USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-09-19/12 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 19 12 -14.9 -17.3 28.10 6 6 354 205 -001 74 59 79 -10-10-10 000 1 19 13 -18.4 -18.8 28.10 8 10 340 191 001 117 69 82 -10-10-10 000 2 19 14 -19.0 -19.5 28.12 9 11 343 194 000 118 78 83 -10-10-11 000 3 19 15 -18.5 -19.0 28.13 9 13 334 185 002 118 89 84 -10-11-11 000 4 19 16 -18.1 -18.7 28.14 8 11 335 186 003 117 95 80 -10-11-11 000 5 19 17 -16.9 -17.4 28.14 7 11 334 185 -002 116 95 76 -10-11-11 000 6 19 18 -16.1 -16.6 28.16 7 11 330 181 000 116 84 77 -10-11-11 000 7 19 19 -15.9 -16.3 28.16 7 12 332 183 000 116 78 79 -10-11-12 000 8 19 20 -15.7 -16.1 28.20 6 11 333 184 -002 116 77 80 -11-11-12 000 9 19 21 -15.0 -15.3 28.19 6 12 326 177 000 115 77 87 -11-11-12 000 10 19 22 -14.4 -15.6 28.22 7 12 320 171 000 104 84 97 -11-11-12 001 11 19 23 -14.2 -15.7 28.25 6 12 313 164 -002 101 95102 -12-12-13 008 12 20 00 -14.3 -16.0 28.27 6 12 321 172 -003 100101104 -12-13-13 011 13 20 01 -14.8 -16.7 28.29 8 12 328 179 -004 99102101 -12-13-14 022 14 20 02 -16.4 -18.4 28.32 10 15 340 191 -003 99101100 -12-13-14 015 15 20 03 -18.2 -20.3 28.36 12 17 345 196 -003 99 98 96 -13-13-14 009 16 20 04 -19.6 -21.8 28.42 14 19 350 201 -001 100 96 96 -14-13-14 005 17 20 05 -20.7 -22.7 28.46 16 22 357 208 -003 103 95 95 -16-14-14 003 18 20 06 -21.7 -23.0 28.49 16 22 5 216 -004 113 94 91 -17-14-14 001 19 20 07 -24.3 -24.8 28.53 14 20 12 223 -009 126 98 83 -17-15-15 000 20 20 08 -25.8 -26.3 28.57 12 20 20 231 -006 128104 77 -18-16-15 000 21 20 09 -26.0 -26.5 28.60 13 21 23 235 -004 128102 74 -18-16-16 000 22 20 10 -25.4 -25.9 28.63 13 22 23 234 000 127 96 66 -18-16-16 000 23 20 11 -25.0 -25.5 28.66 14 22 20 231 000 127 92 69 -17-15-16 000 24 20 12 -24.9 -25.4 28.69 12 20 22 233 -004 127104 74 -17-16-17 000 25 20 13 -25.0 -25.5 28.74 10 17 27 238 -007 127104 77 -17-16-17 000 26 20 14 -24.7 -25.4 28.77 7 13 44 255 -009 127102 84 -18-16-17 000 27 20 15 -22.1 -22.6 28.79 7 12 59 270 -008 123104 89 -19-16-17 000 28 20 16 -21.7 -22.3 28.79 6 9 44 255 -006 123 94 97 -17-16-17 000 29 20 17 -21.7 -22.5 28.79 5 8 20 231 -007 123 86107 -16-16-16 000 30 20 18 -20.2 -21.4 28.82 4 8 37 248 002 113 93110 -16-16-16 005 31 20 19 -19.7 -21.5 28.83 5 7 64 275 001 105100110 -17-16-17 015 32 20 20 -19.7 -20.7 28.84 4 5 86 297 001 111103110 -17-17-18 008 33 20 21 -21.0 -21.5 28.84 1 5 173 24 002 118111114 -17-18-18 005 34 20 22 -21.0 -22.3 28.85 2 5 221 72 -001 110109116 -18-18-18 004 35 20 23 -20.5 -22.3 28.85 3 5 159 10 -003 106104112 -17-18-18 003 36 21 00 -20.1 -22.3 28.86 1 3 170 21 -001 101104104 -18-18-18 010 37 21 01 -20.4 -22.7 28.88 4 4 231 82 -002 99102102 -19-19-18 021 38 21 02 -20.8 -23.2 28.89 3 4 237 88 001 99101101 -21-19-19 016 39 21 03 -21.9 -24.3 28.89 