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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)