Right now
The most recent data we hold from NOAA arrived 87 minutes ago, and this point is in it.
23 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert is in force until 9 September 2026, 22:00 UTC.
It is the 32nd strongest of the 126 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 9 September 2026. 23 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued September 9 at 4:59AM CDT until September 12 at 7:00AM CDT by NWS Des Moines IA
An estimated 531,891 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 9, 2026 · score 44 · 0.7 km
- September 9, 2026 · score 48 · 3.1 km
- September 8, 2026 · score 48 · 8.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 41 / 100 |
| Our confidence | 82% |
| Coordinates | 41.5880, -93.7051 |
| Nearest City | West Des Moines (1 km) |
| Population Exposed | 531.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-10T07:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.09f71dacf79d19effa23c403865abb1b3c358158.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Polk, IA; Dallas, IA; Polk, IA |
| Headline | Flood Warning issued September 9 at 4:59AM CDT until September 12 at 7:00AM CDT by NWS Des Moines IA |
| Expires | 2026-09-09T17:00:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.09f71dacf79d19effa23c403865abb1b3c358158.001.1","noaa_urn:oid:2.49.0.1.840.0.aa59472c2e16560a619cbfa218fbdf2a2add8368.001.1","noaa_urn:oid:2.49.0.1.840.0.c4b96362fa1fbc31019199a7411eb29cfe51311b.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 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.
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