5 5 320 171 -001 99101102 -21-19-19 009 40 21 04 -23.3 -25.9 28.90 7 9 339 190 000 99 99102 -21-19-19 007 41 21 05 -24.5 -27.1 28.90 9 12 355 206 000 100 98104 -20-19-19 006 42 21 06 -26.1 -28.1 28.91 10 15 4 215 000 109 94104 -20-19-19 004 43 21 07 -27.1 -28.7 28.92 12 17 11 222 000 115 94102 -22-19-19 002 44 21 08 -28.3 -29.8 28.93 12 17 16 227 000 118 96103 -22-19-19 002 45 21 09 -29.2 -30.6 28.93 10 15 21 232 000 121 98106 -21-20-20 001 46 21 10 -29.8 -31.2 28.93 10 14 20 231 000 121 98108 -21-20-20 000 47 21 11 -30.2 -31.8 28.94 9 13 16 227 000 119 99106 -21-21-21 001 48 21 12 -30.5 -32.1 28.94 9 13 11 222 -001 119100104 -21-21-21 001 49 21 13 -30.3 -31.9 28.95 9 13 8 219 000 119104104 -21-21-22 001 50 21 14 -30.6 -32.2 28.96 9 12 358 209 000 119103104 -21-21-22 001 51 21 15 -31.2 -32.8 28.97 8 11 349 200 000 121105104 -22-22-22 001 52 21 16 -30.8 -31.9 28.98 6 10 339 190 000 124102105 -22-22-22 000 53 21 17 -29.5 -29.9 28.98 6 9 330 181 000 131102107 -22-22-22 000 54 21 18 -29.1 -29.7 28.98 7 10 330 181 -001 127101107 -22-22-22 000 55 21 19 -28.7 -29.4 28.99 6 9 330 181 000 127100107 -22-22-22 000 56 21 20 -28.2 -28.8 28.99 6 8 329 180 001 126100107 -22-22-22 000 57 21 21 -27.0 -27.4 28.99 4 6 327 178 001 125102106 -22-22-23 000 58 21 22 -26.4 -26.7 28.99 3 4 327 178 000 124102103 -22-22-23 000 59 21 23 -26.2 -26.5 28.99 3 3 334 185 000 124102100 -22-22-22 000 60 22 00 -26.3 -26.5 28.99 1 1 5 216 001 124103 99 -22-22-22 000 61 22 01 -26.6 -26.6 28.98 1 1 49 260 001 126103100 -22-22-22 000 62 22 02 -27.4 -27.4 28.97 3 4 72 283 -002 129 98103 -22-22-22 000 63 22 03 -28.1 -28.1 28.96 5 5 61 272 000 130 96 99 -22-22-22 000 64 22 04 -29.4 -29.8 28.94 7 7 62 273 001 130 95 95 -21-21-22 000 65 22 05 -29.5 -29.9 28.93 7 7 69 280 001 131 94 94 -21-21-22 000 66 22 06 -29.6 -29.9 28.92 7 7 78 289 001 131 93 93 -21-21-21 000 67 22 07 -29.9 -30.4 28.92 7 9 93 304 000 131 94 93 -21-21-21 000 68 22 08 -29.5 -29.9 28.91 8 10 103 314 001 130 93 91 -21-21-21 000 69 22 09 -29.3 -29.8 28.89 8 11 107 318 000 130 91 87 -21-21-21 000 70 22 10 -29.4 -30.0 28.86 8 11 105 316 001 130 88 83 -21-21-21 000 71 22 11 -29.5 -30.1 28.85 9 12 98 309 000 130 88 83 -21-21-20 000 72 22 12 -29.2 -29.8 28.83 9 13 95 306 000 130 87 81 -20-20-20 000 73 22 13 -28.8 -29.4 28.81 9 15 94 305 001 130 85 80 -20-20-20 000 74 22 14 -28.4 -29.0 28.79 10 16 96 307 001 130 87 83 -20-20-20 000 75 22 15 -28.2 -28.8 28.77 10 18 101 312 000 130 86 80 -19-19-19 000 76 22 16 -28.1 -28.7 28.76 9 17 100 311 001 130 83 78 -19-19-19 000 77 22 17 -27.5 -28.1 28.74 9 17 97 308 001 129 80 78 -19-19-19 000 78 22 18 -27.1 -27.7 28.72 9 17 98 309 000 128 77 77 -18-18-18 000 79 22 19 -26.9 -27.5 28.70 9 17 99 310 000 128 70 75 -18-18-18 000 80 22 20 -26.4 -27.1 28.69 9 17 97 308 001 128 66 71 -18-18-18 000 81 22 21 -26.0 -26.5 28.67 9 17 99 310 001 127 63 67 -18-17-18 000 82 22 22 -25.5 -26.5 28.65 10 17 101 312 001 120 63 63 -17-17-17 000 83 22 23 -25.5 -26.5 28.64 9 16 100 311 000 120 59 60 -17-17-17 000 84 23 00 -25.7 -26.6 28.62 9 14 96 307 001 121 55 56 -16-16-17 000 85 23 01 -25.8 -26.5 28.61 9 14 88 299 000 122 53 52 -16-16-17 000 86 23 02 -25.5 -26.0 28.60 10 15 86 297 000 125 52 50 -16-16-16 000 87 23 03 -25.5 -25.9 28.58 10 15 87 298 000 124 52 50 -16-16-16 000 88 23 04 -25.6 -25.9 28.56 10 16 91 303 001 125 52 48 -16-16-16 000 89 23 05 -25.2 -25.7 28.55 10 17 94 305 001 124 47 47 -16-16-17 000 90 23 06 -24.8 -26.6 28.54 11 20 96 307 001 105 51 51 -16-16-16 000 91 23 07 -24.6 -26.9 28.53 11 20 100 311 000 99 51 53 -16-16-17 000 92 23 08 -24.7 -26.9 28.51 11 19 103 314 000 101 53 50 -16-16-17 000 93 23 09 -25.0 -26.9 28.50 10 17 106 317 000 104 56 49 -16-16-16 000 94 23 10 -25.4 -26.9 28.48 10 16 109 320 001 109 53 47 -16-16-16 000 95 23 11 -25.7 -26.9 28.47 10 15 113 324 000 114 49 45 -16-16-16 000 96 23 12 -26.1 -27.0 28.46 10 15 116 327 000 117 45 38 -16-15-16 000 97 23 13 -26.4 -27.3 28.45 10 15 121 332 000 118 41 35 -16-15-15 000 98 23 14 -26.5 -27.8 28.44 10 16 120 331 001 112 38 34 -15-15-15 000 99 23 15 -26.2 -28.1 28.42 10 16 117 328 000 104 37 31 -15-15-15 000 100 23 16 -25.8 -28.4 28.42 10 16 114 325 000 94 35 28 -15-15-15 000 101 23 17 -25.2 -28.5 28.41 10 15 113 324 000 85 33 26 -14-14-15 000 102 23 18 -24.6 -28.6 28.40 9 14 112 323 000 78 31 24 -14-14-15 000 103 23 19 -24.1 -28.6 28.39 9 14 113 324 001 73 30 23 -14-14-15 000 104 23 20 -23.6 -28.4 28.39 9 13 110 321 000 70 29 22 -14-14-14 000 105 23 21 -23.1 -28.2 28.38 9 13 108 319 001 67 28 21 -13-14-14 000 106 23 22 -22.7 -28.3 28.38 8 12 106 317 000 63 28 21 -13-14-14 000 107 23 23 -22.1 -28.7 28.37 7 10 102 313 002 57 27 20 -13-13-14 000 108 24 00 -20.8 -28.9 28.37 6 7 97 308 002 53 27 20 -13-13-14 000 109 24 01 -20.1 -29.1 28.37 4 5 88 299 000 49 27 19 -13-14-14 000 110 24 02 -19.9 -29.4 28.37 3 3 80 291 -001 46 28 19 -13-14-14 000 111 24 03 -21.2 -29.5 28.37 3 3 13 224 -001 53 29 18 -13-14-14 000 112 24 04 -20.9 -28.3 28.37 5 5 305 156 003 58 26 19 -13-13-14 000 113 24 05 -19.9 -29.0 28.37 3 3 291 142 001 48 26 20 -13-13-14 000 114 24 06 -19.8 -29.5 28.38 2 2 299 150 000 45 26 20 -13-13-14 000 115 24 07 -20.3 -29.6 28.39 3 4 273 124 -001 47 25 20 -13-13-14 000 116 24 08 -20.4 -29.5 28.39 4 5 281 132 -001 48 26 19 -13-14-14 000 117 24 09 -20.7 -29.1 28.40 4 5 293 144 000 52 27 19 -14-14-14 000 118 24 10 -23.3 -28.9 28.41 7 7 306 157 000 67 26 20 -14-14-14 000 119 24 11 -24.5 -29.4 28.43 8 9 313 164 000 70 27 20 -14-14-14 000 120 24 12 -24.6 -29.6 28.44 8 10 315 166 000 69 27 20 -14-14-14 000 * 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.