Right now
The most recent data we hold from NOAA arrived 6 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 7 August 2026 at 18:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 14 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 12:54PM CDT until August 7 at 1:15PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 17,674 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- August 7, 2026 · score 32 · 9.7 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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) | 28 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 43.5250, -93.6040 |
| Nearest City | Albert Lea (23 km) |
| Urban exposure index (PEI) | 17.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T17:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9cdff1e9cd2e81ccb7b335a2a5f363d8 |
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: 2026-08-07T17:54:00.000Z.
First archived: 2026-08-07T18:04:20.189Z. 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 | Freeborn, MN; Winnebago, IA; Worth, IA |
| Headline | Severe Thunderstorm Warning issued August 7 at 12:54PM CDT until August 7 at 1:15PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-08-07T13:15:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9cdff1e9cd2e81ccb7b335a2a5f363d8d954f988.002.1","noaa_urn:oid:2.49.0.1.840.0.b8f4c55cf08bf32413113a8db65a1927cc5bb0df.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 1 S Blue Earth |
| Iem County | Faribault |
| Iem State | MN |
| Iem Wfo | MPX |
| Iem Remark | Trained spotter reported quarter size hail in Blue Earth, MN. |
| MergedSources | [{"id":"iem_H_43.590_-93.800_1786122480000","source":"iem","severity":"low","severityValue":25,"timestamp":1786122480000,"latitude":43.59,"longitude":-93.8},{"id":"iem_H_43.630_-94.100_1786120920000","source":"iem","severity":"low","severityValue":25,"timestamp":1786120920000,"latitude":43.63,"longitude":-94.1}] |
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.
Review the area, threshold and delivery channel in your account.
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