USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-09-28/12 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 28 12 -25.8 -32.7 28.73 7 11 137 348 -001 48 39 43 -17-15-14 000 1 28 13 -27.3 -31.8 28.74 9 13 142 353 000 76 37 40 -16-14-13 000 2 28 14 -26.1 -30.9 28.72 8 15 148 359 -003 72 35 36 -15-13-13 000 3 28 15 -25.3 -30.6 28.72 9 16 155 6 000 68 30 35 -15-13-13 000 4 28 16 -26.1 -31.0 28.73 9 16 163 14 -001 72 31 39 -16-13-12 000 5 28 17 -26.7 -31.1 28.71 9 16 165 16 000 79 38 43 -16-14-13 000 6 28 18 -26.9 -31.2 28.73 7 14 165 16 004 80 40 47 -15-13-12 000 7 28 19 -24.7 -30.4 28.73 5 11 159 10 000 68 43 64 -14-12-12 000 8 28 20 -22.3 -30.0 28.71 4 10 178 29 -001 57 56 87 -14-13-13 000 9 28 21 -21.2 -29.8 28.74 4 8 167 18 000 52 71 96 -14-13-14 000 10 28 22 -20.8 -30.2 28.74 3 7 178 29 000 48 79 90 -13-14-14 000 11 28 23 -20.4 -30.1 28.75 2 6 153 4 000 46 78 87 -14-14-13 000 12 29 00 -19.9 -29.8 28.75 3 6 147 358 001 45 82 83 -14-14-12 000 13 29 01 -20.1 -29.8 28.76 3 6 135 346 002 46 91 78 -14-13-12 000 14 29 02 -20.0 -29.3 28.76 3 5 122 333 000 48 97 76 -14-13-12 000 15 29 03 -19.7 -27.7 28.76 2 4 131 342 000 55 91 67 -14-12-12 000 16 29 04 -20.0 -27.1 28.76 4 7 166 17 000 60 86 61 -13-12-12 000 17 29 05 -20.7 -27.4 28.77 5 9 157 8 000 62 88 49 -13-12-12 000 18 29 06 -21.4 -28.0 28.77 5 9 148 359 -001 63 85 45 -13-12-11 000 19 29 07 -22.7 -28.1 28.77 6 10 132 343 000 68 77 49 -13-12-11 000 20 29 08 -23.1 -27.4 28.77 6 10 127 338 000 78 72 58 -13-12-11 000 21 29 09 -23.6 -26.3 28.78 6 10 118 329 -001 94 54 64 -13-11-11 000 22 29 10 -23.5 -24.1 28.78 9 12 98 309 -002 123 55 58 -13-11-10 000 23 29 11 -20.8 -21.9 28.77 10 15 76 287 -002 113 47 51 -12-10-10 000 24 29 12 -20.5 -21.6 28.78 11 16 75 286 -002 111 44 49 -11-10 -9 000 25 29 13 -20.1 -20.9 28.79 11 21 70 281 -003 116 44 51 -11-10-10 000 26 29 14 -21.3 -21.8 28.81 14 24 67 278 -001 122 41 51 -12-10-10 000 27 29 15 -22.2 -23.1 28.81 16 25 59 270 000 118 35 42 -12 -8 -8 000 28 29 16 -20.4 -22.8 28.81 18 29 56 267 -004 99 34 38 -12 -8 -8 000 29 29 17 -21.4 -23.6 28.83 21 32 53 264 -003 101 33 28 -16 -9 -9 000 30 29 18 -23.0 -24.6 28.84 16 24 50 261 -005 110 33 26 -16 -9 -9 000 31 29 19 -23.1 -25.4 28.85 16 24 54 265 -008 102 33 16 -15 -9-10 000 32 29 20 -23.3 -25.5 28.86 14 22 59 270 005 103 20 16 -13 -9-11 000 33 29 21 -23.0 -25.3 28.87 16 24 68 279 005 102 18 24 -12-10-11 000 34 29 22 -22.3 -25.1 28.87 15 24 64 275 006 96 28 26 -11-10-10 000 35 29 23 -21.7 -24.3 28.88 15 26 62 273 013 97 25 33 -10 -9 -9 000 36 30 00 -20.4 -23.1 28.88 17 28 67 278 017 94 21 33 -9 -8 -9 000 37 30 01 -19.4 -22.3 28.87 17 29 71 282 002 92 29 34 -9 -8 -9 000 38 30 02 -18.9 -21.2 28.87 17 29 72 283 -003 97 32 32 -12 -8 -8 000 39 30 03 -18.5 -20.8 28.86 18 31 78 289 000 96 