USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-19/12 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 19 12 -17.3 -19.9 28.62 5 8 188 39 000 84 62 35 -14-13-13 000 1 19 13 -18.4 -19.1 28.63 6 10 181 32 -003 117 61 34 -14-13-13 000 2 19 14 -18.0 -19.0 28.62 6 11 201 52 -003 113 62 33 -13-13-13 000 3 19 15 -17.5 -18.5 28.64 6 11 211 62 -003 111 61 32 -13-13-13 000 4 19 16 -16.8 -17.9 28.64 6 11 212 63 -003 110 60 31 -13-13-13 000 5 19 17 -16.3 -17.4 28.64 5 10 217 68 -002 109 57 29 -13-12-13 000 6 19 18 -15.7 -17.3 28.65 6 9 216 67 -003 101 54 30 -13-12-12 000 7 19 19 -15.0 -17.2 28.65 6 11 212 63 -002 95 51 28 -13-12-12 000 8 19 20 -14.4 -17.0 28.67 7 11 215 66 -003 91 49 29 -13-12-12 000 9 19 21 -14.0 -16.9 28.66 9 13 218 69 -003 88 50 31 -13-12-13 000 10 19 22 -13.8 -16.7 28.69 11 16 216 67 -002 87 55 31 -13-13-13 000 11 19 23 -13.9 -16.7 28.70 11 16 219 70 000 89 56 31 -14-13-13 000 12 20 00 -14.0 -16.6 28.71 12 17 223 74 000 91 53 30 -14-13-13 000 13 20 01 -14.0 -16.6 28.72 10 15 225 76 001 90 49 31 -14-13-13 000 14 20 02 -14.3 -16.4 28.74 11 15 234 85 003 95 49 30 -14-13-13 000 15 20 03 -14.8 -16.1 28.77 12 18 238 89 001 104 49 31 -15-14-13 000 16 20 04 -14.7 -15.0 28.78 15 21 238 89 000 115 55 28 -16-14-13 000 17 20 05 -14.2 -14.5 28.79 15 22 236 87 002 114 57 27 -15-14-13 000 18 20 06 -14.1 -14.4 28.79 16 23 235 86 003 114 55 24 -14-14-13 000 19 20 07 -14.5 -14.8 28.81 17 25 234 85 007 115 56 22 -14-14-14 000 20 20 08 -14.8 -15.1 28.83 19 26 233 84 007 115 57 25 -14-14-14 000 21 20 09 -15.2 -15.5 28.85 19 27 234 85 010 115 61 35 -14-14-14 000 22 20 10 -15.6 -16.0 28.87 18 28 236 87 011 116 62 24 -14-13-13 000 23 20 11 -15.6 -16.6 28.90 20 29 232 83 012 108 64 49 -14-14-13 000 24 20 12 -15.5 -16.8 28.91 20 31 232 83 025 105 56 29 -14-13-13 000 25 20 13 -15.6 -17.2 28.95 19 30 230 81 022 102 55 32 -14-13-13 000 26 20 14 -15.8 -17.1 28.97 19 30 228 79 024 105 87 43 -15-13-13 000 27 20 15 -15.4 -16.6 29.01 19 32 228 79 022 106 39 52 -13-12-13 000 28 20 16 -15.4 -17.2 29.04 17 28 237 88 016 100 36 44 -13-12-13 000 29 20 17 -15.0 -17.6 29.06 14 26 247 98 013 91 35 40 -13-13-13 000 30 20 18 -13.8 -17.8 29.09 16 27 254 105 008 77 36 43 -12-12-13 000 31 20 19 -13.3 -17.7 29.12 15 24 244 95 007 74 38 48 -13-13-13 000 32 20 20 -12.9 -17.3 29.14 13 22 244 95 008 74 43 48 -13-12-13 000 33 20 21 -12.5 -17.0 29.15 12 18 250 101 007 72 40 48 -12-12-13 000 34 20 22 -12.1 -16.8 29.16 11 16 254 105 001 70 39 49 -12-12-13 000 35 20 23 -11.7 -16.6 29.18 9 13 261 112 000 69 36 46 -11-12-13 000 36 21 00 -11.4 -16.2 29.19 7 11 266 117 001 69 34 46 -11-12-13 000 37 21 01 -11.3 -15.8 29.20 6 9 277 128 000 71 37 42 -11-12-13 000 38 21 02 -11.4 -15.6 29.20 5 8 291 142 000 72 35 40 -11-12-13 000 39 21 03 -11.7 -15.3 29.20 5 