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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 27 July 2026 at 17:00 UTC. It is kept here as a record.
No stronger detection stands among the 64 recorded within 20 km of this point since 16 March 2026 — 12 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 27 at 11:47AM CDT until July 27 at 12:00PM CDT by NWS Green Bay WI
Urban PEI: 1,250,737 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 27, 2026 · score 46 · 0.7 km
- April 14, 2026 · score 52 · 2.2 km
- August 18, 2026 · score 46 · 2.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 43.0336, -87.9593 |
| Nearest City | Milwaukee (4 km) |
| Urban exposure index (PEI) | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-27T16:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.69b871854a30ff9ea185c5fcc2f02b6c |
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: 2026-07-27T16:47:00.000Z.
First archived: 2026-07-27T16:55:04.985Z. 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 | Brown, WI; Kewaunee, WI; Brown, WI; Outagamie, WI; Kenosha, WI; Racine, WI and 7 more areas |
| Headline | Severe Thunderstorm Warning issued July 27 at 11:47AM CDT until July 27 at 12:00PM CDT by NWS Green Bay WI |
| Expires | 2026-07-27T12:00:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.69b871854a30ff9ea185c5fcc2f02b6cf7a213d7.002.1","noaa_urn:oid:2.49.0.1.840.0.4f376858a31871479e1971cd8394b9a1878c1aff.001.1","noaa_urn:oid:2.49.0.1.840.0.0091ee9bc8d6c4574e025248c3e8509f8e7a9194.002.1","noaa_urn:oid:2.49.0.1.840.0.6ccfac459db0d5ad6ac8c15aa3af0731a78cfe66.001.1","noaa_urn:oid:2.49.0.1.840.0.86a6b7650525d31a4647c9685d5a369214b9e21a.002.1","noaa_urn:oid:2.49.0.1.840.0.3284e32355b3d2912e598090756c631f7a9a9bd1.002.1","noaa_urn:oid:2.49.0.1.840.0.c0706e525e83c33fc473b91ae884739b9256f2e4.001.1","noaa_urn:oid:2.49.0.1.840.0.702f590205cf3bf3015323240de560a1a78d2720.001.1","noaa_urn:oid:2.49.0.1.840.0.d542f1e05bbdbfe7050b6cb2a62d81f22cd672d6.001.1","noaa_urn:oid:2.49.0.1.840.0.e1d4b796a444e9df0a08778f3b4cf80e76eaa250.001.1"] |
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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