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Lower-tropospheric Maps:
(1) Wind speed at 850 hPa
(2) Equivalent potential temperature at 850 hPa
(3) Total column water
(4) Relative vorticity at 850 hPa

All panels also show contours of:
Pressure at mean sea level (grey; interval = 5 hPa)
Instantaneous jet axes identified by maxima in wind speed on the 2 PVU surface


ECMWF Operational Analyses
Data is transformed to an F320 linear full Gaussian grid (longitude spacing 0.28125 deg)

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