Dorian, which has dumped as much as 30 inches (76 centimeters) of rain on the Bahamas, was downgraded Tuesday morning to a Category 2 hurricane on the five-level wind scale
The hurricane, which was downgraded late on Monday morning to Category 4 on the five-step Saffir-Simpson Wind Scale
, was last over Grand Bahama, packing maximum sustained winds of 150mph (240kph) and moving at 1mph, the Miami-based National Hurricane Centre (NHC) said in an update at 2pm (1800 GMT).
Dorian was the strongest hurricane on record to hit the northwestern Bahamas as a life-threatening Category 5 storm on the five-step Saffir-Simpson Wind Scale
Dorian is a extremely dangerous category 5 hurricane on the Saffir-Simpson Hurricane Wind Scale
. Some fluctuations in intensity are likely, and Dorian is expected to remain a catastrophic hurricane during the next few days.
This category is a measure of a hurricane's power based of the Saffir--Simpson hurricane wind scale
in the Atlantic Ocean north of the equator, the Caribbean Sea, and the Gulf of Mexico.
Despite Dorian appearing to spare the United States a direct impact, the NHC warned the Category 5 storm on the five-step Saffir-Simpson Wind Scale
would lash millions from Florida to the Carolinas with strong winds and punishing surf.
Up until the 1980s, weather charts often contained a geostrophic wind scale
to help estimate wind speed.
It made landfall on Saturday, July 13 near Intercoastal City, Louisiana as a Category 1 hurricane on the Saffir-Simpson Hurricane Wind Scale
with maximum sustained winds of 75 mph (120 km/hr).
Recall cyclones Katrina in 2005 (Florida, USA), Haiyan in 2013 (Philippines), Irma in 2017 (Cuba), Mangkhut in 2018 (Philippines) and of course Idai and Kenneth this year.The intensity of cyclone wind speed and associated potential property damage are classified into five categories according to the Saffir-Simpson Hurricane Wind Scale
(It's 2 mph away from a Category 5 hurricane, the highest on the Saffir-Simpson Hurricane Wind Scale
.), it added
It can occur during any season of the year and at any time of the day, as did "Yolanda" when it attained Category 5 "super typhoon" accompanied by strong storm surges, on the Saffir-Simpson Hurricane Wind Scale
by the Joint Typhoon Warning Center (TWC), a joint US Navy US Air Force task force in Pearl Harbor, Hawaii.
Wind speeds are forecast to hit speeds as high as 53mph - a severe gale on the Beaufort Wind scale
- meaning there could be structural damage to buildings and high waves.