Right now
The most recent data we hold from NOAA arrived 15 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 3 July 2026 at 03:30 UTC. It is kept here as a record.
It is the 6th strongest of the 113 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 2 July 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 10:00PM CDT until July 2 at 10:30PM CDT by NWS Des Moines IA
Urban PEI: 531,549 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- August 13, 2026 · score 48 · 6.0 km
- July 3, 2026 · score 41 · 8.4 km
- September 8, 2026 · score 48 · 8.9 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 41.8260, -93.5540 |
| Nearest City | Ankeny (12 km) |
| Urban exposure index (PEI) | 531.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T03:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.81d03b3316b7dd145bd5063ab856b7be2d150c8e.001.1 |
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: 2026-07-03T03:00:00.000Z.
First archived: 2026-07-03T03:24:08.593Z. 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 | Polk, IA; Story, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 10:00PM CDT until July 2 at 10:30PM CDT by NWS Des Moines IA |
| Expires | 2026-07-02T22:30:00-05:00 |
| 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.
Review the area, threshold and delivery channel in your account.
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