Surf Forecasts and Marine Weather - No Hype - Just the Facts!
Tropics On Fire As Water Temperatures Poised to Surpass 1997! - Video HERE (9/6/26)
Buoys | Buoy Forecast | Bulletins | Models: Wave - Weather - Surf - Altimetry - Snow | Pacific Forecast | QuikCAST | El Nino | Tutorials | Great Circles | Video

Google
Create Your Own Surf Forecast
Swell Calculator
Swell Decay Tables
Sea Height Tables
Swell Category Table
.

Mammoth - Wind Forecast
Location: 37.64N 119.02W
Base Elevation: 7953 ft
Peak Elevation: 11053 ft

 

240 hour GFS Model (0.25 deg) - 3 hr incrememts

 

Data

Initialized: 18Z Fri 11SEP2026
Day Frcst Time/Date Speed (kts) Gust (kts) Dir (degs) MidSpd (kts) Gust (kts) Dir (degs)
Fri 10AM 11SEP26 17.1 26.6 236 12.8 19.2 227
Fri 01PM 11SEP26 19.1 29.7 231 16.3 24.5 226
Fri 04PM 11SEP26 16.5 25.8 233 13.3 19.9 222
Fri 07PM 11SEP26 10.5 16.4 239 7.6 11.4 224
Fri 10PM 11SEP26 7.1 11.1 231 5.3 7.9 219
Sat 01AM 12SEP26 8.3 12.9 244 6.4 9.5 238
Sat 04AM 12SEP26 10.7 16.7 249 8.2 12.3 243
Sat 07AM 12SEP26 13.6 21.2 257 12.8 19.2 254
Sat 10AM 12SEP26 19.1 29.9 257 19.0 28.6 253
Sat 01PM 12SEP26 22.0 34.3 241 23.7 35.5 241
Sat 04PM 12SEP26 24.3 37.9 253 24.3 36.4 250
Sat 07PM 12SEP26 24.4 38.1 259 20.0 30.1 255
Sat 10PM 12SEP26 27.5 42.9 259 18.4 27.6 253
Sun 01AM 13SEP26 29.1 45.4 258 17.7 26.5 252
Sun 04AM 13SEP26 30.3 47.2 259 19.7 29.5 254
Sun 07AM 13SEP26 28.1 43.8 258 17.3 26.0 252
Sun 10AM 13SEP26 27.3 42.6 254 17.5 26.2 246
Sun 01PM 13SEP26 22.2 34.6 238 15.8 23.7 222
Sun 04PM 13SEP26 16.2 25.3 238 10.1 15.1 218
Sun 07PM 13SEP26 10.4 16.3 234 5.3 7.9 210
Sun 10PM 13SEP26 10.6 16.5 260 9.0 13.5 260
Mon 01AM 14SEP26 17.6 27.4 274 12.5 18.7 280
Mon 04AM 14SEP26 16.4 25.7 268 9.2 13.9 269
Mon 07AM 14SEP26 13.8 21.6 269 7.5 11.3 269
Mon 10AM 14SEP26 15.4 24.1 274 12.1 18.1 272
Mon 01PM 14SEP26 10.0 15.6 247 9.4 14.0 250
Mon 04PM 14SEP26 9.8 15.3 230 9.5 14.2 228
Mon 07PM 14SEP26 7.2 11.2 228 10.3 15.5 249
Mon 10PM 14SEP26 14.0 21.8 258 14.7 22.1 254
Tue 01AM 15SEP26 16.9 26.4 259 15.1 22.6 258
Tue 04AM 15SEP26 17.0 26.5 258 12.6 19.0 255
Tue 07AM 15SEP26 16.8 26.2 260 13.3 19.9 257
Tue 10AM 15SEP26 15.9 24.8 258 13.5 20.2 253
Tue 01PM 15SEP26 14.4 22.4 234 14.1 21.1 231
Tue 04PM 15SEP26 12.7 19.9 229 15.8 23.7 241
Tue 07PM 15SEP26 7.9 12.3 191 11.3 17.0 230
Tue 10PM 15SEP26 9.7 15.1 245 12.0 18.0 242
Wed 01AM 16SEP26 10.0 15.5 248 13.2 19.9 250
