Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, 15 km from here.
This alert expired on 13 May 2026 at 22:32 UTC. It is kept here as a record.
No stronger detection stands among the 32 recorded within 20 km of this point since 2 April 2026 — 11 others scored the same. The last comparable one was on 11 April 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 4:22PM MDT until May 13 at 4:30PM MDT by NWS Salt Lake City UT
An estimated 50,371 people live within 50 km of this point.
Nearby, since 2 April 2026
- June 27, 2026 · score 39 · 20.3 km
- August 28, 2026 · score 39 · 26.0 km
How we know
Confirmed by 9 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 90 % 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) | 39 / 100 |
| Our confidence | 90% |
| Coordinates | 42.0552, -111.4775 |
| Nearest City | Logan (46 km) |
| Population Exposed | 50.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T22:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3b7eba5ae12a2ded0fb0569a9ea367f1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Juab, UT; Sanpete, UT; Utah, UT; Box Elder, UT; Cache, UT; Davis, UT; Morgan, UT; Rich, UT; Weber, UT; Bear Lake, ID; Caribou, ID; Franklin, ID and 3 more areas |
| Headline | Severe Thunderstorm Warning issued May 13 at 4:22PM MDT until May 13 at 4:30PM MDT by NWS Salt Lake City UT |
| Expires | 2026-05-13T16:32:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3b7eba5ae12a2ded0fb0569a9ea367f15dd0bad2.001.1","noaa_urn:oid:2.49.0.1.840.0.724a7b8725a48b3cb2c100428cff760b9a4c72cd.001.1","noaa_urn:oid:2.49.0.1.840.0.53e8f40917fa1539d27cd4b5dd22dfc5112fc263.001.1","noaa_urn:oid:2.49.0.1.840.0.d0ea7060ca6e5f66fdd1b9270d06e57d21e739f3.001.1","noaa_urn:oid:2.49.0.1.840.0.822062566dc78c28247eafe3c36a9c9c62d60f0f.001.1","noaa_urn:oid:2.49.0.1.840.0.4c3d1ddf224be8adc906b96f12964f9c25f1fb1d.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 3 ENE Collinston |
| Iem County | Box Elder |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Mesonet station UT30 SR-30. |
| MergedSources | [{"id":"iem_G_41.580_-112.070_1778707800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778707800000,"latitude":41.58,"longitude":-112.07},{"id":"iem_G_41.710_-111.720_1778709600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709600000,"latitude":41.71,"longitude":-111.72},{"id":"iem_G_41.690_-112.160_1778707800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778707800000,"latitude":41.69,"longitude":-112.16},{"id":"iem_G_41.780_-111.850_1778709240000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709240000,"latitude":41.78,"longitude":-111.85},{"id":"iem_G_42.060_-111.800_1778710200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778710200000,"latitude":42.06,"longitude":-111.8},{"id":"iem_G_41.610_-111.950_1778708400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778708400000,"latitude":41.61,"longitude":-111.95},{"id":"iem_G_41.870_-111.810_1778709600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709600000,"latitude":41.87,"longitude":-111.81},{"id":"iem_G_41.780_-112.020_1778709000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709000000,"latitude":41.78,"longitude":-112.02}] |
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 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.