All of Indiana most of the western half of Ohio and extreme southern Michigan are at slight risk of severe weather between 8 a.m. EDT Thursday, October 31 and 8 a.m. EDT Friday, November 1, according to the Day Two Convective Outlook that the National Weather Service (NWS) Storm Prediction Center issued at 1:26 p.m. EDT today. The slight risk area includes the entire 37-county warning area of the northern Indiana NWS office.

Halloween afternoon, forecasters expect a line of thunderstorms to develop and move rapidly eastward. The primary threat will be damaging straight-line winds. The line of storms could bend, however, into a bow or wave pattern, which could support tornadoes embedded within the line.

Parents venturing out with trick-or-treaters should make sure they have a way to receiving word of any storm watches or warnings that might come out tomorrow afternoon and evening. Possibilities include keeping the car radio tuned to a local station, signing up for text alerts available on the websites of many local media outlets and/or installing a weather alert smartphone app. SKYWARN spotters should prepare for the possibility of activation Thursday afternoon and/or evening.

The next update on severe weather risk for Halloween comes with the first Day One Convective Outlook of the day, due at approximately 2 a.m. EDT. Additional updates will follow at 9 a.m., 12:30 p.m. 4 p.m. and 8 p.m.