Skip to content

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

Light rain

Light rain

39°F

UV Index
1 Low
Pressure
30.24 Steady
Visibility
7 miles
Dewpoint
35 °F
Humidity
83%
Wind
NNE 5.5 mph
Gust
9.2 mph
Wind Chill
35 °F

Hourly Forecast

Today
3 PM
41°F
Showers
Today
4 PM
42°F
Showers
Today
5 PM
40°F
Cloudy
Today
6 PM
39°F
Rain
Today
7 PM
38°F
Rain
Today
8 PM
37°F
Cloudy
Today
9 PM
35°F
Flurries
Today
10 PM
35°F
Cloudy
Today
11 PM
35°F
Rain and snow
Tomorrow
12 AM
35°F
Rain and snow
Tomorrow
1 AM
34°F
Cloudy
Tomorrow
2 AM
34°F
Snow

7 Day Forecast

Rain and snow

Friday

42 °F

Chilly; rain and snow showers this morning with little or no accumulation followed by rain and drizzle this afternoon


Rain and snow

Friday Night

32 °F

Periods of snow; rain mixed in early, accumulating 1-3 inches; roads could be slippery


Flurries

Saturday

39 °F

A bit of morning snow with little or no accumulation; otherwise, cloudy and chilly; storm total snowfall 1-3 inches


Intermittent clouds

Saturday Night

31 °F

A shower in places in the evening; otherwise, partly cloudy


Partly sunny

Sunday

64 °F

Partly sunny, pleasant and warmer


Mostly clear

Sunday Night

41 °F

Mainly clear


Intermittent clouds

Monday

79 °F

Warmer with a blend of sun and clouds


Partly cloudy

Monday Night

36 °F

Partly cloudy


Mostly cloudy

Tuesday

64 °F

Mostly cloudy and cooler


Mostly cloudy

Tuesday Night

40 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
6:15 AM
Sunset
7:44 PM

Based on AccuWeather data