Maryland Storm Data: Hail & Wind History Since 2010
Deduplicated storm activity for Maryland, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Latest Maryland hail and wind storms
- Last reported hail in Maryland (0.75 in.+, screening): August 27, 2026 — 0.75 in. reported at Williamsport (Washington County), NWS Local Storm Report.
- 2026 so far in Maryland: 2 hail days and 49 wind days statewide (days with a storm report or station gust at the screening thresholds; warnings alone never count).
| Date | Largest reported hail | Strongest gust | City pages hit |
|---|---|---|---|
| October 16, 2026 | — | 51 mph measured | Gaithersburg |
| September 26, 2026 | — | 51 mph measured | — |
| September 25, 2026 | — | 52 mph measured | — |
| September 4, 2026 | — | 61 mph measured | Baltimore |
| September 2, 2026 | — | 56 mph measured | Baltimore, Gaithersburg |
| August 27, 2026 | 0.75 in. reported | — | Frederick |
| August 20, 2026 | — | 45 mph measured | — |
| August 17, 2026 | — | 49 mph measured | — |
| August 16, 2026 | — | 54 mph measured | — |
| August 10, 2026 | — | 62 mph measured | Baltimore, Gaithersburg |
Cities hit this week
City pages with a storm report or station gust at the screening thresholds (hail 0.75 in.+, wind 45 mph+) within 25 miles in the last 7 days, freshest first.
- Gaithersburg hail & wind — Oct 16, 2026 · 45 mph gust measured (Virginia)
Maryland storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 1,743 deduplicated storm events (wind, hail, tornado, and flood; NWS warning products included) in Maryland in the 12 months ending October 21, 2026.
- Storm activity touched 23 of 24 Maryland counties and Baltimore City over that period.
- The most impacted area in Maryland was Baltimore, with 145 events.
- The busiest day by event count in Maryland was March 16, 2026, with 127 events.
Maryland storm activity at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 1,743 storm events impacting 23 of Maryland's 24 counties and Baltimore City in the trailing 12 months: 989 wind events, 513 hail events, 79 tornado events, 162 flood events. Every count includes NWS warnings as well as observed reports, so tornado events mean tornado warnings and reports, not confirmed tornadoes.
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.
Wind covers thunderstorm and non-thunderstorm wind alike, so these counts measure something different from the NCEI entry counts in the history section below; the two are not comparable year to year. State totals also count NWS Special Weather Statements (radar-indicated hail or gusts below warning level); city pages leave those out.
Busiest days in Maryland by event count
Ranked by the number of 12-month events, NWS warnings included, so a day with many warnings can outrank a day with larger hail.
- March 16, 2026 — 127 events incl. warnings (flood, hail, tornado, wind)
- July 28, 2026 — 122 events incl. warnings (flood, hail, tornado, wind)
- August 10, 2026 — 103 events incl. warnings (flood, hail, tornado, wind)
- June 11, 2026 — 74 events incl. warnings (hail, wind)
- September 2, 2026 — 70 events incl. warnings (hail, wind)
Most impacted counties and Baltimore City
Events of every type for each county — wind, hail, tornado and flood, NWS warnings and Special Weather Statements included. City pages count wind and hail events only, so a county number on a city page is never higher than the number here.
- Baltimore — 145 events
- Prince George's — 109 events
- Frederick — 106 events
- Garrett — 88 events
- Montgomery — 88 events
- Carroll — 86 events
- Queen Anne's — 85 events
- Anne Arundel — 84 events
Additional activity recorded under other NWS area names (forecast zones, tribal lands, and former census areas): Extreme Western Allegany (5).
How these numbers are counted
The storm numbers on this page are counted in four different ways, plus the free address check. Each answers a different question with its own size cutoffs, area and time span, so compare numbers within one group, not across groups.
- Storm days (latest hail and wind): A day in the last 12 months when at least one report anywhere in Maryland showed hail 0.75 in. or larger or wind of 45 mph or more (StormAuditor screening thresholds). Reports are NWS storm reports from spotters, the public and officials, plus weather-station gusts, which count from 50 mph. A warning on its own never makes a storm day. The "City pages hit" column and each city's last reported hail apply the same rule within 25 miles of the city. The statewide columns count reports inside Maryland only. City pages count reports within 25 miles of each city, which can reach into a neighboring state; those values name the other state, so a border city's value for a day can be higher than the Maryland value.
