#synopticchart

[sailabilityphi]

If the average air pressure at sea level =

1,013 millibars (mb)

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Understanding this synoptic chart (weather map)

Look NE of Hainan, there's less than 1,013 mb (numbers on the isolines)

= Low pressure area.

= Northern hemisphere Winds are turning counter-clockwise.

Lowest numbers 978mb is the eye or center of TS Chaba/ Caloy