USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-05-01/00 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 01 00 -34.1 -39.1 28.91 9 15 92 303 000 71 66 59 -28-27-27 000 1 01 01 -35.5 -37.7 28.89 11 18 91 302 002 112 62 54 -28-27-27 000 2 01 02 -35.7 -37.9 28.90 12 21 90 301 002 114 56 49 -27-27-26 000 3 01 03 -35.7 -37.7 28.88 12 23 92 303 002 117 51 43 -27-26-26 000 4 01 04 -35.7 -38.2 28.86 13 26 90 301 001 111 48 38 -27-26-25 000 5 01 05 -35.9 -39.3 28.85 13 26 93 304 003 99 44 33 -26-25-25 000 6 01 06 -35.3 -39.6 28.83 14 27 104 315 001 87 40 27 -26-25-24 000 7 01 07 -34.9 -39.4 28.81 14 28 107 318 001 84 37 25 -26-25-24 000 8 01 08 -34.3 -38.9 28.77 15 29 114 325 001 83 33 21 -26-24-23 000 9 01 09 -33.7 -38.6 28.76 16 32 117 328 002 81 30 19 -26-24-23 000 10 01 10 -33.5 -38.6 28.76 17 32 116 327 003 78 30 17 -26-24-22 000 11 01 11 -33.4 -39.2 28.73 16 31 119 330 000 72 27 15 -25-23-21 000 12 01 12 -33.3 -39.4 28.69 16 30 122 333 002 68 24 13 -24-22-20 000 13 01 13 -32.7 -39.2 28.66 16 30 125 336 002 66 20 12 -23-20-19 000 14 01 14 -31.8 -38.5 28.64 16 30 127 338 001 64 18 11 -22-19-18 000 15 01 15 -31.2 -38.1 28.60 16 30 126 337 002 62 17 11 -22-19-17 000 16 01 16 -30.0 -37.0 28.58 16 30 123 334 -001 59 16 10 -21-19-17 000 17 01 17 -29.4 -36.6 28.54 15 30 126 337 002 58 11 10 -19-17-16 000 18 01 18 -28.8 -35.6 28.51 14 30 127 338 000 61 10 9 -18-16-15 000 19 01 19 -28.5 -33.9 28.48 14 29 128 339 000 72 9 9 -17-15-15 000 20 01 20 -27.2 -31.1 28.46 13 29 127 338 000 87 8 17 -16-14-14 000 21 01 21 -25.5 -27.1 28.44 13 28 130 341 001 112 31 39 -14-13-13 000 22 01 22 -23.9 -25.8 28.43 11 25 122 333 -007 107 49 42 -14-13-13 000 23 01 23 -22.2 -23.7 28.42 10 22 112 323 -006 109 62 58 -13-13-13 000 24 02 00 -21.2 -23.2 28.41 11 15 91 302 -007 100 71 95 -13-13-14 000 25 02 01 -21.0 -21.2 28.40 11 20 74 285 -008 119 88 98 -12-13-14 000 26 02 02 -21.3 -21.8 28.41 12 21 62 273 -010 122 85 85 -13-13-12 000 27 02 03 -20.1 -20.5 28.42 13 22 63 274 -003 120 80 69 -12-12-11 000 28 02 04 -20.6 -21.3 28.42 12 18 60 271 -001 116 76 73 -12-11-11 000 29 02 05 -20.2 -21.4 28.43 12 18 53 264 000 110 86 51 -12-12-12 000 30 02 06 -21.0 -21.4 28.43 11 20 48 259 000 121 79 50 -12-11-11 000 31 02 07 -20.2 -20.6 28.43 12 21 40 251 000 120 63 54 -10-11-11 000 32 02 08 -19.1 -20.8 28.43 12 20 44 255 001 104 67 61 -10-11-11 000 33 02 09 -19.8 -21.4 28.43 9 16 56 267 -004 105 78 75 -10-11-12 000 34 02 10 -23.0 -23.6 28.43 7 17 99 310 005 123 59 85 -10-10-11 000 35 02 11 -24.0 -24.6 28.43 10 24 102 313 000 125 65 89 -9-10-10 000 36 02 12 -22.4 -22.9 28.42 10 23 89 300 -012 122 42 69 -8 -9 -9 000 37 02 13 -21.6 -22.5 28.42 14 27 76 287 -013 117 37 47 -10 -9-10 000 38 02 14 -20.9 -22.2 28.42 16 27 74 285 -008 110 49 48 -12-11-11 000 39 02 15 -20.5 -21.9 28.41 16 29 