USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-05-01/12 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 01 12 -32.6 -39.6 28.69 15 24 130 341 000 52 27 14 -26-23-20 000 1 01 13 -34.0 -39.6 28.67 15 26 131 342 001 74 21 14 -24-20-19 000 2 01 14 -34.2 -40.0 28.63 16 29 130 341 003 73 19 13 -23-20-18 000 3 01 15 -34.4 -40.1 28.59 17 31 127 338 000 73 16 12 -23-18-17 000 4 01 16 -33.9 -39.9 28.58 17 31 125 336 004 71 14 11 -21-18-17 000 5 01 17 -32.5 -39.1 28.54 17 34 126 337 002 65 11 10 -20-17-16 000 6 01 18 -30.8 -37.8 28.52 15 30 125 336 000 60 9 10 -18-15-14 000 7 01 19 -28.8 -35.7 28.48 14 29 125 336 001 60 9 18 -17-14-14 000 8 01 20 -27.1 -32.8 28.45 14 29 127 338 003 69 13 39 -16-14-13 000 9 01 21 -26.2 -29.1 28.43 13 28 126 337 002 97 37 47 -14-12-12 000 10 01 22 -25.0 -27.3 28.43 11 25 128 339 -004 105 43 44 -13-12-12 000 11 01 23 -23.1 -25.8 28.42 11 24 126 337 008 97 46 39 -13-12-12 000 12 02 00 -20.6 -23.9 28.40 10 19 125 336 003 87 57 77 -12-12-12 000 13 02 01 -22.0 -24.1 28.39 10 17 124 335 -001 99 59 92 -11-11-11 000 14 02 02 -21.7 -23.8 28.40 10 16 92 304 001 97 70 90 -10-11-12 000 15 02 03 -19.9 -20.5 28.40 11 17 80 291 -002 112 67 86 -10-11-11 000 16 02 04 -19.4 -20.1 28.40 11 19 63 274 000 114 71 64 -11-11-10 000 17 02 05 -19.4 -19.9 28.41 13 21 47 258 -002 117 78 65 -10-10-10 000 18 02 06 -19.3 -19.9 28.42 13 20 57 268 000 117 75 53 -10-10-10 000 19 02 07 -20.1 -20.5 28.42 11 21 68 279 -002 120 77 57 -10-10-10 000 20 02 08 -18.9 -19.2 28.42 11 19 74 285 002 118 72 59 -10-10-10 000 21 02 09 -19.4 -19.8 28.42 11 22 77 288 002 119 64 67 -10 -9-10 000 22 02 10 -19.1 -20.3 28.42 12 21 80 291 000 108 47 82 -8 -9-11 000 23 02 11 -19.1 -21.2 28.41 11 20 83 294 000 97 39 75 -8 -9 -9 000 24 02 12 -20.4 -21.3 28.40 11 21 86 297 -003 114 38 63 -9 -9 -8 000 25 02 13 -21.2 -21.7 28.39 12 23 79 290 -005 121 41 60 -10-10-10 000 26 02 14 -20.8 -21.2 28.39 14 28 68 279 000 121 42 43 -10 -9-10 000 27 02 15 -17.9 -19.8 28.39 20 32 59 270 005 100 36 45 -10 -8-10 000 28 02 16 -16.7 -19.4 28.37 23 34 57 268 009 91 35 49 -10 -9 -9 000 29 02 17 -16.7 -19.1 28.38 30 42 53 264 053 95 34 57 -11 -8 -9 000 30 02 18 -16.1 -19.3 28.40 28 41 49 260 048 87 34 40 -11 -9-10 000 31 02 19 -16.9 -19.4 28.41 30 40 49 260 056 94 33 32 -12 -9-10 000 32 02 20 -18.8 -19.4 28.46 25 34 41 252 065 117114 38 -14-13-14 000 33 02 21 -16.9 -17.6 28.50 21 31 34 245 029 113114 63 -14-14-14 000 34 02 22 -16.5 -18.1 28.53 21 30 36 247 040 103115 45 -13-14-15 001 35 02 23 -19.1 -21.5 28.56 17 27 48 259 034 97 95 42 -13-13-14 000 36 03 00 -20.1 -22.3 28.59 17 29 52 263 029 99 51 50 -12-13-13 000 37 03 01 -20.4 -22.8 28.59 17 28 54 265 013 97 46 53 -12-13-13 000 38 03 02 -20.3 -22.9 28.61 15 27 62 273 -013 96 44 72 -12-13-13 000 39 03 03 -21.2 -22.9 28.63 