Right now
The most recent data we hold from NOAA arrived 2 hours 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 13:00 UTC. It is kept here as a record.
It is the 4th strongest of the 13 detections recorded within 20 km of this point since 13 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 7:40AM CDT until July 2 at 8:00AM CDT by NWS Sioux Falls SD
Nearby, since 13 April 2026
- September 7, 2026 · score 32 · 19.2 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 42.7140, -95.8600 |
| Nearest City | Sioux City (50 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-02T12:40:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.bead8edc126bacc056628c8eada292445dd0f68d.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: 2026-07-02T12:40:00.000Z.
First archived: 2026-07-02T12:46:45.739Z. 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 | Cherokee, IA; Plymouth, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 7:40AM CDT until July 2 at 8:00AM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-02T08:00:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 66 |
| Iem Unit | MPH |
| Iem City | Kingsley |
| Iem County | Plymouth |
| Iem State | IA |
| Iem Wfo | FSD |
| Iem Remark | Wind gust via Davis weather station. Emergency manager reported some 4-6 inch diameter tree branches down in Kingsley as well. |
| MergedSources | [{"id":"iem_G_42.590_-95.970_1782992400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782992400000,"latitude":42.59,"longitude":-95.97}] |
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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