Already smashing records, this year’s hyperactive Atlantic hurricane season is about to get even nastier, forecasters predict. In the coming months, they expect to run out of traditional hurricane names and see about twice as much storm activity as a normal year.
The National Oceanic and Atmospheric Administration on Thursday upped its seasonal forecast, now predicting a far-above-average 19 to 25 named storms — seven to 11 of them to become hurricanes and three to six of those to become major hurricanes with winds of at least 111 mph (178 kph). That’s a few more storms than the agency’s May forecast. The agency increased the chance of an above average hurricane season from 60% to 85%.
“It looks like this season could be one of the more active in the historical record,” but it’s unlikely to be beat 2005’s 28 named storms because the oceans were warmer and other conditions were more conducive to storm formation 15 years ago, said NOAA lead forecaster Gerry Bell.
This year’s forecast of up to 25 is the highest number NOAA has ever predicted, beating the 21 predicted for 2005, Bell said.
Colorado State University, which pioneered hurricane season forecasts decades ago, on Wednesday amped its forecast to 24 named storms, 12 hurricanes and 5 major hurricanes — all higher than their June forecast.
An average year, based on 1981 to 2010 data, is 12 named storms, six hurricanes and three major hurricanes. Lead Colorado State forecaster Phil Klotzbach said all the factors that cause hurricane seasons to be busy are dialed up, including increased storminess in Africa that seeds the biggest hurricanes, warmer water that fuels storms and reduced high level winds that kill storms.
In a normal year, about 90% of storm activity comes after August 6, with mid-August to mid-October as peak season. So far this year, there have been nine named storms, with most setting a record for being early. The most destructive so far has been this month’s Hurricane Isaias which killed at least nine people and left millions of people without power.
“Nine storms to this date is crazy,” Klotzbach said. Since 1995, when the Atlantic started a more active period for hurricanes, the average season has seen 12 named storms forming after August 5, he said.
The number of storms don’t matter as much as where they go, MIT meteorology professor Kerry Emanuel said, noting the busy 2010 hurricane season that barely touched the United States.
While the predictions are about the number of storms and don’t say where they strike, Klotzbach’s forecast says more storms increases the chance of another U.S. landfall. It says there’s a 74% chance that yet another storm will hit the U.S. coastline somewhere, with a 49% chance of a hit on the East Coast and Florida peninsula and a 48% chance of a hit on the Gulf Coast.
Most of this year’s storms so far have been weak, decapitated by high level winds and dry air, but Klotzbach said that’s about to change.
Sea surface temperatures in the eastern Atlantic are nearly 2 degrees (1 degree Celsius) warmer than normal. That not only provides more fuel for storms but changes air pressure and winds to make favorable conditions for storms to form and strengthen, he said.
You can see the NOAA’s release here. Just a reminder, 2005 was the fun year that brought us Hurricanes Katrina and Rita, among others. As noted, it’s not the number of hurricanes but where they go and what they do that really matters. Then again, the more hurricanes there are, the greater the chances that one will come your way. Who feels any confidence in Donald Trump’s FEMA to respond when that happens? Yeah. Stock up on supplies, have an evacuation plan just in case, and hope like hell these storms mostly blow out at sea.