USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-23/12 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 23 12 -19.5 -22.2 29.03 7 13 163 14 001 79 58 51 -16-16-17 000 1 23 13 -20.5 -21.7 29.04 7 11 166 17 000 113 59 53 -16-16-17 000 2 23 14 -20.4 -21.4 29.04 7 13 174 25 -001 115 61 55 -16-17-17 000 3 23 15 -19.9 -21.0 29.03 7 13 177 28 -002 114 63 57 -16-17-17 000 4 23 16 -19.5 -21.0 29.04 7 13 183 34 -002 108 65 58 -17-17-17 000 5 23 17 -19.0 -20.9 29.02 7 14 179 30 -001 102 65 53 -17-17-17 000 6 23 18 -18.3 -20.7 29.02 7 13 175 26 -002 97 65 50 -17-17-17 000 7 23 19 -17.8 -20.4 29.02 7 11 174 25 -001 95 64 54 -17-17-17 000 8 23 20 -17.3 -20.1 29.02 7 11 176 27 001 92 66 62 -16-17-17 000 9 23 21 -17.0 -19.9 29.00 7 10 174 25 000 91 70 65 -16-17-17 000 10 23 22 -16.7 -19.7 29.00 8 11 171 22 000 90 74 65 -16-17-17 000 11 23 23 -16.7 -19.5 28.98 8 12 164 15 000 91 79 62 -16-17-17 000 12 24 00 -16.6 -19.3 28.99 9 13 156 7 000 92 78 52 -16-16-17 000 13 24 01 -16.7 -19.2 28.99 9 14 151 2 000 94 67 45 -16-15-16 000 14 24 02 -16.8 -19.2 28.99 9 14 145 356 000 95 90 69 -15-14-15 000 15 24 03 -16.9 -19.1 29.00 9 14 147 358 000 97 67 69 -14-14-14 000 16 24 04 -17.3 -19.4 28.99 9 14 148 359 000 99 47 59 -14-13-14 000 17 24 05 -17.8 -19.5 28.98 8 14 150 1 001 104 37 49 -14-13-14 000 18 24 06 -18.4 -19.4 28.96 8 16 159 10 000 112 35 37 -14-13-14 000 19 24 07 -18.7 -19.2 28.96 8 16 162 13 000 119 33 61 -14-14-14 000 20 24 08 -18.8 -19.3 28.96 7 15 159 10 000 119 47 43 -14-13-14 000 21 24 09 -19.0 -19.6 28.96 6 13 149 0 000 119 61 55 -13-13-14 000 22 24 10 -19.0 -19.7 28.96 5 11 137 348 000 119 66 48 -12-13-14 000 23 24 11 -18.4 -19.0 28.96 6 11 125 336 000 118 76 43 -12-13-14 000 24 24 12 -18.1 -18.7 28.95 7 11 105 316 002 117 56 45 -12-13-14 000 25 24 13 -17.3 -18.2 28.96 7 11 87 298 001 112 73 44 -13-14-15 000 26 24 14 -17.0 -17.7 28.97 8 14 76 287 000 115 44 42 -14-14-14 000 27 24 15 -17.0 -17.7 28.98 8 15 68 279 000 114 71 41 -14-14-14 000 28 24 16 -16.8 -17.4 28.99 10 16 63 274 000 114 45 37 -14-14-14 000 29 24 17 -16.6 -17.3 28.99 11 15 54 265 000 113 48 34 -15-14-13 000 30 24 18 -16.9 -17.3 29.01 10 14 46 257 000 117 46 31 -15-14-13 000 31 24 19 -16.6 -16.9 29.03 9 12 41 252 000 117 42 28 -15-14-13 000 32 24 20 -16.2 -16.4 29.04 8 10 39 250 000 117 40 29 -14-13-13 000 33 24 21 -15.6 -16.2 29.04 6 8 41 252 001 112 38 29 -14-13-13 000 34 24 22 -15.0 -16.2 29.05 4 5 52 263 002 104 35 26 -13-12-12 000 35 24 23 -14.3 -16.2 29.06 3 4 81 292 003 97 34 24 -13-12-12 000 36 25 00 -13.6 -16.5 29.06 4 5 107 318 003 88 33 24 -13-12-12 000 37 25 01 -13.4 -17.3 29.07 5 7 116 327 001 79 30 24 -12-11-11 000 38 25 02 -13.3 -16.9 29.07 5 8 115 326 000 80 24 33 -11-11-10 