USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-09-19/00 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 19 00 -9.9 -12.3 28.22 7 9 129 340 -001 85 85 89 -9 -9-10 000 1 19 01 -11.5 -13.2 28.20 8 14 128 339 -001 96 75 88 -9 -8 -9 000 2 19 02 -12.0 -14.0 28.19 8 15 126 337 000 93 63 89 -8 -8 -9 000 3 19 03 -11.2 -13.7 28.17 8 16 129 340 -002 88 62 91 -8 -8 -9 000 4 19 04 -11.0 -13.3 28.14 10 19 122 333 -003 90 77 95 -9 -9 -9 001 5 19 05 -11.5 -13.2 28.13 8 15 119 330 000 96 79 88 -8 -8 -9 002 6 19 06 -11.4 -13.9 28.12 7 14 124 335 -001 88 67 86 -8 -8 -9 000 7 19 07 -11.4 -14.1 28.09 6 13 119 330 001 86 67 94 -8 -8 -9 001 8 19 08 -12.1 -14.8 28.06 5 11 85 296 001 84 66 99 -8 -8 -9 001 9 19 09 -12.4 -15.6 28.05 7 12 38 249 000 81 68 99 -9 -9-10 000 10 19 10 -13.9 -16.6 28.06 6 9 30 242 -003 87 67 96 -9 -9-10 000 11 19 11 -14.6 -16.6 28.06 7 9 5 216 -003 94 77 89 -9-10-10 000 12 19 12 -15.8 -16.4 28.05 10 14 351 202 000 112 78 90 -10-10-10 000 13 19 13 -17.9 -18.3 28.06 10 14 350 201 001 118 89 94 -10-10-11 000 14 19 14 -18.8 -19.2 28.08 10 16 352 203 001 119107 93 -11-11-11 000 15 19 15 -15.4 -15.7 28.10 10 18 351 202 002 115 96 91 -12-11-11 000 16 19 16 -15.9 -16.3 28.13 10 17 359 210 -001 116 85 88 -11-11-12 000 17 19 17 -17.6 -18.0 28.15 12 17 8 219 -002 118 81 87 -11-11-12 000 18 19 18 -18.1 -18.5 28.16 12 18 9 220 -004 119 81 74 -12-11-12 000 19 19 19 -18.5 -18.8 28.19 12 18 14 225 -007 119 79 73 -12-12-12 000 20 19 20 -18.6 -18.9 28.21 13 17 20 231 -008 119 88 71 -12-12-12 000 21 19 21 -18.3 -18.7 28.24 13 19 13 224 -005 119 89 74 -13-12-12 000 22 19 22 -17.9 -18.2 28.26 12 19 1 212 000 119 92 85 -13-12-12 000 23 19 23 -17.8 -18.5 28.29 12 18 356 207 001 114 95100 -13-13-13 005 24 20 00 -17.1 -19.0 28.32 12 18 351 202 000 101 94105 -14-13-13 015 25 20 01 -17.0 -19.0 28.36 11 17 350 201 003 99 96106 -14-14-14 020 26 20 02 -17.4 -19.4 28.39 11 17 358 209 000 99 96105 -15-15-15 016 27 20 03 -17.8 -19.7 28.43 10 18 3 214 -004 102 97101 -15-16-16 010 28 20 04 -18.1 -19.8 28.44 11 17 7 218 -005 103 97 97 -15-16-16 008 29 20 05 -19.0 -20.3 28.47 11 16 15 226 -008 109 99 93 -15-16-16 003 30 20 06 -20.8 -21.7 28.52 9 14 22 233 -005 117100 92 -16-16-16 002 31 20 07 -23.1 -23.7 28.56 9 13 28 239 -005 124103 94 -17-16-16 000 32 20 08 -23.7 -24.3 28.59 8 13 26 237 -009 125103 84 -18-15-16 000 33 20 09 -21.8 -22.2 28.61 7 13 33 244 -003 123112 85 -19-16-17 000 34 20 10 -20.3 -20.7 28.64 9 15 36 247 000 121119 79 -18-18-17 000 35 20 11 -19.5 -19.9 28.67 11 17 31 242 -003 120112 85 -18-18-16 000 36 20 12 -19.5 -19.9 28.69 12 17 27 238 -003 120 83 85 -19-15-16 000 37 20 13 -19.7 -20.1 28.72 11 15 31 242 -006 121 82 86 -17-16-16 000 38 20 14 -20.6 -21.0 28.75 9 12 33 244 -005 122 84 91 -16-16-16 000 39 20 15 -22.1 -22.6 