Signal Strength (dBuV/m)
>80 — Strong
60-80 — Moderate
40-60 — Usable
20-40 — Weak
Coverage Gap (<30 dBuV/m)
ⓘ Click any part of the map for a Signal Probe
FEMA Emergency Communications Deployment Simulation — On September 27, 2024, Hurricane Helene made landfall as a Category 4 hurricane and devastated western North Carolina. Asheville and surrounding communities experienced catastrophic flooding along the French Broad and Swannanoa Rivers, with over 30 inches of rainfall in some areas. Cellular infrastructure was destroyed, roads were impassable, and communities were cut off for days. This simulation models a FEMA emergency communications deployment using Longley-Rice terrain-aware propagation modeling to visualize coverage in the mountainous terrain of the Blue Ridge Mountains. Public safety assets below are real agencies sourced from the FCC databases, Buncombe County public records, RadioReference.com, and ARRL/ARES documentation.
Powered by Dxtra Longley-Rice ITM terrain-aware propagation modeling · Coverage computed over SRTM 30m elevation data · Glassmenu™ digital signage for Emergency Operations Centers
ⓘ Click anywhere on the map to see a Signal Probe Analysis — signal strength from all deployed assets at that location