Right now
The most recent data we hold from NOAA arrived 35 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 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 20 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. 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: Tornado Warning issued July 2 at 6:16PM CDT until July 2 at 7:00PM CDT by NWS Aberdeen SD
Urban PEI: 23,657 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 2, 2026 · score 58 · 4.8 km
How we know
5 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 58 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) | 58 / 100 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 44.3214, -97.1793 |
| Nearest City | Brookings (30 km) |
| Urban exposure index (PEI) | 23.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T23:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.d60e6a42f9e018e753ca428440fb591f |
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: 2026-07-02T23:16:00.000Z.
First archived: 2026-07-02T23:26:36.485Z. 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 | Hamlin, SD; Lake, SD |
| Headline | Tornado Warning issued July 2 at 6:16PM CDT until July 2 at 7:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-02T19:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d60e6a42f9e018e753ca428440fb591fbf740f8a.001.1","noaa_urn:oid:2.49.0.1.840.0.bea331a7246fd6b1e3eb3c785569998d0c9c5df6.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 72 |
| Iem Unit | MPH |
| Iem City | 4 W Erwin |
| Iem County | Kingsbury |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | Mesonet station DTMS2 De Smet 7N (SD Mesonet). |
| MergedSources | [{"id":"iem_T_44.590_-97.720_1783031400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031400000,"latitude":44.59,"longitude":-97.72},{"id":"iem_G_44.500_-97.530_1783032780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032780000,"latitude":44.5,"longitude":-97.53},{"id":"iem_G_44.630_-97.490_1783034520000","source":"iem","severity":"low","severityValue":25,"timestamp":1783034520000,"latitude":44.63,"longitude":-97.49},{"id":"iem_G_44.500_-97.530_1783032360000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032360000,"latitude":44.5,"longitude":-97.53}] |
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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