Right now
The most recent data we hold from NOAA arrived 88 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 21 May 2026 at 00:30 UTC. It is kept here as a record.
It is the 8th strongest of the 25 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 20 at 7:58PM EDT until May 20 at 8:30PM EDT by NWS Upton NY
Urban PEI: 192,625 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- June 7, 2026 · score 43 · 6.1 km
- July 15, 2026 · score 39 · 6.8 km
- July 18, 2026 · score 52 · 10.5 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 40.1707, -73.5813 |
| Nearest City | Asbury Park (37 km) |
| Urban exposure index (PEI) | 192.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T23:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.0c6b544f51d3ed35d9e6efa26f0e4495 |
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: 2026-05-20T23:58:00.000Z.
First archived: 2026-05-21T00:28:37.398Z. 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 | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | South Shore Bays from Jones Inlet through Shinnecock Bay; Moriches Inlet NY to Montauk Point NY out 20 NM; Fire Island Inlet NY to Moriches Inlet NY out 20 NM; Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 NM; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 NM; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ from 20 to 60 NM |
| Headline | Special Marine Warning issued May 20 at 7:58PM EDT until May 20 at 8:30PM EDT by NWS Upton NY |
| Expires | 2026-05-20T20:30:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0c6b544f51d3ed35d9e6efa26f0e449571d75101.001.1","noaa_urn:oid:2.49.0.1.840.0.afa5b2295d6861eac6a6ad2bcf40e15446ded6f9.001.1"] |
| Iem TypeSummary | D |
| Iem City | Atlantic Highlands |
| Iem County | Monmouth |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Large tree down blocking the road. Time approximate from KDIX radar. |
| MergedSources | [{"id":"iem_D_40.620_-74.020_1779318600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779318600000,"latitude":40.62,"longitude":-74.02},{"id":"iem_D_40.610_-73.970_1779316740000","source":"iem","severity":"low","severityValue":25,"timestamp":1779316740000,"latitude":40.61,"longitude":-73.97},{"id":"iem_M_40.660_-74.070_1779318000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779318000000,"latitude":40.66,"longitude":-74.07},{"id":"iem_G_40.440_-74.200_1779316020000","source":"iem","severity":"low","severityValue":25,"timestamp":1779316020000,"latitude":40.44,"longitude":-74.2},{"id":"iem_D_40.330_-73.980_1779317580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779317580000,"latitude":40.33,"longitude":-73.98},{"id":"iem_D_40.420_-74.040_1779317580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779317580000,"latitude":40.42,"longitude":-74.04}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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.
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