This alert expired on 3 July 2026 at 04:15 UTC. It is kept here as a record.
It is the 6th strongest of the 42 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 19 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 10:26PM CDT until July 2 at 11:15PM CDT by NWS Des Moines IA
An estimated 540,179 people live within 50 km of this point.
Nearby, since 15 April 2026
- July 20, 2026 · score 41 · 7.6 km
- August 13, 2026 · score 43 · 10.2 km
- July 4, 2026 · score 43 · 11.1 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 41.8020, -93.2560 |
| Nearest City | Newton (21 km) |
| Population Exposed | 540.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T03:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2d1424a7c88d6811b211df8a4cd68bc79d48ca72.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jasper, IA; Marshall, IA; Polk, IA; Story, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 10:26PM CDT until July 2 at 11:15PM CDT by NWS Des Moines IA |
| Expires | 2026-07-02T23:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 3 NE Windsor Heights |
| Iem County | Polk |
| Iem State | IA |
| Iem Wfo | DMX |
| MergedSources | [{"id":"iem_H_41.820_-93.780_1783031100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031100000,"latitude":41.82,"longitude":-93.78},{"id":"iem_H_41.610_-93.690_1783027560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783027560000,"latitude":41.61,"longitude":-93.69},{"id":"iem_H_41.630_-93.700_1783028100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783028100000,"latitude":41.63,"longitude":-93.7},{"id":"iem_H_41.640_-93.700_1783028220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783028220000,"latitude":41.64,"longitude":-93.7},{"id":"iem_D_41.590_-93.690_1783028280000","source":"iem","severity":"low","severityValue":25,"timestamp":1783028280000,"latitude":41.59,"longitude":-93.69},{"id":"iem_H_41.640_-93.660_1783028400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783028400000,"latitude":41.64,"longitude":-93.66}] |
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 near Newton?
Calamity.live data shows a weather event with CalamityScore 48/100, near Newton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.