Right now
The most recent data we hold from NOAA arrived 13 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 19 May 2026 at 07:15 UTC. It is kept here as a record.
No stronger detection stands among the 32 recorded within 20 km of this point since 10 April 2026 — 8 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 18 at 8:09PM CDT until May 19 at 2:15AM CDT by NWS Kansas City/Pleasant Hill MO
Nearby, since 10 April 2026
- July 31, 2026 · score 16 · 6.3 km
- July 31, 2026 · score 22 · 14.7 km
How we know
20 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 39.7811, -95.9169 |
| Nearest City | Topeka (84 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-19T01:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.a59750588ded0951bbe231d74479cbe5 |
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: 2026-05-19T01:09:00.000Z.
First archived: 2026-05-19T01:26:18.223Z. 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 | Nodaway, MO; Worth, MO; Atchison, MO; Holt, MO; Nodaway, MO; Geary, KS; Riley, KS; Wabaunsee, KS and 1 more areas |
| Headline | Flash Flood Warning issued May 18 at 8:09PM CDT until May 19 at 2:15AM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-05-19T02:15:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a59750588ded0951bbe231d74479cbe53caf6332.001.1","noaa_urn:oid:2.49.0.1.840.0.6f2361dde27749163c4e654c28431d0bc406556e.001.1","noaa_urn:oid:2.49.0.1.840.0.1c93542390f71460593f1437ba33b6a4f7d00543.001.1","noaa_urn:oid:2.49.0.1.840.0.a189e9e51d920b953b93233661c46d5d0638d5e6.001.1"] |
| Iem TypeSummary | D |
| Iem City | 4 E Tecumseh |
| Iem County | Johnson |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Downed trees, damage to grain bins, and damaged farm outbuildings. Possible tornado damage. Time estimated from radar. |
| MergedSources | [{"id":"iem_H_40.210_-96.350_1779138660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138660000,"latitude":40.21,"longitude":-96.35},{"id":"iem_T_39.640_-96.740_1779142500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142500000,"latitude":39.64,"longitude":-96.74},{"id":"iem_F_40.370_-96.200_1779139800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779139800000,"latitude":40.37,"longitude":-96.2},{"id":"iem_H_40.000_-96.350_1779138900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138900000,"latitude":40,"longitude":-96.35},{"id":"iem_G_40.410_-95.860_1779140040000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140040000,"latitude":40.41,"longitude":-95.86},{"id":"iem_T_39.770_-96.450_1779143880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779143880000,"latitude":39.77,"longitude":-96.45},{"id":"iem_G_40.350_-96.050_1779138720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138720000,"latitude":40.35,"longitude":-96.05},{"id":"iem_T_39.690_-96.640_1779143220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779143220000,"latitude":39.69,"longitude":-96.64},{"id":"iem_T_39.470_-95.830_1779149700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779149700000,"latitude":39.47,"longitude":-95.83},{"id":"iem_D_39.470_-95.810_1779149700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779149700000,"latitude":39.47,"longitude":-95.81},{"id":"iem_D_40.390_-95.840_1779139620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779139620000,"latitude":40.39,"longitude":-95.84},{"id":"iem_D_40.370_-96.190_1779138060000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138060000,"latitude":40.37,"longitude":-96.19},{"id":"iem_T_40.050_-96.240_1779140700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140700000,"latitude":40.05,"longitude":-96.24},{"id":"iem_G_40.220_-96.350_1779137220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779137220000,"latitude":40.22,"longitude":-96.35},{"id":"iem_T_40.070_-95.820_1779141600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141600000,"latitude":40.07,"longitude":-95.82},{"id":"iem_T_39.770_-96.460_1779144780000","source":"iem","severity":"low","severityValue":25,"timestamp":1779144780000,"latitude":39.77,"longitude":-96.46},{"id":"iem_H_40.190_-96.010_1779142080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142080000,"latitude":40.19,"longitude":-96.01},{"id":"iem_T_40.170_-95.620_1779142500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142500000,"latitude":40.17,"longitude":-95.62},{"id":"iem_D_40.360_-96.100_1779138480000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138480000,"latitude":40.36,"longitude":-96.1}] |
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.
Review the area, threshold and delivery channel in your account.
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