USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-10-17/12 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 17 12 -15.0 -20.0 28.22 10 12 89 300 000 59 42 40 -9 -7 -8 000 1 17 13 -17.7 -19.9 28.21 9 14 86 297 -001 94 48 49 -9 -8 -8 000 2 17 14 -18.1 -20.3 28.20 9 16 87 298 -002 96 46 53 -8 -8 -9 000 3 17 15 -17.6 -20.1 28.18 10 18 83 294 000 92 44 52 -9 -8 -9 000 4 17 16 -17.7 -20.5 28.18 9 17 77 288 000 89 45 53 -9 -8 -9 000 5 17 17 -17.7 -20.6 28.18 9 16 76 288 001 89 47 54 -9 -9 -9 000 6 17 18 -17.2 -20.3 28.17 9 16 76 287 001 86 50 54 -9 -9-10 000 7 17 19 -16.4 -19.8 28.18 8 15 75 286 001 82 50 55 -8 -9 -9 000 8 17 20 -15.9 -19.4 28.16 9 16 64 275 000 82 53 58 -9 -9-10 000 9 17 21 -16.1 -19.4 28.16 8 14 57 268 000 83 55 54 -10-10-10 000 10 17 22 -17.0 -19.3 28.15 10 16 49 260 -004 97 58 52 -12-11-10 000 11 17 23 -17.5 -19.3 28.18 11 17 45 256 000 102 55 52 -12-10-10 000 12 18 00 -17.8 -19.8 28.18 11 17 47 258 -003 100 56 53 -11-10-10 000 13 18 01 -17.6 -20.3 28.20 12 19 52 263 -002 92 53 51 -12-10-10 000 14 18 02 -17.8 -20.8 28.22 12 19 53 264 -004 90 48 46 -12-10 -9 000 15 18 03 -17.9 -21.0 28.24 14 22 53 264 -002 89 50 47 -12-10 -9 000 16 18 04 -17.4 -20.6 28.25 16 25 54 265 -001 88 50 51 -11-10 -9 000 17 18 05 -17.3 -19.9 28.28 17 28 60 271 003 93 42 50 -10 -9 -9 000 18 18 06 -16.8 -18.5 28.28 19 31 63 274 008 102 39 53 -11 -8 -8 000 19 18 07 -16.0 -17.0 28.29 20 31 63 274 011 108 35 52 -10 -9 -9 000 20 18 08 -15.5 -16.5 28.31 20 33 64 275 017 108 43 48 -11-10 -9 000 21 18 09 -16.4 -16.8 28.33 20 33 66 277 013 116 45 51 -11-10-10 000 22 18 10 -16.9 -17.2 28.35 19 31 63 274 016 117 40 54 -11 -9 -9 000 23 18 11 -17.3 -17.6 28.36 19 30 62 273 013 117 43 65 -11-10-10 000 24 18 12 -17.6 -18.0 28.38 19 30 63 274 015 118 54 77 -11-10-10 000 25 18 13 -17.9 -18.3 28.40 17 28 64 275 013 118 83 79 -11-11-10 000 26 18 14 -17.8 -18.2 28.42 18 28 63 274 016 118 84 72 -11-10-10 000 27 18 15 -17.9 -18.8 28.44 17 28 62 273 014 112 81 69 -10 -9-10 000 28 18 16 -17.7 -19.2 28.43 17 28 65 276 015 106 76 64 -9 -9-10 000 29 18 17 -17.4 -19.3 28.43 16 28 67 278 010 100 72 65 -9-10-10 000 30 18 18 -16.8 -19.3 28.43 16 26 70 281 010 94 70 60 -9-10-10 000 31 18 19 -16.4 -20.0 28.44 15 25 71 282 011 83 65 59 -9-10-10 000 32 18 20 -16.1 -20.2 28.44 14 24 70 281 008 78 56 54 -9 -9-10 000 33 18 21 -16.1 -20.4 28.44 14 23 72 283 002 76 45 51 -9 -9-10 000 34 18 22 -16.0 -19.8 28.44 14 23 74 285 002 81 38 37 -9 -9-10 000 35 18 23 -15.8 -18.7 28.43 13 22 79 290 002 89 31 36 -9 -9 -9 000 36 19 00 -15.5 -18.5 28.42 12 22 79 290 001 87 35 41 -8 -8 -9 000 37 19 01 -14.8 -18.6 28.40 13 24 84 295 -002 79 33 39 -7 -8 -9 000 38 19 02 -15.1 -18.3 28.39 14 24 88 299 001 85 36 37 -7 -8 -9 000 39 19 03 -15.3 -18.2 28.39 14 24 