Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
5 other detections within 20 km in the last 24 hours, the nearest 19 km from here.
This alert expired on 19 May 2026 at 08:15 UTC. It is kept here as a record.
It is the 9th strongest of the 44 detections recorded within 20 km of this point since 3 April 2026. Another comparable one was recorded here earlier the same day. 26 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 18 at 9:50PM CDT until May 19 at 3:15AM CDT by NWS Des Moines IA
Nearby, since 3 April 2026
- May 16, 2026 · score 46 · 15.1 km
- September 7, 2026 · score 28 · 19.3 km
How we know
Confirmed by 29 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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) | 22 / 100 |
| Our confidence | 70% |
| Coordinates | 40.6583, -94.5928 |
| Nearest City | Saint Joseph (101 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-19T02:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.7c6f7e0a2f1ba594f39497a0373e6f76 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Decatur, IA; Ringgold, IA; Taylor, IA; Nodaway, MO; Worth, MO |
| Headline | Flash Flood Warning issued May 18 at 9:50PM CDT until May 19 at 3:15AM CDT by NWS Des Moines IA |
| Expires | 2026-05-19T03:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7c6f7e0a2f1ba594f39497a0373e6f76df826658.001.1","noaa_urn:oid:2.49.0.1.840.0.a59750588ded0951bbe231d74479cbe53caf6332.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 65 |
| Iem Unit | MPH |
| Iem City | 4 SE Guilford |
| Iem County | Nodaway |
| Iem State | MO |
| Iem Wfo | EAX |
| Iem Remark | PWS measured 65 mph gust. |
| MergedSources | [{"id":"iem_H_40.620_-95.120_1779143760000","source":"iem","severity":"low","severityValue":25,"timestamp":1779143760000,"latitude":40.62,"longitude":-95.12},{"id":"iem_F_40.520_-94.580_1779156240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779156240000,"latitude":40.52,"longitude":-94.58},{"id":"iem_F_40.710_-94.240_1779158100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779158100000,"latitude":40.71,"longitude":-94.24},{"id":"iem_T_40.700_-94.360_1779148560000","source":"iem","severity":"low","severityValue":25,"timestamp":1779148560000,"latitude":40.7,"longitude":-94.36},{"id":"iem_F_40.780_-94.200_1779158100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779158100000,"latitude":40.78,"longitude":-94.2},{"id":"iem_H_40.740_-95.040_1779144660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779144660000,"latitude":40.74,"longitude":-95.04},{"id":"iem_G_40.270_-94.510_1779154980000","source":"iem","severity":"low","severityValue":25,"timestamp":1779154980000,"latitude":40.27,"longitude":-94.51},{"id":"iem_H_40.520_-94.590_1779148860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779148860000,"latitude":40.52,"longitude":-94.59},{"id":"iem_D_40.110_-94.820_1779153720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779153720000,"latitude":40.11,"longitude":-94.82},{"id":"iem_H_40.420_-94.980_1779146220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779146220000,"latitude":40.42,"longitude":-94.98},{"id":"iem_D_40.080_-94.640_1779154620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779154620000,"latitude":40.08,"longitude":-94.64},{"id":"iem_T_40.600_-94.630_1779147000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779147000000,"latitude":40.6,"longitude":-94.63},{"id":"iem_H_40.730_-95.030_1779145020000","source":"iem","severity":"low","severityValue":25,"timestamp":1779145020000,"latitude":40.73,"longitude":-95.03},{"id":"iem_F_40.710_-94.240_1779158160000","source":"iem","severity":"low","severityValue":25,"timestamp":1779158160000,"latitude":40.71,"longitude":-94.24},{"id":"iem_F_40.560_-95.030_1779153540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779153540000,"latitude":40.56,"longitude":-95.03},{"id":"iem_G_40.680_-95.010_1779144420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779144420000,"latitude":40.68,"longitude":-95.01},{"id":"iem_G_40.440_-95.380_1779141900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141900000,"latitude":40.44,"longitude":-95.38},{"id":"iem_H_40.350_-95.100_1779145080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779145080000,"latitude":40.35,"longitude":-95.1},{"id":"iem_T_40.600_-94.630_1779147600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779147600000,"latitude":40.6,"longitude":-94.63},{"id":"iem_F_40.540_-95.260_1779156900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779156900000,"latitude":40.54,"longitude":-95.26},{"id":"iem_F_40.350_-94.870_1779154380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779154380000,"latitude":40.35,"longitude":-94.87},{"id":"iem_H_40.490_-94.420_1779150540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779150540000,"latitude":40.49,"longitude":-94.42},{"id":"iem_T_40.780_-94.220_1779149340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779149340000,"latitude":40.78,"longitude":-94.22},{"id":"iem_D_40.040_-94.520_1779154620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779154620000,"latitude":40.04,"longitude":-94.52},{"id":"iem_R_40.770_-94.220_1779158100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779158100000,"latitude":40.77,"longitude":-94.22},{"id":"iem_H_40.520_-94.610_1779148800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779148800000,"latitude":40.52,"longitude":-94.61},{"id":"iem_H_40.390_-94.930_1779146280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779146280000,"latitude":40.39,"longitude":-94.93},{"id":"iem_G_40.140_-94.680_1779154380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779154380000,"latitude":40.14,"longitude":-94.68}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.