USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-22/00 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 22 00 -11.9 -13.5 29.14 7 8 239 90 001 97 95 89 -13-14-14 000 1 22 01 -12.0 -12.7 29.13 8 12 238 89 000 106114 92 -13-14-14 000 2 22 02 -11.4 -12.4 29.14 8 12 240 91 000 103114100 -13-14-14 000 3 22 03 -11.9 -13.1 29.14 7 10 244 95 000 101108100 -13-14-14 000 4 22 04 -12.0 -12.7 29.13 6 9 240 91 000 107111102 -13-14-14 000 5 22 05 -11.8 -12.1 29.13 6 9 239 90 -001 110114101 -13-14-14 000 6 22 06 -11.4 -12.1 29.13 6 9 239 90 -001 107114102 -13-14-14 000 7 22 07 -11.6 -12.0 29.12 6 8 246 97 -001 109115105 -13-14-14 000 8 22 08 -11.9 -12.0 29.12 6 7 252 103 -001 112115107 -13-14-14 000 9 22 09 -11.9 -12.1 29.10 5 8 250 101 -001 110115107 -13-14-14 000 10 22 10 -11.9 -12.4 29.10 5 7 241 92 000 109115107 -13-14-14 001 11 22 11 -11.6 -12.5 29.10 4 7 228 79 000 104115106 -13-14-14 001 12 22 12 -11.4 -12.5 29.10 4 6 217 68 000 102114108 -13-14-14 001 13 22 13 -11.5 -12.6 29.08 4 6 219 70 000 102115109 -13-14-14 001 14 22 14 -11.4 -12.5 29.09 4 5 232 83 000 102114104 -13-14-15 001 15 22 15 -11.5 -12.9 29.09 4 5 245 96 000 99115101 -13-14-15 000 16 22 16 -11.7 -12.9 29.08 4 5 232 83 000 101115 88 -13-14-15 000 17 22 17 -11.5 -12.2 29.07 4 5 216 67 000 106115 62 -13-14-15 000 18 22 18 -11.3 -12.3 29.06 4 4 212 63 000 103114 54 -13-14-15 000 19 22 19 -11.3 -12.0 29.06 4 5 211 62 000 105114 59 -12-14-15 000 20 22 20 -11.1 -12.6 29.06 4 5 211 62 000 98114 60 -12-14-15 000 21 22 21 -10.8 -12.4 29.06 2 5 208 59 001 97114 62 -12-13-15 000 22 22 22 -10.7 -12.7 29.05 4 4 165 16 000 94108 60 -12-13-15 001 23 22 23 -11.1 -13.3 29.05 4 4 183 34 000 92106 58 -12-14-15 000 24 23 00 -11.2 -13.6 29.04 3 5 166 17 000 91104 57 -12-14-14 000 25 23 01 -11.4 -13.8 29.04 3 4 142 354 001 90 96 56 -12-14-14 000 26 23 02 -11.6 -14.3 29.04 4 4 113 324 002 88 93 55 -13-14-15 000 27 23 03 -12.8 -15.6 29.05 6 7 92 303 001 88 78 49 -13-14-15 000 28 23 04 -13.8 -16.9 29.04 7 8 90 301 001 86 51 45 -14-14-15 000 29 23 05 -14.7 -17.8 29.04 7 9 90 301 001 86 48 50 -14-14-15 000 30 23 06 -15.6 -18.2 29.03 6 10 93 304 001 91 46 54 -14-14-15 000 31 23 07 -16.4 -18.5 29.04 5 9 105 316 000 98 45 55 -14-15-15 000 32 23 08 -17.1 -19.1 29.03 6 10 116 327 000 99 48 53 -15-15-15 000 33 23 09 -17.8 -19.2 29.03 6 10 126 337 000 107 51 48 -15-15-15 000 34 23 10 -18.2 -18.9 29.02 6 10 135 346 000 118 49 49 -15-15-15 000 35 23 11 -18.5 -19.1 29.02 5 12 146 357 -001 119 46 52 -15-15-15 000 36 23 12 -18.6 -19.1 29.02 6 13 158 9 -002 119 49 54 -15-15-15 000 37 23 13 -18.5 -18.9 29.02 6 13 161 12 -001 119 50 55 -16-16-15 000 38 23 14 -18.2 -18.6 29.02 6 12 159 10 -001 119 57 55 -16-16-16 000 39 23 15 -17.7 -18.0 29.02 6 11 156 7 000 118 65 55 -16-16-16 000 40 23 16 -16.9 -18.0 29.01 6 12 157 8 -001 110 70 59 -16-16-16 000 41 23 17 -16.1 -18.1 29.01 7 13 159 10 -001 99 65 61 -15-16-16 000 42 23 18 -15.6 -17.7 29.01 8 13 161 12 -001 97 60 60 -15-16-17 000 43 23 19 -15.1 -17.3 29.01 9 13 163 14 000 95 81 60 -15-16-17 000 44 23 20 -14.9 -18.1 29.00 10 14 166 17 001 86 77 59 -16-16-17 000 45 23 21 -14.7 -18.3 29.00 10 14 168 19 002 83 57 54 -15-16-17 000 46 23 22 -14.6 -17.4 29.00 9 13 169 20 002 89 68 56 -15-16-16 000 47 23 23 -14.4 -17.0 29.00 9 12 169 20 001 91 72 54 -15-16-16 000 48 24 00 -14.4 -16.8 29.00 9 12 168 19 001 92 74 57 -15-16-16 000 49 24 01 -14.4 -16.7 29.00 9 12 166 17 001 95 76 62 -15-16-16 000 50 24 02 -14.7 -16.7 28.99 8 11 165 16 001 97 71 59 -15-15-16 000 51 24 03 -15.0 -16.7 28.99 8 12 161 12 000 100 74 53 -15-15-15 000 52 24 04 -15.3 -16.8 28.98 8 12 162 13 000 103 59 38 -14-14-15 000 53 24 05 -15.6 -16.7 28.98 8 12 163 14 000 107 70 36 -14-14-14 000 54 24 06 -16.1 -16.6 28.97 8 11 163 14 001 114 53 64 -14-13-13 000 55 24 07 -16.8 -17.2 28.97 7 12 162 13 001 117 40 51 -13-12-13 000 56 24 08 -17.5 -18.0 28.96 5 12 168 19 000 118 36 57 -12-12-12 000 57 24 09 -17.4 -18.0 28.96 6 12 165 16 000 118 77 63 -12-11-12 000 58 24 10 -17.1 -17.8 28.96 5 11 165 16 001 117 65 80 -11-10-12 000 59 24 11 -17.0 -17.6 28.96 4 11 155 6 000 117 78 74 -11-10-12 000 60 24 12 -16.1 -16.6 28.96 4 9 136 347 000 114 88 58 -11-11-12 000 61 24 13 -15.4 -16.5 28.97 4 8 103 314 000 106 90 43 -11-12-12 000 62 24 14 -15.1 -16.3 28.98 6 9 65 276 000 106 78 38 -12-11-11 000 63 24 15 -14.3 -15.0 28.99 7 9 40 251 000 112 66 42 -11-10-12 000 64 24 16 -14.1 -14.5 28.99 6 7 38 249 000 114 58 35 -10-11-12 000 65 24 17 -13.8 -14.1 29.00 4 7 50 261 000 113 59 31 -11-11-11 000 66 24 18 -12.5 -13.7 29.01 4 8 63 274 000 103 50 29 -10-11-11 000 67 24 19 -11.4 -13.2 29.02 4 7 64 275 000 95 46 28 -10-10-11 000 68 24 20 -10.8 -13.2 29.03 3 4 82 293 000 90 41 50 -10-10-10 000 69 24 21 -10.2 -12.8 29.04 4 6 126 337 001 88 40 46 -10-10-10 000 70 24 22 -9.8 -13.8 29.04 5 8 122 333 001 76 39 54 -10-10-10 000 71 24 23 -9.7 -14.1 29.04 5 8 111 322 001 72 59 26 -10-10-10 000 72 25 00 -9.6 -13.3 29.04 4 7 116 327 000 79 51 22 -10 -9 -9 000 73 25 01 -9.8 -12.8 29.04 4 7 123 334 -001 83 43 31 -10 -8 -9 000 74 25 02 -10.0 -12.6 29.05 5 7 122 333 000 87 26 36 -8 -8 -8 000 75 25 03 -10.5 -12.9 29.04 5 8 105 316 000 89 16 34 -7 -7 -8 000 76 25 04 -10.9 -13.6 29.04 6 10 94 305 001 85 16 32 -6 -7 -7 000 77 25 05 -11.3 -13.8 29.03 6 12 92 303 001 86 19 33 -6 -6 -7 000 78 25 06 -11.8 -13.2 29.04 7 13 109 320 003 99 19 31 -6 -6 -7 000 79 25 07 -11.9 -12.2 29.04 7 14 109 320 001 111 33 29 -6 -6 -7 