Right now
The most recent data we hold from NOAA arrived 19 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 23:03 UTC. It is kept here as a record.
It is the 7th strongest of the 37 detections recorded within 20 km of this point since 16 March 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 July 2 at 5:53PM 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
- May 18, 2026 · score 39 · 7.8 km
- June 17, 2026 · score 39 · 12.2 km
- September 4, 2026 · score 32 · 16.4 km
How we know
5 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 | 0.89/1 |
| Coordinates | 42.2688, -93.7011 |
| Nearest City | Ames (27 km) |
| Urban exposure index (PEI) | 89.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T22:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b4fa717140ba773ca8f0f95945136f5c |
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: 2026-07-02T22:53:00.000Z.
First archived: 2026-07-02T23:00:07.607Z. 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; Franklin, IA; Hardin, IA; Boone, IA; Polk, IA; Story, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 5:53PM CDT until July 2 at 6:00PM CDT by NWS Des Moines IA |
| Expires | 2026-07-02T18:03:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b4fa717140ba773ca8f0f95945136f5ceda79320.001.1","noaa_urn:oid:2.49.0.1.840.0.9f9b90f1a038c0eea63ef20b341954c4de7206a5.001.1","noaa_urn:oid:2.49.0.1.840.0.b2a95aed17e8d943a4e7bb3168c92f89bfaf7734.002.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Fort Dodge |
| 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_41.820_-93.780_1783031100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031100000,"latitude":41.82,"longitude":-93.78},{"id":"iem_H_42.280_-94.300_1783025760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783025760000,"latitude":42.28,"longitude":-94.3},{"id":"iem_H_42.510_-94.180_1783031640000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031640000,"latitude":42.51,"longitude":-94.18}] |
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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