Right now
The most recent data we hold from NOAA arrived 7 minutes ago, and this point is in it.
5 other detections within 20 km in the last 24 hours, the nearest 6 km from here.
This alert is in force until 18 September 2026, 08:30 UTC.
It is the strongest of the 68 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: Flash Flood Warning issued September 17 at 10:25PM MDT until September 18 at 2:30AM MDT by NWS Pocatello ID
Urban PEI: 86,847 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- August 13, 2026 · score 39 · 12.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 45 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 | High |
| Calamity Score (ours) | 45 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 43.7176, -111.8029 |
| Nearest City | Rexburg (13 km) |
| Urban exposure index (PEI) | 86.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-18T04:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.93078e77102b8b9b82d4302ef06a553e5eb3ffdb.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: 2026-09-18T04:25:00.000Z.
First archived: 2026-09-18T04:28:53.828Z. Material modification: 2026-09-18T04:50:56.873Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-18T05:55:11.976Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:49:49.334Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:44:28.231Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:39:08.088Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:28:25.279Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:23:05.155Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:17:42.696Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:12:22.243Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:07:00.478Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T05:01:38.662Z · data_change
Index 45 → 45; severity high → high; version 5 → 5.
2026-09-18T04:50:56.873Z · data_change
Index 32 → 45; severity medium → high; version 5 → 5.
2026-09-18T04:45:36.618Z · data_change
Index 32 → 32; severity medium → medium; version 5 → 5.
2026-09-18T04:39:44.233Z · data_change
Index 32 → 32; severity medium → medium; version 5 → 5.
2026-09-18T04:34:24.926Z · data_change
Index 32 → 32; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, ID; Madison, ID; Bonneville, ID; Jefferson, ID; Madison, ID |
| Headline | Flash Flood Warning issued September 17 at 10:25PM MDT until September 18 at 2:30AM MDT by NWS Pocatello ID |
| Expires | 2026-09-18T02:30:00-06:00 |
| SenderName | NWS Pocatello ID |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.93078e77102b8b9b82d4302ef06a553e5eb3ffdb.001.1","noaa_urn:oid:2.49.0.1.840.0.521ca0b82a64c4cd10076caa161c02fe14a7c92f.001.1","noaa_urn:oid:2.49.0.1.840.0.a28789e61ad4c02368d41a4d7cfa6b2009bd536a.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Firth |
| Spc County | Bingham |
| Spc State | ID |
| Spc Comments | (PIH) |
| MergedSources | [{"id":"spc_wind_43.72_-112.53_5","source":"spc","severity":"medium","severityValue":45,"timestamp":1789710692745,"latitude":43.72,"longitude":-112.53},{"id":"spc_hail_43.19_-112.33_13","source":"spc","severity":"high","severityValue":65,"timestamp":1789700400000,"latitude":43.19,"longitude":-112.33},{"id":"spc_hail_43.22_-112.37_14","source":"spc","severity":"high","severityValue":65,"timestamp":1789701300000,"latitude":43.22,"longitude":-112.37},{"id":"spc_hail_43.31_-112.18_15","source":"spc","severity":"high","severityValue":65,"timestamp":1789702500000,"latitude":43.31,"longitude":-112.18}] |
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 Rexburg?