34 35 -11 -8 -9 000 40 30 04 -18.5 -20.7 28.86 17 30 75 286 -003 98 34 36 -11 -8 -9 000 41 30 05 -19.1 -21.0 28.85 16 27 71 282 -001 102 34 36 -12 -8 -9 000 42 30 06 -19.3 -21.2 28.84 17 28 74 285 000 102 34 36 -10 -9 -9 000 43 30 07 -19.3 -21.5 28.83 16 27 69 280 000 100 34 35 -10 -8 -9 000 44 30 08 -20.2 -22.0 28.82 14 25 65 277 -001 105 35 35 -10 -9 -9 000 45 30 09 -20.2 -22.2 28.80 14 25 69 280 000 101 35 33 -10 -9 -9 000 46 30 10 -20.1 -22.7 28.80 13 25 71 282 -005 94 33 33 -9 -9 -9 000 47 30 11 -20.0 -22.8 28.79 14 25 81 292 001 93 31 31 -9 -9 -9 000 48 30 12 -19.0 -23.0 28.78 14 25 82 293 -002 80 29 34 -8 -8 -9 000 49 30 13 -18.9 -22.8 28.77 14 24 81 292 -001 81 28 50 -8 -8 -9 000 50 30 14 -19.5 -22.9 28.77 13 24 81 292 -004 87 30 48 -8 -8 -9 000 51 30 15 -19.9 -22.9 28.75 13 24 79 290 -003 91 32 54 -8 -8 -9 000 52 30 16 -19.4 -23.0 28.74 12 23 77 288 000 84 33 48 -8 -8 -9 000 53 30 17 -19.5 -23.0 28.73 12 23 70 281 -001 85 33 46 -7 -8 -9 000 54 30 18 -19.6 -23.2 28.72 11 22 66 277 002 85 32 42 -7 -8 -9 000 55 30 19 -19.3 -23.1 28.71 11 21 60 271 000 82 31 40 -8 -8 -8 000 56 30 20 -18.8 -22.9 28.71 11 19 62 273 -003 79 36 46 -8 -9 -9 000 57 30 21 -18.3 -22.7 28.70 10 17 59 270 -002 74 39 49 -9-10 -9 000 58 30 22 -18.0 -22.8 28.70 9 13 53 264 -002 68 40 50 -10 -9-10 000 59 30 23 -17.5 -22.5 28.70 7 9 42 253 -002 65 38 51 -9 -9 -9 000 60 01 00 -15.8 -22.2 28.70 5 5 32 243 -001 63 36 52 -8 -8 -9 000 61 01 01 -14.9 -22.2 28.70 3 7 297 148 005 58 35 51 -9 -9 -9 000 62 01 02 -18.1 -22.2 28.71 4 11 250 101 000 80 36 48 -11 -9 -9 000 63 01 03 -19.6 -23.1 28.70 5 9 235 86 002 84 33 47 -10 -9 -9 000 64 01 04 -18.6 -22.7 28.69 3 6 230 81 -002 80 34 50 -9 -9-10 000 65 01 05 -18.8 -22.8 28.69 3 7 206 57 -001 81 37 49 -9-10-10 000 66 01 06 -19.0 -23.0 28.69 2 5 155 6 002 80 40 48 -10-10-10 000 67 01 07 -19.4 -23.0 28.70 2 4 111 322 000 83 36 51 -11-10-10 000 68 01 08 -19.5 -23.1 28.71 1 2 84 295 000 82 36 52 -11-10-10 000 69 01 09 -19.6 -23.1 28.71 2 7 306 157 000 83 44 53 -11-11-11 000 70 01 10 -22.5 -23.6 28.72 8 12 299 150 -001 110 50 53 -12-11-11 000 71 01 11 -22.1 -22.9 28.72 8 12 296 147 000 113 57 49 -13-11-12 000 72 01 12 -23.5 -24.0 28.73 8 12 306 157 000 123 51 47 -12-12-12 000 73 01 13 -23.6 -24.2 28.74 8 11 312 163 -001 123 73 48 -12-12-13 000 74 01 14 -25.3 -26.0 28.74 8 11 330 181 000 124 70 51 -13-13-13 000 75 01 15 -26.1 -26.6 28.75 9 13 344 195 002 128 69 54 -14-13-13 000 76 01 16 -23.7 -24.2 28.76 10 14 352 203 002 125 68 35 -13-12-12 000 77 01 17 -22.5 -23.0 28.77 10 15 359 210 001 124 74 41 -14-13-12 000 78 01 18 -22.2 -22.6 28.77 12 16 3 214 000 124 78 47 -17-12-12 000 79 01 19 -23.0 -23.4 28.77 12 16 16 227 002 125 87 49 -19-12-12 000 80 01 20 -23.6 -24.0 28.78 11 15 19 230 006 126 61 53 -20-11-11 000 81 