Why do we always get this “x is a write-off” nonsense? Several recent op runs have shown the futility of trying to make a forecast more than a few days in advance yet still people can make guesses in reality pseudo-analysis about the weather nearly 4 weeks in advance. We can say what the weather is currently with very high confidence, what is very likely in the coming days with reasonable confidence and what may be probable in the next ten days or so.
Beyond then any claims of wintry blasts, snowmageddon, blow torches, weeks of zonality etc. are guesswork and should be called such. As this is the model output thread and the only models that go that goes out to the end of Jan are the CFS (no comment) and the ensembles (check out the uncertainties at that time scale) I think it’s safe to ignore such guesses if you are interested in what the models actually show.
What they actually show is a train of unsettled conditions (notably mild initially especially in the south) with weather from a westerly quarter, the potential for lots of rain (notably) in western parts and potentially damaging winds but massive uncertainty in the specific details. What they do not show is that it is safe to write of January whatever that means. And no Sean there is no SSW likely in the immediate future as far as I can see and any PV displacement lies in the realms of FI and guesswork too.
Originally Posted by: doctormog