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The Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – March 19, 2018

This content was originally published by the Longmont Observer and is licensed under a Creative Commons license.

Forecast Discussion:

The storm is underway this Sunday evening.  I've had 1.5 inches of snow fall already - along with a good amount of rain beforehand. Rain changed to snow about 6:30pm - 1.5 hours earlier than I expected (but that is not TOO bad).

Figure 1 shows the snow and rain falling Sunday PM across the regions. Figure  2 shows that we have received about 0.2 inches of rainfall already.  The yellow dot is estimated at 2 inches of water.  Wow!

Figure 1: Radar Scope live radar view from around 9pm Sunday.

Figure 2: Radar Scope storm precipitation accumulation view from around 9pm Sunday.

The longer range forecast:

We'll have another ripple in the jet stream move over late today - so rain chances go up briefly before sunset.  Things get REALLY mild and nice until a very wet change arrives next Sunday through Tuesday and beyond.  We'll watch that all week!

Figure 3: The 10- day graphical forecast for Longmont from weatherunderground.com

Current Weather

Light rain

Light rain

55°F

UV Index
0 Low
Pressure
29.68 Steady
Visibility
7 miles
Dewpoint
44 °F
Humidity
67%
Wind
E 2.6 mph
Gust
6.9 mph
Wind Chill
55 °F

Hourly Forecast

Tomorrow
12 AM
53°F
Cloudy
Tomorrow
1 AM
52°F
Cloudy
Tomorrow
2 AM
51°F
Cloudy
Tomorrow
3 AM
51°F
Cloudy
Tomorrow
4 AM
50°F
Cloudy
Tomorrow
5 AM
51°F
Cloudy
Tomorrow
6 AM
51°F
Cloudy
Tomorrow
7 AM
52°F
Cloudy
Tomorrow
8 AM
56°F
Cloudy
Tomorrow
9 AM
59°F
Cloudy
Tomorrow
10 AM
63°F
Mostly cloudy
Tomorrow
11 AM
64°F
Mostly cloudy

7 Day Forecast

Mostly cloudy w/ showers

Thursday

72 °F

Turning cloudy, warm; an afternoon shower or two


Thunderstorms

Thursday Night

50 °F

Considerable cloudiness and mild


Thunderstorms

Friday

70 °F

Mostly cloudy with a couple of thundershowers


Thunderstorms

Friday Night

43 °F

Cloudy with a couple of thundershowers


Rain

Saturday

46 °F

Chilly with periods of rain and a thunderstorm


Rain and snow

Saturday Night

39 °F

Cloudy with rain, mixed with a little snow late


Mostly cloudy

Sunday

59 °F

Mostly cloudy and warmer


Partly cloudy

Sunday Night

36 °F

Partly cloudy


Partly sunny

Monday

71 °F

Partly sunny, pleasant and warmer


Partly cloudy

Monday Night

42 °F

Partly cloudy


Sunrise and Sunset

Sunrise
6:07 AM
Sunset
7:50 PM

Based on AccuWeather data