USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-23/00 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 23 00 -14.9 -18.1 29.05 5 7 116 327 000 76 61 46 -15-16-16 000 1 23 01 -15.2 -18.5 29.05 7 9 118 329 000 85 61 46 -16-15-16 000 2 23 02 -15.4 -18.6 29.05 8 11 123 335 000 87 56 49 -16-15-16 000 3 23 03 -15.8 -18.9 29.05 8 13 126 337 000 88 53 52 -16-15-16 000 4 23 04 -16.3 -19.1 29.05 8 12 132 343 000 90 54 54 -16-15-16 000 5 23 05 -16.9 -19.3 29.03 8 13 139 350 000 95 55 58 -16-16-16 000 6 23 06 -17.6 -19.4 29.06 7 12 145 356 -001 101 54 59 -16-16-16 000 7 23 07 -18.3 -19.4 29.05 7 12 151 2 -002 111 55 59 -16-16-16 000 8 23 08 -19.0 -19.5 29.04 7 12 159 10 -003 119 56 56 -16-16-16 000 9 23 09 -19.7 -20.2 29.03 6 13 162 13 -002 121 54 50 -16-16-16 000 10 23 10 -20.1 -20.6 29.03 6 14 164 15 -002 121 54 48 -16-16-16 000 11 23 11 -20.3 -20.8 29.02 6 14 167 18 -002 121 54 48 -16-16-16 000 12 23 12 -20.2 -20.8 29.03 6 14 168 19 -002 121 55 50 -16-16-16 000 13 23 13 -19.9 -20.5 29.02 6 13 170 21 -002 121 55 54 -16-16-16 000 14 23 14 -19.4 -20.0 29.03 7 13 175 26 -002 119 57 57 -16-16-17 000 15 23 15 -18.7 -19.9 29.03 7 13 179 30 -002 112 60 62 -16-16-17 000 16 23 16 -18.2 -19.8 29.03 7 13 180 31 -001 104 63 66 -16-16-17 000 17 23 17 -17.5 -19.8 29.02 8 14 175 26 -002 96 65 65 -16-16-17 000 18 23 18 -17.0 -19.5 29.01 8 12 174 25 -003 95 65 62 -16-16-17 000 19 23 19 -16.6 -19.3 29.01 8 12 175 26 -003 93 65 63 -16-16-17 000 20 23 20 -16.3 -19.1 29.01 8 12 175 26 -001 91 64 50 -16-16-17 000 21 23 21 -16.0 -18.9 29.00 8 11 176 27 000 90 62 48 -16-16-17 000 22 23 22 -15.9 -18.7 29.00 8 11 175 26 001 90 61 54 -16-16-17 000 23 23 23 -15.8 -18.5 29.00 8 11 174 25 001 91 62 53 -16-16-17 000 24 24 00 -15.7 -18.4 28.99 8 11 172 23 000 92 69 55 -16-16-17 000 25 24 01 -15.7 -18.3 28.99 9 12 171 22 000 92 78 54 -16-16-17 000 26 24 02 -15.8 -18.3 28.99 9 13 168 19 001 93 76 44 -16-16-16 000 27 24 03 -16.0 -18.4 28.99 9 14 162 13 000 94 73 49 -16-15-15 000 28 24 04 -16.3 -18.6 28.98 9 14 160 11 000 96 82 70 -15-14-15 000 29 24 05 -16.8 -18.6 28.98 8 14 164 15 000 102 52 59 -14-13-14 000 30 24 06 -17.4 -18.3 28.97 8 12 165 16 000 112 38 48 -14-13-13 000 31 24 07 -18.0 -18.5 28.97 6 10 172 23 000 118 31 38 -13-12-13 000 32 24 08 -18.6 -19.1 28.96 5 13 175 26 000 119 34 60 -13-13-13 000 33 24 09 -18.2 -18.8 28.96 6 12 174 25 000 118 82 70 -13-12-13 000 34 24 10 -18.0 -18.7 28.95 5 11 173 24 001 118 76 48 -12-12-13 000 35 24 11 -17.7 -18.3 28.96 4 9 157 8 000 117 79 44 -12-12-13 000 36 24 12 -16.5 -17.5 28.97 4 8 109 320 000 108 89 34 -12-13-13 000 37 24 13 -16.5 -17.6 28.98 7 10 64 275 000 109 87 34 -13-13-13 000 38 24 14 -15.9 -16.4 28.99 8 11 34 245 001 116 66 38 -13-12-13 