USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-12/12 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 12 12 -15.3 -17.9 28.67 6 8 119 330 000 80 62 39 -12-11-11 000 1 12 13 -16.7 -17.4 28.67 7 9 119 330 000 114 59 39 -11-10-11 000 2 12 14 -16.5 -17.6 28.68 6 10 116 327 001 109 56 39 -10-10-11 000 3 12 15 -15.5 -17.3 28.68 7 11 117 328 000 100 54 39 -10-10-11 000 4 12 16 -14.8 -17.3 28.69 7 12 113 324 000 91 54 39 -10-10-11 000 5 12 17 -14.2 -17.3 28.69 6 12 110 321 000 85 52 37 -10-10-11 000 6 12 18 -13.5 -16.8 28.71 6 12 109 320 000 82 50 36 -10-10-10 000 7 12 19 -12.8 -16.2 28.70 6 12 104 315 000 81 50 37 -10-10-10 000 8 12 20 -12.1 -15.6 28.70 6 12 107 318 000 81 48 37 -9-10-10 000 9 12 21 -11.4 -15.3 28.72 7 11 107 318 000 77 46 36 -9 -9-10 000 10 12 22 -11.0 -14.8 28.73 7 10 105 316 000 77 45 36 -9 -9 -9 000 11 12 23 -10.7 -14.5 28.71 7 10 105 316 000 77 44 38 -9 -9 -9 000 12 13 00 -10.7 -14.3 28.72 7 11 108 319 000 78 44 38 -9 -9 -9 000 13 13 01 -10.8 -14.3 28.72 7 11 105 316 000 79 42 36 -8 -8 -9 000 14 13 02 -11.1 -14.4 28.73 6 10 103 314 000 80 39 34 -8 -8 -9 000 15 13 03 -11.6 -14.9 28.73 6 12 102 313 000 80 38 34 -8 -8 -8 000 16 13 04 -12.1 -15.7 28.74 6 12 93 304 000 77 36 35 -7 -8 -8 000 17 13 05 -12.3 -16.3 28.74 7 13 80 291 000 73 30 83 -7 -7 -8 000 18 13 06 -11.2 -15.2 28.73 7 12 64 275 000 73 38105 -7 -7 -8 000 19 13 07 -11.8 -15.1 28.73 8 12 52 263 000 79 82104 -6 -7 -7 000 20 13 08 -11.8 -13.4 28.73 9 12 41 252 000 97 90102 -6 -6 -7 000 21 13 09 -11.6 -12.2 28.73 8 12 33 244 000 108 93104 -6 -7 -7 000 22 13 10 -11.5 -11.8 28.74 8 12 30 241 000 111100102 -6 -7 -8 000 23 13 11 -9.1 -9.3 28.74 8 13 24 235 000 109107104 -6 -7 -8 001 24 13 12 -7.6 -7.8 28.74 8 14 18 229 -001 107107100 -6 -7 -8 002 25 13 13 -6.5 -6.7 28.74 10 14 14 225 -001 106107103 -6 -7 -8 005 26 13 14 -5.9 -6.0 28.75 9 14 11 222 -002 106107106 -6 -7 -8 004 27 13 15 -6.2 -6.5 28.75 10 14 12 223 000 103107108 -6 -7 -8 006 28 13 16 -6.3 -6.4 28.75 11 14 4 215 000 106 97112 -7 -7 -8 005 29 13 17 -5.7 -5.9 28.75 13 17 355 206 -002 105102112 -6 -7 -8 012 30 13 18 -5.9 -6.0 28.76 12 18 351 202 000 106101 98 -7 -7 -8 004 31 13 19 -6.3 -6.4 28.76 13 18 4 215 000 106 90 98 -6 -7 -8 000 32 13 20 -6.8 -6.9 28.77 13 19 5 216 -003 107 91 99 -8 -7 -8 000 33 13 21 -6.8 -6.8 28.78 13 19 6 217 -002 107108 98 -8 -8 -9 000 34 13 22 -6.0 -6.6 28.78 14 19 4 215 -004 101109 89 -7 -8-10 000 35 13 23 -6.0 -6.7 28.78 14 18 9 220 -005 100102 90 -7 -8 -9 000 36 14 00 -6.3 -7.0 28.78 15 17 13 224 -003 100 95 88 -7 -8 -9 000 37 14 01 -6.6 -6.8 28.79 14 17 9 220 -005 105 99 88 -8 -8 -9 000 38 14 02 -6.7 -6.7 28.79 13 17 8 219 -002 106 98 90 -8 -8 -9 000 39 14 03 -6.0 -6.8 28.79 12 15 9 220 -002 100 94 91 -7 -8 -9 000 40 14 04 -6.0 -7.0 28.79 10 13 6 217 000 97 99 98 -7 -8 -9 000 41 14 05 -6.0 -7.2 28.79 10 12 10 221 000 95 93113 -7 -8 -9 000 42 14 06 -6.0 -7.1 28.79 8 10 12 223 000 96 99114 -7 -8 -9 000 43 14 07 -6.3 -7.0 28.80 8 10 22 233 000 101104113 -7 -8 -9 001 44 14 08 -6.7 -7.3 28.79 8 10 22 233 003 102 96114 -7 -8 -9 000 45 14 09 -8.4 -8.7 28.79 6 8 38 249 000 107 95102 -7 -8 -9 005 46 14 10 -8.1 -8.3 28.79 6 8 40 251 001 108 87100 -7 -8 -9 000 47 14 11 -8.7 -8.8 28.79 6 8 53 264 000 108 89 99 -7 -8 -9 000 48 14 12 -9.4 -9.7 28.78 6 10 57 268 000 109102 92 -7 -8 -9 000 49 14 13 -8.2 -8.8 28.78 5 11 46 257 000 105 97 92 -8 -8 -9 000 50 14 14 -7.9 -8.1 28.79 6 11 53 264 000 107108100 -8 -9 -9 000 51 14 15 -6.8 -7.1 28.79 7 10 46 257 000 104104110 -8 -8 -9 000 52 14 16 -6.4 -7.0 28.79 9 10 31 242 000 102100107 -7 -8 -9 000 53 14 17 -6.1 -6.9 28.79 8 10 22 233 000 99106104 -7 -8 -9 000 54 14 18 -6.2 -6.9 28.79 8 9 8 219 000 100104110 -7 -8 -9 000 55 14 19 -6.7 -6.7 28.79 8 9 3 214 000 107 96101 -8 -8 -9 000 56 14 20 -6.6 -6.7 28.80 8 9 357 208 000 106 96 96 -8 -8 -9 000 57 14 21 -6.2 -7.8 28.80 7 8 2 214 -002 92 80 91 -7 -8 -9 000 58 14 22 -6.0 -8.0 28.81 5 6 359 210 000 89 81 90 -7 -8 -9 000 59 14 23 -6.1 -7.2 28.82 6 7 348 199 000 97 86 88 -7 -8 -9 000 60 15 00 -6.3 -6.6 28.82 6 7 347 198 001 103 90 91 -7 -8 -9 000 61 15 01 -6.2 -6.8 28.82 6 6 340 191 000 101102 87 -7 -9 -9 000 62 15 02 -6.4 -7.4 28.82 6 6 343 194 -001 98 94 87 -8 -8 -9 000 63 15 03 -6.4 -7.7 28.83 6 7 348 199 -001 95100 90 -7 -8 -9 000 64 15 04 -6.8 -7.1 28.83 7 8 338 189 -001 104 98 96 -7 -8 -9 000 65 15 05 -6.3 -7.4 28.83 7 7 328 179 000 97101 99 -7 -8 -9 000 66 15 06 -6.6 -7.8 28.84 6 8 323 174 -002 97 93 95 -7 -8 -9 000 67 15 07 -7.7 -7.8 28.85 6 7 317 168 000 107 86 91 -7 -8 -9 000 68 15 08 -7.5 -7.6 28.85 7 9 310 161 000 107 80 94 -8 -8 -9 000 69 15 09 -8.1 -8.2 28.86 6 7 306 157 -001 108 88 94 -9 -8 -9 000 70 15 10 -8.4 -8.6 28.87 6 7 318 169 000 108 75 91 -9 -8 -9 000 71 15 11 -8.6 -8.7 28.88 6 7 307 158 000 108 82 90 -9 -8 -9 000 72 15 12 -8.6 -8.8 28.89 6 6 309 160 000 108 88 94 -9 -8 -9 000 73 15 13 -8.9 -9.0 28.90 6 6 318 169 000 109 99 94 -10 -9 -9 000 74 15 14 -9.0 -9.0 28.91 4 5 311 162 000 109 96 98 -9 -8-10 000 75 15 15 -8.9 -9.0 28.92 3 8 303 154 000 109 98 90 -9 -9 -9 000 76 15 16 -8.3 -8.6 28.92 3 7 334 185 000 106106 99 -8 -9 -9 000 77 15 17 -7.2 -8.2 28.93 6 7 341 192 000 98110106 -8-10 -9 001 78 15 18 -7.6 -7.9 28.93 6 6 337 188 000 104110 97 -9-10-10 000 79 15 19 -7.7 -8.2 28.94 5 5 342 193 000 103110 98 -9-10-10 000 80 15 20 -7.6 -8.4 28.95 3 3 338 