Temperature and Snowfall Trends over the Past 12 Decades - 1900 to 2019 for Chester County PA

[ChescoWx]

So in analyzing completed decade data in the Chester County PA data set we see the following highlighted Trends.

• The Decade of 2010-19 was the 4th straight decade with increasing temperatures - which followed 4 straight decades of decreasing temperatures. Sounds kind of cyclical!  This decade was the warmest decade in the data set with the current decade outpacing the previous warm decade (1910-19) by an average of 0.22 degrees or an increase of 0.4%
• This was also the snowiest decade on record besting the previous all-time snowiest decade with an average of 45.5" of snow per year. This eclipses the previous snowiest decade of 1900-1909 by 0.4 inches or 0.8% increase from the previous snowiest decade.
• Interesting to note that the coldest decade 1970-79 recorded the least average snowfall while the warmest decade 2010-19 saw the most snow.
• What will the future changing climate bring us?

 

 

[hazwoper]

Pretty cool, Paul.  How long have you been recording your own data?  I'd love to see how your records alone have looked over the entire time you have been collecting your own data at your current location.

Nice work.

[ChescoWx]

I have been recording my own daily data from East Nantmeal Twp since 12/1/03.

On another forum I was challenged on the validity of the data between multiple sites (albeit at the same elevation) So, to attempt to validate my data I started by first comparing 4 years of my daily data from 12/1/03 through 12/31/07 vs. the Final NWS COOP Observer at Coatesville 2W same relative elevation -  I came up with an average difference of an incredible 0.001 degrees 52.672 vs. 52.673 over 49 months of daily data (surprised myself how close!). I then took the daily readings from the KMQS Airport AWOS (see below) and compared to my observations for the 11 years from 2008-2018 - again almost the same. Finally I ran a statistical significance test with both data sets with the hypothesis they are the same - the result a p-value of less than >.005. So the data sets are statistically significantly the same data for the period of record. The things we do to prove a point!