Marine Hail
NOAA Storm Events type · 868 records since 2002 · marine zones
The National Weather Service defines marine hail as: "Hail 3/4 of an inch in diameter or larger, occurring over the waters and bays of the ocean, Great Lakes, and other lakes with assigned specific Marine Forecast Zones, will be entered." NOAA's Storm Events Database holds 868 marine hail records from 2002 through June 30, 2026.
How the National Weather Service files marine hail
Hail 3/4 of an inch in diameter or larger, occurring over the waters and bays of the ocean, Great Lakes, and other lakes with assigned specific Marine Forecast Zones, will be entered. Hail 3/4 of an inch in diameter or larger, occurring immediately along the shorelines of the waters and bays should be entered as a Marine Hail event, especially if the storm moved over the near-shore waters (it is reasonable to assume it maintained its strength).
National Weather Service Instruction 10-1605, Storm Data Preparation (July 26, 2021), Appendix A, entry 31
Source: National Weather Service Instruction 10-1605. Read the instruction (PDF).
Marine Hail, 2002 to 2026
Records per year (2026 to June 30, 2026).
- recorded, no damage figure
- under $10 million
- $10 million or more
- $100 million or more
- $1 billion or more, or 100 deaths
- $10 billion or more, or 1,000 deaths
- a year's colour: its recorded damage or deaths
- a year with a death
- Records
- 8682002 to June 30, 2026
- Deaths
- 00 injuries
- Damage, 2025 dollars
- $57Kas filed (scale steps before 1993)
Source: NOAA NCEI Storm Events Database, records through June 30, 2026. Search the record at NCEI.
When do marine hail records happen?
43% of its marine hail records since 2002 fell in June and July. The busiest month is June.
The values, month by month
Jan 2 · Feb 11 · Mar 61 · Apr 98 · May 139 · Jun 211 · Jul 159 · Aug 117 · Sep 47 · Oct 19 · Nov 3 · Dec 1 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began.