Flash Flood Warning Issued for Philadelphia Region and Nearby Counties
This alert is no longer in effect.
NOAA issued it on June 2, 2026, 2 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Mount Holly has issued a Flash Flood Warning for parts of southeastern Pennsylvania and southern New Jersey until 9:45 PM EDT on May 20, 2026, due to thunderstorms producing heavy rain.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Southeastern Pennsylvania and Southern New Jersey
- Issued
- June 2, 2026
- Issuing authority
- NWS Mount Holly NJ
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 2 months ago; use the issuing agency's live warning service for current conditions in Southeastern Pennsylvania and Southern New Jersey.
Alert Details
A Flash Flood Warning (FFW) has been issued by the National Weather Service in Mount Holly NJ. The alert is effective from May 20, 2026 at 5:40 PM EDT and expires May 20, 2026 at 9:45 PM EDT. Severity is listed as Severe with urgency Immediate and certainty Likely.
Affected Areas
The warning covers Northwestern Burlington County in southern New Jersey, Northwestern Camden County in southern New Jersey, North Central Gloucester County in southern New Jersey, Southeastern Bucks County in southeastern Pennsylvania, Delaware County in southeastern Pennsylvania, Southeastern Montgomery County in southeastern Pennsylvania, and Philadelphia County in southeastern Pennsylvania.
What You Should Do
Residents should turn around and avoid flooded roads, as most flood deaths occur in vehicles.
Expected Conditions
Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 0.5 inches of rain have fallen with an expected rainfall rate of 1 to 2 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5 inches are possible. Flash flooding is ongoing or expected to begin shortly. Hazard includes flash flooding caused by thunderstorms impacting small creeks and streams, urban areas, highways, streets, underpasses, and other drainage and low lying areas.
Timeline
The warning is in effect from 5:40 PM EDT until 9:45 PM EDT on May 20, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,409 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to June 2, 2026.
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