The 18" for Irma seems overstated, Leeburg reported 7.96"
Hurricane Irma: Rainfall & Flooding | Hurricane Irma
Here are some of the rainfall totals from Hurricane Irma across several locations in the Southeast U.S.:
Jacksonville: 10.01"
Gainesville: 12.94"
Orlando: 7.75"
Tampa: 4.58"
Fort Myers: 11.82"
Miami: 6.96"
Ian reports exceeded 16"
Hurricane Ian: Highest rainfall totals from across Florida | WKBN.com
Seminole County Recorded Rainfall
Location Recorded Rainfall (inches)
2 ESE Lake Mary 16.14″
2.2 W Oviedo 15.13″
Winter Springs 15.11″
Sanford Orlando Airport 15.00″
2.1 N Oviedo 14.96″
0.6 S Winter Springs 14.75″
2 ENE Goldenrod 14.46″
2.3 E Winter Springs 14.33″
1 NE Sanford 14.13″
.9 Chuluota 14.09″
Sanford 13.81″