(RNN) - Four possible tornadoes have been spotted in Oklahoma, and more severe weather is expected for the Midwest Sunday after tornadoes on Saturday killed two children and three adults in the state.
The NWS has issued a tornado watch for parts of Arkansas, Missouri and Oklahoma. The warning includes the possibility of hail bigger than golf balls and wind gusts around 70 mph.
A second tornado watch has been issued for northern Iowa, southern Minnesota and west central Wisconsin, which will last until midnight.
The National Weather Service (NWS) branch in Tulsa, OK, reported that a tornado had been spotted in Eldon, OK, by Tulsa's KOTV.
The NWS also received reports of significant tree and some home damage near Tahlequah, OK, around 10:30 a.m. ET, suggesting a possible tornado had touched down.
Only five minutes later, tree damage near Tenkiller Lake suggested that another tornado may have hit the area.
Less than 10 miles away, a possible tornado damaged a mobile home, a barn and more trees, again five minutes later.
Tree damage suggested that a tornado may have struck Lincoln, AR while a sixth minor tornado was spotted briefly touching ground near Bartlett, NE around 2:55 p.m. ET.
Another tornado damaged two buildings and tore the roof off a structure near Ericson, NE, scattering debris in all directions. Two other minor tornadoes were spotted in Nebraska's Knox County.
No injuries have been reported.
The NWS expects that strong tornadoes which rank from EF-2 to EF-5 are unlikely in the region, although there is a 40 percent chance that two or more EF-1 tornadoes will hit the ground.
There is also an 80 percent chance that a combination of severe hail and wind will hit the area.
High winds were reported in Cherokee, KS, where a roof was torn off a building. Winds were estimated to be between 50 and 60 mph around 8 a.m. ET. The state was part of an earlier severe thunderstorm warning that has since expired.
In southeastern South Dakota, Davison and Sanborn counties reported dime to quarter-sized hail.
As the day wears on, the NWS predicts that tornadoes may form again, most likely in north central and northeast Iowa, south central and southeast Minnesota and western Wisconsin.
Severe storms are also possible from northern Wisconsin southward into Arkansas, northwest Louisiana and east Texas.
The storms are expected to pick up in the late afternoon hours.
However around 10:30 a.m., two aircraft were reportedly damaged at the Quad City International Airport in Rock Island, IL, due to high winds. A few flights were delayed from the airport, which serves travelers in eastern Iowa and western Illinois, according to its website.
The airport is just outside the area meteorologists expect tornadoes to hit Sunday night.
The warnings come on the heels of Saturday's outbreak across the Plains, which claimed five lives in Oklahoma.
Data from the NWS suggests that there may have been as many as 121 tornadoes to touch down in Oklahoma, Kansas, Nebraska and Iowa. According to Kansas Gov. Sam Brownback, 97 tornadoes hit the Sunflower State alone, although no fatalities have been reported.
The tornadoes were at times so violent that they "flattened out probably the west part of our town," Woodward, OK, Mayor Roscoe Hill said to Oklahoma City's KOCO.
The five fatalities in the state were in Woodward.
"It was insane," storm chaser and meteorologist Tony Laubuch told CNN. "One of the tornadoes we saw was extremely violent. In fact, it looked a lot like the Tuscaloosa tornado from last year."
Nearly a year ago to the day on April 25, 2011, tornadoes started churning from Texas to New York. The National Oceanic and Atmospheric Administration estimates 305 tornadoes hit the country from April 25 to 28, one of the most deadly striking Tuscaloosa, AL.
More than 240 people were killed in Alabama as a result of the storms, at least 64 of which died in Tuscaloosa, according to the NWS's Storm Prediction Center.
As of March 19, the NWS has recorded at least 57 fatalities as a result of tornado damage in 2012.
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