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 31 July 2026 at 01:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 54 detections recorded within 20 km of this point since 31 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 30 at 6:53PM CDT until July 30 at 8:00PM CDT by NWS Grand Forks ND
Urban PEI: 57,011 within a heuristic 50 km radius; not unique people.
Nearby, since 31 March 2026
- September 3, 2026 · score 45 · 21.0 km
- June 3, 2026 · score 32 · 22.5 km
How we know
4 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 | 0.91/1 |
| Coordinates | 47.9240, -97.0510 |
| Nearest City | Grand Forks (2 km) |
| Urban exposure index (PEI) | 57.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-30T23:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.818deef3977b5096ddf4cc8d93003918721d5d9c.001.1 |
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: 2026-07-30T23:53:00.000Z.
First archived: 2026-07-31T00:59:00.420Z. 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 | Polk, MN; Grand Forks, ND |
| Headline | Flash Flood Warning issued July 30 at 6:53PM CDT until July 30 at 8:00PM CDT by NWS Grand Forks ND |
| Expires | 2026-07-30T20:00:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 57 |
| Iem Unit | MPH |
| Iem City | 2 E Emerado |
| Iem County | Grand Forks |
| Iem State | ND |
| Iem Wfo | FGF |
| Iem Remark | NDAWN mesonet site 2 miles east of Emerado recorded 57 mph 30 ft wind gust at 4:10 pm CDT. |
| MergedSources | [{"id":"iem_F_47.890_-97.060_1785448380000","source":"iem","severity":"low","severityValue":25,"timestamp":1785448380000,"latitude":47.89,"longitude":-97.06},{"id":"iem_D_47.870_-97.060_1785447300000","source":"iem","severity":"low","severityValue":25,"timestamp":1785447300000,"latitude":47.87,"longitude":-97.06},{"id":"iem_G_47.920_-97.320_1785445800000","source":"iem","severity":"low","severityValue":25,"timestamp":1785445800000,"latitude":47.92,"longitude":-97.32}] |
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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