USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-10-16/00 UTC MPAS cell scale: 2.3 km FCST UTC UTC T Td Altim Spd Gust Dir Grid VVV RH1RH2RH3 T1T2T3 ACCUM HR DAY HR (C) (C) (in Hg)(kts)(kts)(deg)(deg) (*) (% wrt water) (C) (*) 0 16 00 -20.2 -22.7 28.76 2 4 110 321 000 90 73 62 -14-13-12 000 1 16 01 -19.4 -19.6 28.76 3 4 122 333 000 120 81 64 -14-13-12 000 2 16 02 -19.5 -19.7 28.73 2 4 108 319 001 120 85 61 -14-13-12 000 3 16 03 -19.3 -19.4 28.72 2 4 115 326 000 119 87 52 -14-13-13 000 4 16 04 -20.1 -20.2 28.71 2 5 135 346 001 120 86 44 -14-14-13 000 5 16 05 -21.0 -21.1 28.69 2 4 110 321 000 121 79 40 -14-13-12 000 6 16 06 -21.2 -21.3 28.68 3 5 108 319 000 122 68 39 -14-13-12 000 7 16 07 -21.7 -21.8 28.65 4 5 102 313 000 122 61 39 -14-13-12 000 8 16 08 -21.9 -22.0 28.61 4 5 96 307 001 122 54 41 -14-13-12 000 9 16 09 -21.3 -21.3 28.63 4 4 88 299 000 122 47 44 -13-12-12 000 10 16 10 -22.1 -22.1 28.60 5 5 75 286 000 122 46 47 -13-12-12 000 11 16 11 -23.2 -23.5 28.58 8 10 54 265 000 122 51 48 -14-13-12 000 12 16 12 -23.7 -24.1 28.56 7 8 43 254 000 123 54 48 -13-12-12 000 13 16 13 -23.0 -23.3 28.55 7 8 42 253 000 122 64 49 -13-12-12 000 14 16 14 -22.6 -23.4 28.54 7 8 39 250 000 114 64 51 -13-12-12 000 15 16 15 -21.6 -23.2 28.54 5 6 33 244 001 104 57 57 -13-12-12 000 16 16 16 -21.1 -23.4 28.52 5 6 37 248 002 96 53 63 -13-13-12 000 17 16 17 -20.3 -23.5 28.49 4 4 44 255 000 89 54 67 -13-13-12 000 18 16 18 -19.5 -23.6 28.50 3 3 61 272 001 81 54 70 -14-13-12 000 19 16 19 -18.9 -23.6 28.49 4 6 92 303 000 76 54 63 -14-13-13 000 20 16 20 -19.9 -24.0 28.45 6 8 92 303 000 77 47 50 -14-13-12 000 21 16 21 -20.2 -24.1 28.44 6 9 81 292 001 79 40 39 -14-13-12 000 22 16 22 -19.9 -24.1 28.42 6 8 83 294 -001 75 37 53 -13-12-12 000 23 16 23 -20.1 -24.5 28.41 6 10 76 287 -003 72 38 50 -13-12-12 000 24 17 00 -20.2 -25.0 28.39 6 11 76 287 -001 69 46 51 -13-12-12 000 25 17 01 -20.6 -24.6 28.38 7 13 76 287 -001 79 44 40 -13-11-11 000 26 17 02 -21.0 -23.8 28.37 8 14 69 280 -003 92 35 19 -12-11-11 000 27 17 03 -21.0 -24.3 28.34 10 15 61 272 -006 87 30 18 -12-11-10 000 28 17 04 -21.3 -24.0 28.33 10 15 65 276 -005 95 27 27 -12-10-10 000 29 17 05 -21.2 -23.4 28.32 11 19 69 280 -005 100 25 37 -11-10 -9 000 30 17 06 -20.4 -23.3 28.30 12 20 67 278 -004 91 25 42 -10 -9 -9 000 31 17 07 -19.8 -23.4 28.29 11 17 66 277 -001 82 25 47 -9 -9 -9 000 32 17 08 -19.5 -23.5 28.27 10 14 69 280 -005 76 23 50 -9 -8 -9 000 33 17 09 -19.5 -20.9 28.26 10 16 73 284 -002 105 39 41 -9 -9 -9 000 34 17 10 -19.3 -20.0 28.25 11 19 74 285 000 114 39 42 -10 -9 -9 000 35 17 11 -18.8 -19.9 28.24 11 19 67 278 -002 108 37 45 -9 -9 -9 000 36 17 12 -19.2 -19.7 28.24 11 18 59 270 -002 117 40 41 -9 -9 -9 000 37 17 13 -20.2 -20.7 28.23 10 18 50 261 000 120 41 41 -9 -9 -9 000 38 17 14 -20.1 -20.6 28.23 11 20 51 262 000 120 42 45 -9 -9 -9 000 39 17 15 -18.3 -19.2 28.23 12 21 58 269 -001 112 41 44 -9 -9 -9 000 40 17 16 -17.4 -19.3 28.23 11 17 54 265 -006 100 39 44 -9 -8 -8 000 41 17 17 -16.8 -19.0 28.23 11 16 50 261 -005 96 38 44 -9 -8 -8 000 42 17 18 -16.6 -18.7 28.24 10 15 53 264 -004 98 37 47 -9 -8 -8 000 43 17 19 -16.4 -18.6 28.25 9 15 59 270 -004 97 37 51 -9 -8 -8 000 44 17 20 -16.1 -18.3 28.26 10 17 61 272 -002 96 37 49 -9 -8 -8 000 45 17 21 -15.9 -19.0 28.26 10 18 59 271 -006 86 38 38 -8 -8 -8 000 46 17 22 -16.2 -19.5 28.27 11 19 62 273 -011 85 37 42 -8 -8 -8 000 47 17 23 -16.1 -19.7 28.29 11 20 65 276 000 82 36 41 -7 -7 -8 000 48 18 00 -15.1 -19.5 28.30 12 22 71 282 002 74 34 41 -7 -6 -7 000 49 18 01 -15.8 -19.5 28.31 12 25 69 280 002 81 29 33 -6 -5 -6 000 50 18 02 -14.4 -17.3 28.32 15 26 74 285 004 87 31 35 -5 -6 -6 000 51 18 03 -14.2 -16.1 28.32 16 26 74 285 006 97 29 31 -5 -5 -6 000 52 18 04 -14.6 -16.4 28.33 16 27 72 283 013 99 28 33 -6 -5 -6 000 53 18 05 -14.7 -15.8 28.35 17 29 65 276 014 105 37 35 -8 -7 -6 000 54 18 06 -14.5 -15.6 28.36 19 30 68 279 023 105 40 35 -9 -7 -7 000 55 18 07 -14.6 -15.8 28.38 19 31 65 276 018 105 36 42 -10 -6 -7 000 56 18 08 -15.0 -16.4 28.40 19 30 67 278 023 104 41 52 -8 -7 -7 000 57 18 09 -15.5 -17.3 28.41 19 32 66 277 031 100 51 54 -7 -7 -8 000 58 18 10 -15.4 -17.8 28.42 20 34 62 273 025 92 68 49 -8 -7 -8 000 59 18 11 -15.8 -18.4 28.44 18 32 63 274 027 92 60 56 -7 -7 -9 000 60 18 12 -16.5 -18.8 28.46 19 30 64 275 021 96 55 48 -8 -8 -9 000 61 18 13 -16.8 -19.2 28.47 17 27 66 277 014 95 48 47 -8 -8 -9 000 62 18 14 -17.0 -19.2 28.48 17 27 68 279 007 96 45 47 -8 -8 -9 000 63 18 15 -17.2 -19.2 28.48 18 28 69 280 008 99 52 47 -9 -9 -9 000 64 18 16 -17.0 -19.5 28.48 17 27 69 280 000 94 48 45 -9 -9-10 000 65 18 17 -16.5 -19.8 28.48 16 28 70 281 002 85 41 39 -8 -9 -9 000 66 18 18 -15.7 -19.5 28.48 16 26 74 285 010 81 35 32 -8 -8 -9 000 67 18 19 -15.2 -17.2 28.48 17 26 81 292 013 97 34 37 -8 -8 -8 000 68 18 20 -14.6 -17.7 28.47 16 24 81 292 013 87 36 50 -7 -7 -8 000 69 18 21 -14.9 -17.8 28.46 13 22 85 296 000 88 43 49 -7 -7 -8 000 70 18 22 -14.4 -17.6 28.44 15 26 85 296 000 85 44 53 -9 -8 -8 000 71 18 23 -14.1 -17.2 28.42 16 27 86 297 000 86 43 52 -10 -9 -9 000 72 19 00 -13.7 -16.8 28.41 17 28 88 299 -004 85 46 49 -11-10 -9 000 73 19 01 -13.8 -16.8 28.39 16 29 90 302 -006 86 50 47 -11-11 -9 000 74 19 02 -13.7 -16.9 28.36 17 31 92 303 -005 84 49 45 -11-11-10 000 75 19 03 -13.8 -16.8 28.32 19 32 93 304 000 86 46 42 -11-11 -9 000 76 19 04 -14.0 -17.2 28.30 21 33 94 305 -002 85 48 42 -11-11-10 000 77 19 05 -14.9 -17.8 28.28 20 31 90 301 -005 88 50 39 -12-11-10 000 78 19 06 -15.7 -18.5 28.26 19 31 88 299 -001 90 48 38 -11-11-10 000 79 19 07 -16.4 -18.9 28.23 18 30 86 297 -003 93 43 40 -11-10 -9 000 80 19 08 -16.7 -19.1 28.22 18 31 87 298 000 95 39 38 -11 -9 -9 000 81 19 09 -17.0 -19.2 28.20 18 30 85 297 -003 96 39 44 -10 -9 -9 000 82 19 10 -16.7 -19.3 28.19 18 30 81 292 -004 92 38 48 -9 -8 -8 000 83 19 11 -17.2 -19.8 28.19 20 32 79 290 -001 93 38 50 -8 -8 -8 000 84 19 12 -17.6 -20.1 28.19 19 29 