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Longmont Weather Forecast 6/23-24/2020

In Brief:

Fairly hot weather with afternoon thunderstorms is the rule except for a brief cool down and increase in storm chances Friday.

Forecast Discussion:

Some atmospheric moisture is sitting around Colorado this week. Daytime heating will kick off afternoon storms in the mountains and eastward (Figure 1 in the gallery). Northwest flow aloft will allow surprise enhancement of these storms to near severe levels at times (Figure 2) as small (hard to observe in advance) ripples in the flow can create more instability and lift if timed correctly. We do return to the lower 90'sF Wednesday and Thursday as the upper level ridge axis inches back towards Colorado (Figure 3 and 2).

Note, with northwest flow, the smoke from Arizona wildfires has been pushed FAR to the south (Figure 7) - whew!

The Longer Range Forecast:

Later this week, the trough out west makes a run to the east (Figure 5) bringing in a brief chance in the weather (cooler!) Thursday PM through Saturday AM (Figure 3). A fair amount of moisture gets pulled in by this system by Thursday PM into Friday AM (Figure 4).  Between the daily afternoon storms and the enhanced storminess Friday, the GFS gives us 1/2 to 3/4th of an inch of rain over the next 5 days (Figure 6). Not great but not bad.

The Video Forecast for the week beginning June 24th, 2020

 




Comments

Cloudy

Cloudy

76°F

UV Index
0 Low
Pressure
30.25 Rising
Visibility
10 miles
Dewpoint
51 °F
Humidity
41%
Wind
SSE 4.6 mph
Gust
9.1 mph
Wind Chill
76 °F

Forecast


Partly sunny w/ t-storms

Friday

88 °F

Sunshine mixing with some clouds with a thunderstorm in the area late this afternoon


Intermittent clouds

Friday Night

60 °F

Becoming clear


Partly sunny w/ t-storms

Saturday

89 °F

Intervals of clouds and sunshine with a couple of showers and a thunderstorm in the afternoon


Mostly cloudy

Saturday Night

59 °F

Becoming partly cloudy


Thunderstorms

Sunday

88 °F

Rather cloudy with a shower or thunderstorm in spots in the afternoon


Mostly clear

Sunday Night

58 °F

Clear to partly cloudy


Mostly sunny

Monday

93 °F

Mostly sunny


Mostly clear

Monday Night

58 °F

Mainly clear


Partly sunny

Tuesday

99 °F

Hot with more sunshine than clouds; caution advised if outside for extended periods of time


Mostly clear

Tuesday Night

60 °F

Mainly clear


Sunrise and Sunset

Sunrise
11:36 AM
Sunset
2:33 AM

Based on AccuWeather data