Storm hazard · NOAA Storm Events Database
Marine Dense Fog in the United States
National statistics for marine dense fog events from the NOAA Storm Events Database (2015–2025): how often they occur, where they hit hardest, and the human and property toll.
- 27
- Events recorded
- 15
- Fatalities
- $65.0K
- Property damage
- 4
- States affected
How dangerous are Marine Dense Fog events in the U.S.?
NOAA's Storm Events Database has catalogued 27 marine dense fog events across 4 states and territories between 2015 and 2025. The cumulative human toll is 15 fatalities and 4 injuries, and the financial footprint reaches $65.0K in combined property ($65.0K) and crop ($0) damage. On a per-fatality basis this places marine dense fog events at a moderate severity tier relative to other tracked hazard types in the NOAA catalog.
The geographic footprint is uneven across the country. The three states absorbing the largest share of events are AT (11 events, 0 fatalities), GU (9 events, 3 fatalities), E (5 events, 12 fatalities), largely a function of local terrain and settlement patterns rather than any single cause. At the other end, states such as GU, E , LA report far fewer events, a sign of lower exposure, though absence of a recorded event is not proof of zero risk.
Year-over-year trends reveal the event's volatility. The peak year on record was 2022, logging 8 events and $0 in property damage in a single calendar year. The most recent year in the dataset is 2025 with 6 events recorded. Across the full 7-year window, annual event counts reflect ordinary seasonal variability more than any clear multi-year trend.
How to interpret this data
NOAA storm event data is filed by local National Weather Service forecast offices, so reporting intensity can vary by jurisdiction and should be interpreted alongside FEMA disaster declarations for a fuller picture.
For household and business preparedness, this state-and-year view should be paired with local-level FEMA National Risk Index ratings, flood-zone maps where applicable, and up-to-date NWS watch/warning information, population exposure and asset value matter as much as raw event frequency for estimating real-world risk.
Marine Dense Fog by State
Marine Dense Fog by Year
| Year | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| 2025 | 6 | 0 | 0 | $0 |
| 2024 | 2 | 0 | 0 | $0 |
| 2022 | 8 | 4 | 0 | $0 |
| 2021 | 3 | 2 | 0 | $0 |
| 2020 | 2 | 5 | 2 | $0 |
| 2016 | 4 | 0 | 0 | $0 |
| 2015 | 2 | 4 | 2 | $65.0K |
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Frequently Asked Questions
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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.
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Every figure on PlainHazard is rendered directly from FEMA federal disaster data, no number is typed in by an editor. This page draws directly on FEMA federal disaster data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or national statistics report, or report a data error.