USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-09-22/00 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 22 00 -30.3 -33.5 28.84 5 6 53 264 000 99 99 98 -25-24-24 000 1 22 01 -31.3 -31.8 28.83 7 9 48 259 000 133 96 96 -24-24-24 000 2 22 02 -31.9 -32.3 28.83 8 10 58 269 000 133 95 96 -24-24-24 000 3 22 03 -32.0 -32.5 28.80 9 12 63 274 000 134 94 97 -24-23-24 000 4 22 04 -32.0 -32.5 28.79 10 13 65 276 001 134 95 99 -24-24-24 000 5 22 05 -32.1 -32.7 28.79 9 13 71 282 000 134 94 96 -23-23-24 000 6 22 06 -32.0 -32.6 28.80 9 13 75 286 000 134 93 92 -23-23-24 000 7 22 07 -31.7 -32.3 28.75 9 13 80 291 000 134 94 94 -23-23-24 000 8 22 08 -31.4 -32.0 28.74 10 14 83 294 000 133 93 94 -23-23-23 000 9 22 09 -31.3 -31.8 28.73 10 15 86 297 000 133 91 90 -23-23-23 000 10 22 10 -31.1 -31.7 28.71 10 16 84 295 000 133 88 88 -22-23-23 000 11 22 11 -31.1 -31.7 28.69 10 16 87 298 000 133 86 86 -22-22-23 000 12 22 12 -31.3 -32.2 28.67 10 17 91 302 000 127 84 84 -22-22-23 000 13 22 13 -31.4 -32.5 28.66 10 17 92 303 000 124 77 79 -22-22-23 000 14 22 14 -31.4 -32.3 28.65 10 17 98 309 001 127 67 77 -22-22-22 000 15 22 15 -31.2 -31.7 28.62 10 18 103 314 000 133 65 77 -22-22-22 000 16 22 16 -30.8 -31.8 28.60 10 18 106 317 -001 124 70 72 -22-22-22 000 17 22 17 -30.4 -32.2 28.59 10 18 108 319 000 113 70 65 -22-22-22 000 18 22 18 -30.0 -31.6 28.57 10 18 110 321 000 116 68 65 -22-21-22 000 19 22 19 -29.8 -31.2 28.56 10 18 114 325 000 118 63 65 -21-21-21 000 20 22 20 -29.8 -31.4 28.54 9 16 115 326 001 115 58 61 -21-21-21 000 21 22 21 -29.7 -32.0 28.52 8 14 112 323 002 105 55 57 -20-21-21 000 22 22 22 -29.4 -32.5 28.50 8 13 112 323 002 94 53 55 -20-20-21 000 23 22 23 -29.3 -32.6 28.48 8 12 113 324 002 91 51 51 -20-20-21 000 24 23 00 -29.1 -32.5 28.47 7 12 109 320 003 89 50 48 -20-20-21 000 25 23 01 -28.9 -32.4 28.46 8 11 105 316 002 88 49 45 -20-20-20 000 26 23 02 -28.9 -32.3 28.45 8 11 96 307 001 89 48 51 -20-20-20 000 27 23 03 -28.8 -32.0 28.44 8 11 93 304 000 91 46 60 -19-20-20 000 28 23 04 -28.9 -31.4 28.42 8 10 90 301 001 97 46 61 -19-19-20 000 29 23 05 -28.6 -31.1 28.41 7 9 93 304 000 98 50 59 -19-19-20 000 30 23 06 -28.1 -30.9 28.41 7 8 91 302 000 95 57 61 -19-20-20 000 31 23 07 -27.4 -30.7 28.40 6 8 101 312 -001 89 61 60 -19-20-20 000 32 23 08 -26.3 -30.3 28.39 6 7 97 308 000 84 61 59 -19-20-20 000 33 23 09 -26.0 -29.8 28.38 5 6 98 309 001 85 62 59 -19-20-20 000 34 23 10 -26.0 -29.3 28.37 4 5 94 305 000 90 63 60 -19-20-21 000 35 23 11 -26.5 -29.0 28.38 4 4 87 298 002 98 65 61 -20-20-20 000 36 23 12 -27.2 -28.9 28.38 3 3 68 279 001 105 64 63 -19-20-20 000 37 23 13 -26.6 -29.3 28.38 3 3 39 250 000 94 65 62 -19-20-21 000 38 23 14 -25.5 -29.3 28.38 3 3 13 224 000 84 65 60 -19-20-21 000 39 23 15 -25.4 -28.9 28.38 3 3 2 213 000 86 