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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 25, 2019

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

In Brief:

Very nice weather continues through Sunday midday with a slight chance of an afternoon shower moving off the mountains most days. Things get wetter and cooler Sunday night and into next week.

Forecast Discussion:

We're at our first broken record post of the Spring. We do have a weak front pushing into the state Thursday morning (Figure 1 - thin blue line). It will cool us down about 5-8 degrees over Wednesday's high temperature. This will also give us just a bit better moisture source and a focus for afternoon thundershowers to form in. Still - they won't give anyone. except a lucky few neighborhoods. any significant rain (Figure 2).

The Longer Range Forecast:

The mountains see daily shower activity while we remain mostly dry and warm on the Plains. Figure 3 shows the rainfall total through midday Sunday. I-25 looks like it is singled out for no rainfall. (My kids would say "no fair.") The more distant plains will see some showers.

The next major change comes Sunday afternoon with a cool down and rainfall chances increasing a lot (Figure 2). The (fantasy?) rainfall total forecast from the GFS gives us 1.5-2 inches of rain over the next 10 days. Do not start placing bets on this yet.

Figure 1: The forecast surface map for Wednesday PM from NCEP.
Figure 2: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 3: the forecast accumulated precipitation map from the GFS and weather5280.com for Colorado through Sunday noon.
Figure 4: the forecast accumulated precipitation map from the GFS and weather5280.com for Colorado,over the next 10 days.

Current Weather

Clear

Clear

58°F

UV Index
0 Low
Pressure
29.39 Falling
Visibility
7 miles
Dewpoint
32 °F
Humidity
37%
Wind
SSE 5.1 mph
Gust
11.4 mph
Wind Chill
58 °F

Hourly Forecast

Today
3 AM
52°F
Cloudy
Today
4 AM
51°F
Cloudy
Today
5 AM
50°F
Cloudy
Today
6 AM
48°F
Cloudy
Today
7 AM
47°F
Cloudy
Today
8 AM
49°F
Cloudy
Today
9 AM
51°F
Cloudy
Today
10 AM
53°F
Cloudy
Today
11 AM
54°F
Cloudy
Today
12 PM
55°F
Cloudy
Today
1 PM
55°F
Cloudy
Today
2 PM
55°F
Cloudy

7 Day Forecast

Intermittent clouds

Sunday

76 °F

Warmer with intervals of clouds and sunshine


Mostly cloudy w/ showers

Sunday Night

47 °F

Turning cloudy; windy late with a stray shower


Windy

Monday

55 °F

Winds gusting past 40 mph; cloudy and cooler


Windy

Monday Night

42 °F

Very windy this evening; partly cloudy


Partly sunny w/ showers

Tuesday

59 °F

A couple of showers in the morning; otherwise, windy and cool with times of clouds and sun


Partly cloudy

Tuesday Night

32 °F

Partly cloudy


Intermittent clouds

Wednesday

60 °F

Times of clouds and sun


Intermittent clouds

Wednesday Night

38 °F

Partly cloudy


Intermittent clouds

Thursday

56 °F

Cool with times of clouds and sun


Cloudy

Thursday Night

39 °F

Cloudy


Sunrise and Sunset

Sunrise
5:54 AM
Sunset
8:00 PM

Based on AccuWeather data