Display height scale: 20×. Labels show measured IEM NEXRAD echo-top estimates. Footprint width is symbolic, not storm size. Automated guidance, not an official warning.
TVSMesocycloneHailOther
StormView Radar
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Local Time
Saved Locations
ChasecasterStarting sensors…
NESW
—° —
Accuracy—Speed—
For situational awareness only. Do not interact with StormView while driving.
Storm training
Archived training example · Not live · Not an official warning
Choose an archived example to begin.
75+ dBZ6555453525155 dBZ
Alerts without map geometry
Mini radarCurrent view
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Fetching forecast...
HRRR
Export radar animation
Capture the current map and attribution across up to 24 sampled radar frames.
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Offline · cached data may be unavailable
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Install StormView RadarOffline-ready: the app shell and last radar frame are cached on this device.
Settings
Appearance
Dark Theme
Show Legend
Reduced Data
Load fewer frames and pause data-heavy optional overlays
Border Style
State Border Width
2px
County Border Width
1px
Border Opacity
60%
Overlay Visibility
Adjust each map overlay independently. Radar opacity remains in the Radar tab.
100%
Import / Export
Local Map Overlay
Load a session-only GeoJSON or KML file (maximum 2 MB, 500 features, and 50,000 coordinate pairs). Local overlays are never saved or sent over the network.
No local overlay loaded
Radar Display
Opacity
85%
Smooth Radar
Interpolate radar tiles
Snow Colors
Pink shading for snow
High-Res Mode
MRMS enhancement when zoomed in (US only)
Color Scheme
Applies a display transform to provider tiles and native colors to Level II, alerts, hail, and storm analysis. It does not change the source data.
Animation
Frame Delay
600ms
Preload Window
Frames kept ready before and after the playhead
4 frames each side
Auto-Refresh
Update every 5 minutes
Loop Animation
Historical Replay
Replay IEM NEXRAD composites and storm-based warning polygons. Times use your browser timezone; ranges are limited to 6 hours.
Live mode
Audio Notifications
Alert Sounds
Opt in to a tone for newly issued matching alerts
The first alert load is always silent. Keep the map centered on the area you care about; alerts without polygons only match “Any distance.” Browsers may require Test Sound once per tab.
Saved Geofences
Add a private alert radius at the current map center. Geofences stay only in this browser profile.
OpenWeatherMap
Required for Temperature, Wind, Clouds, and Pressure layers
Keys are stored unencrypted in this browser profile and sent directly to their providers. Anyone with local browser access can read them. Settings exports always omit keys.
Radar & Freshness
App version
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Provider / product
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Result
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Valid time / age
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Coverage
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Resources
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Overlay loads
None
Retry / backoff
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Tile providers
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Redacted Request Results
Reports omit API keys, query strings, bookmarks, and precise coordinates.
StormView Radar
