Maryland Storm Data: Hail, Wind & Severe Weather
Deduplicated severe weather activity for Maryland, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Maryland severe weather at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 2,712 storm events impacting 23 of Maryland's 24 counties in the trailing 12 months: 1,596 wind events, 979 hail events, 95 tornado events, 176 flood events. Events are fused from National Weather Service warnings and Special Weather Statements, observed Local Storm Reports, official NCEI storm records, and FEMA disaster declarations, then consolidated into a single event table under the published methodology. Because a single storm can carry more than one hazard tag (a squall line can produce both wind and flood records), the per-type counts can legitimately add up to more than the consolidated total. Sub-severe statements (radar-indicated gusts of 40+ mph or hail of 0.5"+) are included at a distinct moderate tier and never counted as severe.
Biggest Maryland storm days
- March 16, 2026 — 270 recorded events (flood, hail, tornado, wind)
- August 10, 2026 — 216 recorded events (flood, hail, tornado, wind)
- July 28, 2026 — 190 recorded events (flood, hail, tornado, wind)
- July 4, 2026 — 162 recorded events (hail, tornado, wind)
- July 18, 2026 — 157 recorded events (flood, hail, tornado, wind)
Most impacted counties
- Baltimore — 245 events (179 severe)
- Frederick — 219 events (186 severe)
- Queen Anne's — 146 events (132 severe)
- Anne Arundel — 143 events (123 severe)
- Montgomery — 142 events (120 severe)
- Carroll — 134 events (112 severe)
- Talbot — 125 events (111 severe)
- Washington — 125 events (109 severe)
Additional activity recorded in NWS forecast zones: Prince Georges (134) · St. Marys (79) · Queen Annes (7) · And Eastern Allegany (6).
Download the Maryland dataset (free)
The full consolidated Maryland event list for the trailing 12 months — dates, counties, hazard types, severities, measured gusts and hail sizes, with coordinates; source records deduplicated, and each NWS warning product listed per affected county — downloads free and stays current with the live record: download CSV · download JSON. Reusable with attribution under the data license; the JSON file carries a field dictionary and provenance notes.
Research a specific Maryland address
Statewide counts tell you where activity concentrated; they do not tell you what happened at one property. For an individual address, run the Free Report Snapshot (an instant YES/NO against StormAuditor's screening thresholds — wind ≥ 45 mph, hail ≥ 0.75 in., deliberately below the official NWS severe criteria), use the Address Lookup, or purchase a full Weather Report for $2.99 covering every qualifying storm date at the address. Browse day-by-day activity on the Storm Calendar or compare states on the Storm Data hub.
All values are derived from public NOAA and NWS data under StormAuditor's published methodology. They are research estimates, not certified weather records — see Limitations. Data last refreshed September 6, 2026.
See where recent storms tracked on the statewide Maryland hail map and wind map, or check the county impact heatmap.
Maryland city storm pages: Baltimore hail & wind history · Frederick hail & wind history · Gaithersburg hail & wind history
Neighboring states: Delaware storm data · Pennsylvania storm data · Virginia storm data · West Virginia storm data
About this page: built by Storm Auditor LLC from public NOAA/NWS records — deduplicated warnings, storm reports, station measurements, and official records on a rolling 12-month window, under the published methodology. See the StormAuditor Editorial Team for how content is produced.
Read more: Maryland Severe Weather