72 283 000 108 51 51 -13-12-11 000 40 02 16 -19.3 -21.3 28.40 20 33 66 277 004 100 44 44 -12-10-10 000 41 02 17 -18.3 -20.6 28.40 22 39 65 276 016 97 52 42 -13-11-10 000 42 02 18 -17.8 -20.0 28.41 22 41 56 267 008 97 43 55 -14-11-11 000 43 02 19 -17.7 -20.4 28.43 24 41 54 265 034 92 39 47 -13-12-12 000 44 02 20 -19.2 -21.1 28.47 20 34 62 273 039 102 48 44 -14-13-14 000 45 02 21 -20.2 -21.8 28.48 17 32 56 267 022 107 53 47 -14-13-14 000 46 02 22 -20.9 -22.4 28.50 17 30 51 262 029 108 57 43 -13-13-14 000 47 02 23 -21.1 -22.9 28.52 16 28 51 262 022 105 57 32 -12-13-13 000 48 03 00 -21.1 -23.1 28.53 16 27 56 267 023 103 51 34 -12-13-13 000 49 03 01 -21.0 -23.4 28.53 15 26 56 267 019 99 42 36 -12-12-12 000 50 03 02 -21.3 -23.9 28.53 15 25 59 270 014 96 39 38 -11-12-11 000 51 03 03 -21.6 -23.9 28.53 15 24 58 269 005 99 40 34 -11-12-12 000 52 03 04 -21.8 -23.8 28.54 14 23 57 268 012 103 42 41 -12-13-14 000 53 03 05 -22.7 -24.1 28.55 11 18 57 268 -004 111 44 42 -13-13-14 000 54 03 06 -23.0 -24.8 28.55 9 11 65 276 007 104 43 48 -13-12-13 000 55 03 07 -23.1 -24.4 28.56 10 12 96 307 001 113 44 52 -13-13-14 000 56 03 08 -23.3 -25.1 28.55 9 10 94 305 001 104 42 53 -12-13-13 000 57 03 09 -23.2 -25.0 28.53 10 15 92 303 005 105 40 51 -12-12-12 000 58 03 10 -23.6 -25.2 28.51 9 19 85 296 -003 109 36 48 -12-12-11 000 59 03 11 -22.9 -23.8 28.50 11 21 80 291 000 117 36 42 -12-12-12 000 60 03 12 -22.3 -23.5 28.48 10 19 71 282 001 113 39 45 -13-12-13 000 61 03 13 -21.3 -23.3 28.48 9 17 78 289 -002 102 44 55 -13-13-14 000 62 03 14 -21.6 -23.7 28.49 8 12 68 279 -003 100 44 55 -13-14-14 000 63 03 15 -21.5 -22.8 28.51 10 16 34 245 -004 112 48 60 -14-15-16 000 64 03 16 -20.4 -22.6 28.53 9 15 0 211 -002 101 52 58 -15-15-17 000 65 03 17 -19.8 -22.2 28.57 14 20 327 178 001 98 55 71 -16-15-15 000 66 03 18 -20.0 -22.1 28.61 13 25 332 183 -008 101 65 91 -15-14-15 000 67 03 19 -20.6 -22.2 28.67 16 29 343 195 -003 106 81 95 -15-15-15 004 68 03 20 -21.2 -23.2 28.73 17 27 352 203 000 103 91 94 -17-15-16 010 69 03 21 -23.5 -25.7 28.79 15 23 6 217 002 104 87 95 -16-16-17 006 70 03 22 -24.2 -25.9 28.85 12 21 18 229 -006 110 94 90 -16-17-17 001 71 03 23 -24.6 -25.3 28.90 13 21 24 235 000 123 92 92 -16-17-17 001 72 04 00 -26.2 -26.7 28.95 13 21 29 240 -002 128 97 97 -17-17-17 001 73 04 01 -26.5 -27.0 28.99 12 19 34 245 -001 129 98100 -17-17-17 002 74 04 02 -26.6 -27.2 29.02 12 18 34 245 -003 129 89 96 -17-16-17 001 75 04 03 -26.3 -26.9 29.05 10 17 30 241 -005 128 92 77 -18-17-18 000 76 04 04 -27.1 -27.7 29.08 10 16 37 248 -006 129 82 65 -18-17-18 000 77 04 05 -26.5 -27.1 29.10 10 15 41 252 -007 128 70 50 -18-18-18 000 78 04 06 -25.8 -26.3 29.11 11 18 44 255 -005 127 74 46 -18-17-17 000 79 04 07 -25.2 -25.7 29.13 11 18 45 256 -002 126 63 42 -17-17-17 000 80 04 08 -25.1 -25.6 29.15 10 14 48 