WINONA, Minn. — A Winona driver was arrested during a traffic stop on suspicion of meth use. The arresting officer said William Alan Post, age, 39, was jerky, spoke rapidly and had watery eyes — all symptoms associated with meth. He then failed field sobriety tests that check for dexterity and balance. At jail a blood sample was taken and sent to an outside lab. A specific charge will hinge on test results, police said. The traffic stop was about 8:55 a.m. at King and Orin streets on the West Side.