Skip to content

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

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

Forecast Discussion:

Extreme nice weather for today.  Calm winds, sunshine, and temperatures near 70F.  No need for a map on that... let's watch this next storm.

The longer range forecast:

Figure 1 shows the low gathering itself in southern Utah with a front down into AZ.  This is a touch further north, still, over previous forecasts.  That means warmer mid-storm temperatures. Figure 2 shows one low up in NW Colorado and a secondary low down in New Mexico.  We'll have a storm, but it won't be as wet or cold as it looked five days ago.

Figure 3 is the graphical forecast for Thursday through Sunday.  Rain chances begin around 8am Friday but the more persistent rainfall doesn't start until after 6pm.  Rain chances drop off late morning to around noon Saturday. You can see that temperatures don't drop below freezing during this storm, at all.

Figure 4 is the latest snowfall forecast.  Longmont may see a coating on the west side, but most of town won't get any measurable snow according to this.  Estes Park may still see 8-12 inches of snow though. For rainfall (Figure 5) we are up a bit over the forecast for yesterday at 0.25 to 0.5 inches of water.

Looking further out, we remain above freezing for the next 10 days (except for this morning). All model runs in the ensemble put precipitation down for the Fri/Sat storm.  Next week April 24-28 we see unsettled weather giving us chances of rain now and then.  Fertilize your law today if your sprinklers are still off.

Figure 1: The forecast surface map for Thursday PM from NCEP. Longmont is the pink dot.

Figure 2: The forecast surface map for Friday AM from NCEP. Longmont is the pink dot.

Figure 3: 4 days out of the 10 day graphical forecast for Longmont from weatherunderground.com

Figure 4: The GFS snowfall estimate between Wed PM and midday Saturday. Longmont is the pink dot.

Figure 5: The GFS precipitation estimate between Wed PM and midday Saturday. Longmont is the pink dot.

Figure 6: The 10 day graphical forecast from weather5280.com for Denver. Circled area is only morning we drop below (or approach) freezing (the blue line).

Current Weather

Sunny

Sunny

43°F

UV Index
3 Moderate
Pressure
30.02 Steady
Visibility
7 miles
Dewpoint
25 °F
Humidity
49%
Wind
SSE 3.2 mph
Gust
7.4 mph
Wind Chill
42 °F

Hourly Forecast

Today
9 AM
47°F
Mostly sunny
Today
10 AM
51°F
Mostly sunny
Today
11 AM
55°F
Mostly sunny
Today
12 PM
58°F
Mostly sunny
Today
1 PM
60°F
Partly sunny
Today
2 PM
62°F
Intermittent clouds
Today
3 PM
63°F
Mostly cloudy
Today
4 PM
64°F
Mostly cloudy
Today
5 PM
63°F
Cloudy
Today
6 PM
61°F
Cloudy
Today
7 PM
58°F
Mostly cloudy
Today
8 PM
55°F
Mostly cloudy

7 Day Forecast

Intermittent clouds

Thursday

64 °F

A blend of sun and clouds; breezy this afternoon


Mostly cloudy

Thursday Night

35 °F

Mostly cloudy


Partly sunny

Friday

68 °F

Increasingly windy with partial sunshine


Partly cloudy

Friday Night

38 °F

Partly cloudy


Partly sunny

Saturday

66 °F

Partial sunshine


Mostly clear

Saturday Night

41 °F

Clear to partly cloudy


Mostly cloudy

Sunday

78 °F

Rather cloudy and warmer; windy in the afternoon


Intermittent clouds

Sunday Night

43 °F

Partly cloudy; windy late


Mostly cloudy

Monday

60 °F

Mostly cloudy, breezy and cooler


Mostly cloudy

Monday Night

43 °F

Mostly cloudy


Sunrise and Sunset

Sunrise
5:58 AM
Sunset
7:57 PM

Based on AccuWeather data