Two hurricanes have never appeared in the Gulf of Mexico at the same time, according to records going back to at least 1900, said Colorado State University hurricane researcher Phil Klotzbach.
The impacts of wind shear as evident on the satellite and radar images of Marco, where the clouds and rain with it are removed and east of the center of circulation, leaving an exposed a greatly thunderstorm-less center swirl.
Laura became a Category 3 storm earlier Wednesday and quickly reached Category 4 status.
Forecasters said that while atmospheric conditions were favorable for Laura to grow, its passage over the mountains of Haiti, the Dominican Republic and Cuba could tear it apart or weaken it before it entered warm Gulf of Mexico waters conducive to growth.
"In the past 24 hours, the tracks of these two storms have changed dramatically and in a way that is unfavorable for our state", Edwards said.
In the potential target zone for both storms is New Orleans, which was devastated by Hurricane Katrina nearly exactly 15 years ago."There is still plenty of uncertainty", said Bradley Harvey, a meteorologist with the commercial forecaster Maxar.
A hurricane watch was issued for the New Orleans metro area, which Hurricane Katrina pummeled in August 2005. That's the biggest news coming out of the 11 p.m. Monday advisory on the storm after making landfall on the state near the mouth of the Mississippi River earlier today. "Anywhere along the Gulf of Mexico has a potential threat from this". Hundreds of thousands were without power in the Dominican Republic, as both countries on the island of Hispaniola suffered heavy flooding.
Laura became the 12th named storm of the 2020 hurricane season in the Atlantic Ocean Friday morning, and Marco became the 13th named storm Friday night.
The bigger threat the storms pose to energy markets is flooding once they come ashore.
Officials in the Florida Keys, which Laura might pass over, declared a local state of emergency and issued a mandatory evacuation order for anyone living on boats, in mobile homes and in campers.
"We are in unprecedented times", Mississippi Gov. Tate Reeves said at a news conference Saturday as he declared a state of emergency.
Meanwhile, Tropical Storm Marco formed over the Northwestern Caribbean late Friday night.
"If Laura also takes a track toward the Louisiana coast as forecast, power crews may not even be able to go to some areas", said AccuWeather Senior Meteorologist Dan Pydynowski.
"Everybody in coastal Louisiana needs to be paying attention to these storms", he said.