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Forecast Discussion:
The march of the pattern continues. Figure 1 shows high pressure still in place over us, but the entire west coast is getting in on the rainfall (and mountain snow) act. Watch for flooding and mud slides in the news, unfortunately. The ridge axis arrives and passes today making today the warmest day of the week and warmest day for a long time (I'm going to try to get my outside Christmas decorations up today!!) - Figure 2. The jet stream (pink arrow in Figure 2) has lifted far to the north of us with the ridge passage.
The longer range forecast:
Then it is downhill into the end of next week, and beyond. BUT it is not looking as cold or as wet/snowy in Longmont as it did just over the last couple of days of model runs (Figure 3).
The weatherunderground.com model only gives us 1-2 inches through the weekend.
The GFS gives us a coating to an inch through the next 5 days (Figure 4).
The NAM gives us a coating to 1.5 inches through the first half of the weekend (Figure 5).
And the super long range, 10 day totals, from the GFS (same as Figure 4) only gives us 2-3 inches at most. That is a big back-off from the models. We'll have to keep watching it, but maybe you can send back your Black Friday/Cyber Monday rider snow mobile??
