Right now
The most recent data we hold from NOAA arrived 19 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 00:15 UTC. It is kept here as a record.
It is the 5th strongest of the 26 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 6:29PM CDT until July 2 at 7:15PM 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 · 10.0 km
- June 4, 2026 · score 34 · 25.7 km
How we know
11 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 44.4143, -97.1748 |
| Nearest City | Brookings (32 km) |
| Urban exposure index (PEI) | 23.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T23:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3aefdd7085159d74740850787aecb0c8 |
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: 2026-07-02T23:29:00.000Z.
First archived: 2026-07-02T23:32:02.787Z. 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 | Codington, SD; Deuel, SD; Grant, SD; Davison, SD; Hanson, SD; Hutchinson, SD; McCook, SD; Clark, SD; Codington, SD; Deuel, SD; Hamlin, SD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 2 at 6:29PM CDT until July 2 at 7:15PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-02T19:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3aefdd7085159d74740850787aecb0c86bdf72d9.001.1","noaa_urn:oid:2.49.0.1.840.0.8c2494030d9769dbfa7cc9d5729de30209c81f4f.001.1","noaa_urn:oid:2.49.0.1.840.0.c82f0ba6646c72b487b0190f4946aafee38de47e.001.1","noaa_urn:oid:2.49.0.1.840.0.04f50b6d5d6ab11b66f57537e235420abea6b7b8.001.1","noaa_urn:oid:2.49.0.1.840.0.eaa87499f05e2e15c76924feef8a8b1a31dddf98.001.1"] |
| 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_G_44.330_-97.930_1783030260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783030260000,"latitude":44.33,"longitude":-97.93},{"id":"iem_G_44.320_-97.460_1783033260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783033260000,"latitude":44.32,"longitude":-97.46},{"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_44.570_-98.010_1783032000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032000000,"latitude":44.57,"longitude":-98.01},{"id":"iem_G_44.430_-97.560_1783033200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783033200000,"latitude":44.43,"longitude":-97.56},{"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_44.330_-97.930_1783031340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031340000,"latitude":44.33,"longitude":-97.93},{"id":"iem_G_44.440_-97.790_1783031460000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031460000,"latitude":44.44,"longitude":-97.79},{"id":"iem_G_44.500_-97.530_1783032360000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032360000,"latitude":44.5,"longitude":-97.53}] |
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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