Right now
The most recent data we hold from NOAA arrived 5 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 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 51 recorded within 20 km of this point since 15 March 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 18 at 7:41PM CDT until May 18 at 11:45PM CDT by NWS Topeka KS
Urban PEI: 56,308 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 9, 2026 · score 39 · 3.7 km
- June 6, 2026 · score 39 · 10.8 km
- July 10, 2026 · score 39 · 20.5 km
How we know
21 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 39.5374, -96.3019 |
| Nearest City | Manhattan (46 km) |
| Urban exposure index (PEI) | 56.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T00:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1c93542390f71460593f1437ba33b6a4 |
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: 2026-05-19T00:41:00.000Z.
First archived: 2026-05-19T01:10:53.061Z. 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 | Geary, KS; Riley, KS; Wabaunsee, KS; Geary, KS; Pottawatomie, KS; Riley, KS; Atchison, MO; Holt, MO; Nodaway, MO |
| Headline | Flash Flood Warning issued May 18 at 7:41PM CDT until May 18 at 11:45PM CDT by NWS Topeka KS |
| Expires | 2026-05-18T23:45:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1c93542390f71460593f1437ba33b6a4f7d00543.001.1","noaa_urn:oid:2.49.0.1.840.0.a189e9e51d920b953b93233661c46d5d0638d5e6.001.1","noaa_urn:oid:2.49.0.1.840.0.6f2361dde27749163c4e654c28431d0bc406556e.001.1"] |
| Iem TypeSummary | T |
| Iem City | 5 NNW Frankfort |
| Iem County | Marshall |
| Iem State | KS |
| Iem Wfo | TOP |
| Iem Remark | Storm chaser saw the tornado pass in front of them. They are seeing damage of grain bins in fields, power lines down and tree damage. |
| 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_G_39.400_-95.750_1779150360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779150360000,"latitude":39.4,"longitude":-95.75},{"id":"iem_T_39.600_-97.110_1779138180000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138180000,"latitude":39.6,"longitude":-97.11},{"id":"iem_T_39.240_-97.020_1779143400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779143400000,"latitude":39.24,"longitude":-97.02},{"id":"iem_T_39.640_-96.740_1779142500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142500000,"latitude":39.64,"longitude":-96.74},{"id":"iem_G_39.230_-96.570_1779146880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779146880000,"latitude":39.23,"longitude":-96.57},{"id":"iem_G_40.080_-96.710_1779135720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779135720000,"latitude":40.08,"longitude":-96.71},{"id":"iem_H_40.000_-96.350_1779138900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138900000,"latitude":40,"longitude":-96.35},{"id":"iem_G_39.270_-96.520_1779147660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779147660000,"latitude":39.27,"longitude":-96.52},{"id":"iem_H_39.470_-97.160_1779139680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779139680000,"latitude":39.47,"longitude":-97.16},{"id":"iem_T_39.770_-96.450_1779143880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779143880000,"latitude":39.77,"longitude":-96.45},{"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_T_39.610_-97.140_1779138240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138240000,"latitude":39.61,"longitude":-97.14},{"id":"iem_D_39.470_-95.810_1779149700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779149700000,"latitude":39.47,"longitude":-95.81},{"id":"iem_G_39.230_-96.340_1779148140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779148140000,"latitude":39.23,"longitude":-96.34},{"id":"iem_H_39.500_-97.130_1779139800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779139800000,"latitude":39.5,"longitude":-97.13},{"id":"iem_T_40.050_-96.240_1779140700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140700000,"latitude":40.05,"longitude":-96.24},{"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}] |
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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