000 39 25 03 -13.3 -16.8 29.07 5 8 108 319 000 81 21 39 -10-10-10 000 40 25 04 -13.5 -17.3 29.07 6 11 99 310 000 76 21 39 -9 -9-10 000 41 25 05 -13.6 -17.9 29.08 6 11 89 300 001 69 21 40 -9 -9 -9 000 42 25 06 -14.5 -18.3 29.08 4 9 114 325 001 77 22 40 -9 -9 -9 000 43 25 07 -15.3 -18.6 29.08 5 11 114 325 000 82 25 40 -8 -8 -9 000 44 25 08 -14.8 -18.5 29.08 7 9 107 318 000 77 26 39 -8 -8 -9 000 45 25 09 -14.8 -17.2 29.08 7 9 109 320 000 89 39 37 -7 -8 -9 000 46 25 10 -14.8 -16.0 29.08 7 10 114 325 000 104 36 41 -7 -8 -8 000 47 25 11 -14.7 -15.2 29.09 6 10 123 334 000 111 35 38 -8 -8 -8 000 48 25 12 -14.9 -15.5 29.09 6 10 126 337 001 114 34 36 -8 -8 -8 000 49 25 13 -14.7 -15.2 29.10 6 10 124 335 001 113 35 35 -7 -8 -8 000 50 25 14 -14.2 -14.9 29.10 5 9 120 331 001 111 36 34 -7 -8 -9 000 51 25 15 -13.3 -14.5 29.11 5 8 116 327 000 102 37 35 -7 -8 -9 000 52 25 16 -12.4 -14.3 29.11 4 7 121 332 000 95 37 45 -8 -8 -9 000 53 25 17 -11.8 -14.0 29.10 4 7 143 354 000 90 38 43 -8 -8 -9 000 54 25 18 -11.2 -13.4 29.10 4 8 159 10 001 90 37 42 -8 -9 -9 000 55 25 19 -10.7 -12.9 29.10 4 8 166 17 001 91 43 46 -8 -9 -9 000 56 25 20 -10.0 -12.3 29.10 4 8 173 24 001 90 47 45 -8 -9 -9 000 57 25 21 -9.4 -12.2 29.11 5 9 177 28 000 85 48 44 -8 -9 -9 000 58 25 22 -9.2 -12.2 29.11 5 10 180 31 000 82 49 43 -8 -9 -9 000 59 25 23 -9.0 -12.3 29.11 5 9 183 34 001 80 50 42 -8 -9 -9 000 60 26 00 -8.9 -12.3 29.11 5 8 184 35 000 80 50 41 -8 -9 -9 000 61 26 01 -9.2 -12.1 29.11 5 8 190 41 000 83 49 41 -8 -9 -9 000 62 26 02 -9.6 -11.8 29.11 5 6 198 49 000 90 47 40 -8 -8 -9 000 63 26 03 -10.1 -12.1 29.10 5 6 206 57 000 92 45 39 -8 -8 -9 000 64 26 04 -10.9 -12.6 29.10 5 7 210 61 000 95 44 39 -8 -8 -9 000 65 26 05 -11.8 -13.1 29.09 5 7 210 61 000 100 44 39 -8 -8 -9 000 66 26 06 -12.9 -13.8 29.09 5 8 206 57 000 107 43 40 -8 -8 -9 000 67 26 07 -13.8 -14.4 29.09 4 7 201 53 000 110 42 41 -8 -8 -8 000 68 26 08 -13.9 -15.0 29.09 3 6 186 37 000 104 41 41 -8 -8 -8 000 69 26 09 -13.8 -15.7 29.09 3 6 159 10 000 96 40 38 -8 -8 -8 000 70 26 10 -13.9 -15.7 29.09 3 6 136 347 000 98 40 33 -8 -8 -9 000 71 26 11 -14.0 -15.1 29.09 3 6 125 336 000 104 42 33 -8 -8 -9 000 72 26 12 -14.2 -15.0 29.09 4 6 109 320 000 107 44 33 -8 -8 -9 000 73 26 13 -14.3 -15.2 29.09 4 5 82 293 000 106 45 31 -9 -8 -9 000 74 26 14 -13.6 -16.0 29.09 3 4 32 243 000 92 41 32 -9 -8 -8 000 75 26 15 -12.7 -16.5 29.09 3 4 0 211 000 81 41 33 -9 -8 -8 000 76 26 16 -13.3 -16.2 29.08 4 5 356 207 000 84 39 32 -8 -8 -8 000 77 26 17 -13.0 -15.6 29.09 4 5 353 204 000 87 38 32 -8 -8 -9 000 78 26 18 -12.4 -15.0 29.09 4 4 351 202 000 89 38 31 -8 -8 -9 000 79 26 19 -11.9 -14.1 29.10 3 4 351 202 000 92 38 31 -9 -8 -9 000 80 26 20 -11.6 -13.5 29.10 4 4 348 