Right now
The most recent data we hold from NOAA arrived 8 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
9 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 17 September 2026 at 01:45 UTC. It is kept here as a record.
It is the 29th strongest of the 97 detections recorded within 20 km of this point since 15 June 2026. Another comparable one was recorded here earlier the same day. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 16 at 6:13PM MST until September 16 at 6:45PM MST by NWS Tucson AZ
Urban PEI: 833,614 within a heuristic 50 km radius; not unique people.
Nearby, since 15 June 2026
- September 17, 2026 · score 41 · 0.0 km
- August 28, 2026 · score 48 · 8.8 km
- September 12, 2026 · score 41 · 9.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 41 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) | 41 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 32.3800, -111.0760 |
| Nearest City | Casas Adobes (10 km) |
| Urban exposure index (PEI) | 833.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-17T01:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.28e05276ef18ded5c70d78c4f166753081ff2a77.001.1 |
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: noaa. Occurrence: 2026-09-17T01:13:00.000Z.
First archived: 2026-09-17T01:14:44.282Z. 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 | Pima, AZ |
| Headline | Severe Thunderstorm Warning issued September 16 at 6:13PM MST until September 16 at 6:45PM MST by NWS Tucson AZ |
| Expires | 2026-09-16T18:45:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 0.74 |
| Iem Unit | Inch |
| Iem City | 11 SSE Picture Rocks |
| Iem County | Pima |
| Iem State | AZ |
| Iem Wfo | TWC |
| Iem Remark | 0.74 inches in 20 mins. |
| MergedSources | [{"id":"iem_R_32.330_-111.030_1789607460000","source":"iem","severity":"low","severityValue":25,"timestamp":1789607460000,"latitude":32.33,"longitude":-111.03},{"id":"iem_R_32.200_-111.170_1789606680000","source":"iem","severity":"low","severityValue":25,"timestamp":1789606680000,"latitude":32.2,"longitude":-111.17}] |
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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