USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-04-30/12 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 30 12 -34.1 -37.8 28.90 9 13 10 221 000 98 97 99 -30-29-28 000 1 30 13 -36.7 -38.4 28.92 10 13 9 220 003 124 91104 -29-28-28 000 2 30 14 -37.7 -39.3 28.93 9 11 24 235 003 124 89113 -29-28-28 000 3 30 15 -37.5 -38.9 28.92 9 11 34 245 001 124 91107 -28-28-29 000 4 30 16 -37.7 -39.0 28.93 9 11 34 245 -001 126 93 94 -28-28-29 000 5 30 17 -37.8 -38.8 28.94 9 11 40 251 002 130 93 85 -28-28-28 000 6 30 18 -37.5 -38.4 28.95 9 12 43 254 001 133 90 80 -28-28-28 000 7 30 19 -37.4 -38.2 28.95 9 12 52 263 002 135 84 78 -28-27-27 000 8 30 20 -37.2 -38.0 28.94 10 12 60 271 002 134 76 72 -27-27-27 000 9 30 21 -36.8 -37.9 28.94 10 13 68 279 002 128 71 71 -27-27-27 000 10 30 22 -36.3 -37.6 28.95 10 14 78 289 001 124 69 67 -27-27-27 000 11 30 23 -35.9 -37.3 28.94 11 16 82 293 003 124 67 63 -27-27-27 000 12 01 00 -35.7 -37.1 28.94 11 19 82 293 002 124 64 60 -27-27-26 000 13 01 01 -35.5 -37.1 28.95 12 21 82 293 003 122 62 57 -27-26-26 000 14 01 02 -35.4 -37.0 28.94 12 22 86 297 002 122 57 48 -26-26-25 000 15 01 03 -35.1 -37.0 28.93 13 23 90 301 002 118 54 42 -26-25-25 000 16 01 04 -34.6 -36.9 28.90 13 25 94 305 003 112 51 38 -25-25-24 000 17 01 05 -34.4 -37.2 28.88 14 26 98 309 001 105 48 34 -25-24-24 000 18 01 06 -34.1 -37.6 28.87 14 27 103 314 002 96 46 29 -25-24-24 000 19 01 07 -33.7 -37.8 28.85 15 28 108 319 002 89 42 26 -25-24-23 000 20 01 08 -33.4 -38.0 28.83 15 30 114 325 002 83 38 24 -26-24-23 000 21 01 09 -33.1 -38.1 28.81 16 31 118 329 002 80 34 20 -26-23-22 000 22 01 10 -32.8 -38.1 28.79 16 31 118 329 002 76 31 18 -25-23-22 000 23 01 11 -32.5 -38.3 28.77 16 32 118 329 003 71 29 16 -25-23-22 000 24 01 12 -32.2 -38.4 28.74 16 31 121 332 001 68 26 14 -24-22-21 000 25 01 13 -31.9 -38.2 28.72 16 29 124 335 002 65 23 13 -23-21-20 000 26 01 14 -31.4 -37.9 28.69 15 29 129 340 002 64 21 11 -23-20-19 000 27 01 15 -31.1 -37.7 28.65 15 29 129 340 002 64 19 11 -22-20-18 000 28 01 16 -30.8 -37.4 28.62 15 30 129 340 001 63 17 10 -21-19-17 000 29 01 17 -29.9 -36.5 28.59 15 30 127 338 001 62 14 10 -20-18-17 000 30 01 18 -29.2 -35.5 28.55 14 30 129 340 004 65 11 9 -19-17-16 000 31 01 19 -28.7 -34.2 28.52 15 30 127 338 000 71 10 9 -18-16-15 000 32 01 20 -28.0 -31.5 28.49 14 29 131 342 -002 92 8 8 -17-15-14 000 33 01 21 -28.0 -29.6 28.46 13 28 131 342 -003 114 7 8 -16-14-14 000 34 01 22 -26.9 -28.6 28.45 13 27 130 341 000 112 10 9 -15-14-13 000 35 01 23 -25.3 -27.7 28.43 11 24 120 331 -002 102 47 22 -14-13-13 000 36 02 00 -23.5 -27.1 28.41 11 21 123 334 -004 86 62 41 -13-12-12 000 37 02 01 -21.0 -25.0 28.42 12 21 102 313 003 82 67 49 -14-13-13 000 38 02 02 -22.1 -24.3 28.41 9 16 91 302 000 101 61 47 -12-12-13 000 39 02 03 -21.6 -22.0 28.42 12 20 61 272 -003 