This alert expired on 6 July 2026 at 22:47 UTC. It is kept here as a record.
It is the 5th strongest of the 351 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 33 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 6 at 6:37PM EDT until July 6 at 6:45PM EDT by NWS Mount Holly NJ
An estimated 27,266,462 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 28, 2026 · score 52 · 1.5 km
- August 28, 2026 · score 46 · 2.2 km
- March 12, 2026 · score 52 · 3.7 km
How we know
Confirmed by 14 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 40.5559, -74.1536 |
| Nearest City | Great Kills (1 km) |
| Population Exposed | 27.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T22:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.2fbc81df07ad2fab628bcd3150c82adc |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Burlington, NJ; Bucks, PA; Philadelphia, PA; Fairfield, CT; Monmouth, NJ; Ocean, NJ |
| Headline | Flood Warning issued July 6 at 6:37PM EDT until July 6 at 6:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-06T18:47:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2fbc81df07ad2fab628bcd3150c82adc44b21843.001.1","noaa_urn:oid:2.49.0.1.840.0.2e64886bfeec4cab2b5bc7a0418bd8d81d7d01a6.001.1","noaa_urn:oid:2.49.0.1.840.0.20f33ad7d4bbc2fce611cbde4a49a179cc45ea9f.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 3.52 |
| Iem Unit | Inch |
| Iem City | Spring Lake Heights |
| Iem County | Monmouth |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Mesonet station 3714D Spring Lake Heights. |
| MergedSources | [{"id":"iem_R_40.180_-74.050_1783371360000","source":"iem","severity":"low","severityValue":25,"timestamp":1783371360000,"latitude":40.18,"longitude":-74.05},{"id":"iem_R_40.810_-74.740_1783369800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783369800000,"latitude":40.81,"longitude":-74.74},{"id":"iem_F_40.730_-73.460_1783356720000","source":"iem","severity":"low","severityValue":25,"timestamp":1783356720000,"latitude":40.73,"longitude":-73.46},{"id":"iem_R_40.190_-74.040_1783373100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783373100000,"latitude":40.19,"longitude":-74.04},{"id":"iem_R_40.210_-74.060_1783372980000","source":"iem","severity":"low","severityValue":25,"timestamp":1783372980000,"latitude":40.21,"longitude":-74.06},{"id":"iem_R_40.370_-74.830_1783372500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783372500000,"latitude":40.37,"longitude":-74.83},{"id":"iem_R_40.200_-74.050_1783372740000","source":"iem","severity":"low","severityValue":25,"timestamp":1783372740000,"latitude":40.2,"longitude":-74.05},{"id":"iem_F_40.090_-74.220_1783357500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783357500000,"latitude":40.09,"longitude":-74.22},{"id":"iem_F_40.580_-73.990_1783358100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783358100000,"latitude":40.58,"longitude":-73.99},{"id":"iem_F_40.230_-74.000_1783359000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783359000000,"latitude":40.23,"longitude":-74},{"id":"iem_F_40.740_-73.420_1783361100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783361100000,"latitude":40.74,"longitude":-73.42},{"id":"iem_R_40.160_-74.600_1783372800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783372800000,"latitude":40.16,"longitude":-74.6},{"id":"iem_R_40.150_-74.040_1783372800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783372800000,"latitude":40.15,"longitude":-74.04}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Great Kills (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.