Right now
The most recent data we hold from NOAA arrived 5 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 <1 km from here.
This alert expired on 9 September 2026 at 00:45 UTC. It is kept here as a record.
It is the 6th strongest of the 27 detections recorded within 20 km of this point since 17 April 2026. The last comparable one was on 8 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 8 at 7:22PM CDT until September 8 at 7:45PM CDT by NWS Des Moines IA
An estimated 47,576 people live within 50 km of this point.
Nearby, since 17 April 2026
- September 9, 2026 · score 28 · 0.0 km
- September 8, 2026 · score 37 · 20.7 km
- July 21, 2026 · score 37 · 21.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 92 % 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) | 28 / 100 |
| Our confidence | 92% |
| Coordinates | 41.4100, -92.9780 |
| Nearest City | Newton (33 km) |
| Population Exposed | 47.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-09T00:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d7d9478cfe744cec2f8195989ef129266eb68438.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jasper, IA; Lucas, IA; Mahaska, IA; Marion, IA; Monroe, IA; Poweshiek, IA |
| Headline | Severe Thunderstorm Warning issued September 8 at 7:22PM CDT until September 8 at 7:45PM CDT by NWS Des Moines IA |
| Expires | 2026-09-08T19:45:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 72 |
| Spc Location | 4 W Reasnor |
| Spc County | Jasper |
| Spc State | IA |
| Spc Comments | Time estimated from radar. (DMX) |
| Iem TypeSummary | G |
| Iem Magnitude | 72 |
| Iem Unit | MPH |
| Iem City | 4 W Reasnor |
| Iem County | Jasper |
| Iem State | IA |
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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