Temperature Monitoring Station:
HATFIELD HYDRO PLANT

Monthly Mean Temperature Data

Raw Data relative to Expected Monthly Means

Difference from Regional Expectation

Breakpoint Adjusted Annual Average Comparison

Mean Rate of Change ( °C / Century )

Raw monthly anomalies		0.05
After quality control		0.05
After breakpoint alignment		0.94
Regional expectation during same months		1.05 ± 0.14
National average during same months		0.94 ± 0.10
Global land average during same months		1.06 ± 0.04

Regional Consistency

Comparison of monthly mean station data to regional expectation

	Typical Difference (°C, 95% range)	Correlation (R value)
Raw Monthly Anomalies	± 1.7	0.93
After Quality Control	± 1.7	0.93
After Breakpoint Adjustment	± 1.4	0.96

Quality Control Summary

Months missing 10 or more days	3
Serially repeated daily or monthly values	3
Extreme local outliers	0
Regional climatology outliers	0
Abrupt jumps	0
Marked as bad or manually changed by source	0
Exceeds global climatological range	0
Isolated observations	0
Frame shift repetitions	0
TMAX / TMIN inconsistency	0
TAVG outside TMAX / TMIN range	0
Total Observations Rejected by Quality Control	3

Station ID Codes

COOP	473471
COOP	475808
GHCND	USC00473471
GHCND	USC00475808
GHCNM	42500475808
NCDC	20021124
NCDC	20021132
NWS	HATW3
NWS	HTFW3
NWS	NEIW3
NWS	NELW3

ID codes may be repeated if the identification of the station changed during its history or if two different records were found to contain the same data, in which case the records would be merged.