This alert expired on 11 July 2026 at 11:15 UTC. It is kept here as a record.
No stronger detection stands among the 56 recorded within 20 km of this point since 16 March 2026 — 31 others scored the same. Another comparable one was recorded here earlier the same day. 21 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Watch issued July 10 at 10:13AM CDT until July 12 at 1:00PM CDT by NWS Des Moines IA
An estimated 109,715 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 13, 2026 · score 43 · 0.0 km
- July 12, 2026 · score 43 · 6.9 km
- July 26, 2026 · score 43 · 7.9 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, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 82% |
| Coordinates | 42.4994, -92.3633 |
| Nearest City | Waterloo (2 km) |
| Population Exposed | 109.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-12T12:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Watch_noaa_urn:oid:2.49.0.1.840.0.5b8e5d896245f5e36d04ec4bfc390484 |
Score Breakdown
Technical Details
| Event | Flood Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Black Hawk |
| Headline | Flood Watch issued July 10 at 10:13AM CDT until July 12 at 1:00PM CDT by NWS Des Moines IA |
| Expires | 2026-07-11T06:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5b8e5d896245f5e36d04ec4bfc390484fc0ca7ff.003.1","noaa_urn:oid:2.49.0.1.840.0.5b8e5d896245f5e36d04ec4bfc390484fc0ca7ff.002.1"] |
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 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.
Want to know when something happens near Waterloo?
Calamity.live data shows a weather event with CalamityScore 43/100, near Waterloo (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.