1904 Atlantic hurricane season

1904 Atlantic hurricane season
Season summary map
Seasonal boundaries
First system formed	June 10, 1904
Last system dissipated	November 4, 1904
Strongest storm
Name	Two
• Maximum winds	80 mph (130 km/h) (1-minute sustained)
• Lowest pressure	985 mbar (hPa; 29.09 inHg)
Seasonal statistics
Total depressions	6
Total storms	6
Hurricanes	4
Major hurricanes (Cat. 3+)	0
Total fatalities	112-275
Total damage	$2.5 million (1904 USD)
Related articles
1900–09 Pacific hurricane seasons 1902-19 Pacific typhoon seasons 1900s North Indian Ocean cyclone seasons
Atlantic hurricane seasons 1902, 1903, 1904, 1905, 1906

The 1904 Atlantic hurricane season featured no tropical cyclones during the months of July and August. The season's first cyclone was initially observed in the southwestern Caribbean on June 10. After this storm dissipated on June 14, the next was not detected until September 8. The sixth and final system transitioned into an extratropical cyclone offshore South Carolina on November 4. Two of the six tropical cyclones existed simultaneously.

Of the season's six tropical storms, four strengthened into a hurricane. None of these deepened further into a major hurricane, which is a tropical cyclone that reaches at least Category 3 on the modern day Saffir–Simpson hurricane wind scale. The Atlantic hurricane reanalysis project also indicated but could not confirm the presence of four additional tropical depressions throughout the season. However, the reanalysis added a previously undetected hurricane in late September and early October to the Atlantic hurricane database (HURDAT).^[1] The first and second systems left the most significant impacts during this season. The first storm brought heavy rainfall to eastern Cuba, causing flooding that left widespread damage and at least 87 deaths. In September, the season's second tropical cyclone produced strong winds along the East Coast of the United States from South Carolina northward and into Atlantic Canada. There were at least 18 deaths and $2.5 million (1904 USD) in damage.

The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 30, the third lowest value at the time and the lowest since 1864. ACE is a metric used to express the energy used by a tropical cyclone during its lifetime. Therefore, a storm with a longer duration will have high values of ACE. It is only calculated at six-hour increments in which specific tropical and subtropical systems are either at or above sustained wind speeds of 39 mph (63 km/h), which is the threshold for tropical storm intensity. Thus, tropical depressions are not included here.^[2]