Squall line suspected of causing of swath of damage from McCurtain County, Okla., to Hempstead County, Ark. Brief EF-1 tornado also cut 2.4-mile path in southern Little River County, Ark., NWS storm surveyors say An example of a storm's squall line. (Source: WLBT) By Curtis Heyen | April 10, 2021 at 9:56 PM CDT - Updated April 10 at 9:59 PM (KSLA) — A brief EF-1 tornado cut a path 2.4 miles long in southern Little River County, Ark., late Friday night. That’s the finding of a National Weather Service survey team that went out to survey damage Saturday, April 10. The surveyors also suspect that a squall line packing winds of 70-90 mph caused of swath of damage some 40-60 miles from McCurtain County, Okla., to just past Fulton in Hempstead County, Ark.