Mike Cycle

Observer Pyle made a remark about the station move on the January 1946 record. Then there is a record gap through to October 1948, when the first PECO observation record appears. I don't know if this is a real gap. During the same time, observer Pyle is also taking stream gage measurements. The earliest address is shown as 547 E. Main, across from the high school, but observer Gordon owned 574 E. Main, and there is no 547 E. Main on current mapping. https://arcweb.chesco.org/LR_INFO/lr_info.aspx?PARID=1606 03640000

Hi All, occasional lurker and Chester County resident here. I have done a deep dive on Coatesville 1 SW's history, working through the 530-1, the monthly paper records and property deeds for observers Gordon, Pyle and PECO. I then compared the record of station changes with the breakpoints identified by NOAA/NCEI and Berkeley Earth Surface Temperature (BEST). Claude helped with the graphic. There is remarkable agreement between the history of changes at 1 SW and the breakpoints detected. edit: The HOMR record for this station, (presumably pulled from the 1956 530-1 (itself likely pulled from the B44s)) is flawed.