000 39 24 15 -16.2 -16.5 29.00 7 11 30 241 000 116 66 36 -12-12-13 000 40 24 16 -15.2 -15.5 29.01 8 9 31 242 000 116 65 37 -11-12-13 000 41 24 17 -15.0 -15.3 29.02 6 8 37 248 000 115 53 31 -12-12-12 000 42 24 18 -14.2 -14.9 29.03 4 7 52 263 000 109 46 29 -12-12-12 000 43 24 19 -13.0 -14.5 29.04 3 6 69 280 000 100 43 34 -11-11-12 000 44 24 20 -12.2 -14.0 29.05 4 6 88 299 001 96 34 28 -11-12-12 000 45 24 21 -11.8 -14.4 29.05 5 8 98 309 002 88 43 25 -11-11-12 000 46 24 22 -11.6 -16.0 29.06 5 9 104 315 001 74 50 33 -11-11-11 000 47 24 23 -11.3 -15.1 29.06 6 11 105 316 000 78 44 42 -10-10-10 000 48 25 00 -10.9 -14.3 29.07 7 11 116 327 000 80 33 39 -9 -9 -9 000 49 25 01 -10.6 -13.7 29.07 7 11 120 331 000 83 29 51 -8 -8 -9 000 50 25 02 -10.9 -13.4 29.07 7 11 125 336 001 88 31 50 -7 -7 -8 000 51 25 03 -11.2 -13.7 29.07 7 10 119 330 000 88 35 47 -8 -7 -8 000 52 25 04 -11.6 -14.1 29.07 7 12 110 321 001 88 37 42 -8 -7 -8 000 53 25 05 -12.1 -14.1 29.08 6 12 106 317 001 94 36 39 -8 -7 -8 000 54 25 06 -12.5 -13.7 29.08 6 13 113 324 001 103 34 44 -8 -7 -8 000 55 25 07 -12.9 -13.3 29.08 7 14 114 325 001 112 32 42 -8 -8 -8 000 56 25 08 -13.4 -13.9 29.08 7 14 110 321 000 113 34 40 -8 -8 -9 000 57 25 09 -13.8 -14.3 29.08 7 14 110 321 000 113 35 39 -8 -8 -9 000 58 25 10 -13.8 -14.6 29.08 7 14 111 322 000 109 37 41 -8 -8 -9 000 59 25 11 -13.5 -14.8 29.09 7 14 113 324 000 101 40 42 -8 -8 -9 000 60 25 12 -13.2 -14.8 29.08 7 14 116 327 000 97 42 41 -8 -8 -9 000 61 25 13 -12.8 -14.8 29.08 7 13 120 331 000 93 43 41 -8 -8 -9 000 62 25 14 -12.6 -14.7 29.09 6 13 125 336 001 91 45 41 -8 -8 -9 000 63 25 15 -12.3 -14.4 29.09 5 12 138 349 001 91 46 41 -8 -8 -9 000 64 25 16 -11.8 -14.0 29.09 5 11 148 359 001 90 46 41 -8 -8 -9 000 65 25 17 -11.2 -13.5 29.08 5 10 157 8 000 88 46 40 -8 -8 -8 000 66 25 18 -10.6 -13.1 29.08 4 9 169 20 000 88 46 40 -8 -8 -8 000 67 25 19 -10.0 -12.6 29.08 4 8 178 29 000 87 45 40 -7 -8 -8 000 68 25 20 -9.2 -12.2 29.08 4 8 179 30 000 83 44 39 -7 -8 -8 000 69 25 21 -8.7 -12.1 29.08 5 10 179 30 000 79 43 39 -7 -8 -8 000 70 25 22 -8.4 -12.0 29.08 6 12 185 36 000 77 42 39 -7 -8 -8 000 71 25 23 -8.3 -12.1 29.08 6 11 184 35 000 75 42 38 -7 -8 -8 000 72 26 00 -8.4 -12.0 29.09 6 10 186 37 000 78 42 38 -7 -7 -8 000 73 26 01 -8.6 -11.8 29.09 5 8 189 40 000 80 42 38 -7 -7 -8 000 74 26 02 -8.9 -11.7 29.09 5 6 195 46 000 84 42 37 -7 -7 -8 000 75 26 03 -9.4 -11.6 29.08 4 5 203 54 000 88 41 37 -7 -7 -8 000 76 26 04 -10.1 -11.9 29.08 4 6 205 56 001 93 41 36 -7 -7 -8 000 77 26 05 -11.2 -12.4 29.07 4 6 203 54 000 100 39 36 -7 -7 -8 000 78 26 06 -12.1 -12.9 29.08 4 6 199 50 000 106 39 35 -7 -7 -8 000 79 26 07 -12.7 -13.5 29.08 3 6 193 44 000 106 39 35 -7 -7 -8 000 80 26 08 -12.8 -13.9 29.08 