USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-29/00 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 29 00 -17.0 -20.1 28.76 1 1 208 59 000 76 60 39 -15-15-14 000 1 29 01 -16.8 -20.1 28.76 1 1 182 33 000 83 60 39 -15-15-14 000 2 29 02 -16.9 -20.4 28.76 1 1 129 340 000 85 57 37 -15-14-14 000 3 29 03 -17.0 -20.7 28.74 1 1 82 293 000 84 56 35 -14-14-14 000 4 29 04 -17.2 -21.1 28.74 3 3 50 261 000 83 56 35 -14-14-14 000 5 29 05 -18.2 -21.6 28.73 4 4 32 243 000 84 55 34 -14-14-14 000 6 29 06 -18.9 -22.0 28.73 5 6 22 233 000 88 53 33 -14-14-14 000 7 29 07 -19.1 -22.1 28.71 4 5 13 224 000 90 50 32 -14-14-14 000 8 29 08 -18.6 -21.9 28.71 3 3 12 223 000 88 49 32 -14-14-14 000 9 29 09 -18.4 -22.0 28.71 2 2 20 231 000 84 48 32 -14-13-13 000 10 29 10 -18.4 -22.1 28.72 2 2 39 250 000 84 46 31 -14-13-13 000 11 29 11 -18.8 -22.2 28.68 4 4 37 248 000 86 45 32 -14-13-13 000 12 29 12 -19.5 -22.7 28.68 5 6 44 255 000 87 43 32 -13-13-13 000 13 29 13 -19.9 -22.9 28.68 6 7 45 256 000 88 42 32 -13-13-13 000 14 29 14 -19.6 -22.8 28.68 7 8 45 256 000 87 41 32 -12-13-13 000 15 29 15 -19.1 -22.5 28.68 8 9 46 257 000 84 40 32 -12-12-12 000 16 29 16 -18.3 -22.0 28.69 8 10 45 256 000 80 38 33 -12-12-12 000 17 29 17 -17.5 -21.6 28.68 8 10 45 256 000 76 37 34 -12-12-12 000 18 29 18 -16.7 -21.1 28.67 7 10 49 260 000 73 35 35 -11-11-12 000 19 29 19 -15.8 -20.4 28.66 7 9 53 264 000 71 34 34 -11-11-11 000 20 29 20 -15.0 -19.7 28.67 7 10 52 263 000 70 33 33 -10-11-11 000 21 29 21 -14.3 -19.1 28.67 7 10 52 263 000 69 33 33 -10-10-11 000 22 29 22 -13.7 -18.6 28.66 7 11 50 261 000 68 33 33 -10-10-10 000 23 29 23 -13.3 -18.2 28.65 7 11 48 259 000 68 33 33 -10-10-10 000 24 30 00 -13.0 -18.1 28.65 7 11 49 260 000 66 31 33 -9 -9-10 000 25 30 01 -12.9 -17.7 28.66 7 11 50 261 000 67 29 39 -9 -9-10 000 26 30 02 -12.8 -16.6 28.66 7 11 53 264 000 75 38 46 -9 -9-10 000 27 30 03 -12.7 -15.8 28.67 8 12 53 264 000 82 55 48 -8 -9 -9 000 28 30 04 -12.8 -15.8 28.67 8 12 55 266 000 85 63 48 -8 -9 -9 000 29 30 05 -13.0 -15.7 28.66 8 12 58 269 000 86 62 59 -8 -8 -9 000 30 30 06 -13.1 -16.2 28.66 9 13 60 271 000 82 60 65 -8 -8 -9 000 31 30 07 -13.3 -17.0 28.66 9 12 59 270 000 76 64 67 -7 -8 -9 000 32 30 08 -13.4 -17.5 28.66 9 12 56 267 000 72 67 70 -7 -8 -9 000 33 30 09 -13.3 -15.5 28.67 8 11 52 263 000 90 73 73 -8 -8 -9 000 34 30 10 -12.6 -13.7 28.67 7 10 54 265 000 105 73 76 -8 -8 -9 000 35 30 11 -12.4 -13.7 28.67 7 10 56 267 000 100 77 78 -8 -8 -8 000 36 30 12 -12.0 -13.4 28.67 7 10 57 268 000 100 76 81 -8 -8 -8 000 37 30 13 -11.8 -13.3 28.68 7 9 52 263 000 98 76 85 -8 -8 -8 000 38 30 14 -11.3 -12.9 28.68 6 9 46 257 000 97 77 89 -7 -7 -8 000 39 