwise, mostly cloudy


Sunrise and Sunset

Sunrise
5:43 AM
Sunset
8:11 PM

Based on AccuWeather data