USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-12/00 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 12 00 -11.5 -13.2 28.68 7 9 144 355 000 90 67 46 -11-11-11 000 1 12 01 -11.9 -12.7 28.66 8 10 147 358 000 105 70 47 -11-11-11 000 2 12 02 -12.0 -13.1 28.68 8 11 144 355 001 103 67 45 -11-11-11 000 3 12 03 -12.4 -13.7 28.66 8 12 144 355 000 102 68 47 -11-11-11 000 4 12 04 -12.8 -14.0 28.68 8 11 143 354 002 104 67 46 -11-11-11 000 5 12 05 -13.5 -14.2 28.66 7 11 139 350 001 109 65 46 -11-11-11 000 6 12 06 -14.3 -14.7 28.67 6 10 135 346 000 114 63 47 -11-10-11 000 7 12 07 -15.5 -15.9 28.67 5 10 132 343 000 116 60 47 -11-10-11 000 8 12 08 -16.3 -16.8 28.64 5 12 126 337 000 116 59 45 -10-10-11 000 9 12 09 -16.5 -17.1 28.67 6 12 121 332 000 116 57 44 -10-10-11 000 10 12 10 -16.3 -17.2 28.67 7 12 118 329 000 111 56 43 -10-10-11 000 11 12 11 -16.0 -16.9 28.67 7 12 119 330 000 111 55 41 -10-10-11 000 12 12 12 -15.9 -16.7 28.66 7 12 119 330 000 112 54 39 -10-10-11 000 13 12 13 -15.7 -16.4 28.66 7 13 118 329 000 113 54 38 -10-10-11 000 14 12 14 -15.4 -16.1 28.67 7 13 118 329 000 112 54 37 -10-10-11 000 15 12 15 -14.8 -15.9 28.69 7 14 119 330 000 106 53 36 -10-10-10 000 16 12 16 -14.2 -15.9 28.69 7 14 113 324 000 99 52 35 -10-10-10 000 17 12 17 -13.6 -16.3 28.70 7 13 108 319 000 88 50 34 -10-10-10 000 18 12 18 -12.9 -16.0 28.69 7 13 101 312 000 84 48 35 -9 -9-10 000 19 12 19 -12.0 -15.3 28.69 7 13 103 314 000 82 46 34 -9 -9-10 000 20 12 20 -11.2 -14.8 28.70 8 11 99 310 000 79 45 33 -9 -9-10 000 21 12 21 -10.7 -14.3 28.70 8 11 105 316 000 79 44 32 -8 -9 -9 000 22 12 22 -10.4 -14.0 28.71 8 11 108 319 000 79 42 32 -8 -8 -9 000 23 12 23 -10.3 -13.8 28.71 9 13 106 317 000 79 40 34 -8 -8 -9 000 24 13 00 -10.3 -13.8 28.71 9 13 105 316 000 79 38 34 -8 -8 -8 000 25 13 01 -10.3 -13.8 28.72 8 12 104 315 000 80 36 35 -7 -8 -8 000 26 13 02 -10.3 -13.8 28.72 8 13 99 310 000 79 32 67 -7 -7 -8 000 27 13 03 -10.2 -13.8 28.72 7 13 90 301 000 77 37 87 -7 -7 -7 000 28 13 04 -10.0 -13.6 28.71 7 12 79 290 000 77 60104 -6 -6 -7 000 29 13 05 -9.6 -12.5 28.72 7 9 62 273 000 82 99 86 -6 -6 -7 000 30 13 06 -9.7 -11.8 28.72 10 15 48 259 000 91 99100 -5 -6 -7 000 31 13 07 -8.1 -8.6 28.73 10 14 36 247 000 105101101 -7 -6 -7 000 32 13 08 -7.1 -7.3 28.73 10 14 29 240 -001 107103 95 -6 -6 -7 000 33 13 09 -6.6 -6.8 28.73 10 14 27 238 000 106103104 -6 -6 -7 002 34 13 10 -5.8 -5.9 28.73 11 16 12 223 -003 105107111 -6 -7 -7 005 35 13 11 -5.4 -5.9 28.73 10 15 8 219 -003 101107100 -6 -7 -8 001 36 13 12 -5.3 -5.4 28.74 9 13 8 219 -006 105107111 -5 -6 -7 002 37 13 13 -5.4 -5.5 28.75 10 14 5 216 -003 105107111 -6 -7 -8 014 38 13 14 -5.3 -5.4 28.75 11 18 12 223 -001 105107111 -6 -7 -8 018 39 13 15 -5.4 -5.5 28.75 13 17 0 211 -002 105107112 -6 -7 -8 011 40 13 16 -5.8 -5.9 28.76 12 20 357 208 -002 106108 98 -7 -8 -8 001 41 13 17 -6.4 -6.5 28.76 13 19 6 217 -003 106107100 -7 -8 -8 000 42 13 18 -6.7 -6.8 28.77 14 20 6 217 -001 107108108 -8 -8 -8 000 43 13 19 -6.1 -6.3 28.77 15 23 3 214 -005 105105101 -7 -8 -9 000 44 13 20 -6.5 -6.6 28.77 15 22 6 217 -004 106109 95 -8 -9 -9 000 45 13 21 -6.4 -6.7 28.78 15 21 7 218 -004 104105 91 -8 -8 -9 000 46 13 22 -6.2 -6.3 28.78 14 17 9 220 -007 105108105 -7 -8 -9 000 47 13 23 -6.0 -6.5 28.79 13 16 11 222 -007 102105104 -7 -8 -9 003 48 14 00 -6.0 -6.8 28.79 12 15 11 222 -005 99 91113 -7 -8 -9 000 49 14 01 -5.8 -6.9 28.78 12 15 7 218 -004 96 97113 -7 -8 -9 000 50 14 02 -5.7 -6.4 28.78 9 12 16 227 -001 99108113 -7 -8 -9 005 51 14 03 -5.7 -7.0 28.78 10 12 6 217 000 94108113 -7 -8 -9 007 52 14 04 -6.0 -7.1 28.79 9 11 9 220 -006 96107113 -7 -8 -9 000 53 14 05 -6.1 -7.1 28.79 8 11 13 224 003 98108113 -7 -8 -9 006 54 14 06 -6.2 -7.2 28.78 7 11 3 214 002 98 98111 -7 -8 -9 002 55 14 07 -6.5 -7.4 28.77 6 10 21 232 000 99 87111 -7 -8 -9 000 56 14 08 -6.8 -7.4 28.78 8 10 29 240 000 101107107 -8 -9 -9 000 57 14 09 -9.4 -9.5 28.78 4 10 47 258 -004 109 96105 -7 -8 -9 000 58 14 10 -9.7 -9.9 28.78 5 10 45 256 -003 109 93110 -7 -8 -9 000 59 14 11 -9.5 -9.7 28.78 5 8 50 261 -001 109 99109 -7 -8 -9 000 60 14 12 -8.8 -9.0 28.77 4 8 61 272 000 109 95110 -7 -8 -9 000 61 14 13 -7.4 -8.0 28.77 4 10 73 284 000 103 96106 -7 -8 -9 000 62 14 14 -6.4 -7.6 28.77 6 9 72 283 000 96 97112 -7 -7 -8 005 63 14 15 -6.1 -7.2 28.76 8 11 61 272 -003 97107111 -7 -7 -8 011 64 14 16 -6.0 -6.8 28.76 8 11 46 257 -002 99 84112 -6 -7 -9 003 65 14 17 -5.6 -6.6 28.76 8 10 30 241 -002 97100112 -7 -8 -9 002 66 14 18 -5.7 -6.7 28.76 9 11 17 228 -004 97 93112 -7 -8 -9 003 67 14 19 -5.7 -7.0 28.77 8 12 11 222 -009 94 94113 -7 -8 -9 005 68 14 20 -5.6 -6.8 28.77 8 12 5 216 000 95 96113 -7 -8 -9 003 69 14 21 -5.4 -7.5 28.78 8 14 347 198 -001 87100113 -7 -8 -9 000 70 14 22 -5.5 -8.2 28.78 7 11 338 189 -002 83 95113 -7 -8 -9 000 71 14 23 -5.4 -8.1 28.78 6 11 343 194 000 83 90113 -7 -8 -9 000 72 15 00 -5.2 -7.9 28.78 5 9 355 206 -001 83 98113 -6 -8 -9 000 73 15 01 -5.1 -7.8 28.79 5 7 348 199 000 83 98111 -6 -8 -9 000 74 15 02 -5.1 -7.6 28.79 5 7 336 187 003 84 99113 -6 -8 -9 000 75 15 03 -5.5 -7.5 28.79 6 6 332 183 001 88100108 -7 -8 -9 000 76 15 04 -6.6 -7.5 28.79 4 5 319 170 -003 99 80112 -7 -8 -9 000 77 15 05 -6.0 -7.6 28.80 4 5 345 196 000 93 81113 -7 -8 -9 000 78 15 06 -6.0 -7.6 28.80 3 4 343 194 -001 93 78113 -7 -8 -9 000 79 15 07 -6.1 -7.7 28.81 2 4 358 209 000 93 85113 -7 -8 -9 000 80 15 08 -6.2 -7.7 28.81 1 6 311 162 001 94 