Right now
The most recent data we hold from NOAA 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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 19 July 2026 at 00:33 UTC. It is kept here as a record.
No stronger detection stands among the 39 recorded within 20 km of this point since 20 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 6:23PM MDT until July 18 at 6:30PM MDT by NWS Great Falls MT
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.59/1 |
| Coordinates | 47.9867, -111.5891 |
| Nearest City | Great Falls (58 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-19T00:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5af06f20f5420c9925d571973f2144a9 |
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: noaa. Occurrence: 2026-07-19T00:23:00.000Z.
First archived: 2026-07-19T00:25:20.483Z. 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 | Teton, MT; Lewis and Clark, MT; Teton, MT; Hill, MT; Liberty, MT and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 18 at 6:23PM MDT until July 18 at 6:30PM MDT by NWS Great Falls MT |
| Expires | 2026-07-18T18:33:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5af06f20f5420c9925d571973f2144a997d05374.001.1","noaa_urn:oid:2.49.0.1.840.0.0cfb2fadc4ec0bbffc768029684c03dde6cdb4eb.001.1","noaa_urn:oid:2.49.0.1.840.0.884a1b913302ad6aa6021da6d8d8fafda36a039c.001.1","noaa_urn:oid:2.49.0.1.840.0.2c5cb1d8542cfd7f3802016d94b2ce26f2e1ffe8.001.1","noaa_urn:oid:2.49.0.1.840.0.65631867ab56fffa59c67c18ec7facf5dcb2f437.001.1","noaa_urn:oid:2.49.0.1.840.0.c41876915a5cdad806091b0a275887df3a8467f8.001.1","noaa_urn:oid:2.49.0.1.840.0.880393e82f8859fe7bfc4189f5790c2dc13517a9.001.1"] |
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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