Right now
The most recent data we hold from NOAA arrived 4 hours 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 2 July 2026 at 19:15 UTC. It is kept here as a record.
It is the 5th strongest of the 34 detections recorded within 20 km of this point since 16 March 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 July 2 at 1:08PM CDT until July 2 at 2:15PM CDT by NWS La Crosse WI
Nearby, since 16 March 2026
- August 7, 2026 · score 34 · 19.0 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.71/1 |
| Coordinates | 43.0779, -92.5020 |
| Nearest City | Mason City (57 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-02T18:08:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.096fbf8e57d48ae5b2c172a2355a1979 |
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: 2026-07-02T18:08:00.000Z.
First archived: 2026-07-02T18:15:41.109Z. 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 | Chickasaw, IA; Fayette, IA; Howard, IA; Winneshiek, IA; Floyd, IA |
| Headline | Severe Thunderstorm Warning issued July 2 at 1:08PM CDT until July 2 at 2:15PM CDT by NWS La Crosse WI |
| Expires | 2026-07-02T14:15:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.096fbf8e57d48ae5b2c172a2355a1979ef8af614.001.1","noaa_urn:oid:2.49.0.1.840.0.3617ef9b92b46e2f9f557a74458cf80562a82923.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 72 |
| Iem Unit | MPH |
| Iem City | 6 SE Mason City |
| Iem County | Cerro Gordo |
| Iem State | IA |
| Iem Wfo | DMX |
| Iem Remark | PWS gust with a sustained 58mph. |
| MergedSources | [{"id":"iem_G_43.140_-93.200_1783012500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783012500000,"latitude":43.14,"longitude":-93.2},{"id":"iem_G_43.090_-93.120_1783013100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783013100000,"latitude":43.09,"longitude":-93.12}] |
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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