Last modified: Wednesday, July 23, 2008 5:06 PM EDT Tornado warning cancelled, severe thunderstorm watch still in effect BY SUSAN LaHOUD SUN CHRONICLE STAFF The National Weather Service station in Taunton has just issued an advisory at 4:50 p.m. canceling the tornado warning for central Bristol and Plymouth counties. However, torrential rain will cause street flooding. There will also be dangerous cloud to ground lightning with this thunderstorm. A severe thunderstorm watch remains in effect until 10 p.m.