Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is in it.
26 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert is in force until 10 September 2026, 08:15 UTC.
It is the 41st strongest of the 128 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Flood Warning issued September 9 at 3:09PM CDT until September 10 at 3:15PM CDT by NWS Des Moines IA
An estimated 466,831 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 9, 2026 · score 41 · 4.3 km
- September 9, 2026 · score 54 · 6.2 km
- July 21, 2026 · score 48 · 8.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 85 % 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) | 37 / 100 |
| Our confidence | 85% |
| Coordinates | 41.5700, -93.6340 |
| Nearest City | Des Moines (4 km) |
| Population Exposed | 466.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-09T20:09:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.012dfcf2fbbef2fa5407bedc4df5de31de455c16.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Polk, IA |
| Headline | Flood Warning issued September 9 at 3:09PM CDT until September 10 at 3:15PM CDT by NWS Des Moines IA |
| Expires | 2026-09-10T03:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 4.5 |
| Iem Unit | Inch |
| Iem City | Runnells |
| Iem County | Polk |
| Iem State | IA |
| Iem Wfo | DMX |
| Iem Remark | 24 Hour storm total. |
| MergedSources | [{"id":"iem_R_41.590_-93.650_1788974400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788974400000,"latitude":41.59,"longitude":-93.65},{"id":"iem_R_41.760_-93.640_1788969180000","source":"iem","severity":"low","severityValue":25,"timestamp":1788969180000,"latitude":41.76,"longitude":-93.64},{"id":"iem_R_41.510_-94.520_1788974760000","source":"iem","severity":"low","severityValue":25,"timestamp":1788974760000,"latitude":41.51,"longitude":-94.52},{"id":"iem_R_41.590_-93.760_1788966420000","source":"iem","severity":"low","severityValue":25,"timestamp":1788966420000,"latitude":41.59,"longitude":-93.76},{"id":"iem_R_41.640_-93.460_1788963180000","source":"iem","severity":"low","severityValue":25,"timestamp":1788963180000,"latitude":41.64,"longitude":-93.46},{"id":"iem_R_41.510_-93.360_1788973200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788973200000,"latitude":41.51,"longitude":-93.36}] |
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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