USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-22/12 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 22 12 -14.6 -16.1 29.09 1 3 267 118 001 100 99 93 -13-14-15 000 1 22 13 -14.8 -15.1 29.08 2 5 234 85 -001 113113 90 -13-14-15 000 2 22 14 -15.5 -15.7 29.08 1 4 248 99 000 115 97 81 -13-14-15 000 3 22 15 -15.9 -16.2 29.07 0 4 262 113 000 116 92 77 -13-14-15 000 4 22 16 -15.6 -16.2 29.07 0 3 323 174 001 116 90 70 -13-14-15 000 5 22 17 -14.9 -15.6 29.04 0 2 30 241 003 114 89 59 -14-14-15 000 6 22 18 -14.2 -14.9 29.05 0 2 74 285 002 109 88 53 -14-15-15 000 7 22 19 -13.7 -14.8 29.05 1 2 55 266 000 104 92 56 -14-15-16 000 8 22 20 -13.0 -14.3 29.04 0 2 18 229 -001 102 92 58 -14-15-16 000 9 22 21 -12.8 -14.2 29.05 1 2 196 47 000 100 84 56 -14-15-16 000 10 22 22 -12.7 -14.5 29.04 2 2 164 15 000 97 77 54 -14-15-16 000 11 22 23 -12.8 -15.2 29.02 3 3 137 348 000 92 67 52 -14-15-16 000 12 23 00 -13.0 -15.5 29.03 5 5 115 326 000 92 56 47 -14-15-16 000 13 23 01 -13.7 -17.5 29.04 6 6 104 315 000 80 54 45 -14-15-16 000 14 23 02 -14.2 -17.5 29.04 6 7 106 317 000 85 55 44 -14-15-16 000 15 23 03 -14.8 -17.9 29.04 7 9 111 322 000 86 53 46 -14-15-16 000 16 23 04 -15.4 -18.6 29.04 7 10 114 325 000 85 49 49 -15-15-16 000 17 23 05 -16.2 -19.1 29.04 6 10 119 330 001 88 50 54 -15-15-16 000 18 23 06 -17.1 -19.8 29.04 5 9 126 337 000 91 51 58 -15-15-16 000 19 23 07 -17.9 -20.2 29.03 6 10 130 341 000 96 51 61 -15-15-16 000 20 23 08 -18.6 -20.5 29.03 6 11 131 342 -001 102 52 62 -15-15-16 000 21 23 09 -19.2 -20.7 29.03 6 11 134 345 -002 108 53 61 -15-16-16 000 22 23 10 -19.6 -20.6 29.03 6 11 137 348 -002 116 53 55 -15-16-16 000 23 23 11 -19.8 -20.5 29.02 6 11 144 355 -002 120 53 49 -16-16-16 000 24 23 12 -19.9 -20.6 29.01 6 11 154 5 -002 120 56 48 -16-16-16 000 25 23 13 -19.8 -20.4 29.02 5 12 165 16 -002 120 54 48 -16-16-16 000 26 23 14 -19.5 -20.1 29.01 5 11 174 25 -002 120 55 48 -16-16-16 000 27 23 15 -19.0 -19.5 29.01 5 11 175 26 -003 120 56 48 -16-16-16 000 28 23 16 -18.4 -18.9 29.00 5 9 175 26 -002 118 56 49 -16-16-17 000 29 23 17 -17.6 -18.5 29.00 5 9 171 22 -002 110 58 51 -16-16-17 000 30 23 18 -16.8 -18.6 29.00 5 10 165 16 -001 100 60 53 -16-16-17 000 31 23 19 -16.2 -18.7 29.00 6 9 163 14 000 93 59 56 -16-16-17 000 32 23 20 -15.7 -18.9 29.00 6 9 161 12 000 87 57 59 -16-16-17 000 33 23 21 -15.5 -18.7 28.99 6 9 163 14 001 86 56 52 -16-16-17 000 34 23 22 -15.4 -18.5 28.99 7 9 161 12 001 87 58 47 -16-16-17 000 35 23 23 -15.3 -18.3 28.99 7 10 160 11 001 88 63 53 -16-16-17 000 36 24 00 -15.3 -18.2 28.99 7 10 159 10 000 89 77 59 -16-16-17 000 37 24 01 -15.4 -18.1 28.99 8 11 158 9 000 91 80 61 -16-16-17 000 38 24 02 -15.6 -18.2 28.99 8 12 160 11 000 91 82 58 -16-16-16 