Flash Flood Warning Issued for Philadelphia Area Through 3:30 AM EDT
This alert is no longer in effect.
NOAA issued it on August 17, 2026, 7 days 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 3:30 AM EDT Monday due to heavy rain and ongoing flooding.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Philadelphia metropolitan area and surrounding counties in PA and NJ
- Issued
- August 17, 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 7 days ago; use the issuing agency's live warning service for current conditions in Philadelphia metropolitan area and surrounding counties in PA and NJ.
Alert Details
Flash Flood Warning issued by NWS Mount Holly NJ. Effective from August 16 at 11:38 PM EDT until August 17 at 3:30 AM EDT. Severity: Severe. Urgency: Immediate. Certainty: Likely.
Affected Areas
Northwestern Burlington County NJ, Northwestern Camden County NJ, Northwestern Gloucester County NJ, Southeastern Bucks County PA, Delaware County PA, Southeastern Montgomery County PA, and Philadelphia County PA. Specific locations that may experience flash flooding include Philadelphia, Camden, Gloucester City, Cherry Hill, Bensalem, Mount Laurel, Chester, Willingboro, Deptford, Voorhees, West Deptford and Florence.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
Expected Conditions
Doppler radar indicated heavy rain across the warned area with 0.5 to 1 inch of rain fallen. Expected rainfall rate is 2 to 3 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5 inches are possible. Hazard is flash flooding caused by heavy rain.
Timeline
Alert effective August 16 at 11:38 PM EDT. Expires and ends August 17 at 3:30 AM EDT.
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 (1,220 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 17, 2026.
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