USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-28/00 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 28 00 -16.2 -19.4 28.88 3 4 258 109 000 79 71 61 -16-15-15 000 1 28 01 -16.4 -19.6 28.88 3 4 241 92 000 87 75 65 -16-15-15 000 2 28 02 -16.6 -19.3 28.87 2 4 240 91 001 91 76 65 -16-15-15 000 3 28 03 -17.1 -19.6 28.85 2 3 253 104 000 93 76 65 -16-15-15 000 4 28 04 -17.4 -19.8 28.85 2 3 285 136 000 96 76 62 -16-15-15 000 5 28 05 -18.1 -20.2 28.85 3 3 301 152 001 99 76 56 -16-15-15 000 6 28 06 -18.7 -20.7 28.86 3 4 301 152 000 101 75 50 -16-15-15 000 7 28 07 -19.2 -21.0 28.83 3 5 294 145 000 102 75 48 -16-16-15 000 8 28 08 -19.8 -21.4 28.83 4 5 292 143 000 105 74 45 -16-16-15 000 9 28 09 -19.9 -21.2 28.84 3 4 288 139 000 107 72 44 -16-15-15 000 10 28 10 -20.0 -21.3 28.84 3 4 285 136 000 108 70 44 -16-15-15 000 11 28 11 -20.0 -21.3 28.83 3 3 291 142 000 107 70 46 -16-15-15 000 12 28 12 -19.9 -21.4 28.81 2 3 301 152 000 105 72 47 -16-15-15 000 13 28 13 -19.8 -21.4 28.81 2 3 296 147 000 104 72 46 -16-15-15 000 14 28 14 -19.6 -21.3 28.81 2 3 290 141 000 103 72 46 -16-15-15 000 15 28 15 -19.3 -21.2 28.81 2 3 291 142 000 101 72 47 -16-15-15 000 16 28 16 -19.0 -21.1 28.82 2 3 295 146 000 99 72 47 -16-15-15 000 17 28 17 -18.5 -21.0 28.81 2 3 290 141 000 96 71 47 -16-15-15 000 18 28 18 -18.1 -20.8 28.80 2 2 287 138 000 93 70 46 -15-15-15 000 19 28 19 -17.6 -20.6 28.80 1 2 290 141 000 90 70 46 -15-15-15 000 20 28 20 -17.2 -20.1 28.79 1 1 295 146 000 88 70 45 -15-15-15 000 21 28 21 -16.8 -19.8 28.78 1 1 292 143 000 90 68 44 -15-15-15 000 22 28 22 -16.4 -19.2 28.77 1 2 302 153 000 92 67 43 -15-15-14 000 23 28 23 -16.1 -18.6 28.76 0 1 318 169 000 94 66 42 -15-15-14 000 24 29 00 -16.0 -18.9 28.76 1 1 315 166 000 90 65 40 -15-14-14 000 25 29 01 -16.1 -18.6 28.76 1 1 310 161 000 91 64 37 -15-14-14 000 26 29 02 -16.3 -18.9 28.75 0 0 208 59 000 93 62 35 -15-14-14 000 27 29 03 -16.8 -19.0 28.75 1 1 105 316 000 96 61 33 -14-14-14 000 28 29 04 -17.2 -19.3 28.75 2 2 68 279 000 99 60 33 -14-14-14 000 29 29 05 -17.7 -20.0 28.73 3 3 52 263 000 96 59 32 -14-14-14 000 30 29 06 -18.7 -21.0 28.72 4 5 41 252 000 96 58 32 -14-14-14 000 31 29 07 -19.5 -21.7 28.71 5 6 35 246 000 97 56 32 -14-14-13 000 32 29 08 -19.9 -22.1 28.71 6 7 35 246 000 98 53 32 -14-13-13 000 33 29 09 -20.1 -22.3 28.70 6 7 35 246 000 97 52 31 -13-13-13 000 34 29 10 -20.0 -22.3 28.70 6 7 36 247 000 96 50 30 -13-13-13 000 35 29 11 -19.8 -22.3 28.69 6 7 37 248 000 94 49 29 -13-13-13 000 36 29 12 -19.7 -22.3 28.69 6 7 39 250 000 92 48 29 -13-13-13 000 37 29 13 -19.6 -22.3 28.68 7 8 41 252 000 91 46 28 -13-13-12 000 38 29 14 -19.4 -22.2 28.68 7 9 44 255 000 89 43 28 -12-12-12 000 39 29 15 -18.8 -21.8 