USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-05-03/12 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 03 12 -16.0 -21.0 28.57 7 9 118 329 000 61 40 39 -13-12-11 000 1 03 13 -18.8 -22.1 28.56 6 10 132 343 -005 85 54 47 -14-13-12 000 2 03 14 -18.9 -21.4 28.55 4 9 130 341 -002 95 75 72 -14-13-13 000 3 03 15 -18.3 -20.0 28.53 4 12 128 339 001 103 93103 -13-14-15 001 4 03 16 -17.8 -19.0 28.52 4 10 127 338 000 108 99105 -13-14-15 007 5 03 17 -17.8 -19.3 28.55 3 7 131 342 000 107106102 -13-14-15 005 6 03 18 -16.7 -18.2 28.54 6 12 35 246 000 104 99102 -14-15-15 008 7 03 19 -16.9 -18.2 28.56 9 13 353 204 -003 107 91105 -15-15-15 016 8 03 20 -17.6 -19.5 28.58 13 18 349 200 -001 101101105 -16-15-16 012 9 03 21 -19.8 -22.0 28.63 16 24 341 192 -004 100100101 -17-16-16 026 10 03 22 -20.0 -22.6 28.70 19 31 337 188 -003 97 79 96 -18-17-17 011 11 03 23 -19.7 -22.1 28.75 20 31 332 183 -001 98 97 98 -18-17-17 011 12 04 00 -21.0 -23.3 28.79 17 28 342 193 000 100 95 91 -18-17-17 015 13 04 01 -22.8 -24.8 28.82 16 26 357 208 000 105 82 85 -19-17-17 003 14 04 02 -22.9 -24.4 28.87 15 25 6 217 -001 112 82 82 -18-17-17 000 15 04 03 -22.2 -23.4 28.90 13 21 11 222 -001 115 82 81 -17-17-17 000 16 04 04 -22.0 -23.0 28.93 11 18 17 228 -005 116 86 78 -16-17-16 000 17 04 05 -22.2 -23.0 28.95 9 15 25 236 -007 120 85 72 -16-16-16 000 18 04 06 -21.6 -22.9 28.97 7 9 41 252 -008 112 82 77 -16-16-16 000 19 04 07 -21.6 -23.0 28.98 6 6 65 276 -009 110 91 87 -15-15-16 000 20 04 08 -21.7 -22.9 28.99 7 11 86 297 -009 112 96 91 -15-15-16 000 21 04 09 -22.1 -22.7 29.01 9 16 112 323 000 122 98 92 -15-15-16 000 22 04 10 -22.0 -22.6 29.03 10 18 119 330 -001 122 99 95 -15-16-16 000 23 04 11 -22.2 -22.8 29.03 10 21 128 339 000 123 99 95 -16-16-16 000 24 04 12 -22.5 -23.0 29.02 11 22 138 349 -005 123 98 92 -16-16-16 000 25 04 13 -22.5 -23.0 29.01 11 25 142 353 -002 123 99 94 -16-16-15 000 26 04 14 -22.2 -22.7 29.02 12 25 136 347 002 123 95102 -16-15-15 000 27 04 15 -22.5 -23.0 29.01 11 21 139 350 -002 123 95 77 -15-15-15 000 28 04 16 -23.1 -23.7 29.00 9 19 135 346 001 124 89 66 -15-15-15 000 29 04 17 -23.9 -24.5 28.99 9 15 122 333 000 124 47 48 -15-15-15 000 30 04 18 -24.1 -24.5 28.98 9 12 111 322 001 123 33 45 -13-15-15 000 31 04 19 -22.9 -27.0 28.97 10 12 74 285 001 76 33 40 -14-15-15 000 32 04 20 -23.1 -24.9 28.97 10 13 73 284 -001 102 34 40 -14-15-15 000 33 04 21 -22.5 -24.4 28.95 9 13 67 278 -003 100 33 45 -14-14-15 000 34 04 22 -22.5 -24.6 28.95 8 11 69 280 -002 97 43 39 -14-14-15 000 35 04 23 -22.7 -26.0 28.94 9 13 80 291 000 84 45 40 -14-14-15 000 36 05 00 -22.8 -27.3 28.93 9 12 86 297 001 73 45 35 -13-14-15 000 37 05 01 -22.7 -27.7 28.92 9 13 87 298 001 68 42 41 -13-14-15 000 38 05 02 -22.9 -27.5 28.90 8 16 98 309 -001 73 43 40 -13-13-14 000 39 05 03 -21.9 -27.4 28.89 11 18 111 322 -003 63 40 39 -12-13-14 000 40 05 04 -21.6 -27.5 28.87 11 17 119 330 -002 59 34 38 -12-12-13 000 41 05 05 -22.0 -27.3 28.85 10 17 125 336 002 64 36 41 -12-12-13 000 42 05 06 -22.4 -27.0 28.84 9 16 129 340 003 71 42 41 -12-12-12 000 43 05 07 -22.6 -27.2 28.82 8 14 138 349 003 72 44 41 -12-12-12 000 44 05 08 -22.5 -27.1 28.80 7 12 147 358 002 73 34 39 -12-12-12 000 45 05 09 -21.9 -26.6 28.78 6 12 147 358 000 74 37 59 -12-11-12 000 46 05 10 -21.3 -25.7 28.77 6 10 143 354 002 77 56 65 -12-12-12 000 47 05 11 -21.0 -25.1 28.77 6 10 132 343 002 80 62 49 -12-12-12 000 48 05 12 -20.9 -24.2 28.74 6 9 126 337 001 85 55 55 -11-11-11 000 49 05 13 -20.7 -22.0 28.73 7 10 111 322 001 104 50 60 -11-11-11 000 50 05 14 -21.5 -22.2 28.71 9 13 99 310 000 114 48 53 -11-10-10 000 51 05 15 -21.2 -23.2 28.69 9 12 78 289 000 97 46 50 -10-10-10 000 52 05 16 -20.3 -22.8 28.68 10 14 70 281 -002 92 41 51 -10 -9-10 000 53 05 17 -20.7 -22.2 28.66 11 16 64 275 000 106 39 46 -10 -9-10 000 54 05 18 -21.5 -22.6 28.64 10 21 66 277 -006 113 38 46 -8 -9-10 000 55 05 19 -19.5 -22.1 28.62 11 19 68 279 -004 93 38 47 -9 -9 -9 000 56 05 20 -18.2 -21.6 28.60 11 18 64 275 -006 84 38 44 -9 -9 -9 000 57 05 21 -18.6 -21.0 28.59 10 19 61 272 -005 95 38 36 -10 -9 -9 000 58 05 22 -19.1 -20.8 28.58 10 20 58 269 -008 104 40 29 -11 -9 -9 000 59 05 23 -18.3 -20.6 28.58 13 21 54 265 -011 97 39 33 -11 -9 -9 000 60 06 00 -19.2 -20.6 28.57 13 21 47 258 -004 108 36 36 -11 -9 -8 000 61 06 01 -19.8 -21.3 28.56 13 21 51 262 -002 108 35 38 -10 -9 -8 000 62 06 02 -19.8 -21.5 28.56 13 22 48 259 -008 106 52 38 -10 -9 -9 000 63 06 03 -19.3 -21.8 28.55 13 19 49 260 001 94 50 40 -8 -8 -8 000 64 06 04 -18.8 -21.8 28.55 13 19 50 261 005 90 44 44 -8 -8 -9 000 65 06 05 -19.0 -22.1 28.55 13 19 52 263 000 89 34 52 -9 -8 -9 000 66 06 06 -18.9 -22.0 28.55 13 19 58 269 003 88 41 53 -8 -9-10 000 67 06 07 -18.2 -21.7 28.54 12 19 55 266 -002 83 39 54 -8 -9-10 000 68 06 08 -18.9 -22.0 28.54 11 17 47 258 -008 86 39 54 -8 -9-10 000 69 06 09 -20.5 -22.6 28.54 10 14 46 257 -011 98 39 50 -9 -9-10 000 70 06 10 -20.7 -22.5 28.55 11 14 55 266 -009 103 42 45 -10-10-10 000 71 06 11 -20.3 -22.3 28.54 11 14 48 259 000 101 41 40 -10-10-10 000 72 06 12 -20.1 -21.9 28.54 11 15 39 250 -003 102 43 41 -10-10-10 000 73 06 13 -19.7 -22.2 28.54 10 14 34 245 -009 91 41 44 -10-10-10 000 74 06 14 -19.7 -22.0 28.53 9 12 17 228 -008 92 38 46 -10-10-10 000 75 06 15 -20.6 -22.0 28.53 10 13 12 223 -008 106 42 47 -11-10-10 000 76 06 16 -23.2 -23.6 28.54 5 9 31 242 003 123 58 50 -13-12-12 000 77 06 17 -22.3 -22.6 28.55 8 8 32 243 001 121 67 55 -14-13-13 000 78 06 18 -22.9 -23.4 28.56 10 13 16 227 002 124 66 67 -14-13-14 000 79 06 19 -24.8 -25.4 28.56 10 14 12 223 000 126 65 72 -14-13-14 000 80 06 20 -25.3 -25.9 28.57 11 17 