In Brief:
Still warm, some mountain snows, snow for everyone Friday.
Thursday update:
The forecasts quickly dropped all those high end snow totals mentioned below. This will be a chilly, windy storm with very little moisture.
Snowfall Round-Up for Longmont:
Weatherunderground: Tr-1"
Channel 7 news: 1.8"
Channel 9 news: 1.5"
NWS: <1"
Weather 5280.com T-1"
The GFS 0-0.5 inch.
The NAM 1.5-2.5 inches.
My forecast: 0-1 inch.
It's just not a big storm this time!
End Thursday update.
Tuesday update:
We continue with temperatures about 20F above normal until a cold front arrives overnight Thursday/Friday (Figure 1 update) . Pretty good snow chances in the low lands of I-25. Most models giving 1-3 inches of snow. Some (less used by me) models are jumping on 6 or 8 inch totals along I-25. I have low confidence of this but the snowfall round up will come out in a couple of days.
More details as the models (hopefully) come into agreement with each other!
End Tuesday update.
Forecast Discussion:
Upslope flow is giving the western slopes and higher mountains much needed snow. All we get is a view of clouds doubling the height of the Rockies, wind, and cool temperatures (Figure 1). A ridge returns to the West and we warm up to 20-25F above normal much of the week.
Over the next 5 days, the precipitation (moisture - Figure 3) and snow (Figure 4) falls mainly in the mountains.
The Long Range Forecast:
A new trough approaches Friday night/Saturday morning (Figure 2). We have a 'chance' of some snow from that system (Figure 1).
