Delaware Storm Data: Hail & Wind History Since 2010
Deduplicated storm activity for Delaware, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Latest Delaware hail and wind storms
- Last reported hail in Delaware (0.75 in.+, screening): none in the last 12 months.
- 2026 so far in Delaware: no hail days and 23 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 1, 2026 | — | 70 mph measured | Dover |
| September 16, 2026 | — | 75 mph measured | Dover |
| September 4, 2026 | — | 64 mph measured | — |
| September 3, 2026 | — | 58 mph reported | — |
| September 1, 2026 | — | 68 mph measured | Wilmington, Dover, Newark |
| August 20, 2026 | — | 47 mph measured | — |
| August 10, 2026 | — | 63 mph reported | Dover, Newark |
| August 8, 2026 | — | 48 mph measured | Wilmington, Dover, Newark |
| July 28, 2026 | — | 63 mph reported | Wilmington, Dover, Newark |
| July 22, 2026 | — | 50 mph measured | — |
Delaware storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 288 deduplicated storm events (wind, hail, tornado, and flood; NWS warning products included) in Delaware in the 12 months ending October 21, 2026.
- Storm activity touched 3 of 3 Delaware counties over that period.
- The most impacted county in Delaware was New Castle, with 105 events.
- The busiest day by event count in Delaware was August 20, 2026, with 22 events.
Delaware storm activity at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 288 storm events impacting 3 of Delaware's 3 counties in the trailing 12 months: 143 wind events, 64 hail events, 15 tornado events, 66 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 Delaware 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.
- August 20, 2026 — 22 events incl. warnings (flood, hail, tornado, wind)
- March 16, 2026 — 18 events incl. warnings (hail, tornado, wind)
- September 1, 2026 — 16 events incl. warnings (flood, hail, wind)
- July 21, 2026 — 13 events incl. warnings (flood, hail, wind)
- July 28, 2026 — 12 events incl. warnings (flood, hail, tornado, wind)
Most impacted counties
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.
- New Castle — 105 events
- Sussex — 100 events
- Kent — 77 events
Additional activity recorded under other NWS area names (forecast zones, tribal lands, and former census areas): Delaware Beaches (1).
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 Delaware 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 Delaware 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 Delaware 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 Delaware 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 Delaware 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.
Delaware 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 887 NCEI Storm Events entries in Delaware for this period, on 211 separate storm days. Wind is the more common entry — 758 thunderstorm wind reports to 102 hail reports.
The largest hail in these records for Delaware was 2.50 in. (tennis-ball size), reported on May 22, 2014 in New Castle County. Hail of 2 inches or more appears in 2 different years of this record, the latest being 2022. Measured thunderstorm gusts topped out at 87 mph (New Castle County, July 12, 2022). NCEI also lists 27 tornado entries in Delaware — one entry per county a tornado crossed.
Hail peaks in June (32% of all hail reports); thunderstorm wind peaks in July. December through February accounts for 6 storm days.
Storm days ranged from 5 in 2018 to 22 in 2019. Across 2022–2024, Delaware averaged 14 storm days a year, above the 15-year average of 13.
- Average: 13 storm days a year (2010–2024)
- May and June: 62% of all hail reports
- Most hail reports in one year: 22 in 2023
- Hail of 1 in. or larger reported in 11 of 15 full years (2010–2024)
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 9 | 24 | 0 | 13 | 1.25 in. | 70 mph |
| 2011 | 8 | 30 | 1 | 18 | 1.25 in. | 77 mph |
| 2012 | 9 | 29 | 1 | 14 | 1.75 in. | 69 mph |
| 2013 | 2 | 23 | 1 | 12 | 0.75 in. | 70 mph |
| 2014 | 4 | 24 | 1 | 8 | 2.50 in. | 61 mph |
| 2015 | 1 | 27 | 1 | 10 | 1.25 in. | 66 mph |
| 2016 | 3 | 43 | 0 | 13 | 1.00 in. | 64 mph |
| 2017 | 1 | 18 | 1 | 8 | 0.75 in. | 76 mph |
| 2018 | 1 | 7 | 0 | 5 | 1.00 in. | — |
| 2019 | 20 | 80 | 2 | 22 | 1.50 in. | 70 mph |
| 2020 | 1 | 129 | 6 | 20 | 0.75 in. | 79 mph |
| 2021 | 6 | 88 | 4 | 16 | 1.00 in. | 68 mph |
| 2022 | 14 | 76 | 0 | 15 | 2.25 in. | 87 mph |
| 2023 | 22 | 108 | 6 | 18 | 1.00 in. | 58 mph |
| 2024 | 0 | 21 | 1 | 9 | — | — |
| 2025 through Oct. 20 | 1 | 31 | 2 | 10 | 1.75 in. | 60 mph |
Counties with the most NCEI storm reports, 2010–Oct. 2025
| County | All entries | Hail | Thunderstorm wind |
|---|---|---|---|
| New Castle County | 401 | 53 | 341 |
| Sussex County | 296 | 31 | 252 |
| Kent County | 190 | 18 | 165 |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/de.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).
Delaware storm history questions, 2010–Oct. 2025
What is the largest hail reported in Delaware, 2010–Oct. 2025?
2.50 in., tennis-ball size, reported on May 22, 2014 in New Castle County, per NCEI. Other years with hail of 2 inches or more: 2022.
What was Delaware's most active storm year, 2010–Oct. 2025?
2019, with 22 storm days (20 hail reports, 80 thunderstorm wind reports, 2 tornado entries). The 15-year average is 13 storm days.
How often does Delaware get hail?
NCEI's records average 6.7 hail reports a year here over 2010–2024, alongside 48 thunderstorm wind reports. Hail of 1 inch or larger was reported in 11 of those 15 years.
When is hail season in Delaware?
June has the most hail reports (33, 2010–Oct. 2025), followed by May (30) and April (14).
How strong were measured thunderstorm winds in Delaware, 2010–Oct. 2025?
87 mph, measured on July 12, 2022 in New Castle 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.
Working storm claims? Roofing contractors, public adjusters, and insurance adjusters work from this same public storm record with statewide hail and wind maps and per-address reports — 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 Delaware dataset (free)
The full consolidated Delaware 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/de.json. Free to reuse under the data license; the JSON file carries a field dictionary and provenance notes.
Research a specific Delaware 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 Delaware 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).
Delaware cities A–Z: last reported hail
- Dover hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Newark hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Wilmington hail & wind history — last hail May 20, 2026 (1.00 in. reported in Pennsylvania)
Neighboring states: Maryland storm data · New Jersey storm data · Pennsylvania storm data
Guides for reading this data
Storm-day records in Delaware
The newest storm-date pages for Delaware 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. "Delaware Storm Data: Hail & Wind History Since 2010." Updated October 1, 2026. https://www.stormauditor.com/storm-data/de
HTML link: <a href="https://www.stormauditor.com/storm-data/de">Delaware 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.