May 20, 2026 hail storm near Mercersburg, PA. Radar-confirmed hail track and contractor lead lists available.
NWS WARNING AREA · Mercersburg Metro · May 20, 2026
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This storm generated 42 NWS alert zones. Pro access covers the complete storm track and all addresses across every zone.
Mercersburg, PA
264 addresses in warning area
Alert issued Wed, May 20 · 5:03 PM UTC
Berkeley Springs, WV
Alert issued Wed, May 20 · 5:37 PM UTC
Greencastle, PA
56 addresses in warning area
Alert issued Wed, May 20 · 5:43 PM UTC
Yellow Spring, WV
Alert issued Wed, May 20 · 6:35 PM UTC
New Market, VA
Alert issued Wed, May 20 · 6:43 PM UTC
Knoxville, MD
Alert issued Wed, May 20 · 6:46 PM UTC
Hamilton, VA
Alert issued Wed, May 20 · 6:59 PM UTC
Boyce, VA
Alert issued Wed, May 20 · 7:24 PM UTC
Schuylkill Haven, PA
Alert issued Wed, May 20 · 7:27 PM UTC
Markham, VA
320 addresses in warning area
Alert issued Wed, May 20 · 7:39 PM UTC
New Windsor, MD
864 addresses in warning area
Alert issued Wed, May 20 · 7:41 PM UTC
Felton, PA
Alert issued Wed, May 20 · 7:52 PM UTC
Kempton, PA
Alert issued Wed, May 20 · 7:57 PM UTC
Reading, PA
2,175 addresses in warning area
Alert issued Wed, May 20 · 8:00 PM UTC
New Holland, PA
Alert issued Wed, May 20 · 8:01 PM UTC
Middleburg, VA
Alert issued Wed, May 20 · 8:05 PM UTC
Haymarket, VA
Alert issued Wed, May 20 · 8:12 PM UTC
Kinzers, PA
Alert issued Wed, May 20 · 8:16 PM UTC
White Hall, MD
Alert issued Wed, May 20 · 8:19 PM UTC
Stowe, PA
9,622 addresses in warning area
Alert issued Wed, May 20 · 8:29 PM UTC
Allentown, PA
Alert issued Wed, May 20 · 8:43 PM UTC
Boyertown, PA
Alert issued Wed, May 20 · 8:46 PM UTC
West Grove, PA
Alert issued Wed, May 20 · 8:50 PM UTC
Churchville, MD
Alert issued Wed, May 20 · 8:54 PM UTC
Edgewood, MD
Alert issued Wed, May 20 · 8:55 PM UTC
Philadelphia, PA
Alert issued Wed, May 20 · 9:10 PM UTC
Doylestown, PA
Alert issued Wed, May 20 · 9:15 PM UTC
Kennedyville, MD
Alert issued Wed, May 20 · 9:18 PM UTC
Chesapeake City, MD
Alert issued Wed, May 20 · 9:21 PM UTC
Bridgewater, NJ
Alert issued Wed, May 20 · 9:24 PM UTC
Wilmington, DE
Alert issued Wed, May 20 · 9:29 PM UTC
Pennsville, NJ
Alert issued Wed, May 20 · 9:35 PM UTC
Burlington, NJ
Alert issued Wed, May 20 · 9:41 PM UTC
Trenton, NJ
Alert issued Wed, May 20 · 9:52 PM UTC
Moorestown, NJ
Alert issued Wed, May 20 · 10:01 PM UTC
Perth Amboy, NJ
11,463 addresses in warning area
Alert issued Wed, May 20 · 10:04 PM UTC
Elizabeth, NJ
Alert issued Wed, May 20 · 10:07 PM UTC
Voorhees, NJ
Alert issued Wed, May 20 · 10:09 PM UTC
Brick, NJ
Alert issued Wed, May 20 · 10:12 PM UTC
Freehold, NJ
Alert issued Wed, May 20 · 10:23 PM UTC
New York, NY
Alert issued Wed, May 20 · 10:51 PM UTC
Lanoka Harbor, NJ
Alert issued Wed, May 20 · 10:58 PM UTC
A severe hail storm tracked through Mercersburg, PA on May 20, 2026, producing 1.83-inch stones and prompting repeated NWS warnings in the late afternoon and early evening. The storm sequence generated 42 NWS alerts from 1:03 PM to 6:58 PM EDT, with both radar-detected returns and a spotter-verified observation.
The storm initiated in the early afternoon and persisted into early evening. NWS issued 42 alerts across a roughly six-hour span, beginning at 1:03 PM and ending at 6:58 PM. Most alerts were labeled NWS warning only. At 4:50 PM a dual-polarization radar signature indicated hail-sized returns consistent with larger stones. A Skywarn spotter submitted a photograph and reported hail around 5:25 PM; the local storm report described the observation as spotter-verified 1-inch hail with time estimated from radar.
Radar and warning timelines show repeated hail detections across the Mercersburg warning area from mid-afternoon through early evening. The pattern included intermittent stronger returns near 4:50 PM and sustained, smaller-hail returns recorded through 6:58 PM. The spotter submission provides ground-truth imagery for the afternoon activity near the town center.
Field reports and radar returns indicate localized surface impact concentrated near Mercersburg between mid-afternoon and early evening. The Skywarn photo documents hail accumulation consistent with penny-sized stones at 5:25 PM in the Mercersburg vicinity. No additional local storm reports filed to the NWS from Mercersburg report structural collapse or large-scale vehicle damage tied to this event.
Dual-polarization radar showed a stronger return near 4:50 PM that did not correspond to multiple independent ground reports in the Mercersburg public record. Observations therefore point to uneven hail distribution across the warning area, with isolated pockets of measurable hail documented by the spotter and radar signatures.
Inspect roofs installed on properties in and immediately around Mercersburg first. Begin with sections facing the storm track and those near tree lines where hail can be funneled. Look for granular loss, pitting on asphalt shingles, and circular bruises on metal roofing. Photograph damage with time-stamped images and note exact parcel addresses for claims work.
Check parked vehicles and low-profile equipment documented within the Mercersburg warning area for paint damage and denting. Prioritize late-model vehicles and those parked outdoors during the 4:30 PM to 6:30 PM window. Skylights and polycarbonate panels may show impact fractures that are not immediately obvious from ground level.
Document all inspections against the warning area timeline issued by the NWS on May 20. Use the spotter image timestamp and the 4:50 PM radar return as verification anchors when compiling estimates. Maintain a conservative approach when assessing replacement versus repair on marginal shingle bruising; some hail signatures may not warrant full replacement.
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Address data is sourced from the US National Address Database (NOAA/USDOT). Inclusion of an address does not guarantee physical damage occurred. Confidence scores are radar-derived estimates. Data Accuracy Disclaimer