What does S and D mean on hurricane map?

What does S and D mean on hurricane map?

The letter inside the dot indicates the NHC’s forecast intensity for that time: D: Tropical Depression – wind speed less than 39 MPH. S: Tropical Storm – wind speed between 39 MPH and 73 MPH. H: Hurricane – wind speed between 74 MPH and 110 MPH. M: Major Hurricane – wind speed greater than 110 MPH.

What is the hurricane category scale?

Saffir-Simpson Winds Scale Ratings:

  • Category 1 hurricane = sustained winds of 74-95 mph.
  • Category 2 hurricane = sustained winds of 96-110 mph.
  • Category 3 hurricane = sustained winds of 111-129 mph.
  • Category 4 hurricane = sustained winds of 130-156 mph.
  • Category 5 hurricane = sustained winds of 157+ mph.

What was the most powerful hurricane to strike the US?

Katrina caused an estimated $108 billion in damage, making it the costliest hurricane ever to strike the United States. Andrew struck South Miami-Dade County in Florida and caused an estimated $26 billion in damage.

What is the most powerful hurricane in 2021?


2021 Atlantic hurricane season
Last system dissipated November 7, 2021
Strongest storm
Name Sam
• Maximum winds 155 mph (250 km/h) (1-minute sustained)

What does TD mean in a hurricane?

Depression or tropical depression (TD) Tropical storm (TS) Severe tropical storm (STS) Typhoon (TY)

What does SS mean in weather?

Typhoon warning. Visual storm signals. High sea bulletin. Coastal weather bulletin. Bulletin or cyclone warning bulletin.

What kills a hurricane?

Water is the No. 1 killer during a hurricane or tropical storm that strikes the U.S. – comprising nearly 90% of all tropical cyclone deaths – mostly by drowning in either storm surge, rainfall flooding or high surf, according to a 2014 study by Dr. Edward Rappaport, deputy director of the National Hurricane Center.

Where is Hurricane Alley in the USA?

Hurricane Alley is an area of warm water in the Atlantic Ocean stretching from the west coast of northern Africa to the east coast of Central America and Gulf Coast of the Southern United States. Many hurricanes form within this area.

What does CHC mean in weather?



How did the hurricane of 38 get its name?

Several families documented the destruction wrought by the Hurricane of ’38 with their home movie camera. Before the system of naming hurricanes was initiated during the early 1950s, tropical storms and hurricanes were often named with reference to the year of their occurrence and the area they devastated.

How many people died in the hurricane of 1938?

By 9 pm, the storm moved into Canada. It blew through Montreal and the province of Quebec and eventually expended itself in arctic Canada. Over 690 people lost their lives during the Hurricane of 1938, due in part to the poor forecasts.

How many homes were destroyed in the hurricane of 38?

Property damage was estimated at $400 million — over 8,000 homes were destroyed, 6,000 boats wrecked or damaged. The Hurricane of ’38 chronicles the lives of fishermen, residents and vacationers on the day before the storm, following their stories through one of the greatest natural disasters ever to befall the eastern seaboard.

Where did the Great Storm of 1938 happen?

In September of 1938, a great storm rose up on the coast of West Africa and began making its way across the Atlantic Ocean. The National Weather Bureau learned about it from merchant ships at sea and predicted it would blow itself out at Cape Hatteras, North Carolina, as such storms usually did.