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The Front Range Forecast: Snow totals, rain this week, then heat

In Brief:

The week starts cool and wet then the heat returns.

Forecast Discussion:

The snowfall reports are coming in (as of 7am) while the storm seems to have ended earlier than expected. Longmont received about 1.5 inches (though there are a couple of higher reports, 4 and 5 inches, I'm not sure about those- Figure 1). Boulder received 5-7 inches.  Broomfield got about 5-6 inches. Most locations received about 3/4th of an inch of water.

Our next front arrives Sunday afternoon followed by some low elevation rain (about a quarter inch) and mountain snows (Figure 2 and 3).

 

Figure0_05212022
Figure 1: the snowfall totals from CoCoRaHS as of Saturday 7am.
Figure1_05212022
Figure 2: the 10 day graphical forecast for Denver from weatherunderground.com
Figure2_05212022
Figure 3: the surface analysis map for Sunday from NOAA.

The Longer Range Forecast:

Yet another front arrives Monday afternoon with maybe 1/3 ro 1/2 inch of rain (Figure 2 and 5). This is driven by another healthy upper air trough (Figure 4). There is thunder possible with both Sunday's and Monday's fronts (Figure 6).

Over the next 5 days, Longmont should see about 3/4th inch of rain.  Broomfield should do better and top an inch. I-25 north of Denver should remain snow free, but the nearby mountains will get buried (Figure 7).

The heat really returns Thursday through Saturday until a Saturday front cools us a bit and brings back a few thunderstorms.

Figure4_05212022
Figure 4: the 500mb map for Tuesday from the GFS and tropicaltidbits.com
Figure5_05212022
Figure 5: the surface analysis map for Monday from NOAA.
Figure3_05212022
Figure 6: the severe and thunderstorm forecast for Monday from the SPC.
Figure6_05212022
Figure 7: the 5 day precipitation total forecast from the GFS and weather5280.com
Figure7_05212022
Figure 7: the 5 day snowfall total forecast from the GFS and weather5280.com

 


About the Author: John Ensworth

John Ensworth used to work from Longmont as the PI for the NASA through the IGES (The Institute for Global Environmental Strategies). He now teaches technology, algebra, astronomy, meteorology, film school, and Lego robotics to middle/high school.
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Current Weather

Cloudy

Cloudy

67°F

UV Index
0 Low
Pressure
30.17 Falling
Visibility
8 miles
Dewpoint
53 °F
Humidity
62%
Wind
SW 3.8 mph
Gust
8.1 mph
Wind Chill
67 °F

Hourly Forecast

Today
1 AM
68°F
Cloudy
Today
2 AM
66°F
Partly cloudy
Today
3 AM
65°F
Partly cloudy
Today
4 AM
64°F
Partly cloudy
Today
5 AM
64°F
Partly cloudy
Today
6 AM
63°F
Mostly sunny
Today
7 AM
66°F
Mostly sunny
Today
8 AM
71°F
Mostly sunny
Today
9 AM
75°F
Mostly sunny
Today
10 AM
81°F
Partly sunny
Today
11 AM
85°F
Partly sunny
Today
12 PM
88°F
Partly sunny

7 Day Forecast

Mostly cloudy

Sunday

93 °F

Thickening clouds


Intermittent clouds

Sunday Night

63 °F

An evening shower in places; otherwise, becoming clear


Mostly cloudy w/ t-storms

Monday

93 °F

Some sunshine giving way to clouds with a thunderstorm in the area late in the afternoon; thunderstorms can bring hail and damaging winds


Partly cloudy w/ t-storms

Monday Night

59 °F

A thunderstorm in spots in the evening; otherwise, clear to partly cloudy; thunderstorms can bring hail and damaging winds


Intermittent clouds

Tuesday

94 °F

Intervals of clouds and sunshine


Partly cloudy

Tuesday Night

60 °F

Partly cloudy


Partly sunny w/ t-storms

Wednesday

84 °F

Not as warm with times of sun and clouds; an afternoon thunderstorm; thunderstorms can bring hail and damaging winds


Mostly cloudy

Wednesday Night

58 °F

An evening thunderstorm; otherwise, mostly cloudy


Mostly cloudy

Thursday

89 °F

Mostly cloudy with a thunderstorm in spots in the afternoon


Intermittent clouds

Thursday Night

58 °F

Partly cloudy


Sunrise and Sunset

Sunrise
5:42 AM
Sunset
8:30 PM

Based on AccuWeather data