Tile source .webp · Aeris direct (what v3.14+ uses) .png · Cloud Run tile server NOAA MRMS · free, own tile server Native tiles up to z6z8 (app cap) z10z11z12z14 Past window 40 min (app)1 h 2 h3 h6 h12 h24 h Past step 2 min (MRMS)5 min10 min (app)15 min30 min60 min Interpolate off1 min (server frames) 30 s (server frames) Nowcast off1 h 90 min2 h Nowcast step 5 min10 min15 min (GPU warps between) Forecast off3 h6 h 12 h18 h24 h (app) Forecast layer fradar · blend (app) fradar-hrrr · 3 km HRRR NOAA HRRR · free, own tile server Forecast step 1 h (both layers are hourly) Tile encoding colour PNG (32-bit)colour PNG, 8-bit palette colour WebP q80 Cadence uniformdense recent (step for 30 min, then 10 min) Playback zoom nativeone level lower while playing two levels lower while playing Skip empty tiles (index) NOAA floor 5 dBZ (everything)10 dBZ 15 dBZ20 dBZ Opacity

0.70

Crossfade none250 ms 500 ms (app)900 ms Upscale filter linearnearest Render tile layers (one image per frame) GPU shader (warp between frames) H.264 loop per tile + GPU warp Xweather MapsGL SDK (draws itself) NWS alerts (vector shapes) Look sharp (as rendered)soft edges + smoothedClassic NWS paletteGlass: light rain see-throughHeat: thermal rampInk: one colour, intensity as opacityOcean: cool rampContour: bands with outlinesOutline: edges onlyNeon: glowPastel: light, desaturated Video quality crf 18 (near lossless)crf 23crf 28 (smallest) Preload every frame Wind particles (wind product)

Tile source .webp · Aeris direct (what v3.14+ uses) .png · Cloud Run tile server NOAA MRMS · free, own tile server Native tiles up to z6z8 (app cap) z10z11z12z14 Past window 40 min (app)1 h 2 h3 h6 h12 h24 h Past step 2 min (MRMS)5 min10 min (app)15 min30 min60 min Interpolate off1 min (server frames) 30 s (server frames) Nowcast off1 h 90 min2 h Nowcast step 5 min10 min15 min (GPU warps between) Forecast off3 h6 h 12 h18 h24 h (app) Forecast layer fradar · blend (app) fradar-hrrr · 3 km HRRR NOAA HRRR · free, own tile server Forecast step 1 h (both layers are hourly) Tile encoding colour PNG (32-bit)colour PNG, 8-bit palette colour WebP q80 Cadence uniformdense recent (step for 30 min, then 10 min) Playback zoom nativeone level lower while playing two levels lower while playing Skip empty tiles (index) NOAA floor 5 dBZ (everything)10 dBZ 15 dBZ20 dBZ Opacity

0.75

Crossfade none250 ms 500 ms (app)900 ms Upscale filter linearnearest Render tile layers (one image per frame) GPU shader (warp between frames) H.264 loop per tile + GPU warp Xweather MapsGL SDK (draws itself) NWS alerts (vector shapes) Look sharp (as rendered)soft edges + smoothedClassic NWS paletteGlass: light rain see-throughHeat: thermal rampInk: one colour, intensity as opacityOcean: cool rampContour: bands with outlinesOutline: edges onlyNeon: glowPastel: light, desaturated Video quality crf 18 (near lossless)crf 23crf 28 (smallest) Preload every frame Wind particles (wind product)