Wed 04AM 16SEP26 12.0 18.8 254 15.4 23.1 252
Wed 07AM 16SEP26 12.4 19.3 261 15.7 23.5 252
Wed 10AM 16SEP26 9.3 14.5 285 12.5 18.8 280
Wed 01PM 16SEP26 8.2 12.7 247 11.4 17.1 246
Wed 04PM 16SEP26 6.6 10.4 187 11.1 16.6 239
Wed 07PM 16SEP26 8.6 13.4 179 12.3 18.4 228
Wed 10PM 16SEP26 11.6 18.2 242 17.8 26.7 242
Thu 01AM 17SEP26 15.1 23.5 253 20.3 30.4 255
Thu 04AM 17SEP26 16.7 26.1 257 21.6 32.4 259
Thu 07AM 17SEP26 17.1 26.6 261 20.1 30.2 261
Thu 10AM 17SEP26 14.8 23.1 262 17.8 26.7 258
Thu 01PM 17SEP26 14.7 22.9 227 18.4 27.6 237
Thu 04PM 17SEP26 12.7 19.9 227 17.7 26.5 245
Thu 07PM 17SEP26 9.7 15.1 238 13.4 20.2 243
Thu 10PM 17SEP26 10.6 16.5 248 12.5 18.7 250
Fri 01AM 18SEP26 11.0 17.1 248 13.0 19.5 252
Fri 04AM 18SEP26 13.2 20.5 253 14.2 21.4 254
Fri 07AM 18SEP26 13.5 21.1 259 13.7 20.5 258
Fri 10AM 18SEP26 12.6 19.7 249 13.2 19.8 249
Fri 01PM 18SEP26 15.2 23.7 232 15.6 23.3 231
Fri 04PM 18SEP26 13.8 21.6 235 15.3 23.0 237
Fri 07PM 18SEP26 9.8 15.3 240 12.0 18.1 246
Fri 10PM 18SEP26 9.5 14.8 245 11.4 17.2 250
Sat 01AM 19SEP26 14.3 22.2 256 13.9 20.9 255
Sat 04AM 19SEP26 17.2 26.9 258 15.0 22.5 257
Sat 07AM 19SEP26 17.7 27.6 261 13.0 19.5 259
Sat 10AM 19SEP26 15.4 24.0 250 12.9 19.3 245
Sat 01PM 19SEP26 16.1 25.0 235 14.7 22.0 228
Sat 04PM 19SEP26 16.1 25.1 238 13.4 20.2 226
Sat 07PM 19SEP26 15.7 24.6 253 11.9 17.9 247
Sat 10PM 19SEP26 14.3 22.3 252 11.6 17.4 250
Sun 01AM 20SEP26 15.7 24.4 256 12.5 18.7 254
Sun 04AM 20SEP26 16.7 26.0 257 12.2 18.3 254
Sun 07AM 20SEP26 16.9 26.4 260 11.5 17.2 257
Sun 10AM 20SEP26 17.5 27.2 254 12.1 18.1 247
Sun 01PM 20SEP26 16.8 26.1 232 13.4 20.1 219
Sun 04PM 20SEP26 16.6 26.0 236 11.8 17.7 220
Sun 07PM 20SEP26 15.8 24.7 253 12.8 19.2 249
Sun 10PM 20SEP26 18.1 28.2 256 15.0 22.6 254
Mon 01AM 21SEP26 18.5 28.9 256 14.9 22.3 253
Mon 04AM 21SEP26 17.1 26.7 255 13.8 20.7 253
Mon 07AM 21SEP26 14.8 23.1 256 12.1 18.2 253
Mon 10AM 21SEP26 13.9 21.7 247 11.9 17.9 242

.
Contact | About | Disclaimer | Privacy
Advertise/Content | Links
Visit Mark Sponsler on Facebook Visit Stormsurf on Instagram Visit Stormsurf on YouTube
Copyright © 2026 STORMSURF - All Rights Reserved
This page cannot be duplicated, reused or framed in another window without express written permission.
But links are always welcome.
Buoys | Buoy Forecast | Bulletins | Models: Wave - Weather - Surf - Altimetry - Snow | Pacific Forecast | QuikCAST | El Nino | Tutorials | Great Circles | Calculator