Calamity
mediumSevere weatherCalamity Score: 52

Severe weather near Sycamore

DeKalbUnited StatesNOAA

This alert expired on 25 June 2026 at 01:30 UTC. It is kept here as a record.

No stronger detection stands among the 54 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. 9 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Severe Thunderstorm Warning issued June 24 at 7:27PM CDT until June 24 at 8:30PM CDT by NWS Chicago IL

An estimated 1,552,731 people live within 50 km of this point.

Nearby, since 3 April 2026

How we know

Confirmed by 15 independent sources, including NOAA.

Our own score for this event is 52 out of 100, at 88 % confidence.

The score is ours, computed from intensity, exposed population and local history — not the source’s.

Event Data

TypeSevere weather
Severitymedium
Calamity Score (ours)52 / 100
Our confidence88%
Coordinates42.0861, -88.6131
Nearest CitySycamore (12 km)
Population Exposed1.6M within 50 km
Impact Tiersignificant
Timestamp2026-06-25T00:27:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.17b73f2c72d63844ea122f6f0b5d8120

Score Breakdown

35
intensity
100
population
0
cascading
80
historical

Technical Details

EventSevere Thunderstorm Warning
UrgencyImmediate
CertaintyObserved
AreaDescCook, IL; Tazewell, IL; Woodford, IL; Grundy, IL; Kendall, IL and 5 more areas
HeadlineSevere Thunderstorm Warning issued June 24 at 7:27PM CDT until June 24 at 8:30PM CDT by NWS Chicago IL
Expires2026-06-24T20:30:00-05:00
SenderNameNWS Chicago IL
HasExactCoordstrue
MergedCount9
MergedIds["noaa_urn:oid:2.49.0.1.840.0.17b73f2c72d63844ea122f6f0b5d81200d85ed1c.001.1","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:2.49.0.1.840.0.6097a3633787025b26ddcabf1adc79c87222a9e6.001.1","noaa_urn:oid:2.49.0.1.840.0.1623a999378d573f71c2924453f229aacba04d32.002.1","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:2.49.0.1.840.0.97c0e682a2df80b7332df81931779bef3352de99.002.1","noaa_urn:oid:2.49.0.1.840.0.4021f2ea82f77d6903d90ba24323798a5c44843a.001.1"]
Iem TypeSummaryG
Iem Magnitude58
Iem UnitMPH
Iem City1 S Hanover Park
Iem CountyDuPage
Iem StateIL
Iem WfoLOT
Iem RemarkPrivate weather station KILHANOVI2 measured a wind gust to 58 mph.
MergedSources[{"id":"iem_E_42.000_-88.140_1782345000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782345000000,"latitude":42,"longitude":-88.14},{"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_41.980_-88.140_1782344400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344400000,"latitude":41.98,"longitude":-88.14},{"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_41.970_-88.850_1782343560000","source":"iem","severity":"low","severityValue":25,"timestamp":1782343560000,"latitude":41.97,"longitude":-88.85},{"id":"iem_D_42.100_-88.280_1782342780000","source":"iem","severity":"low","severityValue":25,"timestamp":1782342780000,"latitude":42.1,"longitude":-88.28},{"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},{"id":"iem_G_41.980_-88.150_1782344340000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344340000,"latitude":41.98,"longitude":-88.15}]

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 10 February 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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Calamity.live data shows a weather event with CalamityScore 52/100, near Sycamore (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.