Hail History

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Hail history for Gwynn Oak, MD

Last hail within 10 milesJul 28, 20260.75 in (penny)
Hail days, last 12 months1
Largest hail since 20064 in (grapefruit)Jun 23, 2015
Hail days since 200630
Days with hail 1 inch or larger24
Tornadoes within 10 miles12
Damaging wind reports within 10 miles391

Hail has been reported within 10 miles of Gwynn Oak on 30 days since 2006. The largest stones measured 4 in (grapefruit) on Jun 23, 2015. Hail is most common here in August and July.

Recent hail near Gwynn Oak

DateHail sizeWhereSource
Jul 28, 20261.75 in
golf ball		Highlandtown
2 hail reports · closest 8 mi from Gwynn Oak		NWS storm report (preliminary)
May 3, 20251.75 in
golf ball		Timonium, Green Spg Jct, Owings Mills
3 hail reports · closest 6 mi from Gwynn Oak		NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near Gwynn Oak by year

10630730810911011121211331421516317218219202212212324125126

When hail season peaks near Gwynn Oak

Of the 30 hail days since 2006, most fell in August (7) and July (7).

Jan1FebMar1Apr6May7Jun7Jul7Aug1SepOctNovDec

Largest hail storms near Gwynn Oak

Jun 23, 2015 · 4 in (grapefruit) · Padonia (10 mi from Gwynn Oak)

Jun 10, 2008 · 1.75 in (golf ball) · Timonium (8 mi from Gwynn Oak)

National Weather Service description (English): A trained spotter reported golf ball-sized hail in Timonium. Minor siding damage was reported on Belfast Road.

May 12, 2018 · 1.75 in (golf ball) · Oella (5 mi from Gwynn Oak)

May 3, 2025 · 1.75 in (golf ball) · Timonium (8 mi from Gwynn Oak)

National Weather Service description (English): Golf ball size hail was reported near Timonium.

Jul 28, 2026 · 1.75 in (golf ball) · Highlandtown (8 mi from Gwynn Oak)

Tornadoes within 10 miles of Gwynn Oak

DateRatingWherePath
May 16, 2025EF1Port Covengton
6 mi from Gwynn Oak		0.2 mi long, 75 yd wide
May 16, 2025EF1Canton
7 mi from Gwynn Oak		2.7 mi long, 75 yd wide
May 16, 2025EF1St Helena
10 mi from Gwynn Oak		1.4 mi long, 75 yd wide
Jun 5, 2024EF1Relay
7 mi from Gwynn Oak		2.9 mi long, 175 yd wide
Jun 5, 2024EF1Lansdowne
6 mi from Gwynn Oak		0.5 mi long, 175 yd wide
Jun 5, 2024EF0Canton
7 mi from Gwynn Oak		0.4 mi long, 90 yd wide
Nov 2, 2018EF1Penn Mary Jct
9 mi from Gwynn Oak		1.5 mi long, 150 yd wide
Nov 2, 2018EF1St Helena
10 mi from Gwynn Oak		1.2 mi long, 150 yd wide
Jun 10, 2013EF0Sparrows Pt
7 mi from Gwynn Oak		0.2 mi long, 75 yd wide
Nov 17, 2010EF1Raspeburg
7 mi from Gwynn Oak		0.1 mi long, 175 yd wide
Nov 17, 2010EF1Parkville
7 mi from Gwynn Oak		0.3 mi long, 250 yd wide
Jun 9, 2009EF0St Helena
9 mi from Gwynn Oak		1.0 mi long, 150 yd wide

Damaging thunderstorm winds near Gwynn Oak

391 reports of damaging thunderstorm wind within 10 miles of Gwynn Oak since 2006, on 157 days. The strongest measured gust was 70 mph on Aug 6, 2019.

DateStrongest gustWhereSource
Sep 2, 2026damage reportedParkville, Pikesville
2 wind reports		NWS storm report (preliminary)
Aug 10, 2026damage reportedArbutus, Randallstown, Historic Ellicott
15 wind reports		NWS storm report (preliminary)
Aug 7, 2026damage reportedRosedale
1 wind report		NWS storm report (preliminary)
Jul 28, 2026damage reportedRandallstown, Owings Mills, Brooklandville
4 wind reports		NWS storm report (preliminary)
Jul 27, 2026damage reportedBaltimore
1 wind report		NWS storm report (preliminary)
Jul 18, 2026damage reportedElkridge, Woodstock, Historic Ellicott
4 wind reports		NWS storm report (preliminary)
Jul 5, 2026damage reportedRosedale
1 wind report		NWS storm report (preliminary)
Jul 4, 2026damage reportedHistoric Ellicott, Owings Mills, Lochearn
5 wind reports		NWS storm report (preliminary)
Jun 11, 202660 mph, estimatedSt Georges, Sparrows Pt
2 wind reports		NOAA Storm Events
May 20, 202666 mph, measuredSparrows Pt, Ilchester, Bare Hills
3 wind reports		NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Gwynn Oak; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Gwynn Oak.

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