Free for Windows, Android and the web

Weather for people who watch the sky.

Live NEXRAD radar, severe weather alerts that tell you when the storm arrives, and forecasts from eleven models. Free, open source, with no ads and no account needed.

Download Storm Central Open in your browser

Version 0.4.5 for Windows 10 and 11, Android 7 and newer, and any modern browser.

Storm Central's radar mode: the NEXRAD mosaic over Oklahoma and Texas with storm tracks, a reflectivity legend and the future radar timeline.

One app, five ways to read the sky

Switch modes with a tap or the 1 to 5 keys. Each one is built around the questions you actually ask before you head out.

Daily

Your day at a glance

A 15-minute nowcast, hourly and 10-day forecasts, and the forecasters' own notes from your local National Weather Service office, with the jargon decoded. Pick from eleven forecast models, including ECMWF, GFS, the NWS Blend and ICON.

  • Compared with normal: records, rainfall this month, the week's departures
  • Storm Prediction Center tornado, hail and wind odds when you're in a risk area
  • Rainfall and flooding, fire weather and smoke, river gauges

Radar

Radar that keeps up with storms

The national mosaic or any single NEXRAD site, with velocity, correlation coefficient and the rest. Warning polygons in official colors, projected storm tracks with the arrival time at your location, and six hours of future radar after the live loop.

  • Lightning, storm reports, hail cores and rotation from NEXRAD storm cells
  • Hurricane cones and tracks, and GOES satellite that loops with the radar
  • Export the loop as a GIF or video

UAV pilot

Know before you fly

A flyability score for your airframe, an hourly go/no-go strip, and wind at flight altitude against your drone's limit. Kp index, GNSS satellites and precision, and the estimated cloud ceiling against the Part 107 clearance.

  • Wind profile at 10, 80, 120 and 180 m, with shear and veer
  • Satellite sky plot with count, PDOP and HDOP
  • Visibility and density altitude

Air and allergy

Air you can plan around

An air quality heatmap across the map, current AQI with health guidance, and the cleanest two-hour window to be outside. Pollen and UV forecasts, and a breakdown of each pollutant.

  • 48-hour AQI and UV forecast
  • Smoke and haze from wildfires
  • Angler mode, too: bite index, solunar periods and live river gauges

Warned before the storm arrives

Save up to ten places and Storm Central watches them for you. Windows keeps checking from the tray, and Android checks about every 15 minutes in the background, even with the app closed.

  • New warnings for any saved place, and whether you're inside the warned polygon, not just the county
  • Storms heading your way, with the arrival time, hail size and motion
  • Rain or snow starting soon, how hard and for how long
  • Lightning nearby, a morning briefing, and your own custom alerts
4:475G

Thursday, May 21

4:47

  • Storm Central Tornado Warning: Home Cleveland County until 5:15 PM CDT. You are inside the warned area. Take shelter now.
  • Storm Central Storm heading toward Work Arriving in about 18 min. Hail up to 1.75 in, moving northeast at 35 mph.
  • Storm Central Rain starting in about 20 min Moderate rain, lasting about 45 min.
11forecast models to choose from
6radar products, from reflectivity to hydrometeor type
5modes: Daily, Radar, UAV pilot, Angler, Air
0ads, accounts or API keys required

Everything else it does

Built on free and open data from NOAA, the National Weather Service and Open-Meteo.

Storm arrival times

The storm motion in each NWS warning becomes a projected track and a live arrival estimate for where you are.

Spotter network

Post geotagged reports with photos, verify each other's, and see them on the radar. Locations are rounded for privacy.

Widgets and tray

Five Android home-screen widgets with the top warning, and a Windows tray icon that shows the temperature and any warning.

Works offline

The app is cached, and the last forecast stays readable for three days with no signal, labelled with when it was saved.

English and Spanish

Follows your device's language, or pick one in Settings. Notifications and widgets are translated too.

Custom alerts

"Wind at 120 m below 15 mph" or "AQI above 100": any number, for any saved place, once a day when the forecast crosses it.

Themes and add-ons

Light, dark or system theme, every unit set separately, and themes or map layers installed from GitHub.

Open source

Every line is on GitHub. No paid weather APIs, no tracking, and the Windows app runs its own server on your PC.

See it in motion

A 50-second tour of the app.

Get Storm Central

Free on every platform. The apps update themselves when a new version is out.

Android

Android 7.0 and newer

Download the APK

Open the file on your phone and allow your browser to install apps when asked. After that, the app updates itself.

Web

Any modern browser, including iPhone and iPad

Open the web app

On iPhone and iPad, open it in Safari and choose Share, then Add to Home Screen, to use it like an app.

Latest version: 0.4.5. Release notes and older versions.