30 15 -10.6 -12.3 28.69 6 9 38 249 000 96 82 95 -7 -8 -9 000 40 30 16 -9.9 -11.4 28.69 5 8 27 238 -001 97 88 98 -7 -8 -9 001 41 30 17 -9.3 -10.6 28.70 5 8 13 224 000 98 92 98 -8 -8 -9 003 42 30 18 -8.6 -9.8 28.71 5 8 1 212 000 98 94 98 -8 -8 -9 004 43 30 19 -8.2 -9.4 28.71 5 7 350 201 000 98 95 98 -7 -8 -9 004 44 30 20 -7.8 -9.0 28.72 5 7 339 190 000 97 96 99 -7 -8 -8 003 45 30 21 -7.4 -8.6 28.73 4 6 329 180 000 97 95100 -7 -8 -8 002 46 30 22 -6.8 -8.0 28.75 4 8 320 171 000 96 97101 -7 -8 -8 002 47 30 23 -6.2 -7.5 28.76 4 7 311 162 000 95 99101 -7 -8 -8 004 48 31 00 -6.1 -7.4 28.76 4 9 322 173 000 95102102 -7 -8 -8 005 49 31 01 -6.1 -7.3 28.77 4 9 338 189 000 96102102 -7 -8 -8 006 50 31 02 -6.3 -7.4 28.78 5 9 346 197 000 97103101 -7 -8 -8 007 51 31 03 -6.7 -7.5 28.79 6 9 359 210 000 100101101 -7 -8 -8 005 52 31 04 -7.2 -7.9 28.80 6 9 7 218 000 102 99105 -7 -8 -8 004 53 31 05 -7.8 -8.2 28.82 6 10 8 219 000 107102103 -7 -8 -8 003 54 31 06 -8.7 -9.0 28.82 6 10 3 214 000 108104100 -7 -8 -8 002 55 31 07 -8.4 -8.6 28.83 6 11 3 214 000 108100 94 -7 -8 -9 001 56 31 08 -8.1 -8.2 28.84 7 12 357 208 000 108109 94 -7 -9 -9 000 57 31 09 -8.1 -8.2 28.86 7 12 0 211 000 108109101 -7 -9 -9 000 58 31 10 -7.9 -8.1 28.87 8 13 6 217 000 107109 98 -7 -9 -8 002 59 31 11 -7.3 -7.4 28.88 10 15 2 213 000 107109 91 -8 -9 -9 002 60 31 12 -7.1 -7.2 28.89 11 17 0 211 002 107109 84 -7 -9-10 001 61 31 13 -6.9 -7.2 28.90 14 20 5 216 002 105108 84 -7 -8 -9 000 62 31 14 -7.4 -7.5 28.92 15 21 4 215 002 107108 83 -7 -8 -9 000 63 31 15 -7.9 -8.0 28.93 13 20 7 218 002 108101 82 -7 -8 -8 000 64 31 16 -8.4 -8.6 28.94 13 21 9 220 001 108 96 80 -8 -8 -8 000 65 31 17 -8.1 -8.2 28.95 12 19 4 215 002 108 98 78 -8 -8 -8 000 66 31 18 -8.6 -8.8 28.96 12 18 358 209 002 108 96 81 -8 -8 -7 000 67 31 19 -8.6 -8.8 28.97 12 18 0 211 001 108 94 87 -8 -8 -7 000 68 31 20 -8.3 -8.5 28.98 12 17 356 207 000 107 98 89 -8 -8 -7 000 69 31 21 -7.9 -8.1 29.00 11 15 350 201 000 107 98 90 -9 -8 -8 000 70 31 22 -7.6 -8.0 29.02 10 13 348 199 000 105 97 89 -8 -8 -8 000 71 31 23 -7.7 -8.4 29.03 8 11 354 205 000 102 96 90 -8 -8 -8 000 72 01 00 -7.7 -8.5 29.04 7 10 0 211 000 101 91 94 -7 -7 -8 000 73 01 01 -7.7 -8.5 29.05 6 7 5 216 001 101 92 94 -7 -7 -8 000 74 01 02 -8.0 -8.6 29.05 6 7 17 228 000 104 92 96 -7 -7 -8 000 75 01 03 -8.5 -8.8 29.05 6 8 23 234 000 107 92 98 -6 -7 -8 000 76 01 04 -9.1 -9.4 29.06 6 8 27 238 000 109 90101 -6 -7 -8 000 77 01 05 -9.6 -10.0 29.06 6 9 37 248 000 108 88 97 -6 -7 -8 000 78 01 06 -9.9 -10.5 29.07 7 9 43 254 000 107 89 91 -6 -7 -8 000 79 01 07 -10.3 -10.6 29.07 7 10 52 263 000 109 85 86 -6 -7 -8 000 80 01 08 -11.1 -11.5 29.08 7 12 51 262 000 