12 23 71 282 -016 107 48 95 -12-12-13 000 40 03 04 -20.4 -22.3 28.64 12 19 79 290 002 103 78 73 -11-11-13 000 41 03 05 -19.4 -22.7 28.63 10 14 68 279 011 85 52 63 -10-11-12 000 42 03 06 -19.6 -23.0 28.62 11 16 68 279 013 83 38 44 -10-11-10 000 43 03 07 -20.0 -23.4 28.61 11 16 70 281 001 84 32 36 -10-10-10 000 44 03 08 -22.0 -23.7 28.59 10 18 94 305 -011 107 36 37 -11-11-10 000 45 03 09 -23.3 -24.3 28.57 8 18 86 297 -001 117 35 41 -10-10-10 000 46 03 10 -22.6 -24.3 28.54 10 20 93 304 002 107 37 44 -11-11-11 000 47 03 11 -21.6 -23.9 28.53 11 21 95 306 -002 99 36 52 -12-11-11 000 48 03 12 -21.9 -23.2 28.50 12 22 87 298 001 111 37 50 -12-11-11 000 49 03 13 -21.8 -22.3 28.47 13 24 81 292 006 122 54 44 -13-13-12 000 50 03 14 -22.0 -22.5 28.44 11 21 87 298 006 122 67 60 -13-12-12 000 51 03 15 -21.2 -21.7 28.44 12 24 76 287 005 122 77 74 -14-13-13 000 52 03 16 -22.2 -22.8 28.43 9 20 76 287 001 122 77 59 -13-12-12 000 53 03 17 -22.0 -22.5 28.43 10 18 63 274 -002 122 65100 -12-12-12 000 54 03 18 -22.3 -22.8 28.45 12 22 39 250 000 123 68 86 -15-13-13 000 55 03 19 -22.9 -23.5 28.45 10 14 25 236 -002 124 72 82 -14-13-14 000 56 03 20 -23.8 -24.3 28.47 11 17 16 227 000 125 75 82 -15-14-14 000 57 03 21 -26.4 -26.9 28.51 16 22 12 223 -001 129 74 86 -17-14-14 000 58 03 22 -27.8 -28.3 28.56 20 28 10 221 001 131 63 55 -18-16-14 000 59 03 23 -26.8 -27.3 28.60 22 35 7 218 -001 130 59 57 -22-16-15 000 60 04 00 -28.4 -29.6 28.65 25 35 5 216 000 122 61 84 -23-16-15 001 61 04 01 -26.9 -29.4 28.71 25 40 354 205 -001 103 81 90 -21-16-16 006 62 04 02 -27.4 -30.3 28.77 24 39 359 210 003 100 96 96 -22-16-16 017 63 04 03 -26.8 -29.7 28.84 24 38 8 219 -002 99 99 93 -24-16-16 023 64 04 04 -25.1 -27.7 28.89 22 33 7 218 007 101 99 91 -22-16-17 018 65 04 05 -24.2 -26.3 28.94 22 30 11 222 013 105100 89 -23-16-17 012 66 04 06 -23.7 -24.9 28.99 20 28 12 223 006 116101 81 -22-17-17 003 67 04 07 -23.5 -24.1 29.03 20 27 21 232 007 125108 73 -20-18-17 000 68 04 08 -23.6 -24.1 29.07 19 27 23 234 001 125 88 48 -20-18-18 000 69 04 09 -23.5 -24.0 29.11 17 25 29 240 002 125 80 47 -20-18-18 000 70 04 10 -24.4 -24.9 29.13 14 24 36 247 003 126 81 36 -18-17-18 000 71 04 11 -24.2 -24.7 29.15 12 21 44 255 003 125 49 49 -16-16-17 000 72 04 12 -23.7 -24.2 29.16 11 17 57 268 -005 124 46 48 -15-15-16 000 73 04 13 -23.1 -23.5 29.17 12 19 72 283 -003 123 43 52 -14-14-15 000 74 04 14 -23.3 -26.7 29.18 11 20 77 288 000 86 43 36 -14-14-15 000 75 04 15 -22.6 -27.8 29.19 12 17 80 291 -011 69 42 34 -13-14-15 000 76 04 16 -22.9 -27.6 29.19 11 17 91 302 -009 73 41 38 -13-14-15 000 77 04 17 -22.8 -28.0 29.19 12 19 102 313 004 69 42 31 -13-14-14 000 78 04 18 -22.3 -28.0 29.18 12 21 101 312 002 63 31 36 -12-13-14 000 79 04 19 -21.9 -27.5 29.16 12 23 97 308 001 64 29 30 -11-12-13 000 80 04 20 -21.9 -27.6 29.15 12 23 102 313 000 64 25 33 -11-11-12 000 81 04 21 -21.3 -27.5 29.13 13 25 114 325 004 61 26 31 -11-12-12 000 82 04 22 -20.8 -26.2 29.11 13 27 118 329 003 67 33 19 -11-11-12 000 83 04 23 -20.6 -24.8 29.08 11 24 122 333 000 78 41 19 -10-11-11 000 84 05 00 -21.5 -25.8 29.06 11 21 107 318 -001 77 29 23 -10-10-11 000 85 05 01 -20.5 -26.0 29.04 11 20 96 307 001 63 16 20 -9-10-10 000 86 05 02 -19.7 -23.5 29.01 12 23 111 322 002 81 39 45 -9-10-11 000 87 05 03 -20.0 -22.6 28.99 13 26 120 331 -001 95 45 46 -9 -9-10 000 88 05 04 -20.1 -22.9 28.96 12 27 117 328 000 93 44 58 -9 -9-10 000 89 05 05 -19.6 -22.7 28.94 12 25 113 324 001 89 47 62 -8 -9 -9 000 90 05 06 -19.7 -22.4 28.92 11 22 117 328 001 92 47 55 -8 -8 -9 000 91 05 07 -19.3 -22.1 28.89 11 23 121 332 002 92 53 60 -9 -8 -9 000 92 05 08 -18.5 -21.8 28.88 12 24 120 331 000 87 51 59 -11 -9 -9 000 93 05 09 -18.7 -21.9 28.86 10 21 118 329 -003 87 47 57 -10 -8 -9 000 94 05 10 -19.0 -22.1 28.84 9 19 109 320 -002 88 40 47 -9 -8 -8 000 95 05 11 -17.2 -20.8 28.82 8 15 104 315 -003 81 51 42 -8 -8 -8 000 96 05 12 -16.4 -19.7 28.81 8 15 90 301 -007 83 86 89 -8 -8 -9 000 97 05 13 -17.0 -19.7 28.80 10 16 72 283 -002 89 84 98 -8 -8 -9 000 98 05 14 -17.9 -20.0 28.78 8 13 67 278 000 95 71 84 -8 -9 -9 000 99 05 15 -17.4 -20.1 28.77 8 10 62 273 002 87 81 80 -8 -8 -9 000 100 05 16 -17.9 -20.3 28.76 10 13 66 277 003 90 89 60 -9 -9 -8 000 101 05 17 -18.1 -20.1 28.75 9 13 64 275 003 95 73 60 -8 -8 -8 000 102 05 18 -18.0 -20.1 28.74 10 15 63 274 000 94 62 59 -7 -8 -9 000 103 05 19 -18.6 -20.3 28.73 10 15 61 272 000 100 48 58 -7 -8 -9 000 104 05 20 -18.2 -20.4 28.72 10 15 63 274 000 93 46 67 -7 -8 -8 000 105 05 21 -17.1 -20.5 28.71 10 13 64 275 002 78 46 64 -7 -8 -8 000 106 05 22 -16.4 -20.6 28.70 8 9 59 270 002 73 46 65 -7 -8 -9 000 107 05 23 -14.4 -20.0 28.69 4 4 47 258 000 67 47 60 -7 -8 -9 000 108 06 00 -14.9 -20.3 28.68 0 5 116 327 -001 68 47 54 -8 -9-10 000 109 06 01 -15.0 -19.8 28.66 2 7 157 8 000 72 52 53 -8 -9-10 000 110 06 02 -15.6 -19.8 28.65 3 7 145 356 001 76 51 54 -9 -9 -9 000 111 06 03 -15.8 -20.1 28.63 2 5 121 332 001 75 49 56 -8 -8 -9 000 112 06 04 -16.0 -20.2 28.63 2 5 98 309 000 76 44 59 -9 -9 -9 000 113 06 05 -16.6 -20.3 28.62 1 5 260 111 -003 79 42 57 -9 -9 -9 000 114 06 06 -17.0 -19.3 28.62 4 6 261 112 -001 92 41 58 -9 -9 -9 000 115 06 07 -18.6 -19.9 28.61 7 9 259 110 001 100 40 60 -9 -9 -9 000 116 06 08 -17.7 -19.2 28.61 5 9 263 114 -002 101 42 58 -9 -9-10 000 117 06 09 -16.9 -18.9 28.60 4 8 274 125 000 96 47 59 -9 -9-10 000 118 06 10 -16.9 -18.8 28.60 5 8 280 131 000 96 57 62 -9 -9-10 000 119 06 11 -17.7 -19.6 28.60 6 8 277 128 000 96 61 66 -9 -9-10 000 120 06 12 -20.3 -20.7 28.60 6 6 338 189 000 119 73 71 -10-10-10 000 * 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.