This alert expired on 30 June 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 3 April 2026 — 2 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: Severe Thunderstorm Warning issued June 29 at 11:21PM CDT until June 29 at 11:45PM CDT by NWS Grand Forks ND
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 70 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 28 / 100 |
| Our confidence | 70% |
| Coordinates | 47.6992, -95.7292 |
| Nearest City | Grand Forks (100 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-30T04:21:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9e3cba6c09eab520050b26b8f46fc7f8 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Beltrami, MN; Lake of the Woods, MN; Cass, MN; Crow Wing, MN; Kittson, MN; Marshall, MN; Walsh, ND and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 29 at 11:21PM CDT until June 29 at 11:45PM CDT by NWS Grand Forks ND |
| Expires | 2026-06-29T23:45:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9e3cba6c09eab520050b26b8f46fc7f83ddfd091.001.1","noaa_urn:oid:2.49.0.1.840.0.54a9d666103fc9f447ae01f7990955fc035bb4b1.001.1","noaa_urn:oid:2.49.0.1.840.0.da21a315b3c83d281b78adced730c845a3399746.002.1","noaa_urn:oid:2.49.0.1.840.0.3ca73faed7d594bd4d16171e7794d3428bdd3b6d.001.1","noaa_urn:oid:2.49.0.1.840.0.06f8568986cea6c3bdc396f9b1cd6fc3ae1136c7.002.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 1 ENE Wilton |
| Spc County | Beltrami |
| Spc State | MN |
| Spc Comments | (FGF) |
| MergedSources | [{"id":"spc_tornado_47.13_-96.18_3","source":"spc","severity":"high","severityValue":78,"timestamp":1782785820000,"latitude":47.13,"longitude":-96.18},{"id":"spc_wind_47.14_-95.21_21","source":"spc","severity":"medium","severityValue":45,"timestamp":1782793298817,"latitude":47.14,"longitude":-95.21},{"id":"spc_hail_47.51_-94.97_142","source":"spc","severity":"high","severityValue":65,"timestamp":1782788700000,"latitude":47.51,"longitude":-94.97}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.