Hurricanes Frances and Jeanne (2004) in Sebastian

Both storms came ashore on Hutchinson Island south of Indian River County, Frances on September 5, 2004 and Jeanne on September 25, 2004 in almost exactly the same spot, which put Sebastian north of each center (Sebastian Inlet District).

The Sebastian Inlet District history calls Jeanne a strong Category 3 storm and says the landfalls came less than three weeks apart. NWS Melbourne's Jeanne report adds that the greatest storm tides struck southern Brevard, Indian River, St. Lucie and Martin counties, near and to the right of where Jeanne came ashore, a list that includes Sebastian's county (NWS Melbourne Jeanne report).

A research tower in Sebastian logged a 101-knot peak wind (about 116 mph) and a 71-knot two-minute sustained wind at 0647 UTC on September 26, 2004, during Jeanne (NWS Melbourne Jeanne report).

The airport instruments let both storms down. The Frances report notes that the Vero Beach airport station, among others, failed during or before the height of the storm. The Jeanne report repeats the warning: failed airport sites mean the official record does not reflect the true magnitude of Jeanne's winds. That is why the Sebastian figures for 2004 come from research towers rather than from Sebastian Municipal Airport or the Vero Beach airport.

Rain was secondary. NWS Melbourne lists 5.08 inches at the Vero Beach airport from September 25 to 27, while radar estimates of 5 to 8 inches covered a large swath of east central Florida and 11 to 13 inches fell over southern Brevard and Osceola counties (NWS Melbourne). For Frances, the NWS Melbourne Frances report puts radar estimates of 5 to 8 inches over most of the region. The timing mattered more than the totals: across the region, Jeanne's rain fell on ground that Frances had already saturated, and NWS Melbourne reports the most widespread Jeanne flooding over south Brevard and Osceola counties, with the middle St. Johns River still in major flood a week after landfall.

Frances pushed an estimated 3 to 4 feet of surge onto the west bank of the Indian River in southern Brevard and Indian River counties, where Sebastian sits, and eroded that bank badly (NWS Melbourne Frances report).

The Frances report estimated beach storm surge from 6 feet around Cocoa Beach to 8 feet around Vero Beach, not counting waves, and dune recession of 8 to 12 feet in parts of Indian River County. On the mainland, part of the northbound lane of U.S. 1 north of the Sebastian River was closed for fear it would be undermined.

Jeanne made the lagoon damage worse three weeks later. The Jeanne report says the greatest storm tides fell over southern Brevard, Indian River, St. Lucie and Martin counties, and that landfall near low tide spared the coast from southern Brevard to Martin up to 4 more feet of water. What NWS called unusual was severe erosion inside the Intracoastal Waterway. Along the lagoon's west shore, sections of the northbound U.S. 1 lane collapsed in the Melbourne, Micco and Barefoot Bay areas, and the Sebastian River bridge was damaged by erosion and closed for at least a week for evaluation and repairs.

The barrier island east of Sebastian took the beach side of both blows. NWS Melbourne reports that Frances undermined a large section of road in Vero Beach and caused significant damage to boardwalks and dune crossovers, and that during Jeanne Highway A1A was covered by sand and saltwater in a number of places from south Brevard County to Vero Beach. Beach erosion in Jeanne was worse because Frances had already stripped the same Indian River County shoreline three weeks earlier.

For Sebastian, that combination of a closed river bridge to the north and an undermined highway lane along the shore meant the main route along the lagoon was compromised twice in one month, a pattern worth remembering when U.S. 1 is the planned way out of town.

Yes, NWS Melbourne's aerial surveys after Jeanne found tornado or tornado-like damage streaks over southern Brevard, Indian River and St. Lucie counties, with two clear tracks over Barefoot Bay, just north of Sebastian (NWS Melbourne Jeanne report).

Most of the streaks formed in the eyewall or innermost rainbands. Within a large area of similar high winds, the surveys found much smaller swaths of more extreme damage, either from eyewall convection mixing down stronger winds like an intense downburst or from true eyewall tornadoes. The report places the most severe destruction in Barefoot Bay and notes a number of areas of concentrated forest blowdowns and enhanced damage elsewhere in southern Brevard and Indian River counties.

Indian River County's damage estimates climbed with each storm: close to $1 billion after Frances, then a preliminary $2 billion after Jeanne, with 41,000 residences with minor damage and 8,300 with major damage or destroyed (NWS Melbourne Jeanne report).

The Frances figure came from county emergency management, which told NWS Melbourne that damage would be close to one billion dollars, though a detailed assessment was not yet available (NWS Melbourne Frances report). Both numbers are early estimates published within days of each storm, and the Jeanne figure is explicitly preliminary, so neither should be read as a final audited cost for Sebastian or the county.

Neighboring counties put the scale in context. The same Frances report gives St. Lucie County initial damage of $2.5 billion in public and private losses, and the Jeanne report puts St. Lucie at a preliminary $1.2 billion and Brevard at $320.4 million, with 14,207 Brevard residences damaged and 892 destroyed. Indian River County, Sebastian's county, carried the largest dollar estimate on the NWS Jeanne list.

Each storm that struck Sebastian had its own federal major disaster declaration for Florida: Frances as DR-1545-FL, declared September 4, 2004, and Jeanne as DR-1561-FL, declared September 26, 2004 (FEMA DR-1545; FEMA DR-1561).

Frances was declared the day before it reached Hutchinson Island, and Jeanne's incident period, September 24 to November 17, 2004, began while the Frances incident period, which ran to October 8, was still open. The federal aid also reached Sebastian's beaches later: the Sebastian Inlet District records placing 86,000 cubic yards of sand on downdrift beaches in 2007, funded by FEMA to repair hurricane damage, through an interlocal agreement with Indian River County (Sebastian Inlet District history).

The Sebastian Inlet jetties held: the Sebastian Inlet District credits a 2002 north jetty renovation, which added an elevated concrete cap, handrails and a grate system and reopened the following August, with both jetties surviving the 2004 storms (Sebastian Inlet District history).

The repair work that followed fell mostly on sand. The District's 2007 FEMA-funded placement of 86,000 cubic yards on beaches downdrift of the inlet came on top of a multi-year, five-phase renourishment the District had finished in 2002, which placed more than 200,000 cubic yards of upland sand on the beaches south of Sebastian Inlet.

For riverfront owners watching the next storm, the City of Sebastian's flood page now links a hydrograph from the Indian River Lagoon at Wabasso, which the city calls NOAA's only real-time water level gage in the area, the quickest way to watch lagoon surge rise (City of Sebastian). The city's storm information line is 772-581-0111 (City of Sebastian). Last verified: October 14, 2026, on the City of Sebastian website.