Right now
The most recent data we hold from NOAA arrived 5 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 23 June 2026 at 09:45 UTC. It is kept here as a record.
No stronger detection stands among the 45 recorded within 20 km of this point since 17 March 2026 — 26 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 23 at 4:01AM EDT until June 23 at 5:45AM EDT by NWS Upton NY
An estimated 8,579,969 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 21, 2026 · score 52 · 4.8 km
- July 21, 2026 · score 52 · 7.7 km
- June 6, 2026 · score 52 · 8.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 85% |
| Coordinates | 41.1260, -73.6161 |
| Nearest City | North Stamford (7 km) |
| Population Exposed | 8.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T08:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.e0b16d37f910bc4e83ecfe0769f306dd |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Bergen, NJ; Passaic, NJ; Rockland, NY; New London, CT; Morris, NJ; Sussex, NJ |
| Headline | Flash Flood Warning issued June 23 at 4:01AM EDT until June 23 at 5:45AM EDT by NWS Upton NY |
| Expires | 2026-06-23T05:45:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e0b16d37f910bc4e83ecfe0769f306dd8b964973.002.1","noaa_urn:oid:2.49.0.1.840.0.5050c1383c81501cc9d5f563d011250dff8c623f.001.1","noaa_urn:oid:2.49.0.1.840.0.342e8eec3b8711edeb85a9e3e59702faae50938a.001.1"] |
| Iem TypeSummary | F |
| Iem City | Harrison |
| Iem County | Hudson |
| Iem State | NJ |
| Iem Wfo | OKX |
| Iem Remark | Flooded basement. |
| MergedSources | [{"id":"iem_F_40.750_-74.150_1782184440000","source":"iem","severity":"low","severityValue":25,"timestamp":1782184440000,"latitude":40.75,"longitude":-74.15}] |
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.
Want to know when something happens near North Stamford?
Calamity.live data shows a weather event with CalamityScore 52/100, near North Stamford (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.