Right now
The most recent data we hold from NOAA arrived 33 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 11 June 2026 at 13:45 UTC. It is kept here as a record.
It is the 8th strongest of the 19 detections recorded within 20 km of this point since 17 April 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 8:05AM CDT until June 11 at 8:45AM CDT by NWS Des Moines IA
Urban PEI: 15,467 within a heuristic 50 km radius; not unique people.
Nearby, since 17 April 2026
- July 4, 2026 · score 43 · 11.8 km
- June 6, 2026 · score 67 · 20.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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 v1. 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 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 41.2107, -93.2299 |
| Nearest City | Indianola (32 km) |
| Urban exposure index (PEI) | 15.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T13:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.16a5eb1fbc92456325c295cca1c17ebf |
Physical priority index · v1. 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: 2026-06-11T13:05:00.000Z.
First archived: 2026-06-11T13:10:44.576Z. 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 | Appanoose, IA; Davis, IA; Decatur, IA; Lucas, IA; Monroe, IA; Ringgold, IA; Wapello, IA; Wayne, IA; Lucas, IA; Mahaska, IA; Marion, IA; Monroe, IA; Wapello, IA; Warren, IA; Grundy, IA; Jasper, IA; Marshall, IA; Story, IA; Tama, IA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 8:05AM CDT until June 11 at 8:45AM CDT by NWS Des Moines IA |
| Expires | 2026-06-11T08:45:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.16a5eb1fbc92456325c295cca1c17ebf5db84718.001.1","noaa_urn:oid:2.49.0.1.840.0.70173e087c77d39f794974f5167de8fc5b5537fb.001.1","noaa_urn:oid:2.49.0.1.840.0.ad39e34642894445be2d44867dd2412b53c15b94.001.1","noaa_urn:oid:2.49.0.1.840.0.58d4331788423a6a453b137ba7729ea2eaa7f35c.001.1","noaa_urn:oid:2.49.0.1.840.0.f630876f8f65d23e3723d1ee9834e468af5f276d.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.
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