Right now
The most recent data we hold from SPC arrived 18 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by SPC today.
No stronger detection stands among the 51 recorded within 20 km of this point since 15 March 2026 — 28 others scored the same. The last comparable one was on 14 September 2026. 2 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Hail 275 in near 2 SW South Heart, Stark, ND. Social media report of baseball size hail southwest of South Heart. (BIS)
Urban PEI: 23,765 within a heuristic 50 km radius; not unique people.
How we know
2 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 v5. 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 | 0.75/1 |
| Coordinates | 46.8400, -103.0200 |
| Nearest City | Dickinson (18 km) |
| Urban exposure index (PEI) | 23.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-24T04:18:58.724Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Physical priority index · v5. 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: 2026-09-24T04:18:58.724Z.
First archived: 2026-09-24T01:58:46.414Z. Material modification: 2026-09-24T04:23:28.785Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-24T04:23:28.785Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T04:18:04.542Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T04:12:43.741Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T04:01:57.991Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:56:35.460Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:51:15.159Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:45:52.535Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:40:31.030Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:35:09.026Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:29:45.975Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:18:59.731Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:13:35.826Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:08:17.895Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T03:02:57.372Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:57:36.815Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:46:56.046Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:41:36.129Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:36:18.469Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:30:58.328Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
2026-09-24T02:25:37.762Z · data_change
Index 40 → 40; severity high → high; version 5 → 5.
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 275 |
| Location | 2 SW South Heart |
| County | Stark |
| State | ND |
| Comments | Social media report of baseball size hail southwest of South Heart. (BIS) |
| Iem TypeSummary | H |
| Iem Magnitude | 2.75 |
| Iem Unit | Inch |
| Iem City | 2 SW South Heart |
| Iem County | Stark |
| Iem State | ND |
| Iem Wfo | BIS |
| Iem Remark | Social media report of baseball size hail southwest of South Heart. |
| MergedSources | [{"id":"iem_H_46.840_-103.020_1790207100000","source":"iem","severity":"low","severityValue":25,"timestamp":1790207100000,"latitude":46.84,"longitude":-103.02}] |
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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