Hurricanes and Physics

IRMA AND JOSE

Why do hurricanes or typhoons move counter clock wise in the Northern Hemisphere, and Clockwise direction in the southern hemisphere?

the above is the current state of the two hurricanes as of 1:20 pm EST.

When i was young i never ever understood pseudo forces. It did not make sense to me at all! why would they make up ‘fictitious forces’!

Well, now I know why !! Because the rotation of the earth!

earth rotates from west to east (the sun first rises in the east!, right?) so if you imagine looking down from the north pole: We see it first rises in New Delhi and then in Washington DC. DC has to “catch up” it has to go to New Delhi. So west to east!

Because of this rotation – any wind rising up near the equator (the air is warmer and it is lighter- so it rises up) is “pulled” in the direction of rotation . that is makes like pulled pork! Pulled wind is like pulled pork. Tasty and dangerous!

pulled wind

If Earth did not rotate as it does, we would have high-speed winds of almost 480 km/h (about 300 mph) gusting from the poles to the Equator and back!!

this force is called the Coriolis Force

 

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