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 13 May 2026 at 23:00 UTC. It is kept here as a record.
It is one of only 2 we have recorded within 20 km of this point since 13 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 4:48PM MDT until May 13 at 5:00PM MDT by NWS Billings 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, at 60 % 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 | 60% |
| Coordinates | 44.4455, -110.2646 |
| Nearest City | Rexburg (140 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-13T22:48:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2126a26a635751e68509a54e60efe147 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Sweet Grass, MT; Golden Valley, MT; Wheatland, MT; Park, WY; Teton, WY and 7 more areas |
| Headline | Severe Thunderstorm Warning issued May 13 at 4:48PM MDT until May 13 at 5:00PM MDT by NWS Billings MT |
| Expires | 2026-05-13T17:00:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2126a26a635751e68509a54e60efe147e8fdaa36.002.1","noaa_urn:oid:2.49.0.1.840.0.e5de6a0a9819f0550a93a0a0838ffbbe2be13274.001.1","noaa_urn:oid:2.49.0.1.840.0.45296afb152363fe3edc57185df8ce5755713076.001.1","noaa_urn:oid:2.49.0.1.840.0.fa8ccf113c86988f55455c96478668aca7128cd5.002.1","noaa_urn:oid:2.49.0.1.840.0.76ba5e2983540a2209282d68a68a7269f74a095b.001.1","noaa_urn:oid:2.49.0.1.840.0.28de7eb649671d763ac527917a719a4ce14b8c02.001.1","noaa_urn:oid:2.49.0.1.840.0.234f49083a469d960bdc7ae53d8c19ad287deb49.002.1","noaa_urn:oid:2.49.0.1.840.0.627e8ac05bd6cac7da434532c8eaadc87391c2a5.002.1","noaa_urn:oid:2.49.0.1.840.0.9d0729c3b8e39f8a0a228c250568994af369622c.001.1","noaa_urn:oid:2.49.0.1.840.0.153e2654d4570f5c8c38ed9af0db6f0275536ffe.002.1"] |
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.
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.