Right now
The most recent data we hold from NOAA arrived 7 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.
It is the 5th strongest of the 35 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 5:18PM CDT until July 2 at 6:00PM CDT by NWS Des Moines IA
Urban PEI: 89,709 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 17, 2026 · score 39 · 5.9 km
- May 18, 2026 · score 39 · 7.3 km
- September 4, 2026 · score 32 · 16.8 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 42.2804, -93.8033 |
| Nearest City | Ames (32 km) |
| Urban exposure index (PEI) | 89.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T22:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c98390bd3e0e1d11eb1a9f83f26ccef1 |
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: 2026-07-02T22:18:00.000Z.
First archived: 2026-07-02T22:33:19.268Z. 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 | Webster, IA; Boone, IA; Dallas, IA; Polk, IA; Story, IA; Franklin, IA; Hamilton, IA; Hardin, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 5:18PM 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 | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c98390bd3e0e1d11eb1a9f83f26ccef19ad067ba.002.1","noaa_urn:oid:2.49.0.1.840.0.c8773fb25b785ac9f8646ed08996da55a376223d.001.1","noaa_urn:oid:2.49.0.1.840.0.d93b03f594edba580986c9cfff3c5c2bc2b7b8dc.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 1 WNW Gowrie |
| Iem County | Webster |
| Iem State | IA |
| Iem Wfo | DMX |
| MergedSources | [{"id":"iem_H_42.280_-94.290_1783026060000","source":"iem","severity":"low","severityValue":25,"timestamp":1783026060000,"latitude":42.28,"longitude":-94.29},{"id":"iem_H_42.280_-94.300_1783025760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783025760000,"latitude":42.28,"longitude":-94.3}] |
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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