Right now
The most recent data we hold from NOAA arrived 1 minute 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 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 5 recorded within 20 km of this point since 12 April 2026 — one other scored the same. The last comparable one was on 12 April 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 3:15PM MDT until May 13 at 3:45PM MDT by NWS Pocatello ID
Urban PEI: 361,623 within a heuristic 50 km radius; not unique people.
Nearby, since 12 April 2026
- May 13, 2026 · score 43 · 12.9 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 41.3973, -112.2770 |
| Nearest City | Brigham City (25 km) |
| Urban exposure index (PEI) | 361.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T21:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4492894b0954e5e16352cc176c8357e9 |
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: 2026-05-13T21:15:00.000Z.
First archived: 2026-05-13T21:18:29.625Z. 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 | Bannock, ID; Bingham, ID; Blaine, ID; Bonneville, ID; Butte, ID; Caribou, ID; Cassia, ID; Jefferson, ID; Minidoka, ID; Oneida, ID; Power, ID; Box Elder, UT; Cache, UT; Davis, UT; Morgan, UT; Tooele, UT; Weber, UT; Cassia, ID; Oneida, ID and 3 more areas |
| Headline | Severe Thunderstorm Warning issued May 13 at 3:15PM MDT until May 13 at 3:45PM MDT by NWS Pocatello ID |
| Expires | 2026-05-13T15:45:00-06:00 |
| SenderName | NWS Pocatello ID |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4492894b0954e5e16352cc176c8357e96fa31e24.001.1","noaa_urn:oid:2.49.0.1.840.0.7ecb4027ebb6c26cac9ded7b7e960bba0c8ac935.001.1","noaa_urn:oid:2.49.0.1.840.0.5256e5173911f1e764e2e3b64dc75f3a9394a8ae.001.1","noaa_urn:oid:2.49.0.1.840.0.166c50798517375f01fdebd46ec9556d4d31c7d7.001.1","noaa_urn:oid:2.49.0.1.840.0.a7686c3538365a279d49ed20327d6d8bce9550b1.001.1","noaa_urn:oid:2.49.0.1.840.0.473e7e93b75114d50a1703ba33edfc1e174e5516.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | 4 NE Stoddard |
| Iem County | Morgan |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Mesonet station PC298 The Head. |
| MergedSources | [{"id":"iem_G_41.110_-111.640_1778702400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702400000,"latitude":41.11,"longitude":-111.64}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Brigham City?