64 58 -19-20-20 000 40 23 16 -25.4 -28.7 28.38 4 4 0 211 000 88 62 57 -19-20-20 000 41 23 17 -25.2 -29.0 28.39 5 5 5 216 000 84 60 56 -20-20-20 000 42 23 18 -25.2 -29.3 28.40 5 5 8 219 001 82 57 55 -19-20-20 000 43 23 19 -25.2 -29.5 28.41 5 6 12 223 001 81 57 54 -19-19-20 000 44 23 20 -25.8 -30.0 28.41 6 7 21 232 000 81 57 51 -19-19-20 000 45 23 21 -26.9 -30.6 28.42 7 9 30 241 000 84 55 45 -19-19-20 000 46 23 22 -27.2 -30.7 28.43 7 9 36 247 000 87 53 44 -19-19-20 000 47 23 23 -27.3 -31.0 28.44 7 9 41 252 000 85 39 41 -19-19-19 000 48 24 00 -27.4 -31.4 28.46 8 10 46 257 001 81 38 32 -19-18-19 000 49 24 01 -27.1 -31.2 28.47 8 9 52 263 001 80 35 40 -18-18-19 000 50 24 02 -27.0 -30.5 28.48 8 9 56 267 003 85 29 57 -17-18-18 000 51 24 03 -26.3 -30.7 28.49 8 9 58 269 001 76 25 61 -17-17-18 000 52 24 04 -26.5 -31.1 28.51 9 11 58 269 002 73 28 78 -17-17-18 000 53 24 05 -26.0 -31.5 28.52 9 11 59 270 000 65 48 98 -16-17-17 000 54 24 06 -25.3 -31.8 28.54 9 11 59 270 000 55 62102 -16-17-17 000 55 24 07 -25.0 -32.2 28.55 9 11 60 271 000 51 66102 -16-16-17 000 56 24 08 -24.6 -32.0 28.57 9 11 61 272 000 48 66101 -16-16-17 000 57 24 09 -24.4 -31.8 28.58 9 11 63 274 000 49 64 98 -15-16-16 000 58 24 10 -24.0 -31.1 28.59 8 10 66 277 000 53 57 93 -15-16-16 000 59 24 11 -23.3 -30.4 28.61 7 8 70 281 003 54 51 94 -15-15-16 000 60 24 12 -23.1 -29.8 28.63 7 8 75 286 001 58 49 95 -15-16-16 000 61 24 13 -22.2 -29.3 28.64 6 6 77 288 000 57 48 91 -15-15-16 000 62 24 14 -22.6 -29.3 28.66 6 7 85 296 000 60 47 87 -14-15-16 000 63 24 15 -21.9 -28.8 28.66 6 7 100 311 000 60 46 85 -14-15-16 000 64 24 16 -21.4 -28.3 28.67 6 8 111 322 001 59 45 88 -14-15-16 000 65 24 17 -21.2 -28.5 28.67 5 9 120 331 001 58 45 93 -14-15-16 000 66 24 18 -21.2 -29.4 28.67 6 9 129 340 000 51 45 87 -14-15-16 000 67 24 19 -20.7 -30.6 28.68 5 10 143 354 000 45 43 80 -15-15-16 000 68 24 20 -20.9 -32.3 28.68 5 11 160 11 -001 37 43 75 -15-15-16 000 69 24 21 -21.5 -32.7 28.68 5 11 176 27 000 36 42 65 -15-15-16 000 70 24 22 -21.8 -31.1 28.68 6 11 188 39 000 44 44 64 -15-15-15 000 71 24 23 -22.5 -29.7 28.67 6 12 203 54 000 55 49 61 -15-15-15 000 72 25 00 -22.6 -27.9 28.67 7 14 212 63 001 67 53 60 -15-14-15 000 73 25 01 -22.9 -26.9 28.66 8 15 217 68 000 79 58 64 -15-14-15 000 74 25 02 -22.8 -26.3 28.65 8 15 225 76 000 86 62 67 -15-14-15 000 75 25 03 -24.2 -27.2 28.64 9 15 233 84 -001 91 63 63 -15-14-14 000 76 25 04 -24.2 -26.6 28.62 9 15 236 87 -002 98 58 66 -15-14-14 000 77 25 05 -24.8 -26.4 28.61 9 14 243 94 -002 107 53 70 -14-14-14 000 78 25 06 -25.3 -26.1 28.60 10 15 245 96 000 120 55 72 -15-14-15 000 79 25 07 -26.2 -26.7 28.59 9 13 250 101 002 126 70 66 -15-14-14 000 80 25 08 -26.0 -26.3 28.57 8 12 252 103 001 126 60 62 -14-14-14 000 81 25 09 -25.3 -25.4 28.56 7 11 247 98 