Right now
The most recent data we hold from HEAT GOV arrived 2 hours ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
This alert is in force until 12 September 2026, 18:00 UTC.
It is one of only 4 we have recorded within 20 km of this point since 12 June 2026. The last comparable one was on 2 September 2026. One more was recorded here in the fortnight before it.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 109 expected. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...From noon to 7 PM CDT Saturday. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to th...
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 49 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 49% |
| Coordinates | 35.1785, -95.0076 |
| Nearest City | Fort Smith (60 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-12T17:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-12T12:00:00-05:00 |
| Expires | 2026-09-12T13:00:00-05:00 |
| AreaDesc | North and Central Sebastian; Southern Crawford; Central and Southern Franklin; Pushmataha; Choctaw; Okfuskee; Okmulgee; Muskogee; McIntosh; Pittsburg; Haskell; Latimer; Northern Le Flore; Central and Southern Sequoyah |
| SenderName | NWS Tulsa OK |
| ZonesUsedForCentroid | 7 |
| ZoneCount | 14 |
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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