Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
4 other detections within 20 km in the last 24 hours, the nearest 11 km from here.
This alert expired on 20 March 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 64 recorded within 20 km of this point since 12 March 2026 — 30 others scored the same. Another comparable one was recorded here earlier the same day. 32 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued March 20 at 10:37AM HST until March 20 at 1:00PM HST by NWS Honolulu HI
Nearby, since 12 March 2026
- March 21, 2026 · score 22 · 0.0 km
- March 20, 2026 · score 22 · 0.0 km
- May 16, 2026 · score 22 · 3.3 km
How we know
Confirmed by 14 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % 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 | 71% |
| Coordinates | 21.4980, -158.0192 |
| Nearest City | Wahiawā (0 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-20T20:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.68febda6f862196a12f629b7980e26c1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Oahu in Honolulu, HI |
| Headline | Flash Flood Warning issued March 20 at 10:37AM HST until March 20 at 1:00PM HST by NWS Honolulu HI |
| Expires | 2026-03-20T13:00:00-10:00 |
| SenderName | NWS Honolulu HI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.68febda6f862196a12f629b7980e26c1f0f5bde8.001.1","noaa_urn:oid:2.49.0.1.840.0.bb85d07b1d3f706a18bb02af69fdf0a98fc5309e.001.1","noaa_urn:oid:2.49.0.1.840.0.b8fc4ab8095b0fd6758d23cf431f1f7a2fc23337.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 11 |
| Iem Unit | Inch |
| Iem City | 1 SW Haleiwa |
| Iem County | Honolulu |
| Iem State | HI |
| Iem Wfo | HFO |
| Iem Remark | Retired NWS employee reports 11 inches of rain overnight. |
| Google News RssFeed | weather |
| Google News SourceName | Honolulu Star-Advertiser |
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 near Wahiawā?
Calamity.live data shows a weather event with CalamityScore 22/100, near Wahiawā (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.