Right now
The most recent data we hold from HEAT GOV arrived 7 hours ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 September 2026 at 00:00 UTC. It is kept here as a record.
It is the 4th strongest of the 12 detections recorded within 20 km of this point since 1 July 2026. The last comparable one was on 15 September 2026. 8 more were recorded here in the fortnight before it.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 110 expected. * WHERE...Portions of central Mississippi, southeast Arkansas, and northeast Louisiana. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat related illnesses.
Urban PEI: 74,184 within a heuristic 50 km radius; not unique people.
Nearby, since 1 July 2026
- July 13, 2026 · score 34 · 7.2 km
- September 13, 2026 · score 28 · 23.3 km
- September 2, 2026 · score 28 · 23.3 km
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 32 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 32 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 32.6922, -90.5741 |
| Nearest City | Clinton (46 km) |
| Urban exposure index (PEI) | 74.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-16T16:30:00.000Z |
| Source | http://www.weather.gov |
Physical priority index · v5. 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: heat_gov. Occurrence: 2026-09-16T16:30:00.000Z.
First archived: 2026-09-15T16:25:24.155Z. Material modification: 2026-09-16T17:02:08.607Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-16T17:02:08.607Z · data_change
Index 32 → 32; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-16T11:30:00-05:00 |
| Expires | 2026-09-16T19:00:00-05:00 |
| AreaDesc | Ashley; Chicot; Morehouse; West Carroll; East Carroll; Richland; Madison; Franklin; Catahoula; Tensas; Concordia; Bolivar; Sunflower; Leflore; Grenada; Carroll; Montgomery; Webster; Clay; Lowndes; Choctaw; Oktibbeha; Washington; Humphreys; Holmes; Attala; Issaquena; Sharkey; Yazoo; Madison; Warren; Hinds; Rankin; Claiborne; Copiah; Simpson; Jefferson; Adams; Franklin; Lincoln; Lawrence; Jefferson Davis; Marion |
| SenderName | NWS Jackson MS |
| ZonesUsedForCentroid | 11 |
| ZoneCount | 43 |
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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