3 6 181 32 000 103 39 35 -7 -7 -8 000 81 26 09 -13.2 -14.6 29.08 2 5 158 9 000 100 39 35 -8 -7 -8 000 82 26 10 -13.3 -14.5 29.08 2 5 125 336 000 102 39 36 -8 -7 -8 000 83 26 11 -13.1 -14.1 29.08 2 4 102 313 000 104 39 36 -8 -8 -8 000 84 26 12 -12.8 -13.9 29.08 2 3 85 296 001 102 39 36 -8 -8 -8 000 85 26 13 -12.6 -13.9 29.07 1 2 62 273 001 100 41 35 -9 -8 -9 000 86 26 14 -12.6 -13.9 29.07 2 2 28 239 000 101 41 33 -9 -8 -9 000 87 26 15 -12.6 -13.9 29.07 3 4 359 210 000 101 40 33 -9 -8 -9 000 88 26 16 -12.3 -14.4 29.06 3 3 353 204 000 93 40 33 -9 -8 -9 000 89 26 17 -12.0 -14.2 29.06 3 5 329 180 001 90 42 33 -9 -8 -9 000 90 26 18 -11.3 -13.9 29.07 3 4 305 156 001 87 43 34 -9 -8 -9 000 91 26 19 -10.8 -13.3 29.06 2 4 283 134 000 89 43 34 -9 -8 -9 000 92 26 20 -10.1 -12.8 29.06 2 3 244 95 000 87 43 35 -9 -8 -9 000 93 26 21 -9.8 -12.5 29.07 2 2 213 64 000 88 45 34 -9 -8 -9 000 94 26 22 -9.6 -12.3 29.07 1 1 195 46 000 87 46 34 -9 -9 -9 000 95 26 23 -9.3 -12.1 29.07 0 0 173 24 000 87 46 33 -9 -9 -9 000 96 27 00 -9.2 -11.7 29.07 1 1 159 10 000 88 47 33 -10 -9 -9 000 97 27 01 -9.2 -11.3 29.07 2 2 146 357 001 91 47 33 -10 -9 -9 000 98 27 02 -9.3 -11.1 29.07 3 3 134 345 000 94 45 34 -10 -8 -9 000 99 27 03 -9.7 -11.1 29.07 3 4 126 337 000 97 44 33 -9 -8 -9 000 100 27 04 -10.3 -11.3 29.06 4 5 122 333 000 103 42 32 -9 -8 -9 000 101 27 05 -11.1 -11.6 29.06 4 6 120 331 000 110 41 31 -8 -8 -9 000 102 27 06 -11.9 -12.3 29.06 4 7 107 318 000 112 39 30 -8 -8 -8 000 103 27 07 -12.9 -13.2 29.06 4 8 99 310 000 113 37 29 -8 -8 -8 000 104 27 08 -14.5 -14.8 29.06 4 8 109 320 000 115 34 28 -7 -7 -8 000 105 27 09 -15.4 -15.8 29.06 5 9 115 326 000 115 31 27 -7 -7 -8 000 106 27 10 -15.5 -15.9 29.06 6 10 118 329 000 116 29 28 -7 -7 -8 000 107 27 11 -15.3 -15.6 29.07 6 9 115 326 001 115 28 29 -6 -7 -7 000 108 27 12 -15.1 -15.6 29.07 6 10 109 320 000 115 26 28 -6 -7 -7 000 109 27 13 -14.4 -16.1 29.07 6 11 106 317 000 99 28 24 -6 -6 -7 000 110 27 14 -13.3 -15.9 29.07 7 14 107 318 000 89 30 30 -6 -7 -7 000 111 27 15 -12.5 -15.5 29.07 7 14 114 325 000 84 30 34 -6 -6 -7 000 112 27 16 -12.0 -13.4 29.06 7 14 119 330 001 99 39 41 -6 -6 -7 000 113 27 17 -11.6 -12.6 29.07 7 12 121 332 000 103 35 35 -6 -6 -7 000 114 27 18 -10.8 -12.4 29.07 8 14 118 329 000 97 36 32 -6 -6 -7 000 115 27 19 -10.2 -11.6 29.08 9 14 124 335 000 98 38 35 -6 -6 -7 000 116 27 20 -9.3 -11.0 29.08 9 16 126 337 000 95 42 40 -6 -6 -7 000 117 27 21 -8.9 -10.9 29.09 10 15 123 334 001 91 43 39 -5 -6 -7 000 118 27 22 -8.8 -10.5 29.09 9 14 120 331 001 93 36 38 -6 -6 -7 000 119 27 23 -8.3 -10.5 29.10 9 13 122 333 001 88 37 40 -6 -6 -7 000 120 28 00 -8.2 -10.8 29.11 8 13 121 332 000 86 39 40 -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.