About Outside
Severe weather, hazards and forecasts at a glance, from free public data.
Where the data comes from
- National Weather Service — alertsEvery active warning, watch, advisory and statement — severe storms, tropical, flood, coastal, heat, winter, wind, fire, marine and more. Checked every minute. Zone-based alerts are outlined from NWS's own watch/warning map service.
- National Hurricane CenterActive storms with their forecast track, cone, coastal watches and warnings and past track, plus the 7-day tropical outlook. Checked every 10 minutes.
- Storm Prediction Center — storm reportsPreliminary tornado, wind and hail reports for the last one to five days (SPC days run 12Z to 12Z).
- Storm Prediction Center — convective outlooksCategorical risk for days 1–3 and tornado, wind and hail probabilities for days 1–2. Hatched areas mark conditional intensity.
- Weather Prediction Center — excessive rainfall outlookThe risk of rain heavy enough to cause flash flooding, days 1–5.
- NOAA MRMS (Multi-Radar Multi-Sensor)Radar for the continental US, colored rain or snow: every NEXRAD radar mosaicked by NOAA, with its precipitation type for each square kilometer. This server draws the last hour into map tiles itself, only while someone is looking.
- NOAA HRRR, via the Iowa Environmental MesonetFuture radar: the High-Resolution Rapid Refresh model's simulated reflectivity, hour by hour for the next 18 hours, from the latest hourly run.
- National Digital Forecast DatabaseThe National Weather Service's gridded forecast for the next week: temperature, feels-like, gusts, rain, rain chance, cloud cover and snow.
- Esri Gray CanvasThe map and its labels, in Dark Gray or Light Gray to match the theme. Esri, HERE, Garmin, © OpenStreetMap contributors.
- OpenStreetMap NominatimPlace search when saving a location. Only runs when you press Search.
What stays on this device
There are no accounts. Your saved places, filters and notification choices live in this browser only; the server keeps nothing but short-lived copies of the public feeds above, shared by everyone who opens it.
Why some features need HTTPS
Browsers only offer your location and notifications to secure pages. Outside answers on your local network over plain HTTP and on your tailnet over HTTPS: everything works on the tailnet address, and on the local address the map, lists and place search work but location and notifications don't.
Not an official warning source
Reports are preliminary and warnings can lag the source by a minute or more. For life-safety decisions, rely on NOAA Weather Radio, Wireless Emergency Alerts and local officials.