US Anomaly: Sep 18th, 2010


Last week showed that most of the country was cooler than average and this week the reverse is true.  The northern part of the country had the cooler weather while a lot of the southern (especially central) portions were warmer than average.  Overall this is a week that would contribute to an above average temperature on a yearly scale, but not very much.  The anomaly is all still of the limited variety.  Nothing that is past the greater or less than 5°C that would indicate a much different than average temperature.

That will change as this is the last full week of summer. Summer is definitely the time with the least difference from normal temperatures. That is why it is the time of year that has shown the least warming from the natural cycles that are causing the current trend. With that in mind here is the map for the latest week.

Inconvenient Skeptic

Sep 18, 2010 US Temperature Anomaly

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The previous weeks show just how normal weekly changes are in the natural course of a year. There have been warmer and cooler than average weeks in the past four weeks.

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Inconvenient Skeptic

Sep 11, 2010 US Temperature Anomaly

Inconvenient Skeptic

Sep 4, 2010 US Temperature Anomaly

Inconvenient Skeptic

Aug 28, 2010 US Temperature Anomaly

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The comparable week for the past few years are even more interesting.  The last two years have been the exact opposite of the this week.  A much warmer northern part of the country with a cooler southern US.  2007 which had been having a string of warm weeks had a huge reversal from that series of warm weeks as the temperatures plunged in the northern parts of the US.  So 2007 and 2010 are comparable and then 2008 and 2009 are also comparable.  That is also interesting as this time of year in 2007 was also developing a strong La Nina in the Pacific Ocean.  So the years with the weather in common also are showing ocean oscillations in common.  This is something that I will be keeping an eye on as the year progresses.

Inconvenient Skeptic

Sep 19, 2009 US Temperature Anomaly

Inconvenient Skeptic

Sep 20, 2008 US Temperature Anomaly

Inconvenient Skeptic

Sep 15, 2007 US Temperature Anomaly

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As always the source of these maps is the NCDC.  (I also have to apologize for the color of the last map.  The upload keeps messing up the color on that one picture.)

Posted in US Temperature Anomaly by inconvenientskeptic on September 22nd, 2010 at 4:05 am.

1 comment

This post has one comment

  1. nice post. thanks.

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