This alert expired on 12 July 2026 at 06:45 UTC. It is kept here as a record.
It is the 153rd strongest of the 245 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 11 July 2026. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 11 at 9:51AM CDT until July 12 at 1:40AM CDT by NWS La Crosse WI
An estimated 1,266,667 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 23, 2026 · score 52 · 3.2 km
- May 23, 2026 · score 52 · 7.3 km
- March 16, 2026 · score 58 · 9.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 82 % 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) | 52 / 100 |
| Our confidence | 82% |
| Coordinates | 38.9076, -90.1808 |
| Nearest City | Alton (2 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-13T00:00:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allamakee, IA; Floyd, IA; Black Hawk, IA and 21 more areas |
| Headline | Flood Warning issued July 11 at 9:51AM CDT until July 12 at 1:40AM CDT by NWS La Crosse WI |
| Expires | 2026-07-12T01:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 24 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0344181da4d15b9087056113842117dd0c9820d0.001.1","noaa_urn:oid:2.49.0.1.840.0.2a92ccc15ded93c2e3ae12692e00db6970c12adc.001.1","noaa_urn:oid:2.49.0.1.840.0.299e2fd807ef2b4d601857f1ea1e266cc0ee7155.001.1","noaa_urn:oid:2.49.0.1.840.0.4eb5a49cd1c49a93355bfa679148300c89321643.001.1","noaa_urn:oid:2.49.0.1.840.0.38fc60f949783f90c1fcc39650da77a7f903050f.003.1","noaa_urn:oid:2.49.0.1.840.0.38fc60f949783f90c1fcc39650da77a7f903050f.002.1","noaa_urn:oid:2.49.0.1.840.0.292020e16aa327180a259c40a9446e9c96aaef72.001.1","noaa_urn:oid:2.49.0.1.840.0.d374850856b98b6c325dfe35ba9a1a321e6f4107.001.1","noaa_urn:oid:2.49.0.1.840.0.d374850856b98b6c325dfe35ba9a1a321e6f4107.002.1","noaa_urn:oid:2.49.0.1.840.0.c206a711c4127888bf929f68297a5ed477796f5e.001.1","noaa_urn:oid:2.49.0.1.840.0.a54143f669946130e6bd9f81cb14df38e113d8d3.001.1","noaa_urn:oid:2.49.0.1.840.0.dc938653a249a172dd2e7a1bbb7173e3f8bae869.001.1","noaa_urn:oid:2.49.0.1.840.0.be8d2583c74741af4c3fb17690a232d7384256d2.001.1","noaa_urn:oid:2.49.0.1.840.0.e075029dec35e1dede205164423c8025584f3a72.001.1","noaa_urn:oid:2.49.0.1.840.0.fcd52687aba59de4413d19fbc25c4819543f2ec1.001.1","noaa_urn:oid:2.49.0.1.840.0.cc5a123f2c6eadee788ff7b2decc93e983bd59b6.001.1","noaa_urn:oid:2.49.0.1.840.0.43e297c94b983e6ac8be544aba445a471c4c573f.001.1","noaa_urn:oid:2.49.0.1.840.0.4c5f26e60d9751b71cfb5b471a1223fbb74efae3.001.1","noaa_urn:oid:2.49.0.1.840.0.44a9e66648932b54fa5653c95ad68fa55d67fb90.001.1","noaa_urn:oid:2.49.0.1.840.0.11a54e25f3e3241449f7f4e6a8d1ca8fc4a0d48f.001.1","noaa_urn:oid:2.49.0.1.840.0.bd6c07773902f991ff4f3ad8eb6cc7c35e7d9995.001.1","noaa_urn:oid:2.49.0.1.840.0.5911b8e09bfc2185e127f5f49c4c016708d86d46.001.1","noaa_urn:oid:2.49.0.1.840.0.2fe7e4068c4b64971acc60ddc33bdfc7edf6c1af.001.1","noaa_urn:oid:2.49.0.1.840.0.2a6388f477e501434da2b93bf9eebf2b7f3f28f3.001.1"] |
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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Alton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.