Tropical Storm Watch in United States
Right now
The most recent data we hold from NOAA arrived 9 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 6 September 2026 at 17:00 UTC. It is kept here as a record.
It is the 12th strongest of the 42 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tropical Storm Watch issued September 5 at 10:53PM HST by NWS Honolulu HI
Nearby, since 15 March 2026
- September 8, 2026 · score 46 · 0.0 km
- September 7, 2026 · score 46 · 0.0 km
- September 6, 2026 · score 16 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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.
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.
Event data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.62/1 |
| Coordinates | 22.0197, -159.6108 |
| Nearest city | Schofield Barracks (169 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact tier | minor |
| Timestamp | 2026-09-06T08:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.001.1 |
| Licence | US public domain · NOAA National Weather Service |
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: noaa. Occurrence: 2026-09-06T08:53:00.000Z.
First archived: 2026-09-06T08:57:27.351Z. 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 | Tropical Storm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Niihau; Kauai Mountains; Kauai Southwest and 3 more areas |
| Headline | Tropical Storm Watch issued September 5 at 10:53PM HST by NWS Honolulu HI |
| Expires | 2026-09-06T07:00:00-10:00 |
| SenderName | NWS Honolulu HI |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.001.1","noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.006.1","noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.005.1","noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.003.1","noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.002.1","noaa_urn:oid:2.49.0.1.840.0.199e0068f0aa0830c94dea919d82f9f0961288eb.004.1"] |
Safety information
What to do in a tropical cyclone
Three things first, then how little water it takes, and what to do before, during and after. From FEMA’s Ready.gov and the US National Hurricane Center.
For this reportSevere Weather · United States
Leave if you are told to
If you live in an evacuation zone and authorities order it, go at once. Water kills most: storm surge, the sea pushed ashore, and flooding rain.
Ready.gov · NHCShelter in an inner room
Away from windows, on the lowest floor that will not flood. If water rises, go up, never into a closed attic.
Ready.govStay in when the wind drops
The calm of the eye can last minutes before the wind returns from the other side.
Ready.gov · NHC
It takes very little moving water
Moving water. Figures from the US National Weather Service, “Turn Around Don’t Drown”. Person, car and water are drawn to the same scale.
Before, during, after. Here it is “after”.
Before · When a cyclone is forecast
Know your evacuation zone
And the route out of it.
Prepare the house
Bring in outdoor furniture, clear gutters, protect windows.
Supplies for several days
Water, food, medicines, torches, batteries, phone chargers.
Help your neighbours
Especially older people and those who need assistance.
Ready.gov (FEMA)
During · While the storm passes
Stay indoors
Inner room, away from windows.
Never into floodwater
Fifteen centimetres of moving water can knock you down, thirty can carry your car.
Keep listening
Official alerts and local radio.
Ready.gov (FEMA)
After · When the storm has passed
Keep away from power lines
And from anything touching them.
Generators outdoors only
Their fumes kill indoors.
Avoid floodwater
It can carry sewage, chemicals and electricity.
Messages, not calls
Keep lines free for emergencies.
Ready.gov (FEMA)
Questions people ask
What is storm surge?
The sea pushed onto land by the storm’s wind. It is often the greatest threat to life in a tropical cyclone, and can flood far inland. Source: US National Hurricane Center.
Cyclone, hurricane, typhoon: what is the difference?
The same storm with different names by ocean: hurricane in the Atlantic and north-east Pacific, typhoon in the north-west Pacific, cyclone in the Indian Ocean and South Pacific.
Is the calm in the middle the end?
No. It is the eye; the wind returns from the opposite side, often as strong. Stay indoors. Source: Ready.gov (FEMA).
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