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500MB Vorticity, Height & Wind Image (500_vort_ht):
This product contains three fields:
Geostrophic Absolute Vorticity at 500 mb expressed as an orange contour at a value of 12; and as color fill for values from 16 to 40 in increments of 4. Also the symbol “X” is used for a vorticity maximum, and “N” is used for a vorticity minimum.
Note : This field is down-scaled from its original 1/4 degree resolution to half degree resolution to remove noise.
Isopleths as black lines expressing the height of the 500 mb level in decameters (dm) with an interval of 6 dm.