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The Front Range Forecast: Light snow, bitter cold

In Brief:

Very cold air makes a short return and brings a little snow to I-25, a lot in the mountains.

Forecast Discussion:

The big news is again an arctic invasion of very cold air. The front will sweep down the Plains mid-Saturday afternoon (Figure 1). Sunday and Monday will have highs hovering around 10F (maybe only single digits). The very cold air will be shallow and will not be able to climb over the Rockies to the west (Figure 4).

There is some snow with possible periods of freezing rain or drizzle and/or sleet Saturday evening.  Another increase in snow chances occurs Sunday evening.  Some freezing precipitation may fall, off and on, through Monday midday. Most of the state will be seeing snow and winter precipitation on Sunday (Figure 2) with heavy snow in the north and northwest mountains. This shows up well on the weather5280 forecasters map (Figure 3). He has a Trace to 2 inches along I-25 south of Loveland and 2-4 inches total just to the west of the interstate and up in Fort Collins. Snowfall is impressive to the northwest in the mountains!  This same pattern is visible in the GFS snowfall map (Figure 5). I didn't go with the 15:1 snowfall ratios since we should see more of the snow before the very cold air is in place.

 

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Figure 1: the 10 day graphical forecast for Denver from weatherunderground.com
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Figure 2: the NWS surface forecast map for Sunday.
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Figure 3: the storm snowfall total forecast from the forecasters at weather5280.com
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Figure 4: the surface temperature anomaly map for Monday noon from the GFS and weather5280
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Figure 5: the 60 hour snowfall (10:1 ratio) forecast from the GFS and weather5280com

The Longer Range Forecast:

The cold air begins to slosh off to the east on Tuesday but we don't see 40's return until Friday (Figure 1) and no additional notable snowfall over the next 10 days except up in the mountains (Figure 6).

figure6_01282023
Figure 6: the 10 day snowfall (10:1 ratio) forecast from the GFS and weather5280com

 


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

Sunny

Sunny

94°F

UV Index
5 Moderate
Pressure
30.19 Falling
Visibility
8 miles
Dewpoint
45 °F
Humidity
18%
Wind
E 3.4 mph
Gust
8.3 mph
Wind Chill
94 °F

Hourly Forecast

Today
4 PM
93°F
Mostly cloudy
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5 PM
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6 PM
91°F
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7 PM
88°F
Cloudy
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8 PM
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81°F
Partly cloudy
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10 PM
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11 PM
72°F
Partly cloudy
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12 AM
70°F
Partly cloudy
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1 AM
69°F
Partly cloudy
Tomorrow
2 AM
68°F
Partly cloudy
Tomorrow
3 AM
66°F
Partly cloudy

7 Day Forecast

Mostly cloudy w/ showers

Sunday

93 °F

Thickening clouds with a passing shower this afternoon


Partly cloudy

Sunday Night

64 °F

Partly cloudy


Mostly cloudy w/ t-storms

Monday

95 °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

92 °F

Intervals of clouds and sunshine


Partly cloudy

Tuesday Night

60 °F

Partly cloudy


Partly sunny w/ t-storms

Wednesday

84 °F

Times of sun and clouds with a thunderstorm in the afternoon; thunderstorms can bring hail and damaging winds


Mostly cloudy

Wednesday Night

58 °F

An evening thunderstorm; otherwise, mostly cloudy


Cloudy

Thursday

81 °F

Cloudy with a thunderstorm in spots in the afternoon


Intermittent clouds

Thursday Night

58 °F

Partly cloudy


Sunrise and Sunset

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5:42 AM
Sunset
8:30 PM

Based on AccuWeather data