WPC 500-mb Height Preference
Displayed below is the WPC preferred 500-mb pattern (purple) every 12 hours from 36-84 hours and the spread of the
500-mb heights from the SREF. You can overlay the 500-mb pattern at the same valid times from the GFS, NAM, Canadian,
UKMET, SREF mean, and GEFS mean using the buttons above the loop.
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