Ensemble mean weekly anomalies

Forecast User Guide: Graphical Output#Weeklyanomaly-Extendedrangeforecast

z500 (North Pole projection)

z500 Howmoller diagram

Forecast User Guide: Graphical Output#HovmoellerdiagramorTime-Longitudesdiagram-Extendedrangeforecast

Mean-sea-level pressure

2-metre temperature

Total precipitation

Probability products

z500 Howmoller diagram

Forecast User Guide: Graphical Output#HovmoellerdiagramorTime-Longitudesdiagram-Extendedrangeforecast

Probability for lower tercile for 2-metre temperature 

Forecast User Guide: Graphical Output#Weeklyterciles-Extendedrangeforecast

Extended-range EFI and SOT for 2-metre temperature

Forecast User Guide: Extended Range - CDFs, EFI and SOT

Regime products

Forecast User Guide: Extended Range Regime Charts

For discussion around the utility and verification, see:  https://doi.org/10.1002/qj.3341

Extended Range Two-dimensional Regime diagram

Extended Range Weather Regime Frequency histogram

Drivers of predictability

Madden-Julian oscillation (MJO) index

Forecast User Guide: Madden-Julian Oscillation Output

Wheeler-Hendon MJO diagram

Sudden Stratospheric Warmings (SSW)

Reference for teleconnections: 

Plume of 10hPa zonal wind at 60N

Initial anomalies for SST/soil temperature