Severe Thunderstorm Warning Issued for Philadelphia Region
According to the U.S. Census Bureau's American Community Survey (ACS) 5-year estimates, the CDC PLACES population-level health analysis, and the CMS Hospital Compare quality data, Areazine publishes editorial articles drawing on more than 19,000 U.S. city profiles. See our methodology for full source attribution and refresh cadence.
NWS Mount Holly NJ has issued a Severe Thunderstorm Warning for parts of Delaware, New Jersey, and Pennsylvania until 6:15 PM EDT.
What this NWS weather alert tells you, and what most readers miss
This notice was issued by NOAA on June 2, 2026 and geographically references Philadelphia Region. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken — "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to — Weather Alerts — determines the regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action — a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.
For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Severe Thunderstorm Warning, Philadelphia Region) map to related alerts in the same area of risk — browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.
Alert Details
A Severe Thunderstorm Warning (SVR) has been issued by the National Weather Service in Mount Holly NJ. The alert is effective from May 20 at 5:29 PM EDT until May 20 at 6:15 PM EDT.
Affected Areas
The warning covers Northern New Castle County in northern Delaware; Northwestern Salem County, Northwestern Camden County, and Gloucester County in southern New Jersey; and Southeastern Chester County, Southwestern Philadelphia County, and Delaware County in southeastern Pennsylvania. Impacted locations include Philadelphia, Camden, Wilmington, Newark, West Chester, Gloucester City, Chester, Deptford, West Deptford, Glassboro, Pennsville, Bellmawr, Yeadon, Westtown, Woodbury, Pitman, Clayton, Carneys Point, Folcroft, and Swarthmore.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 5:28 PM EDT, a severe thunderstorm was located over Ashland, or 8 miles northwest of Wilmington, moving east at 30 mph. Radar indicated 60 mph wind gusts. Damage to roofs, siding, trees, and power lines is possible.
Timeline
The warning is in effect from May 20 at 5:29 PM EDT and expires May 20 at 6:15 PM EDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Tornado Warning Issued for Columbia, Marquette and Sauk Counties in Wisconsin
NOAA · June 24, 2026
Special Marine Warning Issued for Lake Michigan from Sturgeon Bay to Sheboygan
NOAA · June 24, 2026
Severe Thunderstorm Warning Issued for Cass, Lancaster, Sarpy, Saunders Counties in Nebraska
NOAA · June 24, 2026
Frequently Asked Questions
Common questions about this NWS weather alert.
What is this NWS weather alert about? ▾
Which agency issued this alert? ▾
How severe is this alert? ▾
What area is affected? ▾
Where can I find more Weather Alerts updates? ▾
Primary source data
EPA Outdoor Air Quality Data
Federal monitoring network — every measurement we report
AirNow (EPA / NOAA)
Real-time AQI for every monitored U.S. location
National Weather Service
Active watches, warnings, and advisories — NOAA
CDC Air Quality & Health
Health-impact reference behind every AQI category