Right now
The most recent data we hold from NOAA arrived 6 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 22 May 2026 at 22:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 69 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 21 May 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 22 at 3:43PM CDT until May 22 at 5:15PM CDT by NWS New Orleans LA
Urban PEI: 866,520 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 22, 2026 · score 48 · 2.5 km
- August 27, 2026 · score 48 · 4.3 km
- May 24, 2026 · score 48 · 5.1 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 30.0483, -89.7878 |
| Nearest City | Chalmette (21 km) |
| Urban exposure index (PEI) | 866.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-22T20:43:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ef88c55baafa8c376dd32ae84926766852db406a.001.1 |
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: 2026-05-22T20:43:00.000Z.
First archived: 2026-05-22T21:24:15.480Z. 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 | Lake Pontchartrain; Lake Borgne |
| Headline | Special Marine Warning issued May 22 at 3:43PM CDT until May 22 at 5:15PM CDT by NWS New Orleans LA |
| Expires | 2026-05-22T17:15:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 41 |
| Iem Unit | MPH |
| Iem City | 3 E Long Beach |
| Iem County | Harrison |
| Iem State | MS |
| Iem Wfo | LIX |
| Iem Remark | The Weatherflow mesonet XGPT in Gulfport on Highway 90 measured a thunderstorm wind gusts of 41 mph or 36 knots. |
| MergedSources | [{"id":"iem_D_30.570_-90.240_1779480300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779480300000,"latitude":30.57,"longitude":-90.24},{"id":"iem_M_30.200_-90.120_1779478860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779478860000,"latitude":30.2,"longitude":-90.12},{"id":"iem_M_30.360_-89.120_1779466200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779466200000,"latitude":30.36,"longitude":-89.12}] |
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.
Review the area, threshold and delivery channel in your account.
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