You might want to see if it's possible to get an earlier flight into Sacramento Thursday or hope real hard for a warming trend.
Low fog in the Sacramento Valley has made the ceiling too low for landings at Sacramento after about 7 p.m. the last couple of nights. Planes have been diverting to RNO and OAK. Both are only about 90 minutes from Sacramento, but a drive in low, dense fog would not be pleasant.