Final weeks of historic hurricane season bring new storms

Residents clear debris from a flooded street in the shadow of the Guitar Hotel at Seminole Hard Rock, in the aftermath of Tropical Storm Eta in Davie, Florida. Photos / AP

Just when you thought it should be safe to go back to the water, the record-setting tropics are going crazy. Again.

Tropical Storm Eta is parked off the western coast of Cuba, dumping rain. When it finally moves again, computer models and human forecasters are befuddled about where it will go and how strong it will be.

Tropical Storm Theta — which formed overnight and broke a record as the 29th named Atlantic storm of the season — is chugging east toward Europe on the cusp of hurricane status.

The last time there were two named storms churning at the same time this late in the year was in December 1887, Colorado State University hurricane researcher Phil Klotzbach said.

But wait there's more. A tropical wave moving across the Atlantic somehow survived the mid-November winds that usually decapitate storms.

The system now has a 70 per cent chance of becoming the 30th named storm. That's Iota on your already filled scorecard. If it forms, it is heading generally towards the same region of Central America that was hit by Eta.

Tropical Storm Eta in the Gulf of Mexico, Theta, right, and a tropical wave to the south that forecasters say has a good chance of becoming Tropical Storm Iota. Photo / NOAA, AP

Never before have three named storms been twirling at the same time this late in the year, Klotzbach said. Hurricane records go back to 1851, but before the satellite era, some storms were likely missed.

"Someone didn't give the tropics the memo that its mid-November. This map doesn't look normal," said University of Miami hurricane researcher Brian McNoldy. "Usually by this time of year, the season is basically over. Now we've got the 28th, 29th and maybe 30th storm going on at the same time."

Generally fewer than one storm forms in the Atlantic hurricane basin in November but not this year, said Mike Brennan, branch chief for hurricane specialists at the hurricane centre.

For the moment, the biggest threat and biggest conundrum is Eta, which struck Nicaragua as a Category four hurricane, killing more than 100 people from Mexico to Panama. By today, it was lingering just north of the Yucatan Channel between Cuba and Mexico, with top winds of 95 km/h.

Eta continued to swell rivers and flood coastal zones in Cuba. Some 25,000 people were evacuated with no reports of deaths, but rainfall continued, with total accumulations of up to 63cm predicted.

Victoria Rodriguez, left, and Angela Mojica, right, walk on a flooded street in Davie.

The rain kept falling in South Florida, where as much as 58cm were expected to accumulate. Eta barely hit land on Moday as it blew over Lower Matecumbe Key on its way into the Gulf of Mexico, but the storm dumped water over densely populated neighbourhoods from Monroe to Palm Beach counties. McNoldy has logged more than 230cm of rain at his Miami house this year, a record.

"Once the ground becomes saturated, there's really no place for the water to go," Fort Lauderdale Mayor Dean Trantalis said.

"Now I have fish in my yard and everything, it's rough," Davie resident Troy Rodriguez said.

The problem with forecasting Eta is the lack of steering currents that push or pull a storm. Eta's ultimate track depends on how strong it gets because weaker and stronger storms are steered by different parts of the atmosphere, scientists said.

A school bus drives through the flooded parking lot of the Broward School District Central Depot in Oakland Park, Florida.

A report from the National Hurricane Centre included the line that forecasters have "little confidence in the long-range track forecast".

The map of computer model tracks for Eta looks like a "squashed spider," Klotzbach said, referring to the many outstretched lines that trace its possible movement.

The weaker the storm is the more west it should spin after Friday, steered by lower-level winds. But if it's stronger, it is more likely to go north or northeast, directed by deeper winds, McNoldy said.

For now, the hurricane centre expects the system to go north, not showing a distinct turn, at least not quickly. The overall message is that everyone in the area should pay attention to Eta, Brennan said.

"The good news is in the short term, it's not going to move anywhere fast," Brennan said.

2020 would. https://t.co/FrpfXiSZjt

— Gizmodo (@Gizmodo) November 11, 2020

Past research has shown that hurricanes across the globe are moving slower and stalling more, perhaps due to man-made climate change, according to National Oceanic and Atmospheric Administration climate and hurricane scientist Jim Kossin.

So far this year, Eta, Zeta, Beta, Sally and Isaias stalled or slowed, but it is too soon to tell if there's any pattern, Brennan said.

When it made landfall in the Florida Keys, Eta was the fourth Greek alphabet named storm to hit the US. The others were Zeta, Delta and Beta.

You should read this. https://t.co/o9yFJh9kT5

— Christopher Flavelle (@cflav) November 10, 2020

The only thing this weird hurricane season lacked until now was a strange track.

Eta with its already odd turns, including moving southwest from Florida back to Cuba, a track that's an unusual reverse S-curve, now qualifies, Klotzbach said.

And if you think when hurricane season formally ends on November 30, this will all stop, that's not necessarily the case.

"We can certainly see activity bleed over into December," Brennan said. "We've seen it before."

- AP