Polygon

Severe weather app for the US that uses real NWS CAP polygons. Tornado lightning flood alerts judged by your exact location. NEXRAD radar and 7-day forecast includedPolygon uses official NWS polygons to eliminate the false alarms that wake you up when a warning is issued for the next county over

[Differentiator]

Real CAP Polygon Detection

Precisely determines whether your current location falls inside the GeoJSON polygon of an active NWS warning You will never be woken by warnings outside your polygon

[Key Features]

Real-time NEXRAD Radar

Live precipitation across the United States with past frame animation to track storm movement

7-Day Forecast

Official forecasts from the National Weather Service Check current location and multiple saved cities on one screen

Push Notifications Only For Polygon Hits

Receive notifications only for warnings that actually affect you No more being woken at night by alerts for the next town

Multiple Cities Support

Choose from 40 major cities including New York Chicago and Los Angeles Swipe horizontally on the home screen to switch

Hurricane Tracking

Display current hurricane track and forecast cone from official NHC data on the map

SPC Tornado Risk Outlook

Show tornado risk level for your location from the SPC Day 1 Convective Outlook

[Recommended For]

Residents of tornado prone areas

Coastal residents in hurricane zones

Outdoor sports and event organizers

Farmers and agricultural workers

Weather enthusiasts

[Data Sources]

All data uses official public sources from NWS NOAA SPC and NHC Completely free public data

[Premium Features]

Remove all ads unlimited saved locations 24 hour past radar animation lightning notifications

[Disclaimer]

This app is NOT an official warning source Always use NOAA Weather Radio and official NWS alerts as your primary source This app is not affiliated with or endorsed by NOAA or the National Weather Service