Dark blue: It's going to take a foot or more of snow to close schools. Green: Any snow's going to shut things down. reddit.com/user/atrubetskoy hide caption

itoggle caption reddit.com/user/atrubetskoy

Snow and ice will hit a broad area from Texas to the Ohio Valley on Friday and Saturday, the National Weather Service says. This composite satellite image was taken at 6:15 a.m. ET Friday. NOAA hide caption

itoggle caption NOAA

For a "Cooking With Snow" class taught through Knowledge Commons DC, instructor Willie Shubert made baobing, a shaved ice dessert from China. Courtesy of Rachel Sadon hide caption

itoggle caption Courtesy of Rachel Sadon