Right now
The most recent data we hold from NOAA arrived 32 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 4 September 2026 at 01:15 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 4 April 2026. The last comparable one was on 29 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 7:58PM CDT until September 3 at 8:15PM CDT by NWS Grand Forks ND
Nearby, since 4 April 2026
- May 26, 2026 · 13.8 km
- July 6, 2026 · 17.9 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.72/1 |
| Coordinates | 47.0691, -96.1305 |
| Nearest City | Moorhead (53 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-04T00:58:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a262f0b9ea38b568f4a74ba2203d3c89367ad798.002.1 |
Physical priority index · v4 (historical). 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: 2026-09-04T00:58:00.000Z.
First archived: 2026-09-04T01:03:25.000Z. 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 | Marshall, MN; Pennington, MN; Red Lake, MN; Otter Tail, MN |
| Headline | Severe Thunderstorm Warning issued September 3 at 7:58PM CDT until September 3 at 8:15PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-03T20:15:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a262f0b9ea38b568f4a74ba2203d3c89367ad798.002.1","noaa_urn:oid:2.49.0.1.840.0.05494d3f192adc0102fc66e87342c6b67969c13a.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 230 |
| Spc Location | 6 S Naytahwaush |
| Spc County | Mahnomen |
| Spc State | MN |
| Spc Comments | Broadcast media shared photo of hail stone estimated to be 2 to 2.5 inches in diameter near Tulaby Lake MN. Time estimated from radar. (FGF) |
| Iem TypeSummary | D |
| Iem City | 3 SE Mcintosh |
| Iem County | Polk |
| Iem State | MN |
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.
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