121 68 40 -13-13-13 000 40 02 04 -22.1 -22.5 28.42 10 16 59 270 015 121 73 47 -12-12-13 000 41 02 05 -22.1 -22.6 28.42 11 16 50 261 005 122 74 53 -12-11-12 000 42 02 06 -22.3 -22.8 28.43 12 20 46 257 007 123 75 75 -13-12-12 000 43 02 07 -21.9 -22.4 28.45 12 20 42 253 003 122 79 63 -12-12-12 000 44 02 08 -22.1 -22.6 28.45 9 15 39 250 -003 122 66 44 -11-11-12 000 45 02 09 -21.3 -21.6 28.44 7 16 25 236 -004 120 52 41 -10-11-11 000 46 02 10 -17.0 -17.6 28.45 3 8 27 238 -002 107 46 55 -9 -9-10 000 47 02 11 -21.2 -21.7 28.47 13 17 80 291 -001 121 57 68 -10-11-11 000 48 02 12 -19.7 -23.7 28.46 11 16 85 296 -001 75 49 82 -10-11-12 000 49 02 13 -19.9 -22.7 28.45 12 20 96 307 -001 91 84 80 -10-11-11 000 50 02 14 -20.6 -22.1 28.45 12 21 92 303 -001 106 73 46 -11-11-11 000 51 02 15 -22.2 -23.6 28.45 13 23 80 291 000 110 40 44 -10-10-10 000 52 02 16 -21.1 -23.1 28.44 16 24 74 285 000 103 44 38 -11-11-11 000 53 02 17 -22.2 -22.9 28.42 14 28 69 280 002 119 39 28 -12 -9-10 000 54 02 18 -19.5 -21.5 28.41 20 33 62 273 007 101 36 30 -11 -9 -9 000 55 02 19 -19.9 -21.8 28.41 21 34 69 280 004 103 38 34 -13-10-10 000 56 02 20 -19.3 -22.0 28.41 22 35 64 276 023 94 37 30 -13-10-10 000 57 02 21 -19.4 -22.2 28.42 23 34 64 275 001 93 37 34 -13-10-11 000 58 02 22 -20.2 -22.4 28.43 20 32 70 281 -005 99 41 44 -15-11-12 000 59 02 23 -20.6 -22.6 28.43 19 31 71 282 -003 102 43 51 -15-12-12 000 60 03 00 -21.0 -22.9 28.43 19 31 71 282 -006 104 47 55 -15-13-13 000 61 03 01 -21.7 -23.3 28.43 16 28 70 281 -020 107 40 43 -14-12-13 000 62 03 02 -21.6 -23.5 28.42 19 31 64 275 006 104 39 34 -13-13-13 000 63 03 03 -22.2 -23.5 28.45 17 26 55 266 008 111 42 43 -16-13-14 000 64 03 04 -22.6 -23.5 28.46 16 25 54 265 011 118 44 45 -13-13-13 000 65 03 05 -22.7 -23.1 28.50 16 23 53 264 008 124 98 69 -12-13-14 000 66 03 06 -21.7 -22.1 28.54 12 18 59 270 -002 122 81103 -12-12-14 000 67 03 07 -20.7 -21.2 28.59 12 23 55 266 -009 122 87 93 -16-13-14 000 68 03 08 -17.8 -18.2 28.61 11 21 60 271 000 118 91 81 -14-13-14 000 69 03 09 -19.8 -20.3 28.62 10 18 74 285 000 120 98102 -12-13-14 000 70 03 10 -19.0 -22.0 28.62 9 15 83 294 -009 90 87 89 -12-12-13 000 71 03 11 -21.0 -23.0 28.62 10 14 90 301 -002 99 43 73 -12-13-14 000 72 03 12 -21.5 -24.6 28.63 9 11 98 309 -003 86 48 63 -12-13-14 000 73 03 13 -21.9 -24.8 28.64 8 9 96 307 -002 89 50 62 -11-12-14 000 74 03 14 -19.7 -23.9 28.63 5 11 83 294 -003 79 48 69 -11-13-14 000 75 03 15 -20.6 -24.9 28.63 8 11 115 326 -003 73 46 65 -11-13-14 000 76 03 16 -21.0 -24.4 28.64 12 20 111 322 -006 85 46 62 -12-13-14 000 77 03 17 -21.5 -25.9 28.64 10 15 91 302 002 72 47 60 -12-13-14 000 78 03 18 -20.0 -25.1 28.65 6 9 66 277 002 69 48 61 -11-13-14 000 79 03 19 -23.3 -25.9 28.65 9 13 1 212 -004 92 49 46 -12-13-14 000 80 03 20 -24.0 -25.9 28.66 9 14 345 196 -008 102 50 46 -14-14-14 000 81 03 21 -22.1 -24.9 28.69 7 11 320 171 001 89 66 66 -14-15-15 000 82 03 22 -23.5 -25.2 28.70 9 12 328 179 008 102 60 65 -13-14-15 000 83 03 23 -24.2 -25.0 28.72 10 13 313 164 000 116 53 63 -15-15-15 000 84 04 00 -23.7 -24.3 28.74 11 16 322 173 003 121 76 71 -14-15-15 000 85 04 01 -25.1 -25.6 28.77 10 16 348 199 000 127 87 75 -15-15-16 000 86 04 02 -23.6 -24.1 28.79 10 16 356 207 001 125 60 88 -15-16-16 000 87 04 03 -23.3 -23.8 28.81 11 17 6 217 000 124 52 79 -15-16-16 000 88 04 04 -24.5 -25.0 28.83 11 19 2 213 -002 126 49 81 -16-16-16 000 89 04 05 -25.3 -25.9 28.85 11 18 6 217 -004 127 47 70 -16-16-17 000 90 04 06 -25.3 -25.8 28.88 10 17 7 218 -007 126 52 50 -17-17-17 000 91 04 07 -25.2 -25.7 28.90 9 15 6 217 -005 125 68 42 -17-17-18 000 92 04 08 -25.6 -26.2 28.93 9 15 19 230 -004 126 77 55 -17-17-18 000 93 04 09 -25.9 -26.5 28.96 9 13 29 240 -001 126 83 69 -17-17-18 000 94 04 10 -25.6 -26.1 28.98 8 11 38 249 -001 125 70 76 -16-17-17 000 95 04 11 -24.8 -25.3 29.00 8 11 53 264 -003 124 67 87 -16-16-17 000 96 04 12 -24.4 -24.9 29.01 9 12 67 278 -003 124 65 76 -15-16-17 000 97 04 13 -23.7 -24.1 29.02 10 15 77 288 000 123 68 72 -15-16-17 000 98 04 14 -23.4 -24.6 29.02 11 16 86 297 001 111 76 54 -15-16-16 000 99 04 15 -23.7 -24.0 29.02 11 18 87 298 003 123 70 33 -15-15-16 000 100 04 16 -23.3 -24.2 29.02 11 17 82 293 003 114 64 30 -14-14-15 000 101 04 17 -23.2 -26.3 29.02 11 15 83 294 -001 87 47 40 -13-14-14 000 102 04 18 -22.9 -27.7 29.02 11 15 91 302 001 70 41 45 -13-14-14 000 103 04 19 -22.7 -27.4 29.01 11 17 93 305 001 72 28 28 -13-13-13 000 104 04 20 -22.5 -27.3 29.00 11 16 90 301 000 70 54 66 -12-12-13 000 105 04 21 -21.5 -25.9 28.99 11 18 99 310 000 73 65 59 -12-12-13 000 106 04 22 -21.1 -24.0 28.98 11 19 99 310 001 89 51 60 -11-12-13 000 107 04 23 -20.9 -22.7 28.96 11 19 103 314 000 103 53 50 -11-11-12 000 108 05 00 -20.5 -22.1 28.94 11 20 101 313 001 104 51 63 -10-11-12 000 109 05 01 -19.8 -22.1 28.92 12 22 91 302 002 95 59 56 -10-11-12 000 110 05 02 -19.7 -21.1 28.89 11 21 99 310 003 105 59 42 -10-11-11 000 111 05 03 -20.5 -22.6 28.86 11 20 105 316 000 96 53 42 -10-11-11 000 112 05 04 -20.5 -23.4 28.83 11 20 109 320 001 89 43 53 -9-10-11 000 113 05 05 -20.9 -23.6 28.80 12 22 108 319 -003 94 47 60 -10-10-11 000 114 05 06 -23.1 -25.8 28.77 10 19 107 318 003 95 42 49 -11 -9-10 000 115 05 07 -24.0 -26.9 28.74 11 20 92 303 006 94 39 48 -9 -9-11 000 116 05 08 -23.9 -26.9 28.71 12 23 84 295 002 93 37 61 -9-10-12 000 117 05 09 -24.0 -26.8 28.69 12 22 80 291 001 95 41 57 -11-11-12 000 118 05 10 -23.9 -26.8 28.67 12 23 75 286 000 95 38 58 -11-11-12 000 119 05 11 -23.5 -27.0 28.65 12 22 70 281 000 87 33 51 -11-11-12 000 120 05 12 -24.5 -26.8 28.63 11 22 63 274 000 102 37 36 -10-11-11 000 * 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.