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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – April 20, 2019

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

Forecast Discussion:

Today will be one of the warmest days in the last 5 months - even if breezy at times (Figure 1). We should break 80F - but the record for today seems to be 88F. That record should be safe.

Easter Forecast: The storm system is still moving towards us in the morning Sunday for sunrise services (Figure 2). The temperatures at sunrise (about 6:14am) should be 48F with skies at about 50% cloud cover. Winds will be about 3-5mph from the NW. (Figure 1)

The rain should form quite quickly around 12pm to 1pm. We are down to about 3/4th of an inch of rain Sunday through Tuesday AM.

The longer range forecast:

The GFS has dropped the rainfall total to about 3/4th of an inch as well (Figure 3). The rainfall should have more breaks in it at times.

Figure 4 - the NAM gives us about 1/2 or a bit less (up to Monday evening only). The GEM (Figure 5) up through Monday PM is more generous at about 3/4th of an inch again.

For snowfall (Figure 6 - the GFS) - it remains up in the mountains except near Cheyenne, the western suburbs of Denver and Boulder and the Palmer Divide.

Further out - we warm to the 60'sF and 70'sF on into the new week. More later! Happy Easter everyone.

Figure 1: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 2: The forecast surface map for Saturday PM from NCEP.
Figure 3: the forecast accumulated precipitation map from the GFS and weather5280.com for Colorado, through Wednesday night.
Figure 4: the forecast accumulated precipitation map from the NAM and tropicaltidbits.com for Colorado and areas east and south, through the next 3.5 days.
Figure 5: the forecast accumulated precipitation map from the GEM and tropicaltidbits.com for Colorado and areas east and south, through the next 3.5 days.
Figure 6: the forecast accumulated snowfall map from the GFS and weather5280.com for Colorado, through Wednesday night.

Current Weather

Cloudy

Cloudy

37°F

UV Index
1 Low
Pressure
30.24 Falling
Visibility
4 miles
Dewpoint
31 °F
Humidity
78%
Wind
E 2.8 mph
Gust
5.4 mph
Wind Chill
35 °F

Hourly Forecast

Today
4 PM
38°F
Cloudy
Today
5 PM
38°F
Cloudy
Today
6 PM
39°F
Cloudy
Today
7 PM
39°F
Cloudy
Today
8 PM
39°F
Cloudy
Today
9 PM
39°F
Cloudy
Today
10 PM
39°F
Cloudy
Today
11 PM
38°F
Cloudy
Tomorrow
12 AM
38°F
Cloudy
Tomorrow
1 AM
37°F
Cloudy
Tomorrow
2 AM
36°F
Cloudy
Tomorrow
3 AM
35°F
Cloudy

7 Day Forecast

Rain and snow

Thursday

39 °F

Cloudy and much colder


Mostly cloudy

Thursday Night

34 °F

Mostly cloudy


Mostly cloudy w/ showers

Friday

47 °F

Chilly with some sun, then turning cloudy; a little rain in the afternoon


Rain and snow

Friday Night

33 °F

Periods of snow; rain mixed in early, accumulating an inch or two


Flurries

Saturday

43 °F

A bit of morning snow with little or no accumulation; otherwise, cloudy and chilly; storm total snowfall an inch or two


Intermittent clouds

Saturday Night

31 °F

Partly cloudy


Partly sunny

Sunday

69 °F

Pleasant and warmer with partial sunshine


Partly cloudy

Sunday Night

44 °F

Partly cloudy


Intermittent clouds

Monday

79 °F

Very warm with a blend of sun and clouds


Intermittent clouds

Monday Night

36 °F

Increasing clouds


Sunrise and Sunset

Sunrise
6:17 AM
Sunset
7:43 PM

Based on AccuWeather data