6 217 000 127 63 76 -15-14-14 000 81 06 21 -25.7 -26.2 28.57 11 17 9 220 -003 127 59 74 -15-14-14 000 82 06 22 -26.3 -26.9 28.58 11 15 5 216 -003 128 64 56 -15-14-15 000 83 06 23 -26.9 -27.5 28.59 10 14 6 217 -006 129 64 68 -15-15-15 000 84 07 00 -26.4 -27.0 28.59 9 14 7 218 -008 127 66 60 -16-15-15 000 85 07 01 -26.4 -27.0 28.59 9 13 10 221 -008 127 73 42 -17-16-15 000 86 07 02 -25.8 -26.3 28.59 8 11 14 225 -003 126 69 38 -16-16-15 000 87 07 03 -25.2 -25.6 28.59 7 9 9 220 001 125 62 27 -16-15-15 000 88 07 04 -22.8 -22.8 28.59 4 5 23 234 005 123 66 24 -16-15-15 000 89 07 05 -21.4 -21.6 28.58 3 3 17 228 006 116 63 19 -15-15-16 000 90 07 06 -21.3 -21.6 28.58 3 10 110 321 -005 114 81 14 -16-17-17 000 91 07 07 -24.2 -24.3 28.57 7 12 134 345 000 123 75 18 -16-15-16 000 92 07 08 -24.5 -24.7 28.55 6 11 156 7 000 125 77 23 -15-15-15 000 93 07 09 -25.7 -26.2 28.54 7 14 174 25 000 126 69 30 -15-14-15 000 94 07 10 -25.6 -26.3 28.53 8 15 184 35 000 126 68 38 -16-14-15 000 95 07 11 -25.0 -25.7 28.51 8 17 181 32 000 126 70 58 -16-14-14 000 96 07 12 -25.8 -26.6 28.49 7 16 171 22 -001 127 69 66 -16-15-14 000 97 07 13 -25.5 -26.2 28.48 7 15 167 18 -003 126 58 70 -16-14-14 000 98 07 14 -24.4 -24.8 28.45 6 12 168 19 -003 124 53 71 -14-14-14 000 99 07 15 -23.8 -23.9 28.43 6 11 169 20 000 124 58 63 -14-13-13 000 100 07 16 -22.8 -23.1 28.42 4 9 116 327 000 118 61 60 -15-14-14 000 101 07 17 -23.6 -24.8 28.41 6 7 99 310 002 110 58 68 -15-14-14 000 102 07 18 -21.0 -25.0 28.40 2 3 120 331 000 81 58 69 -13-13-13 000 103 07 19 -20.6 -25.0 28.39 2 4 67 278 002 78 53 55 -14-14-14 000 104 07 20 -23.7 -25.7 28.39 6 6 34 245 001 100 49 56 -14-14-14 000 105 07 21 -21.7 -25.3 28.39 5 5 37 248 001 85 55 54 -14-13-14 000 106 07 22 -23.7 -26.4 28.39 8 9 31 242 000 92 57 31 -13-13-14 000 107 07 23 -24.7 -27.2 28.39 9 11 39 250 000 96 30 54 -13-13-13 000 108 08 00 -24.7 -27.3 28.39 10 12 43 254 -002 95 31 42 -13-12-13 000 109 08 01 -23.7 -27.0 28.40 10 13 38 249 -003 85 38 43 -12-12-13 000 110 08 02 -23.1 -26.7 28.40 10 12 34 245 -003 81 45 47 -12-12-13 000 111 08 03 -23.0 -26.4 28.40 8 10 37 248 -003 84 47 49 -12-12-13 000 112 08 04 -21.8 -25.8 28.40 6 7 48 259 000 80 48 55 -12-12-13 000 113 08 05 -19.6 -25.2 28.40 3 4 61 272 008 69 49 59 -12-13-14 000 114 08 06 -18.9 -25.2 28.40 2 8 148 359 000 65 48 56 -13-13-13 000 115 08 07 -20.3 -25.4 28.39 6 12 156 7 000 70 47 54 -13-12-13 000 116 08 08 -20.6 -25.1 28.38 4 9 171 22 -006 77 50 50 -13-13-13 000 117 08 09 -21.8 -24.9 28.38 6 10 172 23 000 90 56 56 -15-13-13 000 118 08 10 -22.9 -25.2 28.38 4 9 165 16 -005 102 65 64 -15-14-14 000 119 08 11 -22.1 -24.8 28.38 2 9 109 320 -006 96 61 84 -17-15-15 000 120 08 12 -23.5 -25.3 28.38 6 8 36 247 -004 110 58 73 -20-15-14 000 * 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.