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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – June 30, 2019

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

In Brief:

We peak in the 90'sF one more day today (Sunday), then cool to more normal temperatures (or upper 80'sF) for the week. A return of moisture means that thunderstorms will start to drift off the mountains each afternoon.

Forecast Discussion:

The upper level ridge is moving off a bit so the extreme heat of the weekend will fade a bit after Sunday. But we still have another 90F+ day today (Sunday). Moisture from a failed tropical system off Mexico is pouring into the desert southwest and Colorado (Figure 1). This will allow our more normal pattern of afternoon storms to form in the mountains and drift to the lower elevations in the afternoon (Figure 2).

The Longer Forecast

The week looks to feature normal to a bit above normal (upper 80's) and the afternoon storms continue (Figure 3). I return from the remote nether regions of Colorado on Sunday and will again bathe in the glow of eternal internet. (The campfire smoke is getting to my brain.)

Figure 1 update: the water vapor satellite image (browns/reds are dry air, whites and light grey is moist air, purple/blue is ice and high cloud tops). From the Weather Channel.
Figure 2: The forecast surface map for late Sunday night from NCEP.
Figure 3: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com

Current Weather

Partly sunny

Partly sunny

60°F

UV Index
1 Low
Pressure
29.91 Rising
Visibility
8 miles
Dewpoint
28 °F
Humidity
30%
Wind
ESE 3.8 mph
Gust
7 mph
Wind Chill
60 °F

Hourly Forecast

Today
8 PM
57°F
Mostly cloudy
Today
9 PM
53°F
Mostly cloudy
Today
10 PM
51°F
Mostly cloudy
Today
11 PM
48°F
Mostly cloudy
Tomorrow
12 AM
45°F
Cloudy
Tomorrow
1 AM
43°F
Cloudy
Tomorrow
2 AM
43°F
Cloudy
Tomorrow
3 AM
42°F
Cloudy
Tomorrow
4 AM
40°F
Mostly cloudy
Tomorrow
5 AM
39°F
Intermittent clouds
Tomorrow
6 AM
37°F
Partly sunny
Tomorrow
7 AM
35°F
Partly sunny

7 Day Forecast

Mostly cloudy

Thursday

65 °F

Becoming cloudy


Mostly cloudy

Thursday Night

35 °F

Mostly cloudy


Partly sunny

Friday

71 °F

Pleasant 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

76 °F

Rather cloudy; breezy in the afternoon


Intermittent clouds

Sunday Night

46 °F

Partly cloudy


Cloudy

Monday

60 °F

Cloudy and cooler with a shower in spots; windy in the afternoon


Mostly cloudy

Monday Night

41 °F

Breezy in the evening; otherwise, mostly cloudy


Sunrise and Sunset

Sunrise
5:58 AM
Sunset
7:57 PM

Based on AccuWeather data