Right now
The most recent data we hold from NOAA arrived 12 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 5 August 2026 at 18:15 UTC. It is kept here as a record.
It is the 6th strongest of the 26 detections recorded within 20 km of this point since 17 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 5 at 7:12AM CDT until August 5 at 1:15PM CDT by NWS Des Moines IA
Urban PEI: 15,467 within a heuristic 50 km radius; not unique people.
Nearby, since 17 April 2026
- August 5, 2026 · score 34 · 0.0 km
How we know
13 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 28 / 100 |
| Legacy data-support index | 0.92/1 |
| Coordinates | 40.9300, -93.6189 |
| Nearest City | Indianola (48 km) |
| Urban exposure index (PEI) | 15.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-05T12:12:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2dd1aced17b94e99f317dbe9cbf5410f5d8dd95c.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-08-05T12:12:00.000Z.
First archived: 2026-08-05T15:01:52.789Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Clarke, IA; Decatur, IA; Lucas, IA; Wayne, IA |
| Headline | Flash Flood Warning issued August 5 at 7:12AM CDT until August 5 at 1:15PM CDT by NWS Des Moines IA |
| Expires | 2026-08-05T13:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Unionville |
| Iem County | Putnam |
| Iem State | MO |
| Iem Wfo | EAX |
| Iem Remark | Reports of trees downed/uprooted and power poles downed across Unionville. |
| MergedSources | [{"id":"iem_R_41.040_-93.980_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":41.04,"longitude":-93.98},{"id":"iem_G_40.470_-93.000_1785931500000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931500000,"latitude":40.47,"longitude":-93},{"id":"iem_R_41.030_-93.780_1785934800000","source":"iem","severity":"low","severityValue":25,"timestamp":1785934800000,"latitude":41.03,"longitude":-93.78},{"id":"iem_G_40.470_-93.000_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":40.47,"longitude":-93},{"id":"iem_R_40.680_-93.150_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":40.68,"longitude":-93.15},{"id":"iem_R_41.020_-93.750_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":41.02,"longitude":-93.75},{"id":"iem_R_41.050_-93.950_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":41.05,"longitude":-93.95},{"id":"iem_R_41.120_-94.000_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":41.12,"longitude":-94},{"id":"iem_R_41.020_-93.820_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":41.02,"longitude":-93.82},{"id":"iem_R_40.900_-93.770_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":40.9,"longitude":-93.77},{"id":"iem_R_40.860_-93.500_1785939180000","source":"iem","severity":"low","severityValue":25,"timestamp":1785939180000,"latitude":40.86,"longitude":-93.5},{"id":"iem_D_40.480_-93.000_1785931200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785931200000,"latitude":40.48,"longitude":-93}] |
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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