001 125 51 63 -15-14-14 000 82 25 10 -24.4 -24.4 28.55 5 9 235 86 000 125 47 60 -14-13-14 000 83 25 11 -24.7 -24.7 28.54 2 5 288 139 001 125 50 54 -15-14-14 000 84 25 12 -23.9 -23.9 28.54 4 5 267 118 000 124 52 48 -15-14-14 000 85 25 13 -25.6 -25.7 28.53 6 8 260 112 001 126 53 51 -15-14-14 000 86 25 14 -27.3 -27.7 28.52 8 10 254 105 000 127 54 53 -15-14-14 000 87 25 15 -28.4 -28.9 28.52 8 12 256 107 000 129 56 54 -15-14-15 000 88 25 16 -28.9 -30.6 28.52 8 12 264 115 000 112 56 57 -16-14-15 000 89 25 17 -29.3 -31.4 28.52 9 13 263 114 000 108 57 41 -16-15-15 000 90 25 18 -29.8 -31.7 28.52 9 15 269 120 -002 114 58 19 -17-15-15 000 91 25 19 -30.2 -32.2 28.53 9 15 281 132 -002 114 59 28 -18-16-16 000 92 25 20 -29.8 -31.4 28.54 9 16 305 156 000 117 51 40 -19-16-16 000 93 25 21 -31.1 -32.5 28.55 11 18 331 182 000 122 54 33 -19-17-16 000 94 25 22 -32.7 -34.1 28.57 13 21 341 192 000 124 57 47 -20-17-16 000 95 25 23 -33.4 -34.9 28.58 13 23 348 199 000 124 56 35 -21-18-17 000 96 26 00 -34.0 -35.5 28.60 13 24 354 205 000 124 57 30 -22-19-17 000 97 26 01 -34.5 -36.1 28.62 13 25 359 210 000 124 59 29 -23-20-18 000 98 26 02 -35.3 -36.9 28.64 14 26 2 213 000 124 58 31 -23-20-18 000 99 26 03 -35.5 -37.1 28.65 14 27 6 217 000 124 59 31 -23-21-19 000 100 26 04 -36.3 -38.0 28.66 15 27 12 223 001 124 60 30 -24-22-19 000 101 26 05 -35.6 -37.2 28.68 15 27 13 224 000 124 63 30 -23-22-19 000 102 26 06 -35.4 -37.0 28.69 16 27 14 225 000 124 63 31 -24-21-19 000 103 26 07 -35.1 -36.7 28.71 16 27 13 224 -003 125 66 35 -26-21-19 001 104 26 08 -34.7 -35.9 28.72 15 25 15 226 -003 128 68 43 -25-22-19 000 105 26 09 -34.2 -35.2 28.73 15 23 16 227 -001 132 67 50 -25-21-19 000 106 26 10 -33.6 -34.7 28.73 14 22 13 224 -003 130 61 72 -24-20-18 000 107 26 11 -33.3 -33.9 28.75 14 21 18 229 -005 137 68 45 -23-20-18 000 108 26 12 -32.6 -33.1 28.75 13 21 24 235 -002 136 57 40 -22-19-18 000 109 26 13 -31.9 -32.5 28.76 14 23 25 236 000 136 54 28 -22-19-18 000 110 26 14 -31.5 -32.1 28.76 15 23 27 238 000 135 44 24 -22-19-17 000 111 26 15 -32.3 -32.8 28.76 14 21 27 238 -001 136 35 24 -22-18-17 000 112 26 16 -31.9 -32.5 28.76 13 19 22 233 -003 136 34 26 -21-17-17 000 113 26 17 -31.0 -31.6 28.76 13 19 21 232 -001 134 27 30 -20-17-17 000 114 26 18 -30.2 -30.7 28.76 12 18 21 232 000 133 26 32 -20-17-16 000 115 26 19 -28.9 -29.5 28.76 12 17 20 231 004 132 25 33 -19-17-16 000 116 26 20 -28.4 -29.0 28.75 11 15 22 233 007 131 23 32 -18-16-16 000 117 26 21 -28.0 -28.6 28.75 10 14 25 236 004 130 24 34 -18-16-16 000 118 26 22 -27.7 -28.4 28.74 8 11 36 247 -004 129 26 37 -18-17-17 000 119 26 23 -27.3 -28.8 28.74 7 7 42 253 000 113 28 39 -18-17-18 000 120 27 00 -24.8 -28.3 28.73 4 4 38 249 000 90 31 38 -17-18-19 000 * 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.