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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.
If you see old images, try hitting the "Refresh" button, or closing your browser and reloading the page.
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