189 000 101110101 -9-10 -9 000 81 15 21 -7.8 -8.4 28.96 2 2 342 193 000 102110110 -9-10 -9 000 82 15 22 -7.8 -8.5 28.97 2 3 356 207 -001 101110 94 -9-10 -9 000 83 15 23 -8.0 -8.3 28.98 2 3 7 218 000 106111 96 -9-10 -9 000 84 16 00 -8.3 -8.3 28.99 2 2 24 235 000 108111 99 -9-11 -9 000 85 16 01 -8.4 -8.4 28.99 3 3 36 247 000 108111104 -9-11 -9 000 86 16 02 -8.3 -8.4 28.99 3 3 48 259 000 107111103 -9-11 -9 000 87 16 03 -8.1 -8.8 29.00 3 3 52 263 000 102111105 -9-11-10 000 88 16 04 -8.1 -9.0 29.00 3 3 52 263 000 101111 97 -9-11-10 000 89 16 05 -8.4 -9.1 29.01 3 4 69 280 000 102110103 -9-10-10 000 90 16 06 -8.3 -9.2 29.01 4 5 78 289 000 101104103 -9-10-10 000 91 16 07 -8.2 -9.1 29.02 5 6 64 275 000 101110105 -9-10-10 001 92 16 08 -8.4 -9.2 29.02 6 7 62 273 000 102105102 -9-10-10 000 93 16 09 -8.6 -9.2 29.02 6 7 66 277 000 104101 97 -10-10-10 000 94 16 10 -8.9 -9.5 29.03 6 8 55 266 000 104100 99 -10-10-10 000 95 16 11 -9.4 -9.6 29.04 7 10 54 265 000 109111100 -10-10-11 000 96 16 12 -8.6 -9.4 29.05 7 10 56 267 001 101111 96 -10-11-10 000 97 16 13 -8.6 -9.8 29.04 8 12 83 294 001 99111 88 -9-10-10 000 98 16 14 -9.7 -10.5 29.04 6 11 69 280 002 104108 98 -9-10-11 000 99 16 15 -7.9 -9.1 29.04 8 11 64 275 -002 97105 96 -9-10-11 001 100 16 16 -8.4 -9.5 29.04 6 11 65 276 000 99105113 -9-10-11 001 101 16 17 -7.5 -9.1 29.04 8 10 76 287 000 93110110 -9-10-10 001 102 16 18 -7.0 -8.7 29.05 7 8 74 285 000 93110109 -8-10-11 003 103 16 19 -6.7 -8.5 29.05 7 8 70 281 000 91109107 -8 -9-11 004 104 16 20 -6.5 -8.6 29.05 6 7 82 293 000 89107109 -8 -9-11 002 105 16 21 -6.2 -8.0 29.05 6 7 85 296 001 90109108 -7 -9-10 002 106 16 22 -6.0 -8.0 29.05 7 7 80 291 -001 89107107 -7 -9-10 003 107 16 23 -6.1 -8.2 29.05 7 8 85 296 -001 88107107 -7 -9-10 001 108 17 00 -6.5 -8.7 29.05 7 7 102 313 -001 88105104 -8 -9-10 000 109 17 01 -6.5 -8.3 29.05 6 7 108 319 000 91109100 -8 -9-10 000 110 17 02 -6.8 -8.6 29.04 7 7 110 321 000 91109 96 -8 -9-11 000 111 17 03 -7.0 -8.3 29.04 7 8 117 328 001 95110 94 -8-10-11 000 112 17 04 -7.6 -9.1 29.03 7 8 121 332 003 94110 97 -9-10-10 000 113 17 05 -7.9 -9.7 29.03 8 9 122 333 001 92110 95 -9-10-10 000 114 17 06 -8.0 -9.5 29.02 8 11 121 332 000 95111 92 -9-11 -9 000 115 17 07 -9.6 -10.7 29.02 7 12 125 336 003 100106 90 -9-10-10 000 116 17 08 -9.0 -10.1 29.01 5 13 132 343 001 100110 89 -9-10-10 000 117 17 09 -8.4 -9.4 29.01 9 12 122 333 000 101109 88 -9-10-11 000 118 17 10 -10.1 -10.5 29.01 7 12 131 342 000 109104 89 -9-10-10 000 119 17 11 -9.9 -10.1 29.00 6 12 127 338 000 110107 89 -9-10-11 000 120 17 12 -9.0 -9.2 28.99 8 12 136 347 003 109101 89 -9-10-11 000 * 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.