78 289 -002 94 38 44 -7 -8 -8 000 85 19 13 -18.1 -20.5 28.19 18 32 72 283 000 96 32 34 -8 -7 -7 000 86 19 14 -17.9 -20.5 28.19 21 30 75 286 000 93 32 33 -7 -6 -7 000 87 19 15 -18.3 -20.7 28.20 19 27 71 282 005 96 37 39 -7 -7 -7 000 88 19 16 -18.4 -20.8 28.21 17 26 70 281 005 96 39 42 -7 -6 -8 000 89 19 17 -18.1 -20.8 28.21 16 25 72 283 002 93 40 45 -6 -6 -7 000 90 19 18 -17.8 -20.8 28.22 16 25 72 283 -001 89 39 41 -6 -6 -7 000 91 19 19 -17.4 -20.8 28.23 15 24 70 281 -003 86 38 40 -5 -6 -7 000 92 19 20 -17.1 -20.6 28.24 14 22 66 277 -001 84 39 43 -5 -6 -7 000 93 19 21 -16.7 -20.3 28.26 13 19 59 270 -001 83 42 47 -6 -6 -7 000 94 19 22 -16.2 -19.9 28.28 12 18 54 265 000 81 44 50 -6 -6 -7 000 95 19 23 -15.2 -19.2 28.31 10 16 45 256 -001 77 46 51 -6 -6 -7 000 96 20 00 -14.7 -18.8 28.33 10 15 36 247 000 77 50 53 -6 -6 -7 000 97 20 01 -15.4 -18.8 28.35 12 17 34 245 -002 83 54 53 -6 -7 -8 000 98 20 02 -16.5 -18.6 28.38 13 18 32 243 -004 98 57 55 -7 -7 -8 000 99 20 03 -17.2 -18.1 28.40 12 18 31 242 -001 111 67 58 -9 -8 -9 000 100 20 04 -17.6 -17.9 28.42 13 19 24 235 -004 118 79 57 -11-10-10 000 101 20 05 -17.2 -17.5 28.45 13 22 20 231 -005 117 71 62 -13-10-10 000 102 20 06 -17.1 -17.5 28.49 13 24 24 235 -005 117 70 74 -13-11-10 000 103 20 07 -16.6 -16.9 28.52 15 26 19 230 -004 117 72 76 -13-13-12 000 104 20 08 -16.8 -17.2 28.55 15 26 14 225 -003 117 79 74 -13-13-13 000 105 20 09 -17.3 -17.7 28.58 16 25 15 226 -007 118 85 76 -13-13-12 000 106 20 10 -19.0 -19.4 28.60 14 23 17 228 -007 120 88 63 -13-13-12 000 107 20 11 -19.6 -20.1 28.62 13 21 20 231 -005 120 77 54 -13-12-12 000 108 20 12 -19.7 -20.1 28.64 11 20 27 238 -008 120 81 49 -13-12-13 000 109 20 13 -19.7 -20.2 28.67 10 20 40 251 -008 120 90 43 -12-13-13 000 110 20 14 -20.0 -20.6 28.68 9 21 52 263 -006 120 76 43 -13-13-13 000 111 20 15 -19.4 -19.9 28.69 10 20 63 274 -006 120 55 51 -12-12-13 000 112 20 16 -18.8 -19.2 28.69 10 18 60 271 -005 119 46 41 -12-12-13 000 113 20 17 -17.8 -18.8 28.69 10 15 69 280 -005 110 51 41 -11-12-13 000 114 20 18 -16.9 -19.2 28.69 8 13 86 297 000 94 65 58 -11-12-13 000 115 20 19 -16.4 -19.1 28.69 7 15 112 323 000 88 60 57 -11-11-12 000 116 20 20 -15.7 -17.4 28.67 9 17 130 341 000 100 48 49 -10-11-12 000 117 20 21 -16.2 -19.1 28.66 8 17 127 338 004 88 37 48 -10-10-11 000 118 20 22 -16.0 -19.8 28.65 8 17 117 328 002 77 39 42 -9-10-11 000 119 20 23 -15.8 -20.4 28.63 9 17 120 331 001 71 39 38 -9-10-10 000 120 21 00 -16.3 -20.8 28.61 10 18 126 337 000 74 39 51 -10-10-10 000 * NOTES on units: VVV (vertical velocity) is given as tenths of a microbar per second at 700 hPa, with positive values indicating upward motion; ACCUM (accumulated precipitation, past 3h) is given as hundredths of a millimeter; RH1, RH2, and RH3 are the % RH at the surface, 1000', and 3000', respectively; T1, T2, and T3 are the temperatures at 500', 1000', and 1500', respectively. Gust is estimated according to the NCEP HRRR gust algorithm.