USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-28/12 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 28 12 -22.0 -25.3 28.82 2 3 334 185 000 81 69 47 -16-16-15 000 1 28 13 -20.5 -22.0 28.83 4 4 315 166 000 106 71 50 -16-16-15 000 2 28 14 -20.6 -21.9 28.80 4 4 311 162 000 107 70 52 -16-15-15 000 3 28 15 -20.2 -21.8 28.81 4 4 302 153 001 105 71 54 -16-16-15 000 4 28 16 -19.7 -21.7 28.81 3 4 287 138 000 100 71 51 -16-15-15 000 5 28 17 -19.3 -21.7 28.80 2 4 273 124 000 97 69 49 -16-15-15 000 6 28 18 -18.9 -21.6 28.79 1 2 275 126 000 93 67 49 -16-15-15 000 7 28 19 -18.4 -21.5 28.77 1 2 288 139 000 90 67 47 -16-15-15 000 8 28 20 -17.8 -21.3 28.77 1 2 293 144 000 86 66 46 -16-15-15 000 9 28 21 -17.4 -21.0 28.78 1 2 277 128 000 84 65 44 -15-15-15 000 10 28 22 -17.1 -20.5 28.79 1 1 285 136 000 83 63 41 -15-15-14 000 11 28 23 -16.9 -20.2 28.76 1 2 278 129 000 84 62 41 -15-14-14 000 12 29 00 -16.9 -20.2 28.75 1 2 238 89 001 85 61 40 -15-14-14 000 13 29 01 -17.0 -20.4 28.75 1 2 214 65 000 86 59 38 -15-14-14 000 14 29 02 -17.2 -20.6 28.75 0 1 163 14 000 87 57 37 -15-14-14 000 15 29 03 -17.4 -20.8 28.75 1 1 87 298 000 86 56 35 -14-14-14 000 16 29 04 -17.7 -21.1 28.75 3 3 50 261 000 86 56 34 -14-14-14 000 17 29 05 -18.8 -21.9 28.74 5 5 30 241 000 88 54 33 -14-14-14 000 18 29 06 -19.6 -22.3 28.72 5 6 24 235 000 92 51 32 -14-14-14 000 19 29 07 -19.8 -22.4 28.72 5 6 23 234 000 93 50 33 -14-13-13 000 20 29 08 -19.6 -22.3 28.72 5 5 22 233 000 92 49 33 -13-13-13 000 21 29 09 -19.4 -22.2 28.71 5 5 25 236 000 92 48 31 -13-13-13 000 22 29 10 -19.7 -22.4 28.70 5 6 28 239 000 92 47 30 -13-13-13 000 23 29 11 -19.9 -22.6 28.69 5 6 32 243 000 91 45 31 -13-13-13 000 24 29 12 -20.0 -22.8 28.69 6 6 37 248 000 91 44 34 -13-13-13 000 25 29 13 -20.1 -22.9 28.69 6 7 40 251 000 90 42 36 -13-13-13 000 26 29 14 -19.9 -22.8 28.69 7 8 43 254 000 89 41 37 -12-12-12 000 27 29 15 -19.4 -22.5 28.69 8 10 43 254 000 86 41 36 -12-12-12 000 28 29 16 -18.5 -22.0 28.68 8 11 42 253 000 84 40 34 -12-12-12 000 29 29 17 -17.7 -21.4 28.67 8 11 43 254 000 80 41 32 -11-11-11 000 30 29 18 -16.8 -21.0 28.66 8 11 45 256 000 76 41 32 -11-11-11 000 31 29 19 -16.0 -20.4 28.67 7 11 46 257 000 73 40 31 -11-11-11 000 32 29 20 -15.2 -19.9 28.67 7 10 47 258 000 70 38 31 -10-10-11 000 33 29 21 -14.4 -19.2 28.68 7 10 46 257 000 69 35 30 -10-10-10 000 34 29 22 -13.8 -18.7 28.67 7 10 47 258 000 68 33 30 -10-10-10 000 35 29 23 -13.4 -18.3 28.67 7 11 46 257 000 68 31 33 -9 -9-10 000 36 30 00 -13.2 -18.2 28.66 7 11 47 258 000 66 29 39 -9 -9-10 000 37 30 01 -13.0 -18.3 28.66 7 11 47 258 000 64 27 42 -9 -9 -9 000 38 30 02 -13.0 -18.4 28.67 8 11 47 258 000 62 31 48 -8 -9 -9 000 39 