County encoding
ARC H-Hour planning phase
H-120 readiness
Public H-Hour estimate unavailable
Waiting for the first as-issued NHC most-likely tropical-storm-force wind arrival product.
H-120 guided checklist
Loading summarized operational guidance.
Condensed public beta guidance; authoritative procedures and incident leadership direction control.
What changed in the last six hours?
Loading the selected historical event.
H-120 decision snapshots
County detail
Select a county to inspect its model inputs and current state.
Method and sources
Archived NHC operational advisories, most-likely tropical-storm-force wind arrival products, advisory-time 34/50/64 kt wind radii, and NOAA NDFD alert grids are shown only after release. The H-Hour value is a public NHC-derived proxy, not a historical ARC or NHQ H-Hour record.
NDFD surfaces are selected concurrent operational alert evidence. County percentages are app-computed area intersections; they do not imply whole-county coverage or source attribution to the named storm. Short-fuse warning absence does not mean no warning existed.
County height is a transparent planning model based on households, track distance, hurricane risk, and social vulnerability. FEMA Individual Assistance designation is a separate post-event administrative outcome.
The display does not represent observed need, Red Cross caseload, capacity, deployment, or movement.