Review of winter 2014/5 indicators.
1.ENSO.
Latest diagnostic discussion from NOAA suggests a weak El Nino in range 0.5-1.0.Overall El Nino's tend to be followed by warmer than avewrage winters with the link getting stronger for the higher El Nino levels.Weak El Ninos return 50.50 for the following winter.
On balance I would say the ENSO signal points to a warmer than average winter.
2.QBO
Last year had avery long and very strong +ve QBO and was followed by a strong NAO and warm winter.However the record of the link between QBO and winter CET is patchy.For what its worth the QBO is now in negative phase (-19) which points to below average winter temps.
3.SST's
I always find the pattern (May/June) difficulkt to ineroret but there didn't seem to be the clear tripole which links to NAO-ve winters.Verdict therfor ethat SSt,s favour a warmer than average winter.
4.Sunspots
The solar cycle peaked in fenb 2104 at 102.6 and is now falling away at 72.5 in July.The only real verifiable link to lower than solar cycleaverage CET is around the solar minimum(University of Reading studies).So little influence likely at this stage of the solar cycle.
5.Model predictions
Meto has for its 3 month Dec,Jan,Feb winter indicator above average temperature,,below average pressure and average rainfall.
CFS currently shows average temperature and pressure.
6.Seasonal predictors
Spring 2014 was a Very Warm wet season and summer is likely to finosh overall very warm and dry.Both of thes etypes tend to be follwed by warmer than average winters.
OVERALL PREDICTION
I would stick my neck out and simply say that winter 2014/15 is likely to be warmer than average.
Originally Posted by: roger63