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Wintry January 21-23 2025

not super concerned about the gfs, especially if the ensembles are fine, but this holdout is a bit curious to me
I'm pretty certain that bias WebberWeather noticed on how it handles cold air on the Rockies is partly to blame here. I mean that run had the jet stream well east of the Rockies that go around ...
 
I'm pretty certain that bias WebberWeather noticed on how it handles cold air on the Rockies is partly to blame here. I mean that run had the jet stream well east of the Rockies that go around ...
webb is elite at finding little nudges like this, helps his operational forecasting is in NM here
Not curious to me anymore. Par for the course. Never expect anything diff from it. Learned years ago
it is still a fine enough weather model that will have accurate and inaccurate periods. while i'm skeptical of the holdout the solution is in the back of my mind
 
The Canadian has been steadfast in showing a big winter storm. I suspect this is because the pattern isn't as complicated as some of the more typical conditions we often see with these things.
 
132

Good Lord some monsters
 
CMC is an absolute nightmare for the SE. round after round of winter precip of significant portions. This will shut down the SE for a while if it were to play out that way
It would be a absolute dream for me and I have to get out and work in it. We had this stuff happen in the 80s and 90s and we're still hear to talk about it.
 
The Canadian has been steadfast in showing a big winter storm. I suspect this is because the pattern isn't as complicated as some of the more typical conditions we often see with these things.
I'm starting to wonder if part of the reason the CMC is picking up on the storm despite wildly different H5 solutions is because it often does a better job of recognizing cold air masses and the baroclinicty associated with them. The GFS does not look correct with this and is probably one reason it is missing out on the isentropic upglide associated with this event. This is just a theory, but you can see below during the heart of the Canadian event what a difference there is.
gem-all-namer-t2m_c-7547200.pnggfs-deterministic-namer-t2m_c-7547200.png
 
I'm starting to wonder if part of the reason the CMC is picking up on the storm despite wildly different H5 solutions is because it often does a better job of recognizing cold air masses and the baroclinicty associated with them. The GFS does not look correct with this and is probably one reason it is missing out on the isentropic upglide associated with this event. This is just a theory, but you can see below during the heart of the Canadian event what a difference there is.
View attachment 163998View attachment 163999
Yep, I don't disagree. That makes sense.
 
I'm starting to wonder if part of the reason the CMC is picking up on the storm despite wildly different H5 solutions is because it often does a better job of recognizing cold air masses and the baroclinicty associated with them. The GFS does not look correct with this and is probably one reason it is missing out on the isentropic upglide associated with this event. This is just a theory, but you can see below during the heart of the Canadian event what a difference there is.
View attachment 163998View attachment 163999
And that the GFS develops a Lee side Rockies Low in Colorado spuriously and flooded Texas and OK with strong southerly flow...
 
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