Right now
The most recent data we hold from NOAA arrived 1 hour 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 31 July 2026 at 04:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 39 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 30 at 5:35PM CDT until July 30 at 11:30PM CDT by NWS Aberdeen SD
Urban PEI: 28,102 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 45.2854, -98.4638 |
| Nearest City | Aberdeen (20 km) |
| Urban exposure index (PEI) | 28.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-30T22:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d3772ca2c57240f8bc32fd0349f8b8ea |
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: 2026-07-30T22:35:00.000Z.
First archived: 2026-07-30T23:13:11.506Z. 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 | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Faulk, SD; Day, SD |
| Headline | Flood Warning issued July 30 at 5:35PM CDT until July 30 at 11:30PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-30T23:30:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d3772ca2c57240f8bc32fd0349f8b8ea3ee0989a.001.1","noaa_urn:oid:2.49.0.1.840.0.5af5b1d9afeb55889a616cd74f21b62e26479da9.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 SE Aberdeen |
| Iem County | Brown |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | Report from mPING: Street/road flooding; Street/road closed; Vehicles stranded. |
| MergedSources | [{"id":"iem_F_45.460_-98.480_1785449160000","source":"iem","severity":"low","severityValue":25,"timestamp":1785449160000,"latitude":45.46,"longitude":-98.48}] |
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.
Want to know when something happens near Aberdeen?