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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

43°F

UV Index
0 Low
Pressure
29.93 Rising
Visibility
8 miles
Dewpoint
30 °F
Humidity
61%
Wind
NE 2.8 mph
Gust
6 mph
Wind Chill
42 °F

Hourly Forecast

Today
5 AM
37°F
Mostly cloudy
Today
6 AM
35°F
Mostly cloudy
Today
7 AM
38°F
Mostly cloudy
Today
8 AM
42°F
Mostly sunny
Today
9 AM
47°F
Mostly sunny
Today
10 AM
51°F
Mostly sunny
Today
11 AM
55°F
Mostly sunny
Today
12 PM
58°F
Mostly sunny
Today
1 PM
60°F
Partly sunny
Today
2 PM
62°F
Intermittent clouds
Today
3 PM
63°F
Mostly cloudy
Today
4 PM
64°F
Mostly cloudy

7 Day Forecast

Intermittent clouds

Thursday

64 °F

A blend of sun and clouds; breezy this afternoon


Mostly cloudy

Thursday Night

35 °F

Mostly cloudy


Partly sunny

Friday

68 °F

Increasingly windy with partial sunshine


Partly cloudy

Friday Night

38 °F

Partly cloudy


Partly sunny

Saturday

66 °F

Partial sunshine


Mostly clear

Saturday Night

41 °F

Clear to partly cloudy


Mostly cloudy

Sunday

78 °F

Rather cloudy and warmer; windy in the afternoon


Intermittent clouds

Sunday Night

43 °F

Partly cloudy; windy late


Mostly cloudy

Monday

60 °F

Mostly cloudy, breezy and cooler


Mostly cloudy

Monday Night

43 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
5:58 AM
Sunset
7:57 PM

Based on AccuWeather data