> 1 ft above ground
> 3 ft
> 6 ft
> 9 ft
Zoom in for detail. NHC's reasonable worst case, not a prediction for every street.
Hurricane Warning
Hurricane Watch
Tropical Storm Warning
Tropical Storm Watch
Forecast cone
Estimated coast crossing
Points along the coast
How we know this
Every number on this page comes from a public government source, except the coast crossing, which we estimate and label as an estimate.
| What you see | Where it comes from | How much to trust it |
|---|---|---|
| Storm position, winds, pressure, warnings, surge heights, forecast points, cone | National Hurricane Center (NOAA) advisories and forecast maps | Official. Full advisories every 6 hours, updates every 3 hours or sooner. |
| Alerts for your address (warnings, local statements, flood watches) | National Weather Service alerts for your exact point | Official, issued by your local NWS office. |
| When tropical-storm winds may arrive | NHC arrival-time maps and forecast wind field | Official inputs. The wind field marks the farthest reach in each direction, so it leans cautious. |
| Storm surge flooding layer | NHC Potential Storm Surge Flooding map | Official reasonable worst case. Issued when surge watches or warnings are in effect. |
| Your address's location | U.S. Census Bureau geocoder | Good to the block. Not a rooftop survey. |
| Estimated coast crossing | Our calculation: where NHC's straight-line track between forecast points first meets the shoreline (Census coastline) | An estimate, not an NHC product. The real crossing can land anywhere in the cone; the cone is NHC's measure of that uncertainty. |
| Towns and landmarks in the table | U.S. Census Gazetteer; a short hand-checked list of beach landmarks | For orientation only. |
| Base map | U.S. Geological Survey, The National Map | For orientation only. |
Not used: news write-ups, social media, and individual computer-model runs ("spaghetti plots"). Your address is sent only to the Census Bureau to find its coordinates, and those coordinates only to the National Weather Service for alerts. We store nothing.