199 000 95 41 30 -9 -8 -9 000 81 26 21 -11.6 -12.7 29.11 4 4 339 190 000 101 42 30 -9 -8 -9 000 82 26 22 -11.7 -12.2 29.12 4 4 340 191 000 108 44 30 -9 -8 -9 000 83 26 23 -11.0 -12.6 29.13 4 4 351 202 000 97 44 30 -9 -9 -9 000 84 27 00 -11.1 -13.5 29.14 3 4 355 206 000 90 44 30 -9 -9 -9 000 85 27 01 -11.5 -13.6 29.14 4 4 3 214 000 93 43 30 -9 -9 -9 000 86 27 02 -12.3 -12.9 29.15 4 4 7 218 000 108 43 30 -9 -9 -9 000 87 27 03 -12.9 -13.0 29.15 4 5 13 224 000 113 42 30 -9 -9 -9 000 88 27 04 -12.7 -12.9 29.15 5 5 12 223 001 113 41 31 -8 -8 -9 000 89 27 05 -13.3 -13.5 29.15 5 5 15 226 001 113 40 31 -8 -8 -9 000 90 27 06 -13.8 -14.0 29.15 6 6 15 227 000 114 39 30 -8 -8 -9 000 91 27 07 -14.2 -14.5 29.16 7 7 16 227 000 114 40 30 -8 -8 -9 000 92 27 08 -14.6 -14.9 29.17 7 7 14 225 000 115 39 28 -8 -8 -9 000 93 27 09 -15.4 -15.7 29.18 6 7 15 226 000 116 38 27 -8 -8 -9 000 94 27 10 -16.0 -16.4 29.19 6 7 15 226 000 116 38 26 -8 -8 -9 000 95 27 11 -16.2 -16.7 29.19 6 6 16 227 000 116 37 25 -8 -8 -9 000 96 27 12 -15.7 -17.2 29.19 5 6 11 222 001 102 37 25 -8 -8 -9 000 97 27 13 -14.7 -17.0 29.19 5 5 9 220 001 92 37 25 -8 -8 -9 000 98 27 14 -12.7 -16.7 29.19 4 4 357 208 000 77 37 25 -8 -8 -9 000 99 27 15 -11.3 -17.2 29.20 3 3 344 195 000 65 35 25 -8 -8 -8 000 100 27 16 -10.9 -17.3 29.20 2 2 340 191 000 62 34 24 -8 -8 -8 000 101 27 17 -10.5 -17.1 29.21 0 4 46 257 000 60 33 23 -8 -8 -8 000 102 27 18 -9.7 -16.8 29.21 2 4 107 318 000 57 33 22 -8 -8 -8 000 103 27 19 -9.4 -15.0 29.22 3 4 109 320 000 56 32 22 -7 -8 -8 000 104 27 20 -8.8 -13.7 29.22 3 5 116 327 000 58 32 21 -7 -8 -8 000 105 27 21 -8.4 -12.9 29.23 3 5 117 328 000 67 32 21 -7 -8 -8 000 106 27 22 -8.2 -12.1 29.23 3 5 126 337 001 75 31 20 -7 -7 -8 000 107 27 23 -8.1 -12.1 29.23 4 6 125 336 000 74 31 19 -7 -7 -8 000 108 28 00 -8.2 -12.0 29.24 4 5 124 335 000 75 31 20 -7 -7 -8 000 109 28 01 -8.3 -11.8 29.24 3 7 134 345 000 77 29 23 -7 -7 -7 000 110 28 02 -8.6 -11.6 29.23 3 6 145 356 000 80 27 26 -7 -7 -7 000 111 28 03 -9.3 -11.9 29.23 4 6 151 2 000 83 25 28 -6 -6 -7 000 112 28 04 -10.2 -12.6 29.22 4 6 147 358 000 86 31 30 -6 -6 -7 000 113 28 05 -11.3 -12.6 29.22 5 8 136 347 000 101 37 33 -6 -6 -7 000 114 28 06 -13.0 -13.2 29.22 6 8 127 338 000 113 42 38 -6 -6 -7 000 115 28 07 -12.8 -13.1 29.22 6 8 116 327 000 113 41 38 -6 -6 -7 000 116 28 08 -13.5 -13.9 29.22 5 10 110 321 000 113 35 37 -6 -6 -7 000 117 28 09 -13.8 -14.3 29.22 6 13 103 314 000 113 29 38 -6 -6 -7 000 118 28 10 -14.0 -14.5 29.22 6 14 101 312 000 113 30 40 -6 -6 -7 000 119 28 11 -13.7 -14.2 29.22 7 14 104 315 000 113 38 38 -6 -6 -7 000 120 28 12 -13.2 -13.7 29.22 7 14 105 316 000 113 33 38 -6 -6 -7 000 * 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.