Right now
The most recent data we hold from METEOALARM arrived 59 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 6 September 2026 at 06:00 UTC. It is kept here as a record.
No stronger detection stands among the 7 recorded within 20 km of this point since 6 September 2026 — 6 others scored the same.
What the source measured
METEOALARM reported: MeteoAlarm carries a moderate warning for Viana do Castelo (Yellow Thunderstorm Warning). Issued by the national meteorological service of Portugal. Placed at Viana do Castelo, the nearest settlement in the warned area; the warning itself covers the whole area.
Urban PEI: 518,855 within a heuristic 50 km radius; not unique people.
Nearby, since 6 September 2026
- September 20, 2026 · score 41 · 0.0 km
- September 14, 2026 · score 41 · 0.0 km
- September 13, 2026 · score 41 · 0.0 km
How we know
2 recorded sources include METEOALARM; independence is not established by this count.
Our own score for this event is 41 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 41 / 100 |
| Legacy data-support index | 0.71/1 |
| Coordinates | 41.6900, -8.8300 |
| Nearest City | Viana do Castelo (0 km) |
| Urban exposure index (PEI) | 518.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-06T02:49:00.000Z |
| Source | https://meteoalarm.org?region=PT |
Physical priority index · v4 (historical). 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: meteoalarm. Occurrence: 2026-09-06T02:49:00.000Z.
First archived: 2026-09-06T00:53:28.768Z. 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 | Yellow Thunderstorm Warning |
| CapSeverity | Moderate |
| CapCertainty | Likely |
| CapUrgency | Expected |
| AreaDesc | Viana do Castelo |
| EmmaId | PT006 |
| CountryCode | PT |
| Country | Portugal |
| Expires | 2026-09-06T06:00:00+00:00 |
| PlacedAt | Viana do Castelo |
| Placement | area-name |
| Ipma AwarenessLevel | yellow |
| Ipma AwarenessTypeName | Trovoada |
| Ipma DistrictId | VCT |
| Ipma DistrictName | Viana do Castelo |
| Ipma StartTime | 2026-09-06T02:49:00 |
| Ipma EndTime | 2026-09-06T06:00:00 |
| MergedSources | [{"id":"ipma_VCT_2026-09-06","source":"ipma","severity":"medium","severityValue":40,"timestamp":1788662940000,"latitude":41.69,"longitude":-8.83}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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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