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For discussion around the utility and verification, see: https://doi.org/10.1002/qj.3341www.ecmwf.int/en/newsletter/158/meteorology/new-product-flag-risk-cold-spells-europe-weeks-ahead
Extended Range Two-dimensional Regime diagram
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Extended Range Weather Regime Frequency histogram
Composites of 2-metre temperature for the 4 Euro-Atlantic regimes
NAO+, Scandinavian Blocking, NAO-, Atlantic Ridge
Drivers of predictability
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Wheeler-Hendon MJO diagram
Teleconnection patterns from MJO in ERA-Interim (lag 10 days)
After phase 3 (left) and phase 6 (right)
Sudden Stratospheric Warmings (SSW)
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