The US autumn is off to a warm start. The past several weeks have had an unusual amount of above average temperatures. Most of the country was slightly above average last week. The actual temperatures show nothing is hot, just above average for this time of year.
The actual temperatures show that the temperatures are not high.
Anomalies of this scale are pretty normal for this time of year. The past few weeks are as follows.
The past few years have also had large anomalies for this time of year.
Not surprisingly it appears that 2010 is looking the most like 2007 when there was a La Nina forming in the Pacific ocean. For comparison here are 2010 and 2007 for the Sea Surface Temperature anomaly for the comparable weeks.
The La Nina forming this year is even stronger so the next few months will be really interesting in regards to the weather that the all the places around the Pacific are seeing from Australia to the United States. I am hoping to get some of this animated in the near future as well to make it easier to compare everything.