28.76 5 6 22 233 -006 123 91 97 -15-16-16 000 40 20 16 -21.0 -21.8 28.78 2 4 19 230 -004 122 96100 -16-16-16 001 41 20 17 -19.3 -20.6 28.80 2 3 64 275 -003 107101107 -16-16-17 004 42 20 18 -18.3 -19.9 28.80 1 1 15 226 -005 104103108 -16-16-17 005 43 20 19 -19.4 -21.7 28.82 6 7 203 54 000 99103105 -17-17-17 018 44 20 20 -19.5 -21.7 28.83 6 10 186 37 000 99103106 -19-17-18 022 45 20 21 -19.6 -21.8 28.84 6 8 207 58 -002 99103106 -19-17-18 018 46 20 22 -19.6 -21.9 28.85 5 7 203 54 -002 99100105 -18-17-18 022 47 20 23 -20.8 -22.9 28.86 4 5 266 117 -002 103103102 -19-18-18 009 48 21 00 -22.9 -24.0 28.87 5 6 285 136 000 117104102 -20-19-18 002 49 21 01 -24.8 -25.4 28.88 6 8 296 147 -001 125113101 -20-21-19 000 50 21 02 -26.6 -27.3 28.88 6 7 298 149 -001 128113103 -21-21-19 000 51 21 03 -25.6 -25.7 28.89 3 5 296 147 000 127113103 -22-20-20 000 52 21 04 -25.7 -25.9 28.90 2 4 347 198 000 127109105 -22-21-20 000 53 21 05 -26.1 -26.3 28.91 4 4 1 212 000 127101105 -21-20-20 000 54 21 06 -28.3 -28.9 28.92 6 8 12 223 000 129100106 -21-20-20 000 55 21 07 -30.1 -30.9 28.92 7 9 23 234 000 133108106 -21-20-20 000 56 21 08 -31.1 -32.2 28.93 7 9 24 235 000 128113106 -21-21-21 001 57 21 09 -31.4 -33.0 28.94 7 9 21 232 000 123112103 -21-21-21 001 58 21 10 -30.4 -32.7 28.95 7 9 7 218 000 110111102 -22-22-21 002 59 21 11 -30.7 -32.9 28.95 7 11 357 208 000 112108101 -22-22-21 003 60 21 12 -31.2 -33.1 28.96 8 13 349 200 000 116105104 -22-22-21 001 61 21 13 -31.1 -32.8 28.97 8 12 341 192 000 120108106 -23-22-21 001 62 21 14 -31.3 -32.8 28.97 8 12 341 192 000 121105107 -23-22-21 001 63 21 15 -31.1 -32.6 28.98 8 13 336 187 000 123104107 -22-22-22 001 64 21 16 -31.0 -32.2 28.98 8 13 329 180 000 125102106 -22-22-22 001 65 21 17 -30.4 -31.6 28.98 8 12 324 175 000 124104107 -22-22-22 000 66 21 18 -30.1 -31.5 28.99 8 12 322 173 000 119105106 -22-22-22 000 67 21 19 -29.8 -31.6 29.00 7 11 323 174 000 113106102 -22-22-22 000 68 21 20 -29.5 -31.8 29.01 7 9 326 177 000 106 96102 -22-22-21 000 69 21 21 -28.9 -32.1 29.00 6 8 321 172 000 93 82101 -22-22-21 000 70 21 22 -28.1 -32.1 29.00 5 6 317 168 000 86 70103 -22-22-22 000 71 21 23 -27.2 -31.7 29.00 4 4 319 170 000 82 65105 -22-22-21 000 72 22 00 -27.0 -31.4 29.00 2 2 334 185 000 83 67103 -22-21-21 000 73 22 01 -27.0 -31.0 29.00 2 2 16 227 -001 85 70103 -22-21-21 000 74 22 02 -27.0 -30.5 28.99 3 3 36 247 000 90 66 98 -21-21-21 000 75 22 03 -27.2 -29.7 28.98 5 5 49 260 003 99 54 88 -21-21-21 000 76 22 04 -29.0 -30.5 28.97 7 8 52 263 001 111 48 73 -21-21-20 000 77 22 05 -29.5 -30.7 28.97 8 9 51 262 000 115 47 55 -21-20-20 000 78 22 06 -29.3 -30.3 28.96 7 8 54 265 000 118 48 44 -20-20-20 000 79 22 07 -28.8 -30.2 28.95 7 7 62 273 001 112 48 42 -20-20-20 000 80 22 08 -28.6 -29.4 28.94 7 7 69 280 001 118 55 39 -20-21-20 000 81 22 09 -28.7 -29.3 28.93 8 8 76 287 000 121 66 39 -20-20-20 000 82 22 10 -28.9 -29.3 28.91 8 10 78 289 000 126 68 39 -20-20-19 000 83 22 11 -29.1 -29.4 28.89 9 11 81 292 000 129 66 37 -19-20-19 000 84 22 12 -29.0 -29.4 28.88 9 12 86 297 001 129 69 37 -19-19-19 000 85 22 13 -28.7 -29.2 28.87 9 13 92 303 000 129 67 38 -19-19-19 000 86 22 14 -28.3 -28.8 28.85 9 13 98 309 000 129 70 35 -19-19-19 000 87 22 15 -27.9 -28.4 28.83 10 15 104 315 001 128 77 34 -18-19-19 000 88 22 16 -27.6 -28.1 28.81 10 15 107 318 001 128 74 30 -18-18-19 000 89 22 17 -27.5 -28.0 28.80 9 15 108 319 001 128 70 26 -18-18-18 000 90 22 18 -27.2 -27.8 28.78 9 14 112 323 000 127 67 25 -18-17-18 000 91 22 19 -26.9 -27.5 28.76 9 14 115 326 000 127 65 36 -18-17-18 000 92 22 20 -26.5 -27.0 28.74 8 12 114 325 000 127 66 57 -17-17-18 000 93 22 21 -26.1 -26.7 28.72 8 13 119 330 000 126 69 66 -17-17-18 000 94 22 22 -25.9 -26.5 28.70 8 13 122 333 001 126 69 63 -17-17-18 000 95 22 23 -25.8 -26.3 28.69 8 12 120 331 000 126 66 61 -17-17-17 000 96 23 00 -25.8 -26.2 28.67 7 12 119 330 001 126 63 57 -17-16-17 000 97 23 01 -26.2 -26.8 28.66 8 13 119 330 001 126 59 54 -17-16-17 000 98 23 02 -26.4 -26.9 28.64 8 13 115 326 001 126 59 53 -16-16-16 000 99 23 03 -26.3 -26.6 28.62 8 14 112 323 001 126 56 51 -16-16-16 000 100 23 04 -26.3 -26.5 28.60 8 13 110 321 001 126 54 54 -16-16-16 000 101 23 05 -26.1 -26.8 28.58 9 14 110 321 001 117 54 53 -16-16-16 000 102 23 06 -25.8 -27.0 28.57 9 14 111 322 001 110 49 52 -16-16-17 000 103 23 07 -25.9 -27.0 28.55 9 13 114 325 000 112 48 53 -16-16-17 000 104 23 08 -26.1 -27.2 28.55 8 13 116 327 000 112 49 54 -16-16-17 000 105 23 09 -25.8 -27.3 28.53 8 12 113 324 000 107 50 55 -16-17-17 000 106 23 10 -24.9 -27.0 28.52 7 11 116 327 000 99 51 57 -16-16-17 000 107 23 11 -23.7 -26.4 28.51 6 10 124 335 001 94 53 59 -17-16-17 000 108 23 12 -23.3 -26.3 28.51 4 8 128 339 001 91 54 59 -17-17-17 000 109 23 13 -23.2 -26.3 28.50 3 7 129 340 001 89 53 61 -17-17-17 000 110 23 14 -23.2 -26.3 28.50 2 6 135 346 000 88 52 61 -17-17-17 000 111 23 15 -23.1 -26.3 28.49 1 5 153 4 000 86 52 55 -17-17-17 000 112 23 16 -23.1 -26.3 28.49 1 5 207 58 000 86 53 50 -17-17-17 000 113 23 17 -23.3 -26.3 28.49 2 6 220 71 000 88 53 46 -17-17-17 000 114 23 18 -23.6 -26.2 28.49 3 7 217 68 000 93 53 45 -17-17-17 000 115 23 19 -23.7 -26.0 28.49 3 7 227 78 001 97 52 43 -17-17-17 000 116 23 20 -23.6 -25.9 28.49 3 6 234 85 000 98 46 43 -17-17-17 000 117 23 21 -23.5 -25.9 28.49 3 7 246 97 001 97 42 42 -17-17-17 000 118 23 22 -23.6 -25.9 28.49 4 7 247 98 000 99 42 40 -17-17-17 000 119 23 23 -23.8 -26.0 28.50 4 7 249 100 000 100 42 37 -17-17-17 000 120 24 00 -23.7 -26.2 28.50 4 6 270 121 000 97 41 34 -17-17-17 000 * 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.