87 298 001 89 42 40 -8 -9 -9 000 40 19 04 -15.6 -18.3 28.37 12 23 83 294 000 90 41 43 -9 -8 -9 000 41 19 05 -16.1 -18.5 28.35 11 21 79 290 000 92 44 51 -9 -8 -9 000 42 19 06 -16.5 -18.4 28.34 12 21 78 289 -002 99 45 51 -9 -9 -9 000 43 19 07 -17.0 -18.5 28.33 11 21 77 288 -001 103 44 50 -9 -9-10 000 44 19 08 -17.1 -18.9 28.32 11 20 74 285 000 99 43 51 -9 -9-10 000 45 19 09 -17.3 -19.1 28.31 11 19 73 284 000 99 43 48 -9 -9 -9 000 46 19 10 -17.3 -19.3 28.30 11 18 76 287 000 97 42 46 -9-10-10 000 47 19 11 -17.5 -19.5 28.30 10 17 83 294 000 97 42 52 -9-10-10 000 48 19 12 -17.4 -19.3 28.29 10 17 83 294 000 97 43 53 -9-10-10 000 49 19 13 -17.1 -19.2 28.29 10 17 81 292 000 96 44 49 -9 -9-10 000 50 19 14 -17.0 -19.2 28.29 10 16 75 286 -001 95 44 44 -9 -9-10 000 51 19 15 -17.4 -19.3 28.29 10 17 69 280 001 98 43 39 -9 -9 -9 000 52 19 16 -17.6 -19.6 28.29 10 16 61 272 000 99 39 40 -9 -9 -8 000 53 19 17 -17.4 -19.6 28.30 9 13 55 266 -002 96 36 32 -9 -8 -8 000 54 19 18 -16.8 -19.6 28.30 7 9 51 262 -001 87 36 27 -8 -7 -8 000 55 19 19 -15.9 -19.3 28.30 6 6 56 267 000 81 35 31 -8 -7 -8 000 56 19 20 -16.3 -20.1 28.31 8 10 71 282 004 78 36 43 -8 -8 -8 000 57 19 21 -15.4 -20.2 28.32 7 9 78 289 006 65 36 50 -8 -8 -8 000 58 19 22 -14.9 -19.7 28.33 7 9 77 289 003 65 31 51 -7 -7 -8 000 59 19 23 -15.2 -19.2 28.34 7 11 77 288 -001 74 35 45 -7 -7 -7 000 60 20 00 -15.1 -19.5 28.34 6 9 81 292 -002 69 39 48 -8 -7 -7 000 61 20 01 -15.9 -20.0 28.35 7 13 67 278 000 74 40 44 -9 -7 -7 000 62 20 02 -16.8 -20.3 28.35 8 14 61 272 -002 81 40 41 -8 -8 -7 000 63 20 03 -17.6 -20.0 28.35 9 15 51 262 -003 95 41 41 -8 -8 -7 000 64 20 04 -19.3 -20.1 28.37 10 15 40 251 -003 115 44 41 -9 -8 -7 000 65 20 05 -20.5 -21.4 28.38 8 12 33 244 004 117 49 41 -11 -8 -7 000 66 20 06 -21.5 -22.1 28.38 8 14 45 256 001 122 48 39 -11 -8 -7 000 67 20 07 -23.1 -23.6 28.39 10 17 47 258 005 124 49 44 -10 -8 -7 000 68 20 08 -24.6 -25.1 28.41 12 18 41 252 006 127 51 50 -11 -9 -8 000 69 20 09 -24.4 -24.8 28.42 14 21 38 249 002 126 53 53 -13 -9 -8 000 70 20 10 -23.4 -23.9 28.43 16 24 42 253 -002 125 55 54 -13-11 -9 000 71 20 11 -22.2 -22.6 28.45 16 26 40 251 -002 123 52 58 -13-11-11 000 72 20 12 -21.9 -22.4 28.47 14 24 38 249 -002 123 51 57 -12-11-12 000 73 20 13 -22.2 -22.7 28.49 13 22 42 253 000 123 47 53 -12-11-11 000 74 20 14 -22.0 -22.5 28.50 12 20 44 255 -002 123 58 66 -12-11-11 000 75 20 15 -20.9 -21.4 28.51 11 17 43 254 -005 121 55 59 -12-11-11 000 76 20 16 -20.4 -20.9 28.53 10 16 53 264 000 121 69 29 -12-12-11 000 77 20 17 -19.3 -19.7 28.53 9 16 56 267 -002 120 68 28 -11-11-12 000 78 20 18 -17.7 -18.2 28.53 8 13 60 271 -003 117 47 28 -11-11-11 000 79 20 19 -16.5 -18.8 28.53 7 12 85 296 -003 92 36 32 -9-10-10 000 80 20 20 -15.4 -18.4 28.53 9 14 109 320 000 85 39 