*Season goes from December to March*
*ENSO Strenth based off Oceanic-Nino Index*
Colors: Red= Warm or Postiive Phase, Blue= Cold or Negative Phase, Green= Neutral Phase
| Philadelphia, PA | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Snowfall | Climate Pattern Season Average | |||||||||
| NAO | PNA | AO | PDO | EPO | ENSO | ||||||
| SOI | Nino 3.4 | Strength | |||||||||
| 1972/1973 | 0.0" | 0.345 | 0.057 | 0.948 | -0.48 | 0.20 | -7.0 | 1.51 | Strong El Nino | ||
| 2019/2020 | 0.3" | 1.202 | -0.515 | 2.083 | -1.16 | N/A | -2.9 | 0.54 | Weak El Nino | ||
| 1997/1998 | 0.8" | 0.047 | 0.950 | -0.647 | 1.27 | 0.40 | -20.1 | 2.03 | Strong El Nino | ||
| 1950/1951 | 2.8" | -0.315 | -0.640 | -1.086 | -1.32 | 0.33 | 11.9 | -0.63 | Weak La Nina | ||
| 2011/2012 | 3.7" | 1.345 | 0.455 | 0.751 | -1.27 | 1.30 | 9.5 | -0.74 | Weak La Nina | ||
| 2001/2002 | 4.0" | 0.350 | -0.160 | 0.566 | -0.43 | 0.28 | -1.0 | -0.09 | Neutral | ||
| 1991/1992 | 4.7" | 0.5675 | 0.702 | 1.607 | 0.28 | 0.10 | -18.9 | 1.63 | Moderate El Nino | ||
| 1958/1959 | 5.1" | -0.260 | -0.055 | 0.069 | 0.04 | 0.46 | -5.2 | 0.58 | Neutral | ||
| 2007/2008 | 6.3" | 0.510 | 0.000 | 0.791 | -0.76 | 0.94 | 15.5 | -1.47 | Moderate La Nina | ||
| 1956/1957 | 7.9" | 0.000 | -0.397 | -0.365 | -0.94 | -0.82 | 3.2 | -0.07 | Neutral | ||