USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-31/12 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 31 12 -7.8 -8.3 28.87 8 14 12 223 000 98 93 94 -7 -7 -8 000 1 31 13 -8.1 -8.3 28.88 10 15 8 219 000 108 98 95 -7 -7 -8 002 2 31 14 -8.4 -8.6 28.90 10 15 12 223 000 108 97 95 -7 -7 -8 000 3 31 15 -8.3 -8.4 28.91 10 15 12 223 000 108 94 96 -7 -7 -7 000 4 31 16 -8.5 -8.6 28.92 10 15 10 221 000 108 92 98 -7 -7 -7 000 5 31 17 -8.5 -8.6 28.92 10 14 12 223 000 108 90 99 -7 -7 -7 000 6 31 18 -8.2 -8.4 28.93 10 15 11 222 000 108 88 99 -7 -7 -7 000 7 31 19 -7.9 -8.3 28.94 11 16 10 221 000 105 87 98 -7 -7 -7 000 8 31 20 -7.7 -8.3 28.95 11 16 9 220 -001 104 86 97 -7 -7 -7 001 9 31 21 -7.3 -8.1 28.97 11 17 8 219 000 101 88 96 -7 -7 -7 000 10 31 22 -7.1 -8.1 28.99 11 16 8 219 001 98 89 93 -7 -7 -7 000 11 31 23 -6.8 -8.1 28.97 11 16 7 218 002 96 89 92 -7 -7 -7 000 12 01 00 -6.7 -8.0 28.98 11 15 5 216 002 95 92 94 -7 -7 -7 001 13 01 01 -6.8 -7.9 28.98 10 14 5 216 002 97 92 94 -7 -7 -7 001 14 01 02 -6.8 -8.1 28.99 10 13 9 220 002 96 93 96 -7 -7 -7 001 15 01 03 -6.7 -8.0 28.99 9 12 11 222 002 96 93 98 -7 -7 -7 001 16 01 04 -7.3 -8.4 29.00 9 12 16 227 001 98 93 97 -7 -7 -7 002 17 01 05 -7.9 -8.4 29.00 9 13 25 236 002 104 91 94 -7 -7 -7 000 18 01 06 -8.9 -9.2 29.00 9 14 29 240 001 108 91 91 -7 -7 -7 000 19 01 07 -10.1 -10.4 29.00 8 14 35 246 000 110 92 88 -6 -7 -7 000 20 01 08 -10.5 -10.8 28.99 8 14 31 242 000 110 93 90 -6 -7 -7 000 21 01 09 -10.6 -10.9 28.99 9 14 31 242 -002 110 90 95 -6 -6 -7 000 22 01 10 -10.7 -11.0 28.99 9 14 31 242 -004 110 91 97 -6 -6 -7 000 23 01 11 -10.0 -10.7 28.99 8 13 36 247 -001 105 92 95 -6 -6 -7 000 24 01 12 -9.4 -10.3 28.98 8 13 43 254 000 102 95 98 -6 -6 -7 000 25 01 13 -8.9 -9.9 28.98 8 14 37 248 000 101 95107 -6 -6 -7 000 26 01 14 -8.4 -10.0 28.98 9 15 44 255 000 94 92101 -6 -6 -7 000 27 01 15 -8.1 -9.3 28.97 9 16 43 254 000 97 92100 -6 -6 -7 001 28 01 16 -7.2 -8.6 28.96 11 17 37 248 002 96 88 96 -6 -7 -7 008 29 01 17 -7.7 -8.9 28.95 13 18 25 236 003 97105 92 -7 -7 -7 005 30 01 18 -7.8 -8.4 28.94 13 19 13 224 000 104102 92 -7 -7 -7 005 31 01 19 -7.3 -7.7 28.94 14 22 8 219 004 104 94 93 -7 -6 -6 006 32 01 20 -6.7 -7.1 28.95 16 23 1 212 -001 104100 97 -7 -6 -6 012 33 01 21 -6.3 -6.4 28.95 16 23 355 206 003 106107 88 -7 -7 -6 007 34 01 22 -5.7 -5.8 28.94 15 21 355 206 -018 106107 84 -6 -7 -7 000 35 01 23 -5.4 -5.5 28.94 13 18 356 207 -009 105107 79 -6 -7 -8 000 36 02 00 -5.2 -5.3 28.93 14 19 8 219 -001 105107 79 -6 -7 -8 000 37 02 01 -5.0 -5.1 28.92 15 20 4 215 -003 105107 83 -6 -7 -6 001 38 02 02 -4.8 -5.0 28.92 13 18 3 214 -003 103107 87 -6 -7 -6 000 39 02 03 -4.7 -4.9 28.91 11 17 1 212 -003 104106 89 -5 -6 -7 000 40 02 04 -4.9 -5.2 28.90 12 18 6 217 -005 103106 90 -6 -6 -6 001 41 02 05 -4.9 -5.4 28.89 12 18 12 223 -002 101101 92 -5 -6 -6 002 42 02 06 -5.2 -5.6 28.89 12 16 22 233 -004 102100 95 -5 -6 -6 002 43 02 07 -5.3 -5.8 28.88 11 15 31 242 -008 102100 96 -5 -6 -6 007 44 02 08 -5.3 -5.7 28.87 9 14 34 245 -010 101103 97 -6 -6 -6 010 45 02 09 -5.0 -5.2 28.87 10 13 27 238 000 104105 99 -5 -6 -6 005 46 02 10 -5.2 -5.7 28.86 7 10 38 249 004 101100100 -5 -5 -5 004 47 02 11 -4.8 -4.9 28.85 9 14 35 246 003 104105104 -5 -5 -5 010 48 02 12 -4.6 -4.7 28.84 10 15 35 246 -003 104103 95 -4 -4 -5 005 49 02 13 -4.6 -4.7 28.84 10 16 40 251 000 104104 89 -4 -4 -5 004 50 02 14 -5.2 -5.3 28.83 11 19 46 257 -004 105 86 90 -3 -4 -4 002 51 02 15 -5.1 -6.3 28.83 11 20 43 254 -003 94 85 98 -3 -4 -5 001 52 02 16 -5.0 -6.3 28.83 13 19 45 256 -004 93 86 96 -4 -4 -4 001 53 02 17 -4.9 -5.5 28.82 13 18 37 248 -002 100103 98 -4 -3 -4 007 54 02 18 -4.8 -5.1 28.82 13 18 30 241 -005 102103 94 -4 -3 -4 011 55 02 19 -4.6 -4.8 28.81 14 19 18 229 -006 103104 92 -5 -4 -4 016 56 02 20 -3.3 -3.3 28.81 15 18 356 207 -003 103105 95 -4 -5 -5 015 57 02 21 -3.1 -3.4 28.81 14 21 2 213 -005 100105 92 -4 -5 -6 016 58 02 22 -3.0 -3.5 28.82 16 21 349 200 -004 99104 94 -4 -5 -6 032 59 02 23 -2.6 -3.3 28.83 16 20 332 183 -003 97102 95 -4 -5 -6 038 60 03 00 -3.3 -3.9 28.83 14 19 321 172 000 98103 95 -4 -5 -6 026 61 03 01 -3.8 -4.1 28.84 13 19 325 176 000 101105 92 -5 -6 -6 012 62 03 02 -4.0 -4.2 28.84 13 19 332 183 000 103106 88 -5 -6 -6 007 63 03 03 -4.0 -4.2 28.85 13 18 332 183 -001 103106 86 -5 -6 -6 000 64 03 04 -4.2 -4.2 28.85 12 18 334 186 000 104106 79 -5 -6 -7 000 65 03 05 -3.9 -4.6 28.84 10 15 338 189 000 98106 84 -5 -6 -6 000 66 03 06 -3.9 -4.3 28.85 9 11 350 201 000 101106 80 -5 -6 -7 000 67 03 07 -3.9 -4.0 28.84 8 9 5 216 001 104106 86 -5 -6 -7 000 68 03 08 -4.0 -4.1 28.84 7 7 25 236 008 104106 92 -5 -6 -5 000 69 03 09 -4.4 -4.7 28.84 6 7 41 252 -001 102106 96 -5 -6 -4 000 70 03 10 -4.4 -4.7 28.83 7 8 41 252 000 103106 97 -5 -6 -5 000 71 03 11 -4.8 -4.9 28.83 7 9 72 283 001 104 96103 -5 -5 -5 000 72 03 12 -5.3 -5.4 28.82 7 8 85 296 001 105 98105 -6 -5 -5 000 73 03 13 -5.1 -5.2 28.81 8 9 86 297 000 105104102 -6 -5 -5 000 74 03 14 -4.6 -4.7 28.80 8 10 86 297 000 104101101 -5 -5 -5 000 75 03 15 -4.5 -4.6 28.79 9 10 91 302 001 104106 94 -5 -6 -5 000 76 03 16 -4.5 -4.6 28.77 10 11 99 310 003 104104 88 -5 -6 -5 000 77 03 17 -4.4 -4.9 28.76 11 13 114 325 000 101106 79 -5 -6 -4 000 78 03 18 -4.1 -4.3 28.75 12 15 121 332 -001 102106 74 -5 -6 -3 000 79 03 19 -4.0 -4.1 28.73 14 16 129 340 000 104106 73 -5 -6 -4 000 80 03 20 -4.0 -4.1 28.72 15 18 136 347 001 104106 83 -5 -6 -4 000 81 03 21 -3.8 -4.1 28.71 16 20 136 347 000 101106 79 -5 -6 -5 000 82 03 22 -3.6 -4.1 28.70 17 21 143 354 000 100106 72 -5 -6 -5 000 83 03 23 -3.6 -4.1 28.69 17 21 145 356 000 99106 68 -5 -6 -5 000 84 04 00 -3.6 -4.1 28.67 17 21 152 3 000 100106 63 -5 -6 -6 000 85 04 01 -3.6 -4.1 28.66 17 21 154 5 -005 100106 60 -5 -6 -6 000 86 04 02 -3.8 -4.3 28.66 17 21 159 10 -003 99106 59 -5 -6 -6 000 87 04 03 -3.9 -4.2 28.65 17 21 164 15 -005 101106 57 -5 -6 -7 000 88 04 04 -4.1 -4.4 28.64 17 22 166 17 000 102106 58 -5 -6 -7 000 89 04 05 -4.2 -4.3 28.63 17 21 170 21 -002 104106 55 -5 -6 -7 000 90 04 06 -4.6 -4.7 28.63 16 22 173 24 -003 104106 57 -5 -6 -7 000 91 04 07 -4.6 -4.7 28.63 15 19 169 20 -007 104106 67 -5 -6 -7 000 92 04 08 -4.7 -4.8 28.62 15 19 171 22 -006 104106 69 -5 -6 -6 000 93 04 09 -4.9 -5.3 28.62 15 18 173 24 -004 102107 71 -6 -7 -4 000 94 04 10 -4.8 -5.0 28.62 14 17 176 27 001 103107 73 -6 -7 -7 000 95 04 11 -4.5 -4.6 28.63 11 14 185 36 006 104106 75 -5 -6 -8 000 96 04 12 -4.6 -4.6 28.64 11 14 186 37 003 104107 77 -5 -7 -8 000 97 04 13 -4.8 -4.9 28.64 12 15 195 46 000 104107 78 -5 -7 -8 000 98 04 14 -5.1 -5.2 28.64 11 14 202 53 -001 105107 81 -6 -7 -8 000 99 04 15 -5.2 -5.4 28.65 10 12 205 56 -002 104107 84 -6 -7 -8 000 100 04 16 -5.3 -5.6 28.65 10 12 220 71 -001 102107 84 -6 -7 -8 000 101 04 17 -5.3 -5.7 28.66 10 11 226 77 000 102107 84 -6 -7 -8 000 102 04 18 -5.1 -5.7 28.67 8 9 230 81 000 100107 86 -6 -7 -8 000 103 04 19 -4.9 -5.4 28.67 8 9 245 96 -001 100107 90 -6 -7 -8 000 104 04 20 -4.8 -5.5 28.68 8 8 255 106 000 99107 89 -6 -7 -8 000 105 04 21 -4.8 -5.6 28.69 7 8 265 116 000 98107 88 -6 -7 -8 000 106 04 22 -4.8 -5.7 28.71 6 7 280 131 000 97107 90 -6 -7 -8 000 107 04 23 -4.9 -5.4 28.72 6 6 295 146 000 100107 92 -6 -7 -8 000 108 05 00 -4.8 -4.9 28.72 6 7 295 146 000 105107 90 -6 -7 -8 000 109 05 01 -5.3 -5.3 28.73 7 7 293 144 000 105107 93 -6 -7 -8 000 110 05 02 -5.4 -5.4 28.73 6 7 308 159 000 105107 96 -6 -7 -8 000 111 05 03 -5.3 -6.0 28.73 5 8 326 177 000 99101 97 -6 -7 -8 000 112 05 04 -5.7 -6.0 28.73 6 10 329 180 000 104102 94 -6 -7 -7 000 113 05 05 -6.4 -6.7 28.73 6 9 331 182 000 106 99 95 -6 -7 -8 001 114 05 06 -6.5 -6.6 28.74 4 9 327 178 000 106107 96 -6 -7 -7 001 115 05 07 -8.5 -8.6 28.75 4 6 332 183 000 108106 89 -6 -7 -8 000 116 05 08 -9.9 -10.0 28.75 4 4 319 170 000 110101 86 -6 -7 -8 000 117 05 09 -10.3 -10.4 28.76 4 5 325 176 000 110 98 86 -6 -7 -7 000 118 05 10 -9.5 -9.7 28.77 6 7 326 177 000 109 73 88 -8 -7 -7 000 119 05 11 -9.6 -9.7 28.78 6 8 318 169 000 109 87 87 -10 -7 -7 000 120 05 12 -8.5 -8.7 28.78 6 10 327 178 -001 108110 85 -9 -9 -7 000 * 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.