| Oct 2011 to Mar 2012 | Apr 2012 to Sep 2012 | Oct 2012 to Mar 2013 | Apr 2013 to Sep 2013 |
| nve ONI (coiling) | pve ONI (warm) | nve ONI (cooling) | nve ONI (cooling) |
| pve SOI (cooling) | nve SOI (warm) | pve SOI then nve SOI (cooling then warm) | pve SOI (cooling) |
| pve NAOI (stronger winds, high pressure gradient, stronger storms) | nve NAO1 (lighter winds, fewer weaker storms, westerlies) | pve NAOI (stronger winds, high pressure gradient, stronger storms) | pve NAOI (stronger winds, high pressure gradient, stronger storms) |
| nve QBOI (easterly winds, warm) | nve QBOI (easterly winds, warm) | nve QBOI (easterly winds, warm) | pve QBOI (westerly winds, cooling) |
| pve AOI (cooling/strong winds) | pve AOI (cooling/strong winds) | nve A0I (warm/light winds/low pressure) | pve AOI (cooling/strong winds/High pressure) |
| CMF+ decrease (cooling) | CMF+ decrease (cooling) | CMF decrease (cooling) | CMF decrease (cooling) |