This alert expired on 6 July 2026 at 03:00 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 17 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 8:07PM MDT until July 5 at 9:00PM MDT by NWS Great Falls MT
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 71% |
| Coordinates | 47.3943, -108.9010 |
| Nearest City | Great Falls (181 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-06T02:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.fd1de56d193a0eb21810c292d96d16ea |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Blaine, MT; Fergus, MT; Garfield, MT; Petroleum, MT; Phillips, MT; Fergus, MT |
| Headline | Severe Thunderstorm Warning issued July 5 at 8:07PM MDT until July 5 at 9:00PM MDT by NWS Great Falls MT |
| Expires | 2026-07-05T21:00:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fd1de56d193a0eb21810c292d96d16ea1433efd9.001.1","noaa_urn:oid:2.49.0.1.840.0.a6ef375068ff8fc7ef0bfdda91bc25fd2cff8ee9.001.1","noaa_urn:oid:2.49.0.1.840.0.9e879249c13222271298aa1b37fa40992ff1b951.001.1","noaa_urn:oid:2.49.0.1.840.0.9f92b81377907eea51973bc7b1c8b2d2f415ab5c.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 7 ENE Denton |
| Iem County | Fergus |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | AWOS station K1DM Delta. |
| MergedSources | [{"id":"iem_G_47.300_-109.850_1783301400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783301400000,"latitude":47.3,"longitude":-109.85},{"id":"iem_G_47.370_-109.820_1783301340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783301340000,"latitude":47.37,"longitude":-109.82}] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.