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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

Light rain

Light rain

60°F

UV Index
1 Low
Pressure
30.12 Steady
Visibility
8 miles
Dewpoint
34 °F
Humidity
37%
Wind
E 2.9 mph
Gust
6.6 mph
Wind Chill
60 °F

Hourly Forecast

Today
5 PM
58°F
Showers
Today
6 PM
57°F
Cloudy
Today
7 PM
54°F
Cloudy
Today
8 PM
55°F
Intermittent clouds
Today
9 PM
52°F
Mostly cloudy w/ t-storms
Today
10 PM
50°F
Intermittent clouds
Today
11 PM
48°F
Intermittent clouds
Tomorrow
12 AM
47°F
Intermittent clouds
Tomorrow
1 AM
45°F
Intermittent clouds
Tomorrow
2 AM
45°F
Intermittent clouds
Tomorrow
3 AM
43°F
Intermittent clouds
Tomorrow
4 AM
42°F
Intermittent clouds

7 Day Forecast

Mostly cloudy w/ showers

Tuesday

63 °F

Turning cloudy and cooler; a passing afternoon shower or two


Partly cloudy w/ t-storms

Tuesday Night

40 °F

An evening thundershower; otherwise, partly cloudy


Mostly sunny

Wednesday

76 °F

Pleasant and warmer with sunshine and patchy clouds


Partly cloudy

Wednesday Night

42 °F

Patchy clouds


Mostly cloudy w/ t-storms

Thursday

73 °F

Becoming cloudy; breezy in the afternoon with a thunderstorm in spots


Cloudy

Thursday Night

48 °F

Considerable cloudiness


Showers

Friday

69 °F

Mostly cloudy with a couple of showers


Thunderstorms

Friday Night

46 °F

Cloudy; thundershowers in the evening followed by periods of rain late


Showers

Saturday

53 °F

Cloudy and cooler with a couple of showers


Showers

Saturday Night

39 °F

Cloudy with occasional rain and drizzle late


Sunrise and Sunset

Sunrise
6:10 AM
Sunset
7:48 PM

Based on AccuWeather data