8 305 156 000 76 36 40 -11-12-13 000 40 21 04 -12.3 -15.3 29.20 6 9 312 163 000 83 37 41 -11-12-13 000 41 21 05 -13.2 -16.2 29.20 6 10 312 163 -001 83 35 38 -11-12-12 000 42 21 06 -14.2 -17.3 29.20 6 10 304 155 -001 83 36 37 -11-12-12 000 43 21 07 -15.0 -18.3 29.20 6 10 290 141 000 81 41 38 -12-12-13 000 44 21 08 -15.3 -19.2 29.20 7 10 271 122 -001 75107 38 -12-12-13 000 45 21 09 -14.8 -18.5 29.20 4 10 261 112 -001 80106 38 -12-13-13 000 46 21 10 -14.2 -17.3 29.19 4 9 263 114 000 87 97 42 -11-13-14 000 47 21 11 -14.4 -16.5 29.19 4 10 258 109 000 95 98 49 -11-12-14 000 48 21 12 -14.8 -16.2 29.19 4 10 256 107 000 102 99 68 -11-13-14 000 49 21 13 -15.1 -16.0 29.19 5 11 245 96 000 109100 69 -11-13-14 000 50 21 14 -12.8 -14.4 29.19 4 9 220 71 -002 99110 81 -12-13-14 000 51 21 15 -12.0 -15.2 29.19 4 10 225 76 -003 84107 94 -12-13-15 000 52 21 16 -12.5 -15.4 29.19 4 9 246 97 -003 82105105 -12-13-14 000 53 21 17 -11.8 -16.6 29.18 5 12 221 72 000 69100108 -12-13-14 000 54 21 18 -11.2 -15.3 29.17 7 12 214 65 -001 76112103 -12-13-14 000 55 21 19 -10.7 -13.5 29.17 8 11 226 77 -001 86111108 -12-13-15 000 56 21 20 -10.3 -12.3 29.17 8 12 239 90 000 93111 99 -12-13-14 000 57 21 21 -10.1 -12.0 29.17 10 12 219 70 -001 93112109 -11-13-14 000 58 21 22 -10.3 -11.4 29.16 9 10 216 67 -002 100113115 -12-13-14 000 59 21 23 -10.6 -11.9 29.16 9 11 221 72 -002 99114104 -12-13-15 000 60 22 00 -10.7 -11.9 29.15 9 11 221 72 -001 99114108 -12-13-15 000 61 22 01 -10.9 -11.8 29.14 9 10 215 66 -002 103114110 -12-13-15 000 62 22 02 -11.1 -12.4 29.14 9 10 211 62 000 100114 94 -12-14-15 000 63 22 03 -11.4 -13.1 29.13 9 10 201 52 000 96115 67 -13-14-15 000 64 22 04 -12.7 -12.9 29.12 8 9 196 47 -001 112116 74 -14-15-15 000 65 22 05 -13.0 -14.6 29.12 6 8 187 38 000 99 93 67 -14-15-16 000 66 22 06 -14.3 -15.2 29.11 4 6 165 16 -001 110 80 68 -14-15-16 000 67 22 07 -14.8 -15.1 29.11 5 7 153 4 -001 115 89 70 -14-15-16 000 68 22 08 -15.3 -15.4 29.10 3 6 163 14 -001 116 87 74 -14-15-16 000 69 22 09 -16.2 -16.4 29.09 2 3 193 44 000 117 79 73 -15-15-16 000 70 22 10 -17.2 -17.6 29.08 3 9 218 69 -001 118 81 61 -15-15-16 000 71 22 11 -17.8 -18.5 29.08 4 10 209 60 -001 118 77 63 -14-15-16 000 72 22 12 -17.9 -18.6 29.07 4 11 209 60 -001 118 76 60 -14-15-16 000 73 22 13 -17.9 -18.5 29.07 5 12 210 61 000 118 81 60 -14-15-16 000 74 22 14 -17.7 -18.2 29.06 5 12 207 58 000 118 78 58 -14-15-16 000 75 22 15 -17.2 -17.5 29.05 4 11 201 52 -001 118 64 56 -14-15-16 000 76 22 16 -16.8 -17.0 29.05 5 10 189 40 -001 117 73 53 -14-15-16 000 77 22 17 -16.5 -16.7 29.04 4 9 200 51 -001 117 79 50 -14-15-16 000 78 22 18 -15.9 -16.1 29.04 5 9 202 53 000 116 83 49 -15-15-16 000 79 22 19 -15.4 -15.5 29.04 6 10 197 48 -001 116 92 50 -15-16-17 000 80 22 20 -14.8 -14.9 29.04 8 11 186 37 -001 