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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 6-7, 2019

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

Forecast Discussion:

We saw some high-based showers move by Friday PM. I don't think Longmont even saw a sprinkle (Berthoud may have been splashed briefly). Today (Saturday) will be very much the same. [Correction, we got a bit of real rain around 9pm, after I wrote this!] You can see showers on the western slopes in the late afternoon today (Figure 1) with very small chances of precipitation in the late afternoon (Figure 2). Some thunder is possible given the cold air aloft. Overall, we are dry and getting warmer and warmer.

Because readers of this column are probably outside playing this weekend, and things are so quiet, I'll pick it up again Monday when we can set our sights on the next storm better.

The longer range forecast:

By Monday PM we are some 20F above average (Figure 3). Wonderful temperatures.

We've been seeing thata big change coming mid-week for a few days now (Figure 2). The GFS (that has often over predicted precipitation this far out) gives us about 1/4th an inch of water over the next 10 days (but 1 inch amounts are in the nearby foothills -Figure 4). The GFS DOES give us a coating to 1 inch of snow over the next 10 days - so we are probably not done with winter-like weather yet. More on Monday!

Figure 1: The forecast surface map for Saturday PM from NCEP.
Figure 2: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 3: The forecast temperature departure from normal map from the GFS and weather5280.com for Colorado, Monday PM.
Figure 4: the forecast accumulated precipitation map from the GFS and weather5280.com for Colorado, over the next 10 days.
Figure 5: the forecast accumulated snowfall map from the GFS and weather5280.com for Colorado, over the next 10 days.

Current Weather

Light rain

Light rain

39°F

UV Index
0 Low
Pressure
29.96 Rising
Visibility
8 miles
Dewpoint
38 °F
Humidity
95%
Wind
NNW 0.6 mph
Gust
1.7 mph
Wind Chill
39 °F

Hourly Forecast

Today
9 AM
42°F
Cloudy
Today
10 AM
46°F
Mostly cloudy
Today
11 AM
49°F
Mostly cloudy
Today
12 PM
52°F
Cloudy
Today
1 PM
55°F
Cloudy
Today
2 PM
57°F
Cloudy
Today
3 PM
58°F
Thunderstorms
Today
4 PM
59°F
Mostly cloudy
Today
5 PM
61°F
Mostly cloudy
Today
6 PM
59°F
Mostly cloudy
Today
7 PM
57°F
Intermittent clouds
Today
8 PM
53°F
Mostly cloudy w/ t-storms

7 Day Forecast

Thunderstorms

Sunday

61 °F

Mostly cloudy and warmer with a thundershower in spots


Partly cloudy w/ t-storms

Sunday Night

37 °F

An evening thunderstorm in parts of the area; otherwise, partly cloudy


Partly sunny

Monday

70 °F

Partly sunny, pleasant and warmer


Intermittent clouds

Monday Night

43 °F

Partly cloudy


Mostly sunny

Tuesday

73 °F

Mostly sunny and pleasant


Mostly cloudy

Tuesday Night

41 °F

Mostly cloudy


Intermittent clouds

Wednesday

65 °F

Times of sun and clouds with a passing shower in the afternoon


Intermittent clouds

Wednesday Night

39 °F

A thundershower in spots in the evening; otherwise, partly cloudy


Rain

Thursday

49 °F

Chilly with rain and drizzle


Partly cloudy

Thursday Night

28 °F

Partly cloudy


Sunrise and Sunset

Sunrise
6:03 AM
Sunset
7:53 PM

Based on AccuWeather data