Right now
The most recent data we hold from NOAA arrived 4 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 July 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 36 recorded within 20 km of this point since 16 March 2026 — 25 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tropical Storm Warning issued July 21 at 10:09AM CDT by NWS New Orleans LA
Urban PEI: 262,709 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 24, 2026 · score 43 · 3.3 km
- May 24, 2026 · score 43 · 4.8 km
- May 23, 2026 · score 43 · 4.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.81/1 |
| Coordinates | 30.1670, -88.8240 |
| Nearest City | Biloxi (27 km) |
| Urban exposure index (PEI) | 262.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T15:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tropical Storm Warning_noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87a |
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: 2026-07-21T15:09:00.000Z.
First archived: 2026-07-21T15:13:07.174Z. 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 | Tropical Storm Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lower Lafourche; Southern Harrison; Southern Jackson and 13 more areas |
| Headline | Tropical Storm Warning issued July 21 at 10:09AM CDT by NWS New Orleans LA |
| Expires | 2026-07-21T18:15:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.003.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.021.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.022.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.008.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.011.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.013.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.020.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.019.1","noaa_urn:oid:2.49.0.1.840.0.d6d4f1aefd0ee11c35d69d5e3368a87ab563ff63.005.1","noaa_urn:oid:2.49.0.1.840.0.f449d95576e2e94751de7a2df5c349c5f1da404d.001.1","noaa_urn:oid:2.49.0.1.840.0.e677eec830b50f81340b523f251529d8224521a4.001.2","noaa_urn:oid:2.49.0.1.840.0.e677eec830b50f81340b523f251529d8224521a4.004.1","noaa_urn:oid:2.49.0.1.840.0.e677eec830b50f81340b523f251529d8224521a4.002.2","noaa_urn:oid:2.49.0.1.840.0.e677eec830b50f81340b523f251529d8224521a4.003.1","noaa_urn:oid:2.49.0.1.840.0.7f87a90dca8b3bf94ae137c1bbb59ee49f68ba28.001.1","noaa_urn:oid:2.49.0.1.840.0.7f87a90dca8b3bf94ae137c1bbb59ee49f68ba28.002.1"] |
Safety Information
During a tropical cyclone: shelter in a sturdy interior room away from windows. Stock emergency supplies including water, food, medications, and flashlights. Do not venture outdoors during the eye of the storm. After passage, beware of downed power lines, flooding, and structural damage. Follow official guidance for evacuation and shelter.
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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