Right now
The most recent data we hold from NOAA arrived 2 hours 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 18 June 2026 at 15:00 UTC. It is kept here as a record.
It is the 39th strongest of the 60 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 18 at 7:00AM CDT until June 18 at 10:00AM CDT by NWS New Orleans LA
Urban PEI: 20,480 within a heuristic 50 km radius; not unique people.
Nearby, since 8 March 2026
- March 9, 2026 · score 22 · 8.3 km
- March 8, 2026 · score 22 · 8.3 km
- March 11, 2026 · score 39 · 8.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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) | 28 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 30.4967, -90.2611 |
| Nearest City | Hammond (19 km) |
| Urban exposure index (PEI) | 20.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T12:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.a1ab93d27c1aecf60d2aebf9856259bf |
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: 2026-06-18T12:00:00.000Z.
First archived: 2026-06-18T12:13:45.114Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | St. Tammany, LA; Hancock, MS; Pearl River, MS; Hancock, MS; Harrison, MS; Pearl River, MS; Jefferson, LA; Orleans, LA; St. Charles, LA and 5 more areas |
| Headline | Flash Flood Warning issued June 18 at 7:00AM CDT until June 18 at 10:00AM CDT by NWS New Orleans LA |
| Expires | 2026-06-18T10:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a1ab93d27c1aecf60d2aebf9856259bf0ca7e977.001.1","noaa_urn:oid:2.49.0.1.840.0.1242e4f2217d15df99e4e87d236e59a942d82cdd.001.1","noaa_urn:oid:2.49.0.1.840.0.7e70f4455c8fd731d7371c2dc32b9feafaa1cef5.001.1","noaa_urn:oid:2.49.0.1.840.0.f1606ae6708debd0923f9865c553ec30a7933e04.001.1","noaa_urn:oid:2.49.0.1.840.0.44d8adb78672b296ddde0604476c9fe1e5752799.001.1","noaa_urn:oid:2.49.0.1.840.0.933ac47ee06354eb409cf258a07b6f9c75fb762b.001.1","noaa_urn:oid:2.49.0.1.840.0.6b01a5a35ecef6fb09604aa726f2ccb1043f9a61.001.1","noaa_urn:oid:2.49.0.1.840.0.b34abe625e3d6164f574d7b12943eec85f765f15.001.1","noaa_urn:oid:2.49.0.1.840.0.855d0be070a1a0306b165fd87f37528142431409.001.1","noaa_urn:oid:2.49.0.1.840.0.abd838b68368a0110fcc5e9460b2d61bd29ffe1a.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
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