Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
5 other detections within 20 km in the last 24 hours, the nearest 8 km from here.
This alert expired on 16 May 2026 at 00:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 26 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 15 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 7:01PM CDT until May 15 at 7:15PM CDT by NWS Omaha/Valley NE
Nearby, since 15 April 2026
- September 6, 2026 · score 16 · 7.7 km
- May 15, 2026 · score 22 · 13.4 km
- August 13, 2026 · score 22 · 14.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 65 % 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 | 65% |
| Coordinates | 41.9297, -95.4640 |
| Nearest City | Council Bluffs (81 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.d60b97d1936087c52a9be962780b157a |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Montgomery, IA; Page, IA; Pocahontas, IA; Sac, IA and 9 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 7:01PM CDT until May 15 at 7:15PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-15T19:15:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d60b97d1936087c52a9be962780b157accbef06a.001.1","noaa_urn:oid:2.49.0.1.840.0.7aa3c5c3f429f922173e478154fb53091f257079.002.1","noaa_urn:oid:2.49.0.1.840.0.a2913f0d033fdb2d9122dae6681ba796e042f4d7.001.1","noaa_urn:oid:2.49.0.1.840.0.189efe79bef5e9ef6ad5e8e3de2201760f0230fa.001.1","noaa_urn:oid:2.49.0.1.840.0.675710abe176911bf86f3860698627c717a6e15c.001.1","noaa_urn:oid:2.49.0.1.840.0.d31e8942776522e5da02463cef3d29014b8b8213.001.1","noaa_urn:oid:2.49.0.1.840.0.be0aa737a9bd4a62a046fe954a1faac3ce2e508d.001.1","noaa_urn:oid:2.49.0.1.840.0.f434b315e4d59913ea8e7fcbc555b2b3ac45ae5c.001.1","noaa_urn:oid:2.49.0.1.840.0.1df97b77674e832338e3ade5be6419b904a1f388.001.1","noaa_urn:oid:2.49.0.1.840.0.27f628920ce6b968e47b7583428cd6a78ba8db4b.001.1","noaa_urn:oid:2.49.0.1.840.0.e7bc8eaf310513a4ab769cd65e0e198c62cfac8a.001.1","noaa_urn:oid:2.49.0.1.840.0.cf6d28b3a249082485fb66b00a9ff7cbfd7cebb6.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 6 NNW Hornick |
| Iem County | Woodbury |
| Iem State | IA |
| Iem Wfo | FSD |
| Iem Remark | Hail covered the ground, with stones as big as quarters. No wind and a decent amount of rain. |
| MergedSources | [{"id":"iem_H_42.310_-96.130_1778886000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778886000000,"latitude":42.31,"longitude":-96.13}] |
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.