Temperatures are expected to drop this afternoon as heavy rain and thunderstorms move into Washtenaw County.

According to an alert from the National Weather Service, "the thunderstorms will not be severe... but will likely produce small hail or ice pellets."

The temperature as of about 11 a.m. Friday was 41, and that's likely to be the day's high. The low is forecast to fall to 32.

The forecast isn't likely to deter the start of Ann Arbor's "Festifools" weekend.

From a related story: Organizers of FoolMoon, the parade of homemade luminary sculptures / street party set for this evening in downtown Ann Arbor, have announced plans to deal with a somewhat iffy weather forecast.

See more about the weather on AnnArbor.com's weather page.

Doug Conlin, owner of The New Zoo Play Cafe in Ypsilanti Township, captured this video of heavy sleet falling outside his business on Friday afternoon.