The probabilities for the below, near or above normal tercile categories are shown for various lead times, ranging from months 1-7 for monthly forecast period and from quarter 1 to 5 for seasonnal forecast (next three month). Parameters displayed oare

• Land/Sea Temperature
• Maximum Temperature
• Minimum Temperature
• Temperature at 850hPa
• Zonal Wind at 850hPa
• Meridional Wind 850hpa
• Precipitation
• Sea Level Pressure

In each case, 6 maps are dispalyed for probilities :

• Probabilities for Below normal tercile
• Probabilities for Normal tercile
• Probabilities for Above normal tercile
• Probabilities for Highest Sextiles
• Probabilities for Lowest Sextiles
• Probabilities exceeding median

Anomalies maps and standard anomalies maps are also provided.

The probabilities (or chances) are generated from the Arpege Climate Systeme 5

More information abour Long Range Forecast and GPCs can be found here