Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 6 August 2026 at 07:45 UTC. It is kept here as a record.
It is the 127th strongest of the 191 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 5 August 2026. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 5 at 11:40PM EDT until August 6 at 3:45AM EDT by NWS Mount Holly NJ
Urban PEI: 3,735,537 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 6, 2026 · score 46 · 0.0 km
- March 12, 2026 · score 52 · 2.8 km
- March 12, 2026 · score 52 · 6.1 km
How we know
13 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 46 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 40.3426, -75.0209 |
| Nearest City | Ewing (20 km) |
| Urban exposure index (PEI) | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-06T03:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.96c5a690eb753ae371be7ee8032f6c12 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-08-06T03:40:00.000Z.
First archived: 2026-08-06T04:15:45.890Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Hunterdon, NJ; Morris, NJ; Somerset, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA; Bucks, PA; Chester, PA; Delaware, PA; Montgomery, PA |
| Headline | Flash Flood Warning issued August 5 at 11:40PM EDT until August 6 at 3:45AM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-06T03:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.96c5a690eb753ae371be7ee8032f6c12b60a823f.001.1","noaa_urn:oid:2.49.0.1.840.0.884585f8a34c287e35bed90b3ab2295554ce526a.001.1","noaa_urn:oid:2.49.0.1.840.0.7f5afd9869e4ae84b4879881dc02428ed9193b44.001.1"] |
| Iem TypeSummary | F |
| Iem City | Avenel |
| Iem County | Middlesex |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | A couple reports of flooding on US-1 South and US-9 North between State Route 35 and Rodgers Street/Inman Avenue. |
| MergedSources | [{"id":"iem_F_40.130_-75.200_1785985200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785985200000,"latitude":40.13,"longitude":-75.2},{"id":"iem_F_40.130_-75.520_1785978300000","source":"iem","severity":"low","severityValue":25,"timestamp":1785978300000,"latitude":40.13,"longitude":-75.52},{"id":"iem_R_40.580_-74.280_1785968100000","source":"iem","severity":"low","severityValue":25,"timestamp":1785968100000,"latitude":40.58,"longitude":-74.28},{"id":"iem_R_39.990_-75.000_1785974400000","source":"iem","severity":"low","severityValue":25,"timestamp":1785974400000,"latitude":39.99,"longitude":-75},{"id":"iem_F_40.130_-75.220_1785985200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785985200000,"latitude":40.13,"longitude":-75.22},{"id":"iem_F_40.080_-75.310_1785981000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785981000000,"latitude":40.08,"longitude":-75.31},{"id":"iem_F_40.570_-74.330_1785968700000","source":"iem","severity":"low","severityValue":25,"timestamp":1785968700000,"latitude":40.57,"longitude":-74.33},{"id":"iem_F_40.600_-74.290_1785969960000","source":"iem","severity":"low","severityValue":25,"timestamp":1785969960000,"latitude":40.6,"longitude":-74.29},{"id":"iem_R_40.100_-74.870_1785974880000","source":"iem","severity":"low","severityValue":25,"timestamp":1785974880000,"latitude":40.1,"longitude":-74.87},{"id":"iem_F_40.120_-75.480_1785979200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785979200000,"latitude":40.12,"longitude":-75.48},{"id":"iem_R_39.900_-75.440_1785975000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785975000000,"latitude":39.9,"longitude":-75.44},{"id":"iem_F_40.580_-74.290_1785966000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785966000000,"latitude":40.58,"longitude":-74.29}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Review the area, threshold and delivery channel in your account.
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