Storm hazard · NOAA Storm Events Database
Marine Tropical Depression in the United States
National statistics for marine tropical depression events from the NOAA Storm Events Database (2015-2025): how often they occur, where they hit hardest, and the human and property toll.
- 31
- Events recorded
- 0
- Fatalities
- $0
- Property damage
- 3
- Areas affected
The verdict
Marine Tropical Depression occupies a similar band in NOAA's frequency and loss tables: #50 of 54 by event count and #53 by combined damage. It contributes <0.1% of recorded events and 0% of listed losses for 2015-2025.
- #50 of 54
- NOAA hazard types, by event count
- <0.1%
- share of all NOAA storm events, 2015-2025
- 31
- marine tropical depression events, 3 states and marine areas affected
Ranking reflects NOAA Storm Events Database event counts, not fatalities, injuries, or damage severity; a rare hazard type can still be individually catastrophic.
How dangerous are Marine Tropical Depression events in the U.S.?
Where this hazard actually strikes varies sharply by region. The three states and marine areas absorbing the largest share of events are ATLANTIC SOUTH (25 events, 0 fatalities), GULF OF MEXICO (5 events, 0 fatalities), GUAM WATERS (1 events, 0 fatalities), a pattern driven more by climatology than by any one state's vulnerability.
Frequency and financial loss occupy a similar place in the NOAA catalog for this hazard. Its #50 event-count rank sits within four positions of its #53 combined-damage rank; the listed losses account for 0% of the catalog total. Human impact is a separate comparison: the hazard ranks #52 for fatalities and contributes 0% of recorded deaths.
The cumulative NOAA record has a smaller reported human toll than most hazard types on this measure: 0 fatalities and 0 injuries among 31 events. PlainHazard's low human-toll band means fewer than five recorded fatalities during 2015-2025. It does not mean that an individual event is harmless, or that unrecorded impacts are zero.
The annual record is uneven rather than steadily rising or falling. The peak year on record was 2021, logging 6 events and $0 in property damage in a single calendar year. The most recent year in the dataset is 2024 with 1 events recorded. Across the full 9-year window, annual event counts reflect natural year-to-year noise given how infrequently this hazard is recorded at all.
NOAA records too few marine tropical depression events (31 events) to express a stable per-event fatality rate; a single incident would swing it by a wide margin. The cumulative record stands at 0 fatalities and 0 injuries, and no property or crop damage is recorded. Read those as counts, not as a rate.
NOAA entries are reports filed by local National Weather Service offices. Counts therefore reflect both observed weather and reporting practice; they do not measure unreported events, household exposure, or the probability of a future event at one address.
Marine Tropical Depression by State and Marine Area
Download all 13 state-year rows as CSV . Source data is public domain; our derived presentation is CC0.
| # | State or Marine Area | Events | Fatalities | Property Damage |
|---|---|---|---|---|
| 1 | ATLANTIC SOUTH | 25 | 0 | $0 |
| 2 | GULF OF MEXICO | 5 | 0 | $0 |
| 3 | GUAM WATERS | 1 | 0 | $0 |
Marine Tropical Depression by Year
Recorded marine tropical depression events averaged 3 per year across 2015-2019 versus 4 per year across 2020-2025: a 33% higher recorded rate in the later window. Reporting intensity varies by forecast office, so window-to-window comparisons describe the record, not a verified physical trend.
| Year | Events | Fatalities | Property Damage |
|---|---|---|---|
| 2024 | 1 | 0 | $0 |
| 2023 | 6 | 0 | $0 |
| 2022 | 3 | 0 | $0 |
| 2021 | 6 | 0 | $0 |
| 2020 | 4 | 0 | $0 |
| 2019 | 4 | 0 | $0 |
| 2018 | 5 | 0 | $0 |
| 2017 | 1 | 0 | $0 |
| 2016 | 1 | 0 | $0 |
What this record shows for Marine Tropical Depression
Marine Tropical Depression ranks #50 of 54 NOAA hazard types by event count; ATLANTIC SOUTH leads the geography table with 25 events, and 2021 is the peak year at 6 events.
- Compare how often this hazard appears against other NOAA event types nationally. All hazards
- Marine Tropical Depression events concentrate unevenly - the five most-affected states and marine areas already account for a large share of the national marine tropical depression record in this extract. Hazard risk by region
NOAA Storm Events counts reflect filed reports, not a forecast or household-level probability. For current threats follow the National Weather Service and local officials; in an emergency call 911.
Further reading for Marine Tropical Depression
Hazard risk by region
Marine Tropical Depression events concentrate unevenly - the five most-affected states and marine areas already account for a large share of the national marine tropical depression record in this extract.
More PlainHazard guides
- Preparing for natural disasters - household checklist (not hazard-specific advice).
- Hazard risk by region - how exposure varies across U.S. regions.
- Climate change and disasters - national severity and frequency context.
Frequently Asked Questions
Which states and marine areas record the most marine tropical depression events?
How much damage do marine tropical depression events cause?
What year had the most marine tropical depression events?
How dangerous are marine tropical depression events?
Source: NOAA NCEI Storm Events Database (2015-2025) NOAA NCEI Storm Events Database (2015-2025) For informational purposes only
Read our methodology - how this data is sourced, computed, and verified.
Related
Every figure on PlainHazard is rendered directly from FEMA federal disaster data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or national statistics report, the data & editorial changelog, or report a data error.