000 80 25 08 -12.3 -12.7 29.04 7 15 105 316 001 112 29 31 -6 -6 -7 000 81 25 09 -12.4 -13.2 29.04 8 15 106 317 001 107 31 30 -6 -6 -7 000 82 25 10 -12.3 -13.6 29.04 8 14 105 316 000 101 34 30 -7 -6 -7 000 83 25 11 -12.2 -13.7 29.04 8 14 113 324 -003 97 38 38 -7 -7 -7 000 84 25 12 -12.2 -13.6 29.04 7 14 122 333 000 99 44 40 -7 -7 -7 000 85 25 13 -11.8 -13.4 29.04 7 15 126 337 001 96 46 39 -7 -7 -7 000 86 25 14 -11.5 -13.4 29.03 7 15 126 337 001 93 43 39 -7 -7 -7 000 87 25 15 -11.1 -13.1 29.03 6 13 132 343 001 91 40 39 -7 -7 -7 000 88 25 16 -10.6 -13.0 29.03 6 11 134 345 003 87 38 38 -6 -7 -7 000 89 25 17 -10.0 -12.8 29.03 5 10 135 346 003 83 38 38 -6 -6 -7 000 90 25 18 -9.6 -12.3 29.02 4 9 144 355 002 84 38 38 -6 -6 -7 000 91 25 19 -9.1 -11.8 29.03 3 7 151 2 002 86 41 35 -6 -6 -7 000 92 25 20 -8.4 -11.4 29.03 4 6 149 0 001 83 43 34 -6 -7 -7 000 93 25 21 -8.0 -11.2 29.03 4 6 129 340 003 81 44 31 -6 -7 -7 000 94 25 22 -7.6 -10.5 29.04 3 5 101 312 000 84 44 35 -7 -7 -7 000 95 25 23 -7.2 -10.1 29.04 2 3 64 275 000 84 40 37 -6 -7 -7 000 96 26 00 -7.2 -9.7 29.03 3 3 36 247 001 86 35 37 -7 -7 -7 000 97 26 01 -7.4 -9.4 29.03 3 3 21 232 000 90 35 37 -7 -7 -7 000 98 26 02 -7.7 -9.3 29.04 4 4 9 220 001 93 38 34 -7 -7 -7 000 99 26 03 -8.2 -9.4 29.04 4 4 8 219 000 97 42 30 -7 -7 -8 000 100 26 04 -9.0 -10.0 29.03 4 4 9 220 000 101 42 31 -7 -7 -8 000 101 26 05 -9.9 -10.8 29.04 4 5 16 227 000 104 44 36 -6 -7 -8 000 102 26 06 -10.8 -11.6 29.04 5 5 23 234 000 105 44 36 -6 -7 -7 000 103 26 07 -11.4 -12.4 29.04 5 6 31 242 000 104 43 36 -7 -7 -7 000 104 26 08 -11.6 -13.2 29.04 5 6 28 239 000 96 41 33 -6 -7 -7 000 105 26 09 -11.7 -13.8 29.05 6 7 24 235 000 90 37 29 -6 -7 -7 000 106 26 10 -11.9 -14.3 29.05 6 8 27 238 000 87 33 31 -6 -6 -7 000 107 26 11 -12.0 -15.1 29.05 6 8 30 241 000 80 33 27 -6 -6 -7 000 108 26 12 -11.9 -16.9 29.05 7 8 31 242 001 63 28 26 -6 -6 -7 000 109 26 13 -11.7 -17.7 29.05 7 8 34 245 001 54 29 35 -5 -6 -7 000 110 26 14 -11.2 -17.4 29.05 7 8 32 243 002 52 28 32 -5 -6 -7 000 111 26 15 -10.7 -16.9 29.05 6 8 34 245 002 51 28 28 -5 -6 -7 000 112 26 16 -10.0 -16.4 29.05 6 7 37 248 002 49 29 27 -5 -6 -7 000 113 26 17 -9.3 -15.3 29.06 6 7 41 252 002 50 28 27 -5 -6 -7 000 114 26 18 -8.7 -14.3 29.06 5 6 48 259 002 52 27 27 -5 -6 -7 000 115 26 19 -7.9 -13.6 29.07 5 6 52 263 001 52 26 27 -5 -6 -7 000 116 26 20 -7.1 -13.1 29.07 4 6 59 270 001 50 26 27 -5 -6 -6 000 117 26 21 -6.5 -12.5 29.08 3 6 69 280 000 52 24 28 -5 -6 -7 000 118 26 22 -6.1 -11.7 29.08 3 6 91 302 000 56 23 29 -5 -6 -6 000 119 26 23 -5.8 -10.7 29.08 3 6 117 328 000 63 23 30 -5 -6 -6 000 120 27 00 -5.8 -10.2 29.08 4 8 122 333 000 66 24 32 -5 -6 -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.