115104 49 -16-16-17 000 81 22 21 -14.3 -14.4 29.04 9 13 180 31 000 115 92 48 -16-16-17 000 82 22 22 -14.4 -14.6 29.04 10 14 174 25 -001 115 81 50 -16-16-16 000 83 22 23 -14.2 -15.8 29.04 9 14 175 26 -001 100 80 49 -15-16-17 000 84 23 00 -14.1 -15.8 29.04 9 14 179 30 -001 100 77 47 -15-16-16 000 85 23 01 -14.1 -16.0 29.04 9 14 185 36 000 97 66 48 -15-15-16 000 86 23 02 -14.1 -16.3 29.04 9 14 189 40 -001 95 63 48 -15-15-16 000 87 23 03 -14.4 -16.4 29.04 9 14 191 42 -001 97 61 48 -14-15-16 000 88 23 04 -14.7 -16.2 29.04 9 13 195 46 -001 102 56 50 -15-15-16 000 89 23 05 -15.1 -16.1 29.03 8 13 201 52 -001 108 58 56 -15-15-16 000 90 23 06 -15.6 -16.0 29.03 8 13 207 58 -001 116 59 61 -15-15-15 000 91 23 07 -15.7 -16.0 29.02 9 13 202 53 -002 116 54 61 -15-15-15 000 92 23 08 -15.6 -15.9 29.02 9 14 203 54 -002 116 59 60 -15-15-15 000 93 23 09 -16.0 -16.3 29.03 8 14 206 57 -003 116 60 58 -15-15-15 000 94 23 10 -16.8 -17.1 29.03 7 14 209 60 -004 117 48 54 -14-15-15 000 95 23 11 -17.4 -17.7 29.02 7 14 215 66 -004 118 51 53 -14-15-15 000 96 23 12 -17.6 -17.9 29.02 7 13 214 65 -003 118 57 50 -14-15-15 000 97 23 13 -17.5 -17.8 29.01 7 12 204 55 -002 118 57 46 -15-15-15 000 98 23 14 -17.0 -17.3 29.01 6 11 195 46 -001 118 60 45 -15-15-15 000 99 23 15 -16.9 -17.2 29.01 5 10 189 40 000 118 71 51 -15-15-15 000 100 23 16 -16.6 -16.8 29.01 4 10 188 39 001 117 68 56 -14-15-16 000 101 23 17 -15.6 -16.9 29.01 4 10 194 45 003 105 53 62 -14-14-15 000 102 23 18 -14.7 -17.3 29.01 5 9 192 43 003 91 52 67 -14-14-15 000 103 23 19 -14.0 -17.3 29.01 5 9 191 42 002 85 50 66 -14-14-15 000 104 23 20 -13.7 -17.1 29.01 6 8 191 42 000 83 49 66 -14-14-15 000 105 23 21 -13.4 -17.3 29.01 5 7 189 40 000 80 50 65 -14-14-15 000 106 23 22 -13.2 -17.5 29.02 5 7 183 34 002 76 52 66 -14-14-15 000 107 23 23 -13.0 -17.1 29.02 5 6 178 29 000 78 51 65 -14-14-15 000 108 24 00 -12.9 -17.0 29.02 5 6 172 23 000 78 50 59 -14-14-15 000 109 24 01 -12.9 -16.8 29.02 5 6 169 20 000 79 50 53 -14-14-15 000 110 24 02 -13.1 -16.5 29.02 5 7 168 19 000 82 54 47 -13-14-15 000 111 24 03 -13.3 -16.2 29.01 5 7 169 20 001 87 59 42 -13-14-14 000 112 24 04 -13.8 -16.1 29.01 5 7 170 21 000 93 65 39 -13-14-14 000 113 24 05 -14.5 -16.1 29.00 6 8 168 19 000 100 67 36 -13-13-14 000 114 24 06 -15.3 -16.2 29.01 6 8 166 17 000 109 54 43 -13-13-14 000 115 24 07 -16.1 -17.2 29.01 5 9 164 15 000 110 42 39 -13-13-13 000 116 24 08 -16.8 -18.2 29.00 6 10 161 12 000 105 45 32 -13-12-12 000 117 24 09 -17.2 -19.0 29.00 6 10 162 13 000 101 44 32 -12-11-12 000 118 24 10 -17.4 -19.4 29.00 6 11 160 11 000 99 30 61 -11-11-11 000 119 24 11 -17.1 -19.5 29.00 6 11 164 15 000 93 41 48 -11-10-11 000 120 24 12 -16.9 -19.2 28.99 6 12 159 10 001 94 55 48 -11-10-10 000 * 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.