Right now
The most recent data we hold from NOAA arrived 19 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 25 June 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 56 recorded within 20 km of this point since 3 April 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 7:23PM CDT until June 24 at 7:45PM CDT by NWS Lincoln IL
Urban PEI: 1,552,731 within a heuristic 50 km radius; not unique people.
Nearby, since 3 April 2026
- June 25, 2026 · score 52 · 0.1 km
- June 24, 2026 · score 52 · 6.5 km
- September 2, 2026 · score 46 · 8.5 km
How we know
10 recorded sources include NOAA; independence is not established by this count.
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 | 0.88/1 |
| Coordinates | 42.0866, -88.6142 |
| Nearest City | Sycamore (12 km) |
| Urban exposure index (PEI) | 1.6M within 50 km |
| Impact Tier | significant |
| Date | 2026-06-25 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0666f0ee833e652cc3af049edfe3d579 |
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: 2026-06-25 — time not reported.
First archived: 2026-06-25T00:24:09.174Z. 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 | Tazewell, IL; Woodford, IL; Grundy, IL; Kendall, IL; La Salle, IL and 5 more areas |
| Headline | Severe Thunderstorm Warning issued June 24 at 7:23PM CDT until June 24 at 7:45PM CDT by NWS Lincoln IL |
| Expires | 2026-06-24T19:45:00-05:00 |
| SenderName | NWS Lincoln IL |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0666f0ee833e652cc3af049edfe3d579c6689d8f.001.1","noaa_urn:oid:2.49.0.1.840.0.90ade92050dc04f4c74fecb3d8a055c5e14079b0.001.1","noaa_urn:oid:2.49.0.1.840.0.1623a999378d573f71c2924453f229aacba04d32.002.1","noaa_urn:oid:2.49.0.1.840.0.6097a3633787025b26ddcabf1adc79c87222a9e6.001.1","noaa_urn:oid:2.49.0.1.840.0.dbea807a02216c6b81a78ea2a2deb2306905df85.001.1","noaa_urn:oid:2.49.0.1.840.0.519214d23829ce94de897ff02ded56ba7f7d7495.001.1","noaa_urn:oid:2.49.0.1.840.0.3604873dfa2b2ac3cfd6082987fb131c72c01e57.001.1","noaa_urn:oid:2.49.0.1.840.0.97c0e682a2df80b7332df81931779bef3352de99.002.1","noaa_urn:oid:2.49.0.1.840.0.4021f2ea82f77d6903d90ba24323798a5c44843a.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 2 E Huntley |
| Iem County | McHenry |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Public report of 1.5 inch hail near Huntly. Relayed via mping. |
| MergedSources | [{"id":"iem_H_42.160_-88.300_1782341640000","source":"iem","severity":"low","severityValue":25,"timestamp":1782341640000,"latitude":42.16,"longitude":-88.3},{"id":"iem_H_42.150_-89.230_1782340920000","source":"iem","severity":"low","severityValue":25,"timestamp":1782340920000,"latitude":42.15,"longitude":-89.23},{"id":"iem_D_42.000_-88.190_1782344160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344160000,"latitude":42,"longitude":-88.19},{"id":"iem_D_42.000_-88.150_1782344280000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344280000,"latitude":42,"longitude":-88.15},{"id":"iem_G_42.110_-88.280_1782342840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782342840000,"latitude":42.11,"longitude":-88.28},{"id":"iem_H_42.160_-88.340_1782341820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782341820000,"latitude":42.16,"longitude":-88.34},{"id":"iem_H_42.150_-88.270_1782341940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782341940000,"latitude":42.15,"longitude":-88.27},{"id":"iem_E_42.040_-88.290_1782344880000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344880000,"latitude":42.04,"longitude":-88.29},{"id":"iem_H_42.180_-88.390_1782340860000","source":"iem","severity":"low","severityValue":25,"timestamp":1782340860000,"latitude":42.18,"longitude":-88.39}] |
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 Sycamore?