30 03 -13.0 -18.5 28.67 8 12 50 261 000 61 39 61 -8 -8 -9 000 40 30 04 -13.1 -18.4 28.67 8 12 52 263 000 62 46 62 -8 -8 -9 000 41 30 05 -13.0 -17.6 28.67 8 12 53 264 000 68 51 61 -8 -8 -9 000 42 30 06 -12.7 -16.8 28.67 8 12 55 266 000 73 50 67 -8 -8 -8 000 43 30 07 -12.6 -16.3 28.67 8 12 58 269 000 76 50 72 -7 -8 -8 000 44 30 08 -12.4 -16.0 28.66 8 13 58 269 000 78 51 87 -7 -8 -8 000 45 30 09 -11.9 -15.5 28.66 8 14 55 266 000 78 50 94 -7 -8 -8 000 46 30 10 -11.5 -15.6 28.67 8 13 55 266 001 72 64 98 -7 -8 -9 000 47 30 11 -11.1 -15.6 28.67 7 12 53 264 001 69 64100 -8 -8 -8 000 48 30 12 -10.9 -15.0 28.67 7 13 51 262 001 72 71102 -8 -8 -8 000 49 30 13 -10.8 -14.1 28.67 7 11 47 258 000 81 81103 -8 -8 -8 002 50 30 14 -10.7 -12.6 28.68 6 9 41 252 001 94 92103 -8 -8 -8 007 51 30 15 -10.3 -11.6 28.69 7 10 31 242 001 99 97102 -8 -8 -8 008 52 30 16 -9.8 -11.0 28.70 8 11 25 236 002 100 97102 -8 -8 -8 010 53 30 17 -9.3 -10.4 28.70 9 12 18 229 002 101 97102 -8 -8 -8 010 54 30 18 -9.0 -9.9 28.70 9 11 15 226 000 102 97101 -8 -8 -9 007 55 30 19 -8.8 -9.3 28.71 9 10 8 219 000 105 95100 -8 -8 -8 004 56 30 20 -8.2 -8.7 28.72 8 9 8 219 -002 104 94101 -7 -7 -8 004 57 30 21 -7.5 -8.3 28.73 7 9 13 224 -002 101 96100 -7 -8 -8 008 58 30 22 -7.2 -8.0 28.74 8 9 21 232 -001 101 96100 -7 -8 -8 007 59 30 23 -7.2 -7.9 28.76 9 11 18 229 000 101100 99 -8 -8 -8 004 60 31 00 -7.4 -8.1 28.77 9 11 20 231 001 102 97100 -8 -8 -8 002 61 31 01 -7.6 -8.3 28.78 9 12 16 227 000 102 94101 -8 -8 -8 001 62 31 02 -7.7 -8.3 28.79 9 11 13 224 000 103100100 -7 -8 -8 000 63 31 03 -8.0 -8.4 28.80 9 13 15 226 000 105107 99 -8 -8 -8 001 64 31 04 -7.4 -8.1 28.81 9 14 11 222 000 102109100 -8 -9 -7 000 65 31 05 -8.2 -8.4 28.82 9 14 8 219 000 108105102 -7 -8 -8 000 66 31 06 -9.0 -9.2 28.83 8 15 14 225 000 109105103 -7 -8 -9 000 67 31 07 -8.5 -8.7 28.84 9 16 7 218 000 108102102 -7 -8 -8 000 68 31 08 -8.2 -8.3 28.86 10 18 3 214 002 108104105 -7 -8 -8 000 69 31 09 -7.6 -7.9 28.88 10 18 4 215 000 105101 91 -7 -8 -7 000 70 31 10 -7.3 -8.0 28.89 11 19 4 215 001 102101 87 -6 -7 -7 000 71 31 11 -7.3 -8.2 28.90 11 18 4 216 -001 100102 85 -7 -7 -7 000 72 31 12 -7.6 -7.9 28.92 11 15 5 216 -002 105 96 81 -7 -7 -7 000 73 31 13 -7.8 -7.9 28.93 10 15 2 213 -002 107 98 77 -7 -8 -8 000 74 31 14 -7.9 -8.1 28.95 10 15 358 209 -002 108 96 74 -8 -8 -8 000 75 31 15 -7.8 -8.0 28.97 10 15 355 206 -001 108102 78 -8 -8 -7 000 76 31 16 -7.4 -7.8 28.98 10 15 352 203 000 105101 84 -8 -7 -7 000 77 31 17 -7.3 -7.8 29.00 9 14 358 209 001 104101 83 -7 -8 -7 000 78 31 18 -7.0 -7.6 29.01 10 15 9 220 -001 103 99 82 -7 -8 -8 000 79 31 19 -6.6 -7.3 29.02 10 16 7 218 000 101 94 83 -7 -7 -7 000 80 31 20 -6.5 -7.1 