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.
4 other detections within 20 km in the last 24 hours, the nearest 18 km from here.
This alert expired on 13 September 2026 at 00:00 UTC. It is kept here as a record.
It is the 12th strongest of the 19 detections recorded within 20 km of this point since 15 June 2026. The last comparable one was on 31 August 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 12 at 4:15PM MST until September 12 at 5:00PM MST by NWS Phoenix AZ
Urban PEI: 1,193,537 within a heuristic 50 km radius; not unique people.
Nearby, since 15 June 2026
- July 25, 2026 · score 48 · 3.9 km
- July 14, 2026 · score 48 · 11.6 km
- August 31, 2026 · score 52 · 13.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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 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) | 46 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 33.9095, -112.2988 |
| Nearest City | Anthem (14 km) |
| Urban exposure index (PEI) | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T23:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d4f3658d9c2d3975ea405d42b60a77dd4517ac91.001.1 |
Physical priority index · v4 (historical). 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: 2026-09-12T23:15:00.000Z.
First archived: 2026-09-12T23:20:31.337Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Maricopa, AZ; Yavapai, AZ |
| Headline | Severe Thunderstorm Warning issued September 12 at 4:15PM MST until September 12 at 5:00PM MST by NWS Phoenix AZ |
| Expires | 2026-09-12T17:00:00-07:00 |
| SenderName | NWS Phoenix AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d4f3658d9c2d3975ea405d42b60a77dd4517ac91.001.1","noaa_urn:oid:2.49.0.1.840.0.976015051479898f350a213a7d3222fed317d32d.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
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