Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
15 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert is in force until 21 September 2026, 23:00 UTC.
It is the 8th strongest of the 38 detections recorded within 20 km of this point since 20 May 2026. The last comparable one was on 19 September 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued September 21 at 1:02PM EDT until September 21 at 7:00PM EDT by NWS Charleston WV
Urban PEI: 1,174,395 within a heuristic 50 km radius; not unique people.
Nearby, since 20 May 2026
- September 21, 2026 · score 46 · 5.5 km
- August 11, 2026 · score 52 · 5.6 km
- July 11, 2026 · score 52 · 13.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 46 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 39.6883, -82.7324 |
| Nearest City | Lancaster (12 km) |
| Urban exposure index (PEI) | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T18:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b90d2004df54fc75c3f3aaf9a39d37800d8c3ddf.001.1 |
Physical priority index · v5. 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: 2026-09-21T18:00:00.000Z.
First archived: 2026-09-21T17:04:05.022Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-21T17:20:33.846Z · data_change
Index 46 → 46; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Ritchie, WV; Wirt, WV; Athens, OH; Morgan, OH; Perry, OH; Washington, OH; Meigs, OH; Jackson, WV; Wirt, WV; Wood, WV and 16 more areas |
| Headline | Flood Warning issued September 21 at 1:02PM EDT until September 21 at 7:00PM EDT by NWS Charleston WV |
| Expires | 2026-09-21T19:00:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 20 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b90d2004df54fc75c3f3aaf9a39d37800d8c3ddf.001.1","noaa_urn:oid:2.49.0.1.840.0.c03ba969ce233cf9d10b05bac8ec8f9f51085707.001.1","noaa_urn:oid:2.49.0.1.840.0.1fcc91a8826a46ca63083c97933f6aff7b7cb58f.001.1","noaa_urn:oid:2.49.0.1.840.0.ac712e3ba34c881765428a821844a8640d473d3f.001.1","noaa_urn:oid:2.49.0.1.840.0.e73e06a875e165f7a2bde8f2826fe418d3e4bd15.001.1","noaa_urn:oid:2.49.0.1.840.0.8db31438de262207e78123c4c93ec9260291516a.001.1","noaa_urn:oid:2.49.0.1.840.0.fa2df36696678d4220d8c89d7ded7d016554688e.001.1","noaa_urn:oid:2.49.0.1.840.0.ca5dfecb6b0627d1d657817067f6c9f6b46704c6.001.1","noaa_urn:oid:2.49.0.1.840.0.4c3a9987810e17be162283353fd012d9a7453292.001.1","noaa_urn:oid:2.49.0.1.840.0.cbf27d072358565431ed6464ad1613efcffaa7cb.001.1","noaa_urn:oid:2.49.0.1.840.0.7b5bdbd8e79280cc3c2f9a260864f4c37de6e4bc.001.1","noaa_urn:oid:2.49.0.1.840.0.30a0fa727e55ce1a893ccbd9e1bffd3b04f63ac7.001.1","noaa_urn:oid:2.49.0.1.840.0.98dd4a259cd31c075f985143f8f356067c3bcf73.001.1","noaa_urn:oid:2.49.0.1.840.0.8d0539945fe9abe228680416a402135fd0d480e9.001.1","noaa_urn:oid:2.49.0.1.840.0.ee7fd310d45b2ef01c97bd63dd2efaad7e37e222.001.1","noaa_urn:oid:2.49.0.1.840.0.a10f5befc832559a3051c92f03441eab6fdeb73d.001.1","noaa_urn:oid:2.49.0.1.840.0.7c64f918c4cf7a4484cbab0c8258d7d147aa4115.002.1","noaa_urn:oid:2.49.0.1.840.0.7c64f918c4cf7a4484cbab0c8258d7d147aa4115.001.1","noaa_urn:oid:2.49.0.1.840.0.7c64f918c4cf7a4484cbab0c8258d7d147aa4115.004.1","noaa_urn:oid:2.49.0.1.840.0.7c64f918c4cf7a4484cbab0c8258d7d147aa4115.003.1"] |
| Iem TypeSummary | E |
| Iem City | 10 W Mcarthur |
| Iem County | Vinton |
| Iem State | OH |
| Iem Wfo | RLX |
| Iem Remark | Flooding observed at the intersection of Beechgrove Road and US Highway 50. |
| MergedSources | [{"id":"iem_E_39.270_-82.660_1789996320000","source":"iem","severity":"low","severityValue":25,"timestamp":1789996320000,"latitude":39.27,"longitude":-82.66}] |
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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