In a statement Friday, the agency said the tornado produced estimated peak winds of 105 mph. A full damage survey remains underway.
The National Weather Service also said survey teams are assessing storm damage in Downingtown, Pennsylvania.
Woman recalls moment tornado hit hotel in Dover, Delaware
Woman recalls moment tornado hit hotel in Dover, Delaware
The state of emergency declared in Dover has since been lifted, but residents spent much of Friday cleaning up after the storm.
Two hotels along North DuPont Highway, the Days Inn and the Superlodge, suffered significant damage as the tornado moved through the area.
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The roof of both hotels are partially ripped off. You can even see damage and debris inside some of the rooms where windows were blown out.
One resident staying at a damaged hotel invited Action News inside to see the destruction.
"It was scary. I've never experienced anything like this," said one woman, who said she is nonmobile. "When it hit over the roof - like, the tornado - I was like, oh my God! I'm paralyzed. I'm stuck - I can't get out. What am I gonna do. I'm scared!"
"I felt my life was over," she added.
Dashcam video obtained by Action News captured debris flying through the air along North DuPont Highway as the tornado moved through the city.
Damian Bluto was driving the car.
"When the debris launched behind me, I'm like, if I would have stopped, that would have been an issue, because I would have been hit with a lot of something," he recalled.
Dashcam captures moment tornado rips roof off building in Dover, Delaware
"Honestly, it's a miracle. I don't know how we made it out of this without anybody being injured," Dover Police Department spokesperson Lt. Mark Hoffman said.
Police said the city was left dealing with numerous downed trees, flooded roadways and other storm-related damage.
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Residents described hearing the distinctive sound often associated with tornadoes.
"I never experienced anything like it," said Julian O'Neill. "The craziest part was the sound of it. It was like a whistling sound, almost like a train sound. The rain was so bad and the wind was so bad, you couldn't really see it. All you could see was the trees bending down like crazy.
Reagan Coder said he immediately recognized the danger.
"I heard the train sound and I just knew. I knew it was a tornado. I knew I had to go into my bathroom," he said.
Video captures storm damage in Dover, Del.
Additional damage was reported at the Kraft Heinz facility and at a Little League field on Electric Avenue, where fencing was toppled, poles were snapped and a tree brought down a scoreboard.
Despite the widespread damage, no injuries were reported.
Officials continue to assess the full extent of the storm's impact.
Chopper 6 over storm damage at Kraft Foods facility in Delaware