- Storm-date pages (NWS severe): A storm-date page is published only when at least one report or station gust within 25 miles of a city met the National Weather Service severe criteria (hail 1.00 in. or larger, or wind 58 mph or more), at least two separate observations were logged, and the day ranks among the most significant. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. Not every storm day gets a page; when one does, the page and the storm-day table show the same largest hail and strongest gust.
- Events (12-month counts): Events count the Maryland storm log: NWS warnings and Special Weather Statements (a lower-level NWS alert), storm reports (wind 50 mph+, hail 0.75 in.+), station gusts, NCEI entries and FEMA disaster declarations, for each county affected, floods included. One event is one place on one day, counted separately for each type (wind, hail, tornado, flood). A weather station or storm-report point counts once a day, at that day's highest reading, however many readings it filed; a place with hail and wind on the same day is two events. NWS warnings and Special Weather Statements count once per county per day, and NCEI entries and FEMA declarations once per place per day. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. The same report arriving through another feed (SPC or NCEI) is one record. The most impacted counties list uses this count. City pages count only wind and hail within 25 miles and leave out floods and Special Weather Statements, so city counts do not add up to the state total, and a city page's county count is a wind-and-hail count that is never higher than the same county's number here.
- NOAA history (since 2010): The official NOAA storm record (NCEI Storm Events) in Maryland from January 1, 2010 to the day before the 12-month window starts: hail 0.50 in.+, thunderstorm wind 40 mph+ and tornadoes. It is a separate, older record with its own "storm days" (days with any entry), so its counts are not compared with the 12-month numbers.
- Free Report Snapshot: A free YES/NO estimate for one address, from radar and wind analysis at the property rather than area reports, at the same screening thresholds: hail 0.75 in. or wind 45 mph.
Full method: Methodology and Data Sources.
Maryland hail and wind history in NOAA NCEI records, 2010–Oct. 2025
This section covers January 1, 2010 through October 20, 2025. Storms from October 21, 2025 on are in the 12-month summary above, so no date is counted in both.
NOAA's Storm Events Database holds 7,576 NCEI Storm Events entries in Maryland for this period, on 598 separate storm days. Wind is the more common entry — 6,612 thunderstorm wind reports to 800 hail reports.
Storm days ranged from 28 in 2015 to 49 in 2019 and 2021. Across 2022–2024, Maryland averaged 36 storm days a year, below the 15-year average of 38.
The largest hail in these records for Maryland was 4.00 in. (grapefruit size), reported in 2015 and 2023 — most recently on August 7, 2023 in Washington County. Hail of 2 inches or more appears in 11 different years of this record, the latest being 2025 through Oct. 20. Measured thunderstorm gusts topped out at 87 mph (Washington County, February 16, 2025). NCEI also lists 164 tornado entries in Maryland — one entry per county a tornado crossed.
Hail peaks in May (30% of all hail reports); thunderstorm wind peaks in July. December through February accounts for 17 storm days.
- Average: 38 storm days a year (2010–2024)
- May and June: 54% of all hail reports
- Most hail reports in one year: 121 in 2011
- Hail of 1 in. or larger reported in every full year, 2010–2024
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 46 | 311 | 5 | 31 | 2.00 in. | 78 mph |
| 2011 | 121 | 271 | 29 | 48 | 2.75 in. | 72 mph |
| 2012 | 44 | 385 | 16 | 36 | 2.00 in. | 77 mph |
| 2013 | 15 | 172 | 10 | 32 | 2.75 in. | 68 mph |
| 2014 | 46 | 267 | 3 | 37 | 1.75 in. | 78 mph |
| 2015 | 22 | 251 | 6 | 28 | 4.00 in. | 74 mph |
| 2016 | 46 | 272 | 3 | 31 | 2.75 in. | 75 mph |
| 2017 | 47 | 395 | 4 | 35 | 1.75 in. | 72 mph |
| 2018 | 27 | 173 | 4 | 38 | 2.50 in. | 66 mph |
| 2019 | 63 | 552 | 6 | 49 | 2.00 in. | 70 mph |
| 2020 | 21 | 456 | 20 | 44 | 1.75 in. | 79 mph |
| 2021 | 58 | 942 | 16 | 49 | 1.75 in. | 67 mph |
| 2022 | 66 | 786 | 14 | 40 | 3.00 in. | 70 mph |
| 2023 | 112 | 794 | 8 | 34 | 4.00 in. | 84 mph |
| 2024 | 16 | 202 | 13 | 33 | 1.50 in. | 70 mph |
| 2025 through Oct. 20 | 50 | 383 | 7 | 33 | 2.50 in. | 87 mph |
Counties with the most NCEI storm reports, 2010–Oct. 2025
| County | All entries | Hail | Thunderstorm wind |
|---|---|---|---|
| Montgomery County | 868 | 88 | 766 |
| Baltimore County | 653 | 87 | 550 |
| Harford County | 594 | 39 | 547 |
| Frederick County | 542 | 43 | 487 |
| Anne Arundel County | 512 | 48 | 453 |
| Prince George's County | 459 | 37 | 412 |
| Charles County | 400 | 46 | 346 |
| Washington County | 378 | 63 | 313 |
| Carroll County | 372 | 36 | 323 |
| St. Mary's County | 333 | 47 | 268 |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/md.json (free, open license, cite StormAuditor).
