Philly Region Should Prepare For Hurricane Irma, Forecasters Say

Hurricane Irma poses "enough of a threat" to the Northeast that Pennsylvania and New Jersey should be prepared for whatever could come their way, the state's official climatologist says. Most models show the powerful storm turning north and east after striking Florida.

David Robinson, New Jersey's official climatologist, said the storm is acting much like Hurricane Donna in 1960, which struck Florida before bending to the north and east. By the time it got to the New Jersey and Pennsylvania region, it still had 110 mph winds.

"There is enough of a threat that we should be prepared," Robinson said.

Even if Irma doesn't directly hit the region and moves inland, he said, the storm will likely have some impact on the region, and remnants of Irma could produce tropical storm gales and have other impacts on New Jersey and Pennsylvania.

"My advice is that people should read Patch and pay attention to the weather forecast," Robinson said. "It could manifest itself with strong winds. It could manifest itself in heavy rains inland."

This hurricane season has become the most active in at least seven years, Robinson said. The last time there were three active hurricanes off the U.S. shores was 2010.

Robinson suggested that Irma poses a bigger threat to the Northeast than Jose, which is currently about 1,000 miles to the east of Irma. Robinson believes Jose will dissipate over the ocean or turn away from the coast. Hurricane Katia, meanwhile, is headed toward the Gulf of Mexico.

Watch: Deaths, Destruction Reported As Hurricane Irma Heads Toward Florida

Robinson said the Northeast's biggest worry would be if Irma turned to the north and east before it hit Florida. If it does, that would increase the likelihood of the storm having a major impact on the state.

Robinson said Irma's impact on New Jersey and Pennsylvania will likely come during the Tuesday-to-Thursday time frame.

Read more: Hurricane Irma:Latest Tracks, Storm Updates, Possible Regional Impacts

AccuWeather backed up that assessment, saying Irma has the potential to be a major event for the East Coast, according to Evan Myers, AccuWeather expert senior meteorologist and chief operating officer.

“It also has the potential to significantly strain FEMA and other governmental resources occurring so quickly on the heels of Harvey,” Myers said in a release.

Myers said Irma is likely to move up along the east coast of Florida, Georgia and South Carolina, so people from the Florida Keys all the way to Cape Hatteras, North Carolina, should prepare to be ready to evacuate coastal areas, starting with South Florida, Myers added.

At the very least, heavy rain is forecast to spread inland toward the southern Appalachians, potentially leading to extensive flooding due to the mountainous and hilly terrain. Damaging winds will become less of a concern the farther inland Irma moves. Some of Irma's rain may reach into the mid-Atlantic and Northeast toward midweek, according to AccuWeather.

There is a low chance that Irma completely misses the United States.

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