Originally Posted by Oneiric 3
MT, Attached (I hope) are the ECMWF monthly (from 1900 to 2010) reanalysis data from the Toronto region (not sure if the coordinates are exactly right for the actual station. Will take a look at this data myself later on to compare to the actual recorded data in your sheets, but for now, thought you might like to take a look:
Data is generated from this site and edit: anomalies in the 'anom' sheet are based around the rather curious 79-10 averages that Climate Reanalyzer uses.
I had a look at the raw data, turns out to be somewhat colder in general for January, their mean for the 111 years sampled was -7.6, the data average -4.7 and adjust to -5.5 after urban heat island removed.
The warmest January (1932) was 1.9 in raw data, 1.3 adjusted and -0.6 in their data set. A recent very cold January (1994) was -10.0 (-11.1 adjusted) and the data set gives -12.2.
So they seem just about perfect for a non-urban point in the general area somewhat further inland from Lake Ontario, I would imagine all of those data points would fit actual readings made in a farmer's field 10 miles outside the suburban limits. I haven't looked at other months or their anomalies.
I would say they are safe to use for any purpose, not sure what to say about a 1979-2010 base for anomalies, it can't be all that different from 1981-2010. Why do the data sets end in 2010?
Meanwhile if anyone is correcting their downloaded data sheets, relatively good news on the ranking quality control, I did that task and found only one other suspect rank, cell EG1941 (which refers to raw data for Sept 1939) got a bad edit somewhere and went from t-86 to t-7 (to be clear it should be t-86 or 86 inside a grey highlight box). Probably the same rigamarole as with the other egregious error. So that one can be changed manually and it will result in a couple of other cells changing. Once again, all data in tables and other places in the excel file remain valid for that month. I suspect it's an edit error because the colour code was right in the template of temperature anomaly groups by thirds.
No other monthly ranks are mismatched with either the temperature series or the other ranking table now.
If this does not concern you enough to bother changing it, the next edition will of course have that error corrected, and I now have a q.c. table installed to monitor for any unseen changes in the future.
In recent weather news, March 11 set a record at Toronto (66 F) and March 26 set a record at NYC (82 F) and there are several other new records at both locations for tied or new high mins. The month will end up around 20th warmest at both locations, raw data and 30th adjusted. There will be only traces of snow which is below the March average for both locations but not all that unusual for mild cases.