Daily Mean Composites

NSSL/PSL Partnership Composite page: derived variables created on fly

Plot daily composites (averages) of the mean or anomalies (mean - total mean) of variables from the NCEP/NCAR Reanalysis and other datasets. Long term means (climatologies) are based on 1991-2020. Data is available from Jan 1948 to Nov 30, 2024 for most variables. Enjoy!

Variables Analysis level?
Enter Year, Month and Day for composites To subtract one set of days from another, use a minus sign (-) before the years of the days that are to be subtracted. Default is last available date for variable.
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OR to Enter Year of last day of range
OR File with Dates Optional Plot Label replaces list of dates.
Filename: Plot Label:
Days to add or subtract:
This number of days will be added (or subtracted) from all input dates. Please use all positive dates for input.
Color? Shading Type
Plot type? Mean Anomaly Climo
Scale Plot Size(%) Plot contour labels?No Yes
Vector Winds: Plot every nth arrow in x and y (default 2)
Override default contour interval ? Interval:Range: lowhigh
State boundaries: No Yes
Region of globe
If CUSTOM:
Enter lowest lat (-90 to 90) Highest lat
Enter western most longitude (0 to 360) Eastern most longitude
Choose projection for CUSTOM: Choose height range for CROSSECTION: to
error (Report Bugs)
This is a Research and Development Application