29.03 11 15 9 220 000 101 95 85 -7 -7 -7 000 81 31 21 -6.4 -7.1 29.05 10 14 5 216 000 100 89 89 -7 -7 -7 000 82 31 22 -6.3 -7.2 29.06 9 12 7 218 002 99 86 94 -7 -6 -6 000 83 31 23 -6.3 -7.2 29.08 8 10 9 220 000 98 84 97 -7 -6 -6 001 84 01 00 -6.4 -7.3 29.09 7 9 19 230 000 99 87 96 -7 -6 -7 000 85 01 01 -6.6 -7.5 29.09 7 9 26 237 000 99 87 93 -6 -6 -7 000 86 01 02 -6.8 -7.6 29.09 6 9 33 244 000 100 86 89 -6 -6 -7 000 87 01 03 -6.9 -7.7 29.09 6 10 38 249 000 100 87 90 -6 -6 -7 000 88 01 04 -7.3 -7.9 29.09 7 11 43 254 000 103 87 89 -6 -6 -7 000 89 01 05 -7.9 -8.2 29.10 8 14 48 259 000 107 85 88 -5 -6 -7 000 90 01 06 -8.9 -9.1 29.10 9 16 52 263 001 108 84 85 -5 -6 -7 000 91 01 07 -9.5 -9.8 29.10 9 17 52 263 000 109 83 81 -5 -6 -6 000 92 01 08 -9.5 -9.8 29.10 10 18 52 263 001 109 80 77 -5 -6 -6 000 93 01 09 -9.6 -9.9 29.10 10 17 53 264 001 109 77 79 -5 -5 -6 000 94 01 10 -10.1 -10.4 29.10 9 17 56 267 001 109 70 81 -5 -5 -6 000 95 01 11 -10.1 -10.4 29.10 10 17 56 267 000 109 66 79 -5 -5 -5 000 96 01 12 -10.1 -10.4 29.10 10 17 56 267 001 109 66 75 -5 -5 -5 000 97 01 13 -10.0 -10.3 29.09 9 16 54 265 000 109 68 73 -5 -5 -5 000 98 01 14 -9.6 -9.9 29.08 9 16 46 257 -001 109 71 73 -5 -5 -5 000 99 01 15 -9.6 -9.9 29.07 9 16 48 259 000 109 69 76 -5 -5 -5 000 100 01 16 -8.5 -9.5 29.06 10 16 44 255 000 100 65 96 -5 -5 -5 000 101 01 17 -7.3 -9.5 29.06 10 16 41 252 001 88 84 90 -5 -5 -5 000 102 01 18 -6.7 -9.0 29.05 9 12 39 250 004 86100 85 -5 -5 -5 000 103 01 19 -6.2 -7.7 29.04 8 11 42 253 -001 93 97 90 -5 -5 -4 000 104 01 20 -5.6 -6.7 29.04 8 12 35 246 -002 96102 89 -5 -5 -4 000 105 01 21 -4.7 -5.5 29.03 8 13 42 253 000 98 90 92 -4 -3 -3 000 106 01 22 -4.2 -5.0 29.03 6 11 38 249 001 98 94 95 -4 -4 -3 000 107 01 23 -4.1 -4.9 29.02 7 11 50 261 -002 96 86 94 -3 -3 -3 000 108 02 00 -3.6 -5.4 29.00 9 12 51 262 -002 88 80 87 -3 -2 -3 000 109 02 01 -3.7 -5.9 28.98 9 13 48 259 002 85 83 85 -2 -3 -3 000 110 02 02 -4.8 -6.8 28.97 9 14 53 264 000 87 82 85 -2 -2 -3 000 111 02 03 -5.4 -7.3 28.95 9 15 53 264 -001 87 77 84 -2 -2 -3 000 112 02 04 -5.6 -7.2 28.94 9 15 52 263 000 91 71 83 -2 -2 -2 000 113 02 05 -5.8 -6.9 28.92 9 14 51 262 002 96 73 85 -2 -2 -2 000 114 02 06 -5.9 -7.1 28.90 9 13 49 260 002 95 74 88 -1 -2 -2 000 115 02 07 -6.3 -7.6 28.89 9 12 49 260 002 93 72 88 -1 -2 -2 000 116 02 08 -6.8 -8.5 28.88 8 11 52 263 000 89 69 91 -1 -1 -2 000 117 02 09 -7.1 -8.7 28.87 8 10 52 263 002 90 64 93 -1 -1 -2 000 118 02 10 -7.2 -8.6 28.86 7 8 57 268 001 91 64 95 -1 -1 -3 000 119 02 11 -6.9 -8.4 28.85 7 7 59 270 001 91 64 97 0 -1 -3 000 120 02 12 -6.7 -8.3 28.84 7 8 65 276 000 90 66 96 0 -1 -3 000 * 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.