000 39 24 03 -15.8 -18.5 28.98 8 13 159 10 000 91 71 45 -16-16-16 000 40 24 04 -16.2 -18.6 28.98 8 12 159 10 000 95 49 35 -15-15-15 000 41 24 05 -16.7 -18.6 28.97 7 10 159 10 000 100 77 46 -14-14-15 000 42 24 06 -17.4 -18.7 28.97 6 9 160 11 001 108 64 58 -14-14-14 000 43 24 07 -18.0 -18.9 28.96 6 10 161 12 000 114 44 52 -13-13-13 000 44 24 08 -18.6 -19.2 28.95 6 11 160 11 000 119 30 46 -13-12-13 000 45 24 09 -18.6 -19.2 28.95 6 12 153 4 001 119 64 57 -12-12-13 000 46 24 10 -18.2 -18.8 28.95 6 12 146 357 000 118 72 56 -12-12-13 000 47 24 11 -18.0 -18.7 28.95 6 11 140 351 000 118 70 57 -11-12-13 000 48 24 12 -17.7 -18.4 28.95 5 11 134 345 -001 116 74 41 -11-12-13 000 49 24 13 -17.6 -18.3 28.96 6 11 96 307 000 117 99 35 -13-13-13 000 50 24 14 -16.8 -17.3 28.97 6 12 73 284 000 117 87 34 -13-13-13 000 51 24 15 -16.1 -17.0 28.98 6 9 64 275 000 110 72 35 -12-12-12 000 52 24 16 -14.8 -16.6 28.99 6 11 68 279 -001 99 72 37 -11-12-12 000 53 24 17 -14.2 -15.6 29.00 8 13 68 279 -001 102 52 47 -12-12-12 000 54 24 18 -13.7 -15.6 29.00 9 12 65 276 -003 96 47 37 -12-12-12 000 55 24 19 -13.3 -15.9 29.01 8 11 66 277 -001 90 44 32 -11-11-11 000 56 24 20 -12.7 -16.5 29.02 8 12 67 278 -001 79 36 20 -11-11-11 000 57 24 21 -12.0 -15.9 29.03 8 12 68 279 -001 78 41 40 -10-10-10 000 58 24 22 -11.2 -15.1 29.04 7 12 79 290 000 77 37 40 -9-10 -9 000 59 24 23 -10.7 -14.2 29.05 7 11 97 308 000 80 30 35 -9 -9 -9 000 60 25 00 -10.3 -13.6 29.04 8 11 108 319 000 81 26 38 -8 -8 -8 000 61 25 01 -10.3 -13.5 29.04 7 11 109 320 001 81 34 43 -8 -8 -8 000 62 25 02 -10.5 -13.6 29.05 7 13 108 319 000 82 37 38 -8 -7 -8 000 63 25 03 -10.6 -13.0 29.05 7 14 117 328 001 89 39 37 -8 -7 -8 000 64 25 04 -10.8 -12.6 29.05 8 14 118 329 001 95 34 42 -8 -7 -8 000 65 25 05 -11.4 -12.3 29.04 7 14 124 335 000 104 35 43 -8 -7 -8 000 66 25 06 -12.1 -12.5 29.05 7 13 132 343 001 112 37 40 -8 -7 -8 000 67 25 07 -13.0 -13.4 29.05 6 12 136 347 001 113 37 39 -8 -8 -8 000 68 25 08 -13.8 -14.2 29.05 6 13 131 342 003 114 37 38 -9 -8 -8 000 69 25 09 -13.9 -14.3 29.05 6 13 123 334 001 113 36 37 -8 -8 -8 000 70 25 10 -13.7 -14.1 29.05 7 13 111 322 000 113 35 36 -8 -7 -8 000 71 25 11 -13.3 -14.0 29.05 8 13 99 310 000 108 34 34 -7 -7 -8 000 72 25 12 -12.9 -15.3 29.05 8 12 87 298 000 88 31 32 -6 -7 -8 000 73 25 13 -12.6 -15.5 29.05 7 11 81 292 001 82 31 32 -6 -7 -8 000 74 25 14 -12.2 -15.8 29.06 7 10 78 289 000 74 29 31 -6 -7 -8 000 75 25 15 -11.6 -15.7 29.05 6 8 80 291 001 70 30 32 -6 -7 -8 000 76 25 16 -11.0 -15.1 29.05 6 7 87 298 002 69 31 31 -6 -7 -8 000 77 25 17 -10.2 -14.3 29.05 5 6 92 303 002 69 31 30 -6 -7 -8 000 78 25 18 -9.4 -13.5 29.05 4 5 100 311 001 68 29 30 -6 -6 -7 000 79 25 19 -8.6 -12.7 29.05 3 6 118 329 000 66 