Right now
The most recent data we hold from NOAA arrived 53 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.
No stronger detection stands among the 22 recorded within 20 km of this point since 4 June 2026 — 4 others scored the same. 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: Tornado Warning issued July 2 at 5:37PM CDT until July 2 at 6:00PM CDT by NWS Sioux Falls SD
Nearby, since 4 June 2026
- August 29, 2026 · score 34 · 18.9 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 46 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 44.5650, -97.7100 |
| Nearest City | Watertown (60 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-02T22:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.431b07ee619e3a2ccf44b431fda47cb6 |
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: 2026-07-02T22:37:00.000Z.
First archived: 2026-07-02T22:49:08.827Z. 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 | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Beadle, SD; Kingsbury, SD; Clark, SD; Hamlin, SD |
| Headline | Tornado Warning issued July 2 at 5:37PM CDT until July 2 at 6:00PM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-02T18:00:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.431b07ee619e3a2ccf44b431fda47cb6a5fad5c5.001.1","noaa_urn:oid:2.49.0.1.840.0.9a5080743d1b280e979d228ccf85dd58c971e245.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 90 |
| Iem Unit | MPH |
| Iem City | 2 NNW Huron |
| Iem County | Beadle |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | ASOS station KHON Huron Regional Airport. |
| MergedSources | [{"id":"iem_G_44.340_-98.220_1783029720000","source":"iem","severity":"low","severityValue":25,"timestamp":1783029720000,"latitude":44.34,"longitude":-98.22},{"id":"iem_C_44.320_-98.280_1783028700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783028700000,"latitude":44.32,"longitude":-98.28},{"id":"iem_G_44.390_-98.230_1783029360000","source":"iem","severity":"low","severityValue":25,"timestamp":1783029360000,"latitude":44.39,"longitude":-98.23}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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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