43 -10-10-10 000 81 20 21 -15.8 -18.8 28.52 8 15 111 322 000 86 42 50 -9 -9-10 000 82 20 22 -15.8 -19.9 28.51 9 18 89 300 000 75 41 48 -9 -9 -9 000 83 20 23 -15.7 -19.9 28.51 10 18 86 297 000 76 41 46 -9 -9-10 000 84 21 00 -16.0 -20.1 28.50 9 18 85 296 001 76 42 45 -9 -9-10 000 85 21 01 -15.9 -20.0 28.49 11 19 84 295 002 78 38 48 -9 -9 -9 000 86 21 02 -15.9 -19.3 28.47 10 20 83 294 004 83 37 70 -9 -9 -9 000 87 21 03 -16.6 -18.2 28.46 11 23 72 283 000 102 35 51 -9 -8 -9 000 88 21 04 -15.8 -17.6 28.45 12 23 77 288 -003 99 49 58 -9 -8 -8 000 89 21 05 -16.2 -18.1 28.44 9 18 60 271 003 98 58 63 -10 -8 -7 000 90 21 06 -16.7 -17.9 28.42 12 26 79 290 -004 106 50 52 -6 -6 -7 000 91 21 07 -15.2 -17.9 28.41 13 24 81 292 -001 89 47 45 -6 -6 -7 000 92 21 08 -15.4 -18.4 28.40 13 23 82 293 -002 87 36 44 -6 -6 -7 000 93 21 09 -16.4 -19.3 28.40 12 21 77 288 -002 88 36 43 -6 -6 -7 000 94 21 10 -17.1 -20.1 28.39 11 21 73 284 -002 87 37 43 -6 -6 -7 000 95 21 11 -17.3 -20.5 28.38 11 21 73 284 000 84 35 41 -6 -6 -6 000 96 21 12 -16.9 -20.7 28.37 11 22 77 288 000 78 33 42 -6 -6 -6 000 97 21 13 -16.7 -21.0 28.36 11 22 82 293 000 73 32 44 -6 -6 -6 000 98 21 14 -16.6 -21.3 28.35 12 22 81 292 001 71 30 44 -6 -6 -7 000 99 21 15 -16.7 -21.6 28.34 11 21 82 293 -002 68 31 45 -7 -6 -7 000 100 21 16 -16.3 -21.6 28.33 11 21 85 296 -001 66 33 45 -7 -6 -7 000 101 21 17 -15.6 -21.2 28.33 11 21 84 295 000 63 34 45 -7 -6 -7 000 102 21 18 -15.3 -20.8 28.32 10 20 82 293 -004 63 37 39 -7 -7 -8 000 103 21 19 -14.9 -20.4 28.32 10 20 82 293 000 62 36 29 -7 -7 -8 000 104 21 20 -14.4 -19.9 28.32 9 19 85 296 000 62 36 27 -8 -7 -8 000 105 21 21 -14.3 -19.6 28.32 9 18 83 294 -001 64 36 34 -8 -8 -8 000 106 21 22 -14.4 -19.5 28.32 9 18 79 290 000 65 38 43 -8 -8 -9 000 107 21 23 -14.7 -19.7 28.32 8 16 83 294 000 65 38 48 -9 -8 -9 000 108 22 00 -15.2 -20.0 28.32 7 15 87 298 -001 66 39 47 -9 -9 -9 000 109 22 01 -15.7 -20.6 28.32 6 14 87 298 000 65 40 43 -9 -9-10 000 110 22 02 -16.3 -21.4 28.32 6 12 79 290 -001 64 40 42 -9 -9-10 000 111 22 03 -17.0 -22.1 28.33 6 9 68 279 000 65 41 44 -9 -9-10 000 112 22 04 -18.4 -22.5 28.33 8 12 44 255 000 76 42 46 -10-10-10 000 113 22 05 -19.8 -22.6 28.34 8 11 35 246 001 92 42 46 -10-10-10 000 114 22 06 -21.0 -23.0 28.36 8 10 24 235 -002 101 43 47 -11-11-11 000 115 22 07 -22.0 -22.8 28.38 8 10 17 228 -003 119 44 48 -12-11-11 000 116 22 08 -23.4 -24.0 28.40 8 11 14 225 000 124 43 50 -13-12-11 000 117 22 09 -24.0 -24.6 28.41 9 13 10 221 000 125 43 50 -13-12-11 000 118 22 10 -26.1 -26.7 28.43 11 15 13 224 001 128 42 54 -13-12-11 000 119 22 11 -27.6 -28.1 28.46 13 18 12 223 001 130 41 58 -14-11-11 000 120 22 12 -27.1 -27.6 28.48 14 21 12 223 000 130 42 56 -17-12-12 000 * 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.