Source: NOAA NCEI Storm Events Database (thunderstorm wind, hail, and tornado entries; hail 0.50 in. or larger, wind 40 mph or more; wind converted from knots).
Maryland storm history questions, 2010–Oct. 2025
What is the largest hail reported in Maryland, 2010–Oct. 2025?
4.00 in., grapefruit size, reported in 2015 and 2023; most recently on August 7, 2023 in Washington County, per NCEI. Hail of 2 inches or more appears in 11 years of this record in all, most recently 2019, 2022 and 2025 through Oct. 20.
What was Maryland's most active storm year, 2010–Oct. 2025?
2019 and 2021 tied, with 49 storm days each. The 15-year average is 38 storm days.
How often does Maryland get hail?
NCEI's records average 50 hail reports a year here over 2010–2024, alongside 415 thunderstorm wind reports. Hail of 1 inch or larger was reported in every one of those years.
When is hail season in Maryland?
May has the most hail reports (239, 2010–Oct. 2025), followed by June (190) and August (134).
How strong were measured thunderstorm winds in Maryland, 2010–Oct. 2025?
87 mph, measured on February 16, 2025 in Washington County. Only gusts NCEI lists as measured count here; gusts measured on a date and county with a tornado entry, and entries of 120 knots or more (known entry errors), are left out.
Storm professionals: restoration and exterior contractors, public adjusters, and crews and teams on one Organization plan work from this same public record — see StormAuditor for professionals.
Sources: NWS alerts (api.weather.gov) · NWS Local Storm Reports via the Iowa Environmental Mesonet · ASOS/AWOS station gusts via the Iowa Environmental Mesonet · NOAA NCEI Storm Events Database · every StormAuditor data source.
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 · JSON at https://www.stormauditor.com/downloads/storm-data/md.json. Free to reuse 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 for warnings, storm reports, and station observations at the address.
- Buy a full Weather Report for $2.99 covering every qualifying storm date at the address.
Browse day-by-day activity on the Storm Calendar (Pro plans and higher) or compare states on the Storm Data hub.
All values are derived from public NOAA and NWS data under StormAuditor's published methodology (see Limitations). Data last refreshed October 21, 2026.
See where recent storms tracked on the statewide Maryland hail map and wind map (the Hail and Wind Explorers, included with Pro+ and Organization plans), or check the county impact heatmap (free with an account).
Maryland cities A–Z: last reported hail
- Baltimore hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Frederick hail & wind history — last hail August 27, 2026 (1.00 in. reported in West Virginia)
- Gaithersburg hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
Neighboring states: Delaware storm data · Pennsylvania storm data · Virginia storm data · West Virginia storm data
Guides for reading this data
Storm-day records in Maryland
The newest storm-date pages for Maryland cities: a report or station gust within 25 miles of the city met NWS severe criteria (hail 1.00 in.+ or wind 58 mph+), with at least two separate observations. Each page lists the reports, station gusts and a free way to check one address:
Cite or link to this data — free
Free to quote, summarize, reuse, and link — for bloggers, journalists, researchers, contractors, and AI writing tools. No permission or credit required. A ready-made citation and link are below if they help. Terms: StormAuditor data & content license.
Citation: StormAuditor. "Maryland Storm Data: Hail & Wind History Since 2010." Updated October 16, 2026. https://www.stormauditor.com/storm-data/md
HTML link: <a href="https://www.stormauditor.com/storm-data/md">Maryland Storm Data: Hail & Wind History Since 2010 — StormAuditor</a>
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