Right now
The most recent data we hold from NOAA arrived 2 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 18 June 2026 at 17:45 UTC. It is kept here as a record.
It is the 7th strongest of the 62 detections recorded within 20 km of this point since 2 April 2026. 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: Flash Flood Warning issued June 18 at 8:44AM CDT until June 18 at 12:45PM CDT by NWS Jackson MS
Urban PEI: 20,480 within a heuristic 50 km radius; not unique people.
Nearby, since 2 April 2026
- May 8, 2026 · score 34 · 8.6 km
- June 22, 2026 · score 34 · 18.2 km
- June 21, 2026 · score 39 · 19.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 30.7675, -90.4860 |
| Nearest City | Hammond (30 km) |
| Urban exposure index (PEI) | 20.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T13:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.54e41194766f1cd34c50ac0bc4c3d21a |
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: 2026-06-18T13:44:00.000Z.
First archived: 2026-06-18T13:49:51.865Z. 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 | Catahoula, LA; Concordia, LA; Tensas, LA; Adams, MS; Claiborne, MS; Franklin, MS; Jefferson, MS; St. Tammany, LA; Washington, LA; Pearl River, MS; Perry, MS; Stone, MS and 8 more areas |
| Headline | Flash Flood Warning issued June 18 at 8:44AM CDT until June 18 at 12:45PM CDT by NWS Jackson MS |
| Expires | 2026-06-18T12:45:00-05:00 |
| SenderName | NWS Jackson MS |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.54e41194766f1cd34c50ac0bc4c3d21ad9b5e033.001.1","noaa_urn:oid:2.49.0.1.840.0.8763349299bea910c961b9cca74c8a3cc4b78a37.001.1","noaa_urn:oid:2.49.0.1.840.0.e49d3a5500f475fa50cb8c877612a6825ba8606c.001.1","noaa_urn:oid:2.49.0.1.840.0.1cb62a23ad91c1032d86d50bc7cc4a2c1451bde0.001.1","noaa_urn:oid:2.49.0.1.840.0.708dc37343a22c71f390bf9708d59163c210db11.001.1","noaa_urn:oid:2.49.0.1.840.0.bc7c867a1bb130ae3eaa643ec7710be10f1d0540.001.1","noaa_urn:oid:2.49.0.1.840.0.c7d0340a41ff8bca5dc1f881e0166ff88bfc65fa.001.1","noaa_urn:oid:2.49.0.1.840.0.f1501308994ff09b02baf099dcb8f85f644cf6e7.001.1","noaa_urn:oid:2.49.0.1.840.0.a58ab111ed72efcf7b1892f3b62511ed86444a36.001.1","noaa_urn:oid:2.49.0.1.840.0.eb3d3302c9a8c204dc0f2563060d68daa7870d72.001.1","noaa_urn:oid:2.49.0.1.840.0.7e70f4455c8fd731d7371c2dc32b9feafaa1cef5.001.1","noaa_urn:oid:2.49.0.1.840.0.44d8adb78672b296ddde0604476c9fe1e5752799.001.1","noaa_urn:oid:2.49.0.1.840.0.d078b8845083b1f921d0a17dc9c90c8eaecf6b8f.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 46 |
| Iem Unit | MPH |
| Iem City | 13 NNE Metairie |
| Iem County | GMZ531 |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | The Weatherflow mesonet on the Lake Pontchartrain Causeway measured a thunderstorm wind gust of 46 mph. |
| MergedSources | [{"id":"iem_M_30.180_-90.130_1781776260000","source":"iem","severity":"low","severityValue":25,"timestamp":1781776260000,"latitude":30.18,"longitude":-90.13}] |
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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