Right now
The most recent data we hold from NOAA arrived 4 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 4 July 2026 at 07:00 UTC. It is kept here as a record.
It is the 67th strongest of the 551 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 3 July 2026. 41 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 3 at 8:51PM CDT until July 4 at 2:00AM CDT by NWS Quad Cities IA IL
Urban PEI: 450,012 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- August 13, 2026 · score 43 · 0.0 km
- August 12, 2026 · score 43 · 0.0 km
- August 9, 2026 · score 43 · 0.0 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 | 40.6000, -89.4000 |
| Nearest City | Morton (5 km) |
| Urban exposure index (PEI) | 450.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.57cdfe3ee52bccb4abd8f78a7c61b736 |
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: 2026-07-04T01:51:00.000Z.
First archived: 2026-07-04T01:52:47.275Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Cedar, IA; Clinton, IA; Jackson, IA; Johnson, IA; Louisa, IA; Muscatine, IA; Scott, IA; Washington, IA; Bureau, IL; Carroll, IL; Henry, IL; Jo Daviess, IL; Mercer, IL; Putnam, IL; Rock Island, IL; Stephenson, IL; Whiteside, IL; Boone, IL; Cook, IL; De Kalb, IL; DuPage, IL; Ford, IL; Grundy, IL; Iroquois, IL; Kane, IL; Kankakee, IL; Kendall, IL; Lake, IL; La Salle, IL; Lee, IL; Livingston, IL; McHenry, IL; Ogle, IL; Will, IL; Winnebago, IL; Benton, IN; Jasper, IN; Lake, IN; Newton, IN; Porter, IN; Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake and 1 more areas |
| Headline | Severe Thunderstorm Watch issued July 3 at 8:51PM CDT until July 4 at 2:00AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-07-04T02:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.57cdfe3ee52bccb4abd8f78a7c61b736f78e8a38.001.1","noaa_urn:oid:2.49.0.1.840.0.5db69d57f9c4bee8ef88c34d3a4e7d5f4f5153fd.001.1","noaa_urn:oid:2.49.0.1.840.0.5db69d57f9c4bee8ef88c34d3a4e7d5f4f5153fd.002.1","noaa_urn:oid:2.49.0.1.840.0.803d79a8c632e502d589948faa28edec6a249022.001.1"] |
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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