111 83 82 -6 -7 -8 000 81 01 09 -11.9 -12.3 29.08 7 12 46 257 001 112 85 85 -5 -7 -7 000 82 01 10 -12.3 -12.7 29.09 8 13 43 254 002 112 81 80 -5 -6 -7 000 83 01 11 -12.0 -12.3 29.09 8 13 45 256 002 111 74 83 -5 -6 -7 000 84 01 12 -11.4 -11.7 29.09 8 13 47 258 002 111 68 92 -5 -6 -7 000 85 01 13 -10.7 -11.1 29.08 9 14 46 257 002 110 70 97 -5 -6 -7 000 86 01 14 -10.4 -10.7 29.09 9 15 45 256 001 110 75 96 -5 -6 -7 000 87 01 15 -10.0 -10.3 29.09 9 16 44 255 001 109 77 96 -5 -6 -7 000 88 01 16 -9.5 -9.9 29.08 10 17 46 257 003 107 74104 -5 -6 -6 000 89 01 17 -8.9 -9.6 29.08 10 17 49 260 000 103 72 97 -5 -5 -6 000 90 01 18 -8.2 -9.4 29.07 10 17 49 260 000 98 71 96 -5 -5 -6 000 91 01 19 -7.7 -9.4 29.07 9 16 44 255 001 92 71 95 -5 -5 -5 000 92 01 20 -7.1 -9.2 29.06 10 16 41 252 001 88 72 94 -4 -5 -5 000 93 01 21 -6.7 -8.9 29.06 9 15 43 254 000 87 75 94 -4 -5 -5 000 94 01 22 -6.3 -8.6 29.06 9 14 44 255 000 85 76 93 -4 -4 -5 000 95 01 23 -6.0 -8.5 29.05 9 14 45 256 002 84 76 90 -4 -4 -4 000 96 02 00 -5.9 -8.5 29.04 9 14 49 260 000 82 72 85 -4 -4 -4 000 97 02 01 -5.9 -8.6 29.02 9 15 48 259 000 81 71 80 -3 -3 -3 000 98 02 02 -6.1 -8.9 29.01 9 16 50 261 000 80 70 77 -3 -3 -3 000 99 02 03 -6.5 -9.3 28.99 10 16 52 263 000 80 70 75 -3 -3 -3 000 100 02 04 -7.0 -9.9 28.98 9 16 52 263 000 80 73 76 -3 -3 -3 000 101 02 05 -7.4 -10.4 28.97 10 16 52 263 000 80 73 75 -3 -3 -3 000 102 02 06 -7.7 -10.6 28.96 9 16 53 264 -001 80 72 77 -2 -3 -2 000 103 02 07 -8.0 -10.9 28.94 9 15 55 266 000 80 70 75 -2 -2 -2 000 104 02 08 -7.9 -11.1 28.93 9 14 59 270 000 77 64 75 -2 -2 -2 000 105 02 09 -7.6 -11.2 28.92 9 13 55 267 000 74 62 76 -2 -2 -2 000 106 02 10 -7.8 -11.6 28.92 9 12 56 267 000 71 60 77 -2 -1 -2 000 107 02 11 -7.8 -11.6 28.91 9 12 56 267 000 71 64 80 -2 -2 -2 000 108 02 12 -7.7 -11.8 28.90 8 11 58 269 000 68 65 81 -2 -2 -2 000 109 02 13 -7.5 -11.6 28.89 8 11 60 271 000 67 67 81 -2 -1 -2 000 110 02 14 -6.9 -11.0 28.88 8 11 61 272 000 67 69 83 -2 -2 -3 000 111 02 15 -6.6 -10.7 28.87 8 11 59 270 000 67 71 87 -2 -2 -3 000 112 02 16 -6.4 -10.5 28.86 8 11 56 267 001 67 72 89 -2 -2 -3 000 113 02 17 -6.1 -10.2 28.86 7 11 60 271 000 68 71 88 -2 -2 -3 000 114 02 18 -5.6 -9.6 28.85 7 10 57 268 000 68 68 87 -2 -2 -3 000 115 02 19 -5.0 -9.0 28.85 6 10 60 271 000 67 67 86 -2 -2 -3 000 116 02 20 -4.4 -8.3 28.85 6 9 62 273 000 68 68 85 -2 -2 -3 000 117 02 21 -4.1 -8.0 28.85 5 8 65 276 000 66 68 84 -2 -2 -3 000 118 02 22 -3.6 -7.5 28.84 5 7 66 277 000 66 66 82 -2 -2 -3 000 119 02 23 -3.2 -7.0 28.84 4 7 72 283 000 66 65 81 -1 -2 -3 000 120 03 00 -2.9 -6.4 28.83 4 7 82 293 000 70 64 80 -2 -2 -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.