MAYFLOWER, AR - Survey teams from the National Weather Service (NWS) office in Little Rock are tracking the path of Sunday's killer tornado.
NWS forecaster John Robinson says two teams will start at Mayflower, with one going southwest from there and the other going northeast.
He says it's very unlikely that the teams will complete the entire track(s) today. If that's the case, then there would not be a determination today as to the EF rating.
On Sunday night, the NWS sent out a storm report saying there were two houses with only the slab remaining, so there has been speculation that the tornado may have been EF5, Robinson says. The Enhanced Fujita Scale says "Destruction of engineered and/or well constructed residence; slab swept clean."
He says most houses are not going to meet the criteria for engineered or well-constructed.
"Wind engineers have told us that a house that does not have its walls connected to its foundation can be swept off the foundation with winds as low as 100-110 mph. So, an empty slab does not guarantee a high rating," Robinson says.
The last tornado to strike the area touched down in Vilonia on April 25, 2011. It was rated EF2.
The attached video was taken with a drone this morning in Mayflower.