USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-09-28/00 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 28 00 -28.1 -31.6 28.71 7 10 46 258 -002 91 70 52 -23-20-19 000 1 28 01 -29.1 -30.9 28.73 9 12 49 260 -004 114 61 50 -21-19-18 000 2 28 02 -28.9 -31.1 28.75 9 13 60 271 -003 108 57 47 -20-19-18 000 3 28 03 -28.7 -31.3 28.74 10 14 60 271 -004 101 55 47 -20-19-18 000 4 28 04 -28.7 -31.8 28.73 10 15 63 274 -002 95 54 47 -20-18-17 000 5 28 05 -28.6 -32.3 28.77 10 15 65 276 -001 88 54 48 -19-18-17 000 6 28 06 -28.6 -32.6 28.77 10 14 62 273 000 83 54 48 -19-17-17 000 7 28 07 -28.4 -32.3 28.77 10 13 64 275 000 84 52 48 -18-17-16 000 8 28 08 -27.9 -31.6 28.76 9 12 64 275 002 85 50 49 -17-16-16 000 9 28 09 -26.6 -30.4 28.75 7 8 73 284 003 82 46 50 -16-15-15 000 10 28 10 -25.6 -29.6 28.75 7 8 90 301 007 80 45 50 -16-15-15 000 11 28 11 -26.0 -29.8 28.75 8 13 117 328 -001 82 43 47 -16-15-15 000 12 28 12 -26.8 -30.4 28.75 9 14 124 335 000 84 42 48 -15-14-15 000 13 28 13 -26.9 -30.8 28.74 9 15 130 341 000 81 42 45 -15-14-14 000 14 28 14 -26.2 -30.7 28.74 9 15 138 349 000 75 43 38 -15-14-14 000 15 28 15 -24.4 -29.6 28.73 9 15 145 356 -001 68 39 36 -14-13-13 000 16 28 16 -23.0 -28.5 28.73 8 15 159 10 -001 66 32 38 -15-13-13 000 17 28 17 -24.5 -29.4 28.72 9 15 167 18 002 71 33 32 -15-13-13 000 18 28 18 -25.1 -29.4 28.72 8 15 173 24 000 78 37 51 -15-13-13 000 19 28 19 -25.2 -29.1 28.72 8 14 179 30 000 82 40 86 -15-13-13 000 20 28 20 -24.8 -28.7 28.72 6 13 184 35 000 82 61 92 -14-13-13 000 21 28 21 -23.4 -28.1 28.72 6 12 173 24 -002 74 76 93 -14-12-13 000 22 28 22 -22.3 -28.0 28.72 5 10 167 18 000 65 88 89 -13-12-13 000 23 28 23 -20.8 -28.2 28.72 4 8 163 14 000 58 91 79 -13-13-14 000 24 29 00 -20.2 -27.9 28.73 3 7 148 359 000 57 95 77 -13-13-13 000 25 29 01 -19.6 -27.7 28.73 2 5 146 357 000 54 96 75 -13-13-13 000 26 29 02 -19.2 -27.4 28.73 2 5 177 28 000 54 93 71 -13-13-12 000 27 29 03 -19.9 -27.4 28.75 3 7 206 57 -001 58 91 68 -14-13-13 000 28 29 04 -21.2 -28.7 28.74 4 8 194 46 000 58 81 62 -13-13-13 000 29 29 05 -21.7 -29.2 28.74 4 8 169 20 000 59 70 59 -13-13-12 000 30 29 06 -21.3 -28.9 28.75 4 8 148 359 000 57 62 56 -13-12-11 000 31 29 07 -21.3 -27.7 28.76 5 10 145 356 000 57 62 48 -13-12-11 000 32 29 08 -22.2 -27.8 28.75 7 11 130 341 -002 63 56 64 -14-12-10 000 33 29 09 -23.7 -27.3 28.76 9 13 118 329 000 85 46 63 -14-12-11 000 34 29 10 -23.6 -26.3 28.76 9 15 92 303 -001 95 45 53 -13-11-10 000 35 29 11 -22.1 -23.0 28.76 11 18 77 288 000 116 41 47 -14-10-10 000 36 29 12 -22.7 -23.2 28.77 13 22 72 283 -004 124 41 39 -13-11-10 000 37 29 13 -23.7 -24.2 28.78 15 26 56 267 -003 125 35 27 -13 -9 -9 000 38 29 14 -23.1 -24.0 28.80 20 33 59 270 -001 119 42 32 -14 -9 -9 000 39 29 15 -23.4 -25.1 28.81 19 32 53 264 000 109 35 33 -14 -9 -9 000 40 29 16 -24.1 -25.0 28.82 17 27 54 265 008 120 29 14 -13-10-10 000 41 29 17 -23.5 -25.2 28.83 16 25 63 274 006 110 30 21 -13-10-10 000 42 29 18 -23.6 -25.7 28.84 14 23 62 273 000 104 27 29 -14 -9-10 000 43 29 19 -23.1 -25.5 28.85 16 26 71 282 011 100 25 25 -11 -9-11 000 44 29 20 -21.9 -24.7 28.84 16 25 75 286 002 94 31 35 -10-10-10 000 45 29 21 -21.4 -24.2 28.85 16 26 74 285 001 95 37 40 -12-11-10 000 46 29 22 -20.7 -23.9 28.84 18 32 72 283 006 91 33 45 -13 -9 -9 000 47 29 23 -19.4 -22.8 28.83 21 33 70 281 013 87 30 35 -12 -9 -8 000 48 30 00 -18.9 -22.3 28.82 20 33 70 281 004 87 31 36 -11 -9 -8 000 49 30 01 -18.6 -21.7 28.82 17 31 72 283 -004 89 34 47 -14 -9 -8 000 50 30 02 -16.9 -20.4 28.81 20 34 73 285 -003 85 39 52 -13 -8 -8 000 51 30 03 -16.1 -19.3 28.80 19 32 76 287 -006 86 37 39 -13 -9 -8 000 52 30 04 -16.2 -19.5 28.79 20 32 76 287 -002 85 37 38 -13 -9 -9 000 53 30 05 -16.6 -19.8 28.78 19 32 73 284 000 87 41 42 -13-11 -9 000 54 30 06 -17.1 -20.0 28.77 20 33 73 284 006 90 40 36 -12-10 -9 000 55 30 07 -17.8 -20.5 28.76 19 33 69 280 002 93 42 47 -13 -9 -8 000 56 30 08 -18.3 -20.6 28.74 17 30 66 277 004 97 44 44 -12 -9 -8 000 57 30 09 -18.9 -20.6 28.73 16 30 71 282 -001 103 45 45 -12-10 -9 000 58 30 10 -19.0 -20.7 28.73 17 27 76 287 000 103 48 50 -11-10 -9 000 59 30 11 -19.7 -21.2 28.72 14 25 76 287 -003 107 48 62 -10 -9 -9 000 60 30 12 -20.5 -21.5 28.72 14 24 68 279 -005 114 51 62 -11-10-10 000 61 30 13 -20.5 -21.6 28.71 13 23 80 291 000 112 53 69 -10 -9 -9 000 62 30 14 -19.5 -21.4 28.69 13 24 80 291 -003 101 52 64 -9 -9-10 000 63 30 15 -19.4 -21.3 28.68 13 23 77 288 001 102 48 59 -9 -9-10 000 64 30 16 -20.4 -21.9 28.68 13 23 73 284 002 108 57 64 -9 -9 -9 000 65 30 17 -20.3 -21.8 28.67 12 22 60 271 000 108 58 61 -9 -9-10 000 66 30 18 -19.9 -21.6 28.67 11 19 61 272 000 105 52 61 -10-10-10 000 67 30 19 -19.6 -21.8 28.67 11 18 51 262 -003 99 41 60 -9 -9-10 000 68 30 20 -18.9 -21.7 28.66 11 17 47 258 000 93 38 56 -10 -9 -9 000 69 30 21 -18.1 -21.3 28.67 10 14 46 257 -003 86 37 58 -10-10-10 000 70 30 22 -17.1 -21.2 28.67 8 10 31 242 -001 75 40 57 -9 -9-10 000 71 30 23 -16.0 -20.4 28.66 7 9 14 225 001 70 44 56 -9 -9-10 000 72 01 00 -15.7 -20.0 28.67 4 6 11 222 004 74 46 59 -9 -9-10 000 73 01 01 -16.4 -20.3 28.67 5 5 15 226 005 78 56 59 -9-10-11 000 74 01 02 -16.4 -20.1 28.68 2 6 304 155 -003 83 60 61 -12-11-11 000 75 01 03 -16.7 -19.7 28.67 4 5 284 135 000 88 56 63 -11-11-11 000 76 01 04 -17.8 -19.2 28.67 5 6 285 136 000 102 56 65 -11-11-11 000 77 01 05 -18.7 -18.7 28.67 5 8 258 109 000 118 71 67 -12-12-12 000 78 01 06 -20.7 -20.8 28.67 3 7 245 96 000 121 68 64 -12-11-11 000 79 01 07 -20.7 -20.7 28.67 4 6 250 101 001 121 70 70 -11-11-12 000 80 01 08 -21.1 -21.1 28.67 4 6 248 99 000 121 68 73 -12-11-12 000 81 01 