This alert expired on 15 March 2026 at 16:00 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 15 March 2026.
What the source measured
NOAA reported: Flash Flood Warning issued March 15 at 12:54AM HST until March 15 at 6:00AM HST by NWS Honolulu HI
Nearby, since 15 March 2026
- August 13, 2026 · score 34 · 17.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 57 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 22 / 100 |
| Our confidence | 57% |
| Coordinates | 19.6290, -155.4467 |
| Nearest City | Hilo (39 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-15T10:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_815c4d7f7538f71958b5eac45cc6bce1f5ab71ce_001_1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Hawaii in Hawaii, HI |
| Headline | Flash Flood Warning issued March 15 at 12:54AM HST until March 15 at 6:00AM HST by NWS Honolulu HI |
| Expires | 2026-03-15T06:00:00-10:00 |
| SenderName | NWS Honolulu HI |
| HasExactCoords | true |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.