Right now
The most recent data we hold from NOAA arrived 13 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 23:05 UTC. It is kept here as a record.
No stronger detection stands among the 71 recorded within 20 km of this point since 15 March 2026 — 31 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 27 at 5:55PM CDT until July 27 at 6:00PM CDT by NWS Chicago IL
Urban PEI: 227,671 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- August 10, 2026 · score 43 · 6.7 km
- June 6, 2026 · score 43 · 8.0 km
- September 16, 2026 · score 37 · 10.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 40.2496, -86.6480 |
| Nearest City | Frankfort (12 km) |
| Urban exposure index (PEI) | 227.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-27T22:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1bf858b124a41226aae34bf1afaaa3ba |
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: 2026-07-27T22:55:00.000Z.
First archived: 2026-07-27T22:58:21.276Z. 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 | Cook, IL; Will, IL; Iroquois, IL; Benton, IN; Lake, IN and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 27 at 5:55PM CDT until July 27 at 6:00PM CDT by NWS Chicago IL |
| Expires | 2026-07-27T18:05:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1bf858b124a41226aae34bf1afaaa3ba1d78260a.001.1","noaa_urn:oid:2.49.0.1.840.0.98afa78e9a16b29e8011f4d1444ea990c6de4c20.001.1","noaa_urn:oid:2.49.0.1.840.0.6ecccf3545d15f60efb8ac3eebf31eb337945134.001.1","noaa_urn:oid:2.49.0.1.840.0.6866b8666cb9d2a1e7b3be214b6f537fa16a930e.001.1","noaa_urn:oid:2.49.0.1.840.0.ad94432306135fe3a9e31ce431b1e6d0716d5b43.001.1","noaa_urn:oid:2.49.0.1.840.0.ee5e2e3bfb8baf6b46aa0c6cf9f0ee54f0088c6d.001.1","noaa_urn:oid:2.49.0.1.840.0.3e9bfded51359fe15472fc2d4ff0de2f0c5d1088.002.1","noaa_urn:oid:2.49.0.1.840.0.fbe0a23be3ac6acd1f33e543b7e308244d40a19d.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.
Want to know when something happens near Frankfort?