Right now
The most recent data we hold from NOAA arrived 11 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 29 July 2026 at 06:45 UTC. It is kept here as a record.
It is the 14th strongest of the 53 detections recorded within 20 km of this point since 12 June 2026. The last comparable one was on 28 July 2026. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 29 at 12:02AM EDT until July 29 at 2:45AM EDT by NWS Mount Holly NJ
Urban PEI: 3,796,820 within a heuristic 50 km radius; not unique people.
Nearby, since 12 June 2026
- July 21, 2026 · score 76 · 3.7 km
- July 29, 2026 · score 52 · 3.9 km
- June 23, 2026 · score 52 · 8.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 41.0838, -74.4211 |
| Nearest City | West Milford (7 km) |
| Urban exposure index (PEI) | 3.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-29T04:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.f56c1ca02927e52ffca5667ba2e28af6 |
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: 2026-07-29T04:02:00.000Z.
First archived: 2026-07-29T04:15:38.061Z. 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 | Morris, NJ; Monmouth, NJ; Ocean, NJ; Essex, NJ; Hudson, NJ; Union, NJ; New York, NY; Richmond, NY and 4 more areas |
| Headline | Flash Flood Warning issued July 29 at 12:02AM EDT until July 29 at 2:45AM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-29T02:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f56c1ca02927e52ffca5667ba2e28af62d43d16f.001.1","noaa_urn:oid:2.49.0.1.840.0.3fdbc99b2707ec42a6463c7b328961a656bbc77c.001.1","noaa_urn:oid:2.49.0.1.840.0.ab80855273feb5110e4ab9e6cf313f81ad7b8790.001.1","noaa_urn:oid:2.49.0.1.840.0.1e6e248b816683a15fa501e7799701f4dbe2acc1.001.1","noaa_urn:oid:2.49.0.1.840.0.803e964958d3a3877808668a00e1d944d3f3ad37.001.1","noaa_urn:oid:2.49.0.1.840.0.2fbb6bb3f3d7c57e876b40efa1787fd21dccd99a.001.1","noaa_urn:oid:2.49.0.1.840.0.b764d9fd2afc0b5317defb11d3dc243178689ed3.001.1"] |
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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