This alert expired on 22 June 2026 at 01:00 UTC. It is kept here as a record.
It is the 10th strongest of the 114 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 47 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 21 at 6:20PM CDT until June 21 at 8:00PM CDT by NWS Lincoln IL
An estimated 21,196 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 28, 2026 · score 22 · 4.5 km
- June 27, 2026 · score 22 · 4.5 km
- May 11, 2026 · score 34 · 5.7 km
How we know
Confirmed by 13 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 90% |
| Coordinates | 39.0637, -88.1420 |
| Nearest City | Charleston (49 km) |
| Population Exposed | 21.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T23:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1d186f8b600bc221b05b4f513bff6486 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Clark, IL; Clay, IL; Cumberland, IL; Jasper, IL; Richland, IL; Clay, IL; Lawrence, IL; Richland, IL; Marion, IL and 8 more areas |
| Headline | Flash Flood Warning issued June 21 at 6:20PM CDT until June 21 at 8:00PM CDT by NWS Lincoln IL |
| Expires | 2026-06-21T20:00:00-05:00 |
| SenderName | NWS Lincoln IL |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1d186f8b600bc221b05b4f513bff6486efbcb2df.001.1","noaa_urn:oid:2.49.0.1.840.0.c362c63dd9e8fc86001b3626e463d2396b8ec37e.001.1","noaa_urn:oid:2.49.0.1.840.0.2ca329f7b9eb7d96552d7928e08b6f7d2e79564f.001.1","noaa_urn:oid:2.49.0.1.840.0.a7beffb38410a0303db59ae809b9eff39092b048.001.1","noaa_urn:oid:2.49.0.1.840.0.d54746353709470cfb6d33bebd12a65bb408fa00.001.1","noaa_urn:oid:2.49.0.1.840.0.9c0b38832253ded4bc9e586ff1f58a51731fd4be.001.1","noaa_urn:oid:2.49.0.1.840.0.4a1427c6f87cd48cadc300ba5d542fca5fdfed63.001.1","noaa_urn:oid:2.49.0.1.840.0.c58b840f8ec36868e894f488074c83881fe90af3.001.1","noaa_urn:oid:2.49.0.1.840.0.ec77b9cf968a125a06ef13759dad4f84d0355096.001.1","noaa_urn:oid:2.49.0.1.840.0.ea976325db249d0420bfb1494359389efdccf7f8.001.1","noaa_urn:oid:2.49.0.1.840.0.3cbbecd4778ffb401243c6e959bdd8a705cb488d.001.1"] |
| Iem TypeSummary | T |
| Iem City | 1 SSE Newton |
| Iem County | Jasper |
| Iem State | IL |
| Iem Wfo | ILX |
| Iem Remark | Large TDS on radar. |
| MergedSources | [{"id":"iem_T_39.130_-87.770_1782078300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782078300000,"latitude":39.13,"longitude":-87.77},{"id":"iem_C_39.240_-88.700_1782073140000","source":"iem","severity":"low","severityValue":25,"timestamp":1782073140000,"latitude":39.24,"longitude":-88.7},{"id":"iem_E_39.380_-88.350_1782079260000","source":"iem","severity":"low","severityValue":25,"timestamp":1782079260000,"latitude":39.38,"longitude":-88.35},{"id":"iem_C_38.720_-88.510_1782079380000","source":"iem","severity":"low","severityValue":25,"timestamp":1782079380000,"latitude":38.72,"longitude":-88.51},{"id":"iem_T_38.840_-88.380_1782074820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782074820000,"latitude":38.84,"longitude":-88.38},{"id":"iem_D_39.330_-88.430_1782075960000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075960000,"latitude":39.33,"longitude":-88.43},{"id":"iem_T_38.730_-88.870_1782077880000","source":"iem","severity":"low","severityValue":25,"timestamp":1782077880000,"latitude":38.73,"longitude":-88.87},{"id":"iem_T_38.770_-88.500_1782074040000","source":"iem","severity":"low","severityValue":25,"timestamp":1782074040000,"latitude":38.77,"longitude":-88.5},{"id":"iem_C_38.680_-88.630_1782073200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782073200000,"latitude":38.68,"longitude":-88.63},{"id":"iem_D_39.320_-88.430_1782074580000","source":"iem","severity":"low","severityValue":25,"timestamp":1782074580000,"latitude":39.32,"longitude":-88.43},{"id":"iem_T_38.780_-88.670_1782078060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782078060000,"latitude":38.78,"longitude":-88.67},{"id":"iem_T_38.980_-88.150_1782076440000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076440000,"latitude":38.98,"longitude":-88.15}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.