Right now
The most recent data we hold from SPC arrived 7 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Reported by SPC 85 days ago.
What the source measured
SPC reported: Hail 100 in near Groton, Brown, SD. (ABR)
Urban PEI: 28,102 within a heuristic 50 km radius; not unique people.
How we know
4 recorded sources include SPC; independence is not established by this count.
Our own score for this event is 40 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 | High |
| Calamity Score (ours) | 40 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 45.4500, -98.1000 |
| Nearest City | Aberdeen (30 km) |
| Urban exposure index (PEI) | 28.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-29T13:04:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
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: spc. Occurrence: 2026-06-29T13:04:00.000Z.
First archived: 2026-06-29T18:47:10.023Z. 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
| ReportType | hail |
| Speed | 100 |
| Location | Groton |
| County | Brown |
| State | SD |
| Comments | (ABR) |
| Iem TypeSummary | N |
| Iem Magnitude | 68 |
| Iem Unit | MPH |
| Iem City | 2 SW Westport |
| Iem County | Brown |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | Wake low winds. |
| MergedSources | [{"id":"iem_N_45.650_-98.500_1782739980000","source":"iem","severity":"low","severityValue":25,"timestamp":1782739980000,"latitude":45.65,"longitude":-98.5},{"id":"iem_H_45.450_-98.100_1782738240000","source":"iem","severity":"low","severityValue":25,"timestamp":1782738240000,"latitude":45.45,"longitude":-98.1},{"id":"iem_N_45.630_-98.520_1782739500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782739500000,"latitude":45.63,"longitude":-98.52}] |
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.
Want to know when something happens near Aberdeen?