88113 -7 -8 -9 000 81 15 09 -6.5 -7.5 28.82 1 6 309 160 001 98 92114 -7 -8 -9 000 82 15 10 -6.6 -7.6 28.83 1 5 319 170 000 98 94114 -7 -8-10 000 83 15 11 -6.6 -7.7 28.84 1 4 338 189 -002 97 97114 -7 -8-10 000 84 15 12 -6.5 -8.2 28.85 2 4 350 201 -002 92 92114 -7 -8-10 000 85 15 13 -6.6 -7.8 28.85 2 3 324 175 001 96 96113 -7 -8-10 002 86 15 14 -6.5 -7.5 28.86 1 2 289 140 001 97 93109 -7 -9-10 016 87 15 15 -6.4 -7.9 28.87 2 4 277 128 000 94 93109 -7 -9-10 012 88 15 16 -6.3 -7.7 28.88 2 3 272 123 000 95109110 -7 -9-10 012 89 15 17 -6.4 -7.6 28.89 3 3 247 98 000 96109106 -7 -9-10 016 90 15 18 -6.3 -7.8 28.91 2 4 209 60 001 94106108 -7 -9-10 013 91 15 19 -6.1 -7.8 28.91 0 4 216 67 001 92109104 -7 -9-10 010 92 15 20 -6.3 -7.6 28.92 5 5 326 177 001 95103109 -7 -9-10 002 93 15 21 -7.1 -7.5 28.94 7 7 321 172 001 104 97109 -8 -9-10 001 94 15 22 -6.4 -7.6 28.96 8 8 316 167 000 95102107 -8 -9-10 001 95 15 23 -7.2 -8.8 28.97 7 7 309 160 -001 94 86 99 -8 -9-10 001 96 16 00 -7.7 -8.7 28.98 6 7 322 173 000 99 72 96 -8 -9-10 000 97 16 01 -7.7 -8.8 28.98 6 7 336 187 000 98 81 94 -8 -9-10 000 98 16 02 -8.1 -8.7 28.99 7 8 339 190 000 103 81 96 -9 -9-10 000 99 16 03 -8.4 -8.8 28.99 7 9 346 197 000 105 93100 -9 -9-11 000 100 16 04 -8.9 -9.9 29.00 7 9 346 197 000 100101103 -9-10-11 000 101 16 05 -10.0 -10.9 29.00 6 8 350 201 001 103 99106 -9-10-11 000 102 16 06 -11.0 -11.4 29.01 6 7 347 198 001 111 98104 -10-10-10 000 103 16 07 -11.8 -12.0 29.02 6 8 335 186 000 112 98106 -10-10-11 000 104 16 08 -11.7 -11.9 29.03 7 8 329 180 000 112 98101 -11-10-10 000 105 16 09 -12.1 -12.3 29.03 6 8 319 170 001 112 88106 -12-10-10 000 106 16 10 -12.0 -12.2 29.04 6 7 312 163 000 112 85112 -13-10-10 000 107 16 11 -12.1 -12.3 29.05 6 6 309 160 000 112 99115 -13-12-10 000 108 16 12 -13.0 -13.2 29.06 4 5 293 144 000 113103116 -13-12-11 000 109 16 13 -11.9 -12.0 29.06 2 7 301 152 000 112110111 -12-13-12 000 110 16 14 -10.6 -11.7 29.06 2 6 274 125 000 100113110 -11-13-14 000 111 16 15 -9.9 -11.4 29.06 3 5 299 150 000 98113106 -11-12-13 000 112 16 16 -10.0 -11.0 29.07 4 5 326 177 000 101110101 -11-12-13 000 113 16 17 -9.9 -10.9 29.07 6 6 318 169 000 101103115 -11-12-13 000 114 16 18 -9.7 -10.6 29.08 6 6 319 170 000 102110118 -11-12-13 000 115 16 19 -9.4 -10.5 29.08 5 6 317 168 000 100112118 -11-12-13 001 116 16 20 -9.0 -10.8 29.09 3 5 297 148 -001 93112117 -10-12-13 000 117 16 21 -8.7 -10.7 29.10 4 5 297 148 000 91107117 -10-11-13 001 118 16 22 -8.3 -10.3 29.10 4 5 290 141 000 91110117 -10-11-12 002 119 16 23 -8.0 -10.5 29.10 4 5 273 124 000 87103110 -9-11-12 000 120 17 00 -7.8 -10.4 29.10 4 6 259 110 000 86100113 -9-10-12 001 * 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.