June 2017 Climate Forecast Discussion
Jun 2017 Climate Forecast Discussion for Jul-Sep through Oct-Dec
The SST forecast shows warmish but neutral ENSO conditions for Jul-Sep, remaining approximately steady through the fourth forecast season of Sep-Nov. A positive Indian Ocean Dipole is predicted to persist throughout the four forecast seasons, although the below-average SST off the west Indonesia coast weakens over the coming months. The tropical Atlantic maintains slightly above average SST during all four seasons.
Slightly enhanced probabilities for below-normal precipitation are predicted in parts of northern and central South America during Jul-Sep, shifting to mainly northern South America from Aug-Oct to Oct-Dec. An enhanced likelihood for below-normal is predicted for southeastern Australia during Jul-Sep, appearing more in northern Australia in Aug-Oct and Sep-Nov and weakening to climatology thereafter. A below normal tendency is also predicted for southern and western Indonesia from Jun-Aug to Aug-Oct, and for central Africa for Sep-Nov and Oct-Dec. A tilt of the odds toward above normal is forecast for western Africa for Jul-Sep and Aug-Oct, and for a portion of northern Asia during Sep-Nov and Oct-Dec.
A tendency toward above-normal temperature is predicted in varying portions of Africa, Australia, South America, south-central or southwestern Asia, southeastern Europe, the United States and Greenland during many of the four forecast seasons. Probabilities for above-normal are strongest in Greenland during all four forecast seasons, extending into northern North America from Aug-Oct through Oct-Dec. A tendency toward below-normal temperature is forecast in northern or northwestern North America during all four forecast seasons, southern Africa during Aug-Oct, and portions of northern Asia during Jul-Sep, Sep-Nov and Oct-Dec.
Citation
Kirtman, B., D. Min, J. Infanti, J. Kinter, D. Paolino, Q. Zhang, H. van den Dool, S. Saha, M. Mendez, E.
Becker, P. Peng, P. Tripp, J. Huang, D. DeWitt, M. Tippett, A. Barnston, S. Li, A. Rosati, S. Schubert, M.
Rienecker, M. Suarez, Z. Li, J. Marshak, Y. Lim, J. Tribbia, K. Pegion, W. Merryfield, B. Denis, and E. Wood,
2014: The North American Multimodel Ensemble: Phase-1 Seasonal-to-Interannual Prediction; Phase-2 toward
Developing Intraseasonal Prediction. Bull. Amer. Meteor. Soc., 95, 585–601, doi:
10.1175/BAMS-D-12-00050.1.
