An EF1 tornado was confirmed in Kane County and an EF0 tornado was confirmed in Porter County Tuesday.
A tornado rated at EF1 on the enhanced Fujita tornado scale was confirmed by a National Weather Service storm survey team surveying the damage.
A tornado touched down about 2 miles northwest of Elburn in Kane County at 6:55 AM this Tuesday morning. The tornado's path length was surveyed to be about 3/4 of a mile... with a path width of 50 yards. Two barns and a grain bin were destroyed along with a pole snapped at the base at one farmstead... and there was damage to a homestead two other farmsteads nearby. Debris from some of the damaged structures was blown 1/4 mile downstream.
This tornado touched down 4 miles southeast of Malden at 8:33 AM this Tuesday Morning. The tornado's path length was surveyed to be about 200 yards... with a path width of 30 yards. One outbuilding was damaged by this tornado.
The EF tornado scale is used to assign a tornado a rating based on estimated wind speeds and related damage. When tornado related damage is surveyed... it is compared to a list of damage indicators and degrees of damage which help estimate better the range of wind speeds the tornado likely produced. From this... a rating (zero to five) is assigned.