28.67 8 9 46 257 000 88 41 28 -12-12-12 000 40 29 16 -18.0 -21.0 28.67 8 10 47 258 000 88 40 28 -12-11-12 000 41 29 17 -17.2 -20.0 28.67 8 11 48 259 000 90 38 28 -11-11-11 000 42 29 18 -16.4 -19.3 28.66 8 12 49 260 000 88 36 28 -11-11-11 000 43 29 19 -15.5 -18.8 28.66 8 13 47 258 000 85 35 28 -11-10-11 000 44 29 20 -14.6 -18.2 28.66 7 12 45 256 000 81 33 27 -11-10-10 000 45 29 21 -13.8 -17.7 28.65 7 12 43 254 000 78 31 28 -10-10-10 000 46 29 22 -13.1 -17.4 28.65 7 11 42 253 000 74 30 27 -10 -9-10 000 47 29 23 -12.6 -17.3 28.66 7 11 41 252 000 70 30 29 -9 -9 -9 000 48 30 00 -12.4 -17.5 28.65 7 11 44 255 000 65 26 28 -9 -9 -9 000 49 30 01 -12.3 -17.7 28.64 7 11 48 259 000 62 23 34 -8 -8 -9 000 50 30 02 -12.0 -17.8 28.64 7 11 53 264 000 60 24 35 -8 -8 -9 000 51 30 03 -11.7 -17.4 28.64 7 12 57 268 000 60 24 31 -8 -8 -9 000 52 30 04 -11.6 -17.5 28.65 8 13 59 270 000 58 24 35 -8 -8 -8 000 53 30 05 -11.5 -17.4 28.65 8 14 58 269 000 59 24 46 -7 -8 -8 000 54 30 06 -11.5 -17.2 28.64 8 14 55 266 000 60 25 47 -7 -8 -8 000 55 30 07 -11.3 -16.8 28.64 8 14 52 263 000 61 35 47 -7 -8 -8 000 56 30 08 -10.9 -16.1 28.63 8 13 50 261 001 63 47 65 -7 -7 -8 000 57 30 09 -10.8 -15.4 28.63 8 13 43 254 000 69 44 80 -7 -7 -8 000 58 30 10 -10.9 -13.9 28.64 8 12 38 249 -001 84 50 98 -8 -8 -8 000 59 30 11 -10.7 -12.2 28.64 6 10 35 246 000 97 87107 -9 -8 -8 005 60 30 12 -10.3 -11.5 28.64 6 10 37 248 000 100 96101 -9 -8 -8 013 61 30 13 -10.1 -11.2 28.65 7 11 30 241 000 101 97101 -9 -9 -9 010 62 30 14 -10.0 -10.9 28.66 8 12 25 236 000 103 95 99 -8 -8 -8 007 63 30 15 -9.9 -10.5 28.66 9 12 21 233 001 105 94100 -8 -7 -8 004 64 30 16 -9.4 -10.2 28.67 9 12 20 231 001 103 98101 -7 -8 -8 004 65 30 17 -8.7 -9.5 28.68 8 13 18 229 000 102100 99 -7 -8 -9 006 66 30 18 -7.9 -8.6 28.68 8 12 23 234 000 102100 98 -7 -8 -8 003 67 30 19 -7.1 -7.4 28.68 9 13 23 234 000 104 99 96 -7 -8 -8 002 68 30 20 -6.3 -6.8 28.69 9 13 22 233 000 103105 93 -7 -8 -8 003 69 30 21 -6.0 -6.3 28.71 10 12 26 237 001 104108 94 -7 -8 -9 002 70 30 22 -6.3 -6.3 28.72 9 10 11 222 -002 106108 96 -7 -8 -8 000 71 30 23 -6.3 -6.5 28.74 9 10 0 211 000 105109101 -7 -9 -8 000 72 31 00 -5.9 -6.4 28.75 8 10 354 205 000 102108 99 -7 -8 -9 000 73 31 01 -5.9 -6.8 28.76 7 10 338 189 000 98101 98 -7 -8 -8 000 74 31 02 -6.7 -7.3 28.76 5 9 352 203 000 102100104 -6 -7 -8 000 75 31 03 -7.0 -7.3 28.77 6 11 358 209 000 105102102 -7 -8 -8 000 76 31 04 -7.3 -7.4 28.78 8 11 0 211 001 107 94100 -7 -7 -7 000 77 31 05 -7.3 -7.5 28.79 9 13 359 210 000 107 86102 -7 -6 -6 000 78 31 06 -7.3 -7.5 28.80 7 10 4 215 000 107 89 97 -6 -7 -6 000 79 31 07 -8.0 -8.1 28.81 6 12 16 227 000 108 90 91 -6 -6 -6 000 80 31 08 -8.8 -8.9 28.82 5 11 21 232 000 108 91 90 -6 -6 -6 000 81 31 09 -8.8 -8.9 28.83 4 9 44 255 002 108 90 91 -6 -6 -6 000 82 31 10 -7.8 -8.0 28.84 5 11 45 256 -002 107 90 93 -6 -6 -6 000 83 31 11 -7.3 -7.6 28.85 6 11 40 251 000 106 87 93 -6 -6 -6 000 84 31 12 -7.2 -7.5 28.86 7 10 41 252 -002 106 85 97 -6 -6 -6 000 85 31 13 -7.0 -7.3 28.87 7 11 38 249 -001 105 82 97 -6 -6 -6 000 86 31 14 -8.6 -8.9 28.88 8 13 35 246 001 108 82 95 -5 -5 -6 000 87 31 15 -6.7 -7.5 28.89 8 13 38 249 001 100 85109 -5 -6 -7 000 88 31 16 -6.6 -7.6 28.90 8 13 37 248 -003 97 89102 -5 -6 -7 000 89 31 17 -7.1 -7.3 28.91 9 15 40 251 -002 107 87 97 -5 -6 -7 000 90 31 18 -7.1 -7.4 28.92 10 15 37 248 -003 106 89 87 -6 -6 -7 000 91 31 19 -6.2 -7.2 28.93 11 16 35 246 -003 98 88 91 -6 -6 -7 000 92 31 20 -5.9 -6.9 28.94 10 15 35 246 -003 97 92 93 -6 -6 -7 000 93 31 21 -5.5 -6.6 28.95 10 14 39 250 -003 96 90 89 -5 -5 -6 000 94 31 22 -5.1 -6.5 28.96 11 14 47 258 -002 93 88 95 -5 -5 -6 000 95 31 23 -5.4 -6.7 28.97 11 15 44 255 -006 94 91 99 -5 -5 -6 000 96 01 00 -5.6 -6.8 28.98 11 17 44 255 -008 95 89 96 -5 -5 -6 000 97 01 01 -5.9 -7.1 28.98 11 19 41 252 -010 95 85 96 -5 -6 -7 000 98 01 02 -6.6 -7.0 28.99 12 19 38 249 -005 104 84100 -5 -6 -7 000 99 01 03 -6.9 -7.0 28.98 13 18 36 247 -002 107103 87 -6 -6 -7 000 100 01 04 -6.5 -6.7 28.98 13 19 32 243 -002 106101 83 -6 -6 -7 001 101 01 05 -5.4 -5.9 28.99 14 20 22 233 -004 102106 80 -5 -6 -7 004 102 01 06 -5.4 -5.5 28.99 14 19 15 226 -002 105104 84 -5 -6 -7 000 103 01 07 -5.3 -5.4 29.00 14 18 14 225 -004 105 96 87 -6 -6 -6 000 104 01 08 -5.5 -5.6 29.00 14 20 15 226 -003 105 93 87 -6 -6 -6 000 105 01 09 -5.9 -6.0 29.01 14 20 13 224 -002 106 90 86 -5 -6 -5 000 106 01 10 -6.3 -6.4 29.01 14 21 13 224 -002 106 87 82 -5 -5 -4 000 107 01 11 -7.0 -7.2 29.01 14 21 13 224 -006 107 89 80 -5 -5 -4 000 108 01 12 -8.1 -8.3 29.01 11 19 16 227 -005 108 86 81 -4 -4 -4 000 109 01 13 -8.3 -8.5 29.00 11 19 18 229 -007 108 87 85 -4 -4 -3 000 110 01 14 -7.4 -7.6 28.99 11 18 21 232 -002 107 89 87 -4 -4 -4 000 111 01 15 -7.1 -7.3 28.99 9 17 33 244 -001 107 87 86 -4 -4 -4 000 112 01 16 -7.0 -7.2 28.99 10 17 35 246 -003 106 92 83 -4 -4 -4 000 113 01 17 -5.6 -6.4 28.98 11 18 37 248 -003 99 91 81 -3 -4 -4 000 114 01 18 -4.4 -5.2 28.97 13 18 38 249 000 97 94 78 -3 -4 -4 000 115 01 19 -4.3 -4.6 28.96 13 17 39 250 000 102 87 78 -3 -4 -3 000 116 01 20 -4.0 -4.5 28.95 12 17 42 253 001 99 85 78 -3 -3 -4 000 117 01 21 -4.3 -4.9 28.95 11 16 51 262 001 99 81 82 -2 -3 -3 000 118 01 22 -3.7 -4.7 28.94 10 17 53 264 003 95 78 89 -2 -2 -3 000 119 01 23 -3.3 -4.7 28.93 10 16 51 262 003 90 75 89 -2 -2 -3 000 120 02 00 -3.2 -4.8 28.92 9 15 56 267 001 89 70 85 -1 -2 -3 000 * 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.