A new tornado watch was issued Sunday for parts of West Virginia, Ohio and PA.
Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.
The same storm system delivered raging winds to the Plains states earlier, leading to wildfires and severe dust storms that left more than a dozen people dead in Kansas, Texas and Oklahoma.
Overall, at least 40 deaths have been recorded from the cross-country storm system.
As the cross-country storm continues to spread across the United States, cities north of Tampa, Florida, are now under tornado warnings.
Zephyrhills, Pasadena Hills and Crystal Springs are under alert until 7:30 p.m. ET, according to the National Weather Service.
Mississippi Governor Tate Reeves shared a storm update Sunday afternoon after signing a state of emergency declaration Saturday night.
The governor said preliminary information shows as many as 12 tornadoes could have ripped through the state in the cross-country storm.
The storm left six dead and 27 injured in Mississippi, but the three people reported missing were found alive, Reeves said.
Twenty-three counties in the state are reporting damage and 12 filed emergency requests, the governor said.
-ABC News' Darren Reynolds
President Donald Trump took to his social media platform on Sunday to say that the White House is monitoring the spate of tornadoes and storms impacting the Midwest and South.
Thirty-seven people have been killed in the cross-country storm system, according to officials.
Trump said the National Guard has been deployed to Arkansas.
"My Administration is ready to assist State and Local Officials, as they help their communities to try and recover from the damage," Trump wrote.
"Please join Melania and me in praying for everyone impacted by these terrible storms!" the president added.
-ABC News' Hannah Demissie
An EF-4-rated tornado -- the strongest of this multi-day, severe weather outbreak -- has been confirmed in Diaz, Arkansas, according to officials.
Preliminary information showed the twister had an estimated peak winds of 190 mph.
The last EF-4 tornado to impact the area was in December 2021.
-ABC News' Daniel Peck
