Flash Flood — St. Lucie, Florida

2024-10-09 · near Indrio, St. Lucie, Florida

Event narrative

The rainbands of Hurricane Milton produced very heavy rainfall rates over a 3-hour period, between 1400EST and 1700EST that resulted in substantial flooding in portions of northeast St. Lucie County. Rainfall totals from the system ranged between 2 to 4 inches in the western part of the county, to as much as 6 to 8 inches in the eastern part of the county. Several roads were made impassable due to standing water issues, up to 3 feet in some areas. The Treasure Coast International Airport recorded 4.46 inches of rain on Oct 9, a new daily record rainfall for the site. Damage to property and county infrastructure was minimal.

Wider weather episode

Hurricane Milton moved ashore the west-central Florida coast as a category 3 hurricane on Oct 9 around 1930EST. The system continued slowly in an east-northeast trajectory across central Florida, becoming a category 1 hurricane before emerging into the Atlantic Ocean near Cape Canaveral. The outer rainbands of Milton overspread the Florida peninsula earlier in the day, leading to a prolific tornado outbreak across Okeechobee, Martin, St. Lucie, Indian River, Osceola and Brevard counties with over 19 confirmed tornadoes within a 4-hour period. Milton's slow forward motion produced very heavy rainfall, with significant urban and street flooding particularly near and north of the center's track, as well as a significant river flood event along the St. Johns. Considerable tree damage and some structural damage occurred due to the system's tropical storm force winds, and hurricane force wind gusts, particularly near and north of the track of the center.

View location on OpenStreetMap → (27.5505, -80.3204)

Source: NOAA Storm Events Database, event_id 1221447. Narrative written by the NWS forecast office that issued the report.