09 -21.5 -21.5 28.68 2 6 235 86 000 122 69 74 -13-12-12 000 82 01 10 -22.9 -22.9 28.69 3 6 271 122 000 124 78 65 -14-12-12 000 83 01 11 -25.1 -25.8 28.69 6 6 301 152 000 126 83 65 -13-12-12 000 84 01 12 -23.6 -24.3 28.69 7 9 306 157 000 124 80 63 -13-12-12 000 85 01 13 -22.5 -23.1 28.69 6 9 303 154 000 124 74 65 -13-12-12 000 86 01 14 -23.3 -23.9 28.69 5 9 310 161 000 125 73 64 -13-12-12 000 87 01 15 -25.1 -25.9 28.70 5 9 316 167 000 127 75 62 -14-12-12 000 88 01 16 -25.5 -26.2 28.70 6 9 331 182 000 127 69 61 -14-12-12 000 89 01 17 -24.9 -25.5 28.70 8 11 341 192 000 127 69 62 -15-12-12 000 90 01 18 -23.9 -24.3 28.71 9 11 344 195 000 126 69 61 -14-13-12 000 91 01 19 -23.7 -24.1 28.71 10 13 340 191 000 125 63 58 -14-13-12 000 92 01 20 -23.4 -23.8 28.71 10 11 335 186 000 125 63 57 -14-13-12 000 93 01 21 -23.1 -23.6 28.72 9 12 330 181 000 125 70 56 -14-13-13 000 94 01 22 -23.2 -23.6 28.73 8 11 326 177 000 125 72 54 -15-13-13 000 95 01 23 -23.2 -23.6 28.73 7 10 322 173 000 125 68 49 -16-13-13 000 96 02 00 -22.6 -23.0 28.74 7 10 323 174 000 124 70 51 -16-13-13 000 97 02 01 -22.4 -22.8 28.74 9 11 326 177 000 124 68 53 -15-13-13 000 98 02 02 -22.2 -22.7 28.75 10 13 327 178 000 124 72 55 -15-13-13 000 99 02 03 -22.0 -22.4 28.75 9 14 320 172 000 123 82 54 -17-14-13 000 100 02 04 -22.0 -22.4 28.75 9 13 318 169 000 123 94 57 -18-14-14 000 101 02 05 -22.0 -22.4 28.75 9 13 321 172 000 123 92 60 -18-15-14 000 102 02 06 -21.9 -22.4 28.76 10 15 327 178 000 123 93 62 -18-15-13 000 103 02 07 -21.7 -22.2 28.76 10 15 332 183 -001 123 98 63 -19-15-13 000 104 02 08 -21.7 -22.1 28.77 9 14 334 185 -001 123 99 64 -20-16-14 000 105 02 09 -21.6 -22.1 28.78 9 14 344 195 000 123108 69 -21-17-15 000 106 02 10 -21.8 -22.7 28.79 9 13 355 206 -001 117112 83 -21-18-15 001 107 02 11 -22.1 -23.9 28.79 8 12 3 214 000 108104 94 -21-18-16 004 108 02 12 -22.0 -24.1 28.79 7 12 4 215 000 104 99102 -20-19-16 006 109 02 13 -21.9 -24.2 28.79 7 11 8 219 -001 102 98103 -20-19-17 009 110 02 14 -22.1 -24.4 28.79 5 8 7 218 -001 102100102 -21-20-17 009 111 02 15 -22.3 -24.6 28.79 5 6 8 219 000 102101102 -21-20-18 006 112 02 16 -22.0 -24.3 28.79 3 8 353 204 000 100101102 -21-21-19 005 113 02 17 -21.6 -24.0 28.79 1 9 324 175 000 99100102 -21-21-19 009 114 02 18 -21.4 -23.8 28.78 1 9 288 139 000 99 99101 -21-21-20 008 115 02 19 -21.5 -23.9 28.78 1 9 314 165 000 100 99100 -21-21-20 006 116 02 20 -21.7 -24.0 28.77 2 9 317 168 000 100 99100 -21-21-20 005 117 02 21 -22.2 -24.5 28.77 4 9 311 162 000 102100100 -21-22-20 004 118 02 22 -22.8 -24.9 28.76 5 10 312 163 000 104101 99 -21-22-20 002 119 02 23 -23.0 -25.0 28.75 5 11 327 178 000 107 99100 -21-22-21 002 120 03 00 -23.6 -25.2 28.74 5 11 341 192 000 111101101 -21-21-21 001 * 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.