259 002 126 53 43 -16-16-17 000 81 04 09 -25.1 -25.5 29.17 9 12 48 259 006 124 43 45 -16-16-17 000 82 04 10 -24.3 -25.8 29.18 9 11 49 260 015 104 38 52 -15-15-16 000 83 04 11 -23.9 -26.9 29.19 9 11 50 261 015 87 35 44 -15-15-16 000 84 04 12 -24.0 -27.5 29.19 9 12 54 265 008 82 34 33 -15-15-16 000 85 04 13 -23.8 -28.0 29.20 9 11 65 276 007 75 36 36 -14-15-16 000 86 04 14 -24.1 -28.6 29.20 10 13 73 284 005 72 33 46 -14-15-16 000 87 04 15 -23.7 -28.9 29.20 11 16 69 280 002 68 30 50 -14-15-15 000 88 04 16 -23.6 -28.6 29.21 12 17 66 277 -001 70 28 51 -14-14-15 000 89 04 17 -23.4 -27.9 29.21 12 17 64 275 -003 75 27 47 -14-14-14 000 90 04 18 -23.6 -27.7 29.21 11 17 65 276 000 79 28 43 -14-13-13 000 91 04 19 -23.6 -27.1 29.22 11 17 70 281 000 84 30 44 -13-13-14 000 92 04 20 -23.6 -27.6 29.21 11 15 75 286 003 78 30 50 -13-13-14 000 93 04 21 -23.8 -28.1 29.21 10 13 80 291 001 74 28 45 -13-13-14 000 94 04 22 -23.6 -28.5 29.20 10 12 87 298 004 68 25 46 -13-13-14 000 95 04 23 -23.4 -29.4 29.20 9 13 101 312 003 60 23 45 -13-14-14 000 96 05 00 -23.4 -29.7 29.19 10 15 113 324 003 57 23 44 -13-14-14 000 97 05 01 -23.5 -29.3 29.18 11 16 118 329 004 61 26 36 -13-13-14 000 98 05 02 -23.7 -28.9 29.16 11 17 120 331 006 67 28 32 -14-13-14 000 99 05 03 -24.1 -28.2 29.15 11 18 121 332 006 78 29 28 -14-13-14 000 100 05 04 -24.2 -27.9 29.14 11 17 120 331 004 82 26 25 -14-13-13 000 101 05 05 -24.6 -28.0 29.12 11 17 125 336 003 85 24 23 -13-13-13 000 102 05 06 -24.7 -27.9 29.11 10 17 133 344 004 86 23 23 -14-13-13 000 103 05 07 -24.7 -27.8 29.09 10 18 143 354 005 88 25 23 -14-13-13 000 104 05 08 -24.4 -27.3 29.08 10 18 149 0 006 91 29 25 -15-13-13 000 105 05 09 -24.9 -27.1 29.07 10 18 153 4 005 100 32 23 -15-13-13 000 106 05 10 -25.0 -26.8 29.06 10 17 155 6 004 106 29 21 -15-13-14 000 107 05 11 -25.4 -26.5 29.05 10 17 157 8 004 114 29 23 -15-14-14 000 108 05 12 -25.7 -26.1 29.05 10 16 158 9 001 124 32 22 -15-14-14 000 109 05 13 -25.6 -26.0 29.04 9 15 161 12 001 125 31 20 -15-14-14 000 110 05 14 -25.6 -25.9 29.03 9 15 169 20 002 125 33 14 -14-14-14 000 111 05 15 -25.4 -25.6 29.02 9 15 181 32 002 124 31 13 -14-14-13 000 112 05 16 -25.1 -25.3 29.01 9 15 190 41 000 124 29 14 -15-14-13 000 113 05 17 -25.3 -25.5 29.01 9 14 194 45 000 124 31 15 -15-14-13 000 114 05 18 -25.6 -25.9 29.01 8 14 199 50 000 125 32 17 -14-13-13 000 115 05 19 -25.7 -26.0 29.00 8 14 206 57 000 125 32 17 -15-13-13 000 116 05 20 -25.7 -25.9 29.01 8 14 214 65 000 125 32 18 -15-14-13 000 117 05 21 -25.4 -25.6 29.00 8 15 223 74 002 125 32 17 -15-14-13 000 118 05 22 -25.8 -26.5 29.00 9 16 231 83 002 118 37 18 -14-14-14 000 119 05 23 -26.8 -27.9 29.00 9 15 231 82 003 116 41 17 -14-14-14 000 120 06 00 -27.9 -28.9 29.00 8 15 227 78 004 118 49 15 -15-14-14 000 * 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.