Right now
The most recent data we hold from NOAA arrived 20 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 01:30 UTC. It is kept here as a record.
No stronger detection stands among the 40 recorded within 20 km of this point since 15 March 2026 — 8 others scored the same. The last comparable one was on 1 July 2026. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 8:13PM CDT until July 2 at 8:30PM CDT by NWS Sioux Falls SD
Urban PEI: 171,544 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 3, 2026 · score 43 · 0.0 km
- July 1, 2026 · score 43 · 4.0 km
- June 18, 2026 · score 43 · 14.4 km
How we know
5 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 | 0.88/1 |
| Coordinates | 43.6838, -96.5275 |
| Nearest City | Sioux Falls (23 km) |
| Urban exposure index (PEI) | 171.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T01:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.72ef776b2eed10fb1c7b316dfa192acbdcbc64bb.002.1 |
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: 2026-07-03T01:13:00.000Z.
First archived: 2026-07-03T01:17:12.288Z. 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 | Lyon, IA; Lincoln, SD; Minnehaha, SD; Moody, SD |
| Headline | Severe Thunderstorm Warning issued July 2 at 8:13PM CDT until July 2 at 8:30PM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-02T20:30:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 65 |
| Iem Unit | MPH |
| Iem City | 5 ENE Orland |
| Iem County | Lake |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | Mesonet station MDMS2 Madison 6S (SD Mesonet). |
| MergedSources | [{"id":"iem_G_43.940_-96.970_1783035600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783035600000,"latitude":43.94,"longitude":-96.97},{"id":"iem_G_43.560_-97.160_1783038600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783038600000,"latitude":43.56,"longitude":-97.16},{"id":"iem_H_44.170_-96.380_1783038060000","source":"iem","severity":"low","severityValue":25,"timestamp":1783038060000,"latitude":44.17,"longitude":-96.38},{"id":"iem_G_43.910_-97.090_1783035780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783035780000,"latitude":43.91,"longitude":-97.09}] |
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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