28 29 -6 -7 -7 000 80 25 20 -7.9 -12.0 29.05 3 6 134 345 000 66 33 26 -6 -7 -7 000 81 25 21 -7.4 -11.8 29.05 2 6 152 3 000 67 37 24 -6 -7 -7 000 82 25 22 -7.0 -11.4 29.05 2 6 164 15 000 69 39 29 -7 -7 -7 000 83 25 23 -6.9 -11.0 29.05 3 6 163 14 000 72 40 37 -7 -7 -7 000 84 26 00 -7.0 -10.8 29.05 3 4 159 10 000 74 39 37 -6 -7 -7 000 85 26 01 -7.2 -10.3 29.04 2 3 154 5 000 79 39 36 -6 -7 -7 000 86 26 02 -7.4 -9.9 29.04 2 2 142 353 000 82 37 35 -6 -7 -7 000 87 26 03 -7.7 -10.7 29.04 1 2 137 348 000 83 37 35 -6 -7 -7 000 88 26 04 -8.1 -11.1 29.03 1 1 131 342 000 84 38 37 -6 -7 -7 000 89 26 05 -8.7 -11.8 29.03 2 4 117 328 000 83 40 36 -7 -7 -7 000 90 26 06 -9.2 -13.3 29.02 2 5 110 321 000 76 36 35 -7 -7 -7 000 91 26 07 -10.4 -14.5 29.02 4 5 91 302 000 75 32 29 -7 -6 -7 000 92 26 08 -11.9 -15.4 29.02 5 7 75 286 000 77 32 31 -6 -6 -7 000 93 26 09 -12.4 -15.4 29.02 7 9 63 274 -001 81 31 30 -6 -6 -6 000 94 26 10 -12.5 -14.7 29.02 7 10 57 268 000 89 39 28 -6 -6 -7 000 95 26 11 -12.5 -14.5 29.02 7 9 55 266 000 92 35 27 -6 -6 -7 000 96 26 12 -12.3 -14.1 29.02 7 8 52 263 000 94 34 27 -5 -6 -7 000 97 26 13 -12.3 -14.1 29.02 7 9 50 261 000 94 33 27 -6 -6 -7 000 98 26 14 -11.9 -13.9 29.01 7 9 50 261 000 93 35 28 -6 -6 -7 000 99 26 15 -11.4 -13.4 29.01 7 9 47 258 000 92 36 29 -6 -6 -7 000 100 26 16 -10.8 -13.1 29.01 7 10 45 256 000 89 39 29 -5 -6 -7 000 101 26 17 -10.3 -13.0 29.02 7 10 40 251 000 85 42 30 -5 -6 -7 000 102 26 18 -9.9 -12.6 29.02 6 9 35 246 001 85 42 33 -5 -6 -7 000 103 26 19 -9.3 -12.2 29.02 6 9 35 246 001 84 42 33 -5 -6 -7 000 104 26 20 -8.6 -11.6 29.03 6 9 39 250 001 82 29 33 -5 -6 -7 000 105 26 21 -7.9 -11.5 29.04 6 8 40 251 000 76 33 32 -5 -6 -7 000 106 26 22 -7.5 -11.6 29.05 6 9 41 253 001 72 35 32 -5 -6 -7 000 107 26 23 -7.2 -11.3 29.05 5 7 43 254 002 72 32 35 -5 -6 -7 000 108 27 00 -7.0 -10.8 29.06 5 7 43 254 003 74 31 35 -5 -6 -7 000 109 27 01 -7.0 -10.4 29.06 5 7 44 255 004 76 29 32 -5 -6 -7 000 110 27 02 -7.1 -10.8 29.05 4 6 48 259 006 71 30 30 -5 -6 -7 000 111 27 03 -7.5 -11.4 29.05 4 5 66 277 004 68 31 30 -5 -6 -7 000 112 27 04 -8.3 -12.3 29.05 4 4 94 305 000 68 31 31 -5 -6 -7 000 113 27 05 -9.0 -13.6 29.06 5 5 99 310 000 64 31 31 -5 -6 -7 000 114 27 06 -9.6 -15.2 29.06 6 7 94 305 000 56 28 30 -5 -6 -6 000 115 27 07 -10.2 -16.3 29.06 7 8 87 298 000 52 27 31 -5 -6 -6 000 116 27 08 -10.7 -17.0 29.05 7 9 78 289 001 51 27 32 -5 -6 -6 000 117 27 09 -10.8 -17.7 29.05 7 8 70 281 001 48 27 33 -5 -5 -6 000 118 27 10 -10.7 -18.0 29.05 7 7 66 277 001 46 28 33 -5 -5 -6 000 119 27 11 -10.2 -18.2 29.05 6 6 64 275 001 45 31 35 -5 -5 -6 000 120 27 12 -9.4 -18.2 29.05 5 5 68 279 000 45 30 33 -4 -5 -6 000 * 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.