Loading advisory…
Storm
Forecast track and cone
The cone from the National Hurricane Center's own GIS feed, redrawn at each advisory. It shows where the center may go — not where the impacts reach, which extend far beyond it. Turn on radar to see where the rain actually is: it updates every couple of minutes, far more often than the alerts.
Your island
Alerts are pulled zone by zone from the National Weather Service. Pick your island, then narrow to your area.
Radar and satellite
Where the rain is right now, updating far more often than the alerts. There is no radar on Oʻahu — the Molokaʻi site covers it. Open any image for the animated loop.
Every alert covering you
—
Timeline
Each bar is a real alert with the weather service's own start and end times. Bars fading out on the right have no published end yet.
Surf, shore by shore
Face height in feet by shore direction, from the National Weather Service Surf Zone Forecast. A storm to the southeast drives the east-facing shores hardest, and those are the coasts that flood first.
Mauka Stream gauges
Flash flooding is what actually kills people here, and it starts in the gulches long before anyone sees it on the coast. Color comes from each gauge's own National Weather Service flood stage, not from the number of feet.
When surge meets the tide
Storm surge rides on top of whatever the tide is already doing. The same surge is a nuisance at low water and a flooded street at high. These are NOAA tide predictions for Honolulu Harbor.
- Loading
- —
Predictions are astronomical only — they do not include the surge itself. Tides vary between islands and harbors; treat Honolulu as the reference, not your exact shoreline.
What to do next
—
Take this with you A one-page card for when the power goes and the phone is dying
Plain text, so it survives a screenshot, a message, a printer and a dead battery. It carries your alerts, what you have not done, the radio frequencies and the numbers to call — plus blanks to fill in by hand.
Shelters
Open shelters as reported by FEMA's National Shelter System, Honolulu's Department of Emergency Management and Hawaiʻi County Civil Defense. Counties open and close these faster than any feed moves, so treat every line as a report and confirm before you go.
Power
Where the lights are out, how many customers, and when the utility expects them back. Counts are customers rather than people, and during a storm a restore estimate is a plan, not a promise.
After it passes
More people are hurt in the days after a Hawaiʻi storm than during it — by generators, downed lines, floodwater and cleanup. Ordered by what harms you soonest.
Radio, outages and county contacts
Cell towers hold on batteries for hours, not days. Write these down.