. Just look at the recent fail, less then 10 days ago we were (if reading this forum) due a cold snowy east to northeast spell by now..
Originally Posted by: picturesareme
I'm not sure where you get that from, the easterly option was persistently shown but always at a very low chance - it did get as high as 25% at one stage, but was generally 10 to 15%. That's nowhere near enough to even begin getting excited and as far as I recall nobody did.
This time around it's the entirely typical post-97 situation whereby for most of us it's actually quite marginal. The models wax and wane, then from time to time you get a run which has large amounts of flipping even in the ensembles. The 12z GEFS isn't close to the worst flips (they have been known to happen even as close as 48 hours), but it's a good example of how a rock-solid cold spell (from 168 to 240 on the 6z) can be frittered away.
Sometimes it's the beginning of the end (as in 2009), other times it's just one of many wobbles (2010).
Time will tell in this case, but sufffice to say I've been rather cautious this time round, I've not talked to the local papers (as I did in 2010 to 2013 when snow was on the horizon), nor have I said much to the powers that be at work (which as it's a school is always keen to stay open).
I generally want a minimum of a full day+1 run of solid looking ensembles from ECM and GFS before I'll commit to it looking likely that a snowy spell is on the way - and that's not happened. Not yet, anyway!
It will get much colder than it's been recently, of course, but until I start seeing MOGREPS on board for say, Reading (safely away from any maritime gridpoints), I'll not get too excited.
MOGREPS can be seen here btw:
http://www.metoffice.gov.uk/public/weather/forecast/gcpk9yegm
Yup, that's the MetO site - it uses the MOGREPS median for the longer term bit of its forecasts, as far as I'm aware.
Edited by user
07 January 2016 18:25:45
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