Why Hurricane Melissa’s intensity and slow-moving speed are a recipe for disaster

A strong hurricane is barreling towards Jamaica with anticipation that it is going to be the strongest storm to hit the Caribbean island in trendy historical past.

Hurricane Melissa started quickly intensifying over the weekend. It’s anticipated to make landfall early Tuesday morning in Jamaica, threatening to set off extreme flooding and catastrophic landslides, in accordance with the Nationwide Hurricane Heart (NHC). Not solely will the storm be sturdy, however its slow-moving tempo throughout the Caribbean will probably worsen its impacts.

Melissa can also be forecast to strike elements of Cuba and the Bahamas later this week. The U.S. is just not anticipated to be affected.

As of Monday night, Melissa was a Class 5 hurricane on the Saffir-Simpson Hurricane Wind Scale, which means sustained wind speeds can be 157 miles per hour or higher and catastrophic injury will happen. 

The prime minister of Jamaica, Andrew Holness, mentioned the nation has taken precautionary measures to reduce the impression of a Class 5 storm, similar to relocating residents to security and organizing restoration efforts.

“There isn’t a infrastructure within the area that may stand up to a Class 5,” he mentioned at a press convention on Monday.

Jamaica is predicted to be within the storm’s eyewall, which refers back to the band of dense clouds surrounding the attention of the hurricane. The eyewall usually produces the fiercest winds and heaviest rainfall, in accordance with Deanna Therefore, a professor of local weather, meteorology and atmospheric sciences on the College of Illinois Urbana-Champaign.

“Sadly for them, it seems to be like it should get essentially the most intense half,” she mentioned.

A part of the risk posed by Melissa lies in its depth mixed with its gradual tempo.

“When you will have a really slow-moving hurricane, it primarily signifies that one specific location will expertise all of these hurricane power impacts for an extended time frame,” Therefore added.

An analogous occasion befell in Texas in 2017. Hurricane Harvey’s gradual motion throughout the state unleashed greater than 50 inches of rain and resulted in at the very least 89 deaths.

The Nationwide Hurricane Heart forecasts that Melissa may dump as much as 30 inches of rain on Jamaica. In line with the Nationwide Climate Service, 18 to 24 inches of fast-moving rain can carry away most giant SUVs and vans.

One other concern is the island’s mountainous terrain, which might trigger heavy rainfall to select up velocity because it flows downhill, rising the chance of flash flooding and landslides.

In line with the NHC, jap Cuba may obtain as much as 20 inches of rain whereas the southeast Bahamas is forecast to see as much as 10 inches of rainfall. Elements of southwestern Haiti and the southern parts of the Dominican Republic are additionally prone to flash flooding and landslides.  

Hurricane season is underway, however local weather change can also be making bigger, extra highly effective storms extra frequent. Analysis means that slow-moving tropical storms have turn into extra frequent over the previous a number of a long time.