This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Baltimore County Area Flooding — August 2026 →
Flash Flood Warning issued August 5 at 2:50PM EDT until August 5 at 7:00PM EDT by NWS Mount Holly NJ
This is a severe-significance flash flood warning event affecting Hunterdon, NJ; Mercer, NJ; Bucks, PA, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flash Flood Warning
- Extent
- ≈ 319,183 acres
- Began
- To end
Hazard details
- Flash-flood damage threat
- CONSIDERABLE
Damage signals as reported by NOAA / National Weather Service — verbatim, not an estimate.
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Affected area map
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (Hunterdon, NJ; Mercer, NJ; Bucks, PA), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Hunterdon, NJ; Mercer, NJ; Bucks, PA · ≈ 500 sq mi reported extent · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
Restoration help near this event
Tap your city for a vetted local pro on that service, answered 24/7. Where we don't have a nearby city page yet, the step-by-step guides cover what to do first.
Water damage restoration
What to do now
Mold remediation
What to do now
Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Storm report NWS PHI storm report
FLASH FLOOD — 1 NNW Croydon, PA
Flooding on I-95 southbound 2 miles north of Exit 37. There is a lane restriction.
- Storm report NWS PHI storm report
FLASH FLOOD — 1 WNW Fairless Hills, PA
Oxford Valley Road flooded just south of Lincoln Highway.
- Storm report NWS PHI storm report
FLASH FLOOD — 1 NNW Olney - Philadelp, PA
West Cheltenham Avenue flooded.
- Storm report NWS PHI storm report
FLASH FLOOD — 1 E Eastwick, PA
Flooding on I-95 southbound just south of Exit 12A. There is a lane restriction.
Show 5 earlier updates
- NWS PHI storm report Storm report
- NWS Mount Holly NJ Bulletin
- Central New Jersey News News
Flood threat grows as Central Jersey faces days of rain, storms
- app.com News
Flash floods possible as heavy rain hits NJ; when will rain end?
- NJ.com News
N.J. weather: Flood watch issued for 17 counties with heavy rain, thunderstorms in forecast
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.