This alert expired on 16 May 2026 at 23:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 46 detections recorded within 20 km of this point since 16 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 16 at 5:43PM CDT until May 16 at 6:15PM CDT by NWS Kansas City/Pleasant Hill MO
Nearby, since 16 May 2026
- May 16, 2026 · score 46 · 9.0 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 40.6442, -94.3893 |
| Nearest City | Saint Joseph (105 km) |
| Impact Tier | minor |
| Date | 2026-05-16 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.307424b0c4f5864844500bb428e30831 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grundy, MO; Linn, MO; Sullivan, MO; Montgomery, IA; Taylor, IA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued May 16 at 5:43PM CDT until May 16 at 6:15PM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-05-16T18:15:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.307424b0c4f5864844500bb428e308311181dcab.001.1","noaa_urn:oid:2.49.0.1.840.0.6b6c649525e76fe106b3ac86f407c9dcebe10e3e.001.1","noaa_urn:oid:2.49.0.1.840.0.51ee6a280050f608beed7386b7099492baa768a9.001.1","noaa_urn:oid:2.49.0.1.840.0.b2ce48409355e27ca082079d0492d7dac7be2c8e.001.1","noaa_urn:oid:2.49.0.1.840.0.69f053b9e370280a311d59fb63edb59bd0a43545.001.1","noaa_urn:oid:2.49.0.1.840.0.cbfca6e4e387f209ae6f45605c86141fa05772ca.001.1","noaa_urn:oid:2.49.0.1.840.0.b76b5b893df3a6778ab379bc6c8fd8f88179eeaf.001.1","noaa_urn:oid:2.49.0.1.840.0.988ff8a96e86af4749e019dc623358490bae946f.001.1","noaa_urn:oid:2.49.0.1.840.0.a915e9349a9142b559811b38a38ee7fb1c22f75f.001.1","noaa_urn:oid:2.49.0.1.840.0.71bd3f464d411dc3730a865c58ee630a46e7c9c7.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Stanton |
| Iem County | Montgomery |
| Iem State | IA |
| Iem Wfo | OAX |
| Iem Remark | Member of the public reported hail up to the size of quarters. |
| MergedSources | [{"id":"iem_H_40.940_-95.100_1778967180000","source":"iem","severity":"low","severityValue":25,"timestamp":1778967180000,"latitude":40.94,"longitude":-95.1},{"id":"iem_H_40.800_-94.890_1778969400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778969400000,"latitude":40.8,"longitude":-94.89},{"id":"iem_H_40.980_-95.100_1778968260000","source":"iem","severity":"low","severityValue":25,"timestamp":1778968260000,"latitude":40.98,"longitude":-95.1}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.