Right now
The most recent data we hold from NOAA arrived 2 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 2 July 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 16 March 2026 — 35 others scored the same. 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 July 2 at 4:54PM CDT until July 2 at 6:00PM CDT by NWS Des Moines IA
Urban PEI: 109,715 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 10, 2026 · score 43 · 4.0 km
- July 26, 2026 · score 43 · 8.7 km
- July 8, 2026 · score 43 · 8.9 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 42.4460, -92.2288 |
| Nearest City | Waterloo (10 km) |
| Urban exposure index (PEI) | 109.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T21:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.de4d9d12d3f7290a28e2138bf2280765 |
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: 2026-07-02T21:54:00.000Z.
First archived: 2026-07-02T21:56:04.437Z. 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 | Jasper, IA; Marshall, IA; Polk, IA; Story, IA; Buchanan, IA; Delaware, IA; Iowa, WI and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 2 at 4:54PM CDT until July 2 at 6:00PM CDT by NWS Des Moines IA |
| Expires | 2026-07-02T18:00:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.de4d9d12d3f7290a28e2138bf22807657b992f4d.001.1","noaa_urn:oid:2.49.0.1.840.0.ae2376b7b99165b7878ca7a5165a67b45247c8e7.001.1","noaa_urn:oid:2.49.0.1.840.0.46d7f04e3d06d21d7dc23c9aea3ce3a8fcd644b7.001.1","noaa_urn:oid:2.49.0.1.840.0.e0f92a04efc6c7f56c0a55dfcb2b6a70f50772c1.001.1","noaa_urn:oid:2.49.0.1.840.0.bb7c80f9a4f1d06fe237850b427604726179107b.001.1","noaa_urn:oid:2.49.0.1.840.0.297eb7bc30211be58912f001089675c8bc50f16e.001.1","noaa_urn:oid:2.49.0.1.840.0.8f8a498d036e74025257f64f4f24c6946c07fbee.001.1","noaa_urn:oid:2.49.0.1.840.0.44d8ecd25f1c9fb9d2613bcc87cdbcd6b8963730.001.1","noaa_urn:oid:2.49.0.1.840.0.47c9b81cea9a252b9ac8f7fc176012cd18f3c4ea.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 2.75 |
| Iem Unit | Inch |
| Iem City | 4 E Maynard |
| Iem County | Fayette |
| Iem State | IA |
| Iem Wfo | ARX |
| MergedSources | [{"id":"iem_D_42.680_-91.930_1783018080000","source":"iem","severity":"low","severityValue":25,"timestamp":1783018080000,"latitude":42.68,"longitude":-91.93},{"id":"iem_H_42.760_-91.800_1783018860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783018860000,"latitude":42.76,"longitude":-91.8},{"id":"iem_H_42.770_-91.800_1783018860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783018860000,"latitude":42.77,"longitude":-91.8}] |
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.
Review the area, threshold and delivery channel in your account.
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