Right now
The most recent data we hold from NOAA arrived 9 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 13 May 2026 at 20:31 UTC. It is kept here as a record.
It is the 2nd strongest of the 17 detections recorded within 20 km of this point since 13 April 2026. 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 May 13 at 2:22PM MDT until May 13 at 2:30PM MDT by NWS Pocatello ID
Nearby, since 13 April 2026
- July 18, 2026 · score 34 · 24.4 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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 | 69% |
| Coordinates | 45.6425, -111.9371 |
| Nearest City | Butte (61 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-13T20:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f15e8ecca5592d75b8a135716709a3f7 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clark, ID; Fremont, ID; Jefferson, ID; Madison, ID; Beaverhead, MT; Madison, MT; Cascade, MT; Lewis and Clark, MT |
| Headline | Severe Thunderstorm Warning issued May 13 at 2:22PM MDT until May 13 at 2:30PM MDT by NWS Pocatello ID |
| Expires | 2026-05-13T14:31:00-06:00 |
| SenderName | NWS Pocatello ID |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f15e8ecca5592d75b8a135716709a3f7cca32935.001.1","noaa_urn:oid:2.49.0.1.840.0.ac23624f833cc79cc2fbe2219ba1be2eed2e2ba3.001.1","noaa_urn:oid:2.49.0.1.840.0.df1d26b08779cca61cab508ced75f50c783a83ec.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 54 |
| Iem Unit | MPH |
| Iem City | 3 SSE Butte |
| Iem County | Silver Bow |
| Iem State | MT |
| Iem Wfo | MSO |
| Iem Remark | ASOS station KBTM Butte-mooney Ap. |
| MergedSources | [{"id":"iem_N_45.500_-111.700_1778702400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702400000,"latitude":45.5,"longitude":-111.7},{"id":"iem_N_45.500_-111.700_1778698800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778698800000,"latitude":45.5,"longitude":-111.7},{"id":"iem_N_45.500_-111.700_1778699700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778699700000,"latitude":45.5,"longitude":-111.7},{"id":"iem_G_45.250_-112.550_1778702700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702700000,"latitude":45.25,"longitude":-112.55},{"id":"iem_G_45.970_-112.500_1778701980000","source":"iem","severity":"low","severityValue":25,"timestamp":1778701980000,"latitude":45.97,"longitude":-112.5}] |
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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