01 21 -24.7 -25.2 28.78 11 14 18 229 003 127 48 53 -19-10-11 000 82 01 22 -25.8 -26.8 28.80 6 9 22 233 005 123 61 41 -22-13-11 000 83 01 23 -26.3 -27.4 28.81 5 9 42 253 006 124 73 28 -23-14-11 000 84 02 00 -26.3 -27.1 28.81 8 11 40 251 005 126 71 26 -21-14-12 000 85 02 01 -26.1 -27.1 28.81 10 13 31 242 -001 123 73 19 -21-14-13 000 86 02 02 -25.7 -26.4 28.81 11 16 25 236 -004 125 81 21 -21-15-13 000 87 02 03 -24.6 -25.3 28.81 11 17 22 233 001 123 83 29 -20-15-12 000 88 02 04 -25.6 -26.2 28.81 10 15 22 233 000 127 85 29 -22-16-12 000 89 02 05 -23.8 -24.4 28.81 10 15 21 232 000 126 81 31 -22-15-12 000 90 02 06 -23.7 -24.3 28.81 8 14 24 235 000 125 81 25 -23-15-12 000 91 02 07 -22.9 -23.4 28.81 10 13 22 233 000 124 81 21 -23-14-13 000 92 02 08 -22.9 -23.4 28.81 8 12 17 228 000 124 81 23 -23-14-13 000 93 02 09 -22.8 -23.4 28.81 6 11 18 229 -001 124 86 23 -23-15-13 000 94 02 10 -23.0 -23.6 28.81 4 9 34 245 -001 125 89 24 -23-15-13 000 95 02 11 -22.9 -23.4 28.81 5 9 42 253 -001 124 81 24 -23-14-13 000 96 02 12 -22.6 -23.1 28.81 6 11 37 248 000 124 81 24 -23-14-13 000 97 02 13 -22.7 -23.2 28.80 6 10 29 240 000 124 90 25 -23-16-13 000 98 02 14 -22.9 -23.6 28.79 5 9 31 242 000 124101 25 -23-17-13 000 99 02 15 -22.9 -23.4 28.78 5 9 26 237 000 124102 30 -23-17-12 000 100 02 16 -22.9 -24.0 28.76 5 8 27 238 -001 116107 38 -23-18-12 000 101 02 17 -22.9 -24.0 28.75 5 8 22 233 000 116112 50 -23-19-13 000 102 02 18 -22.8 -24.0 28.74 5 7 10 221 000 114115 60 -23-19-13 000 103 02 19 -22.8 -24.2 28.73 5 7 354 205 000 112118 66 -24-20-13 000 104 02 20 -22.7 -23.8 28.72 4 7 354 205 000 115118 60 -24-20-13 000 105 02 21 -22.5 -23.8 28.70 5 7 357 208 000 112117 60 -23-20-13 000 106 02 22 -22.3 -24.0 28.69 5 7 357 208 000 107120 58 -23-21-14 000 107 02 23 -22.4 -24.3 28.67 6 7 359 210 000 107122 59 -24-21-15 000 108 03 00 -22.8 -24.8 28.65 6 7 357 208 000 106121 61 -24-21-16 000 109 03 01 -23.2 -25.2 28.64 6 7 1 212 000 105121 65 -24-21-16 000 110 03 02 -23.5 -25.8 28.62 7 8 2 213 -001 103120 74 -24-20-16 000 111 03 03 -23.8 -26.2 28.60 8 9 358 209 000 101115 88 -24-20-17 001 112 03 04 -24.3 -26.8 28.58 9 11 356 207 000 101106 98 -24-21-17 005 113 03 05 -24.8 -27.4 28.57 10 13 356 207 000 100103102 -25-21-18 006 114 03 06 -25.4 -28.1 28.56 11 14 357 208 000 100101102 -25-21-18 008 115 03 07 -25.7 -28.5 28.55 12 17 357 208 000 99 98102 -25-20-18 011 116 03 08 -25.8 -28.6 28.54 13 18 359 210 000 100 98103 -25-20-18 009 117 03 09 -26.5 -29.2 28.54 12 17 10 221 003 101100104 -26-22-18 008 118 03 10 -27.3 -29.9 28.53 12 17 15 226 003 103 98104 -26-21-18 007 119 03 11 -28.5 -30.6 28.53 12 17 14 225 005 111 97104 -26-21-18 003 120 03 12 -28.7 -30.5 28.52 12 18 16 227 004 114 97104 -26-21-18 002 * 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.