This alert is in force until 4 September 2026, 04:45 UTC.
It is the 23rd strongest of the 36 detections recorded within 20 km of this point since 10 April 2026. The last comparable one was on 3 September 2026.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 108 expected. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from noon to 7 PM CDT Friday. * IMPACTS...
An estimated 226,011 people live within 50 km of this point.
Nearby, since 10 April 2026
- July 5, 2026 · score 43 · 5.0 km
- July 12, 2026 · score 43 · 9.7 km
- July 5, 2026 · score 48 · 14.0 km
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 68 % 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) | 37 / 100 |
| Our confidence | 68% |
| Coordinates | 35.9439, -95.4513 |
| Nearest City | Muskogee (23 km) |
| Population Exposed | 226.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T17:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-04T12:00:00-05:00 |
| Expires | 2026-09-03T23:45:00-05:00 |
| AreaDesc | North and Central Sebastian; Southern Crawford; Central and Southern Franklin; Southern Sebastian; Washington; Nowata; Craig; Ottawa; Pawnee; Tulsa; Rogers; Mayes; Creek; Okfuskee; Okmulgee; Wagoner; Muskogee; McIntosh; Haskell; Western Osage; Northern Le Flore; Northeast Osage; Central and Southern Sequoyah; Central Le Flore; Southeast Osage |
| SenderName | NWS Tulsa OK |
| ZonesUsedForCentroid | 9 |
| ZoneCount | 25 |
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.
Want to know when something happens near Muskogee?
Calamity.live data shows a weather event with CalamityScore 37/100, near Muskogee (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.