USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2025-12-19/00 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 19 00 -14.8 -18.2 28.61 11 13 178 29 000 73 35 22 -13-13-13 000 1 19 01 -14.8 -17.8 28.61 12 17 178 29 -001 87 39 23 -14-13-13 000 2 19 02 -14.7 -17.7 28.62 12 17 182 33 -002 88 40 23 -14-13-12 000 3 19 03 -15.0 -17.4 28.62 11 16 185 36 -003 93 43 24 -14-13-12 000 4 19 04 -15.3 -17.3 28.62 11 16 188 39 -002 98 48 26 -14-13-12 000 5 19 05 -15.7 -17.1 28.64 10 15 194 45 -002 104 52 28 -14-13-12 000 6 19 06 -16.2 -16.8 28.62 9 14 199 50 -002 114 55 29 -14-13-13 000 7 19 07 -16.9 -17.3 28.60 8 13 203 54 -002 117 58 31 -14-13-13 000 8 19 08 -17.5 -17.9 28.63 7 13 207 58 -004 118 56 32 -13-13-13 000 9 19 09 -18.0 -18.5 28.62 6 13 212 63 -003 119 56 34 -13-13-13 000 10 19 10 -18.2 -18.7 28.61 7 14 215 66 -003 119 56 34 -13-13-13 000 11 19 11 -18.1 -18.6 28.64 7 14 218 69 -003 119 55 30 -13-13-13 000 12 19 12 -17.9 -18.4 28.64 7 16 219 70 -003 118 56 26 -12-13-12 000 13 19 13 -17.5 -17.9 28.62 7 16 219 70 -003 118 56 25 -12-12-12 000 14 19 14 -16.9 -17.3 28.63 7 15 223 74 -004 117 54 26 -12-12-12 000 15 19 15 -16.4 -16.8 28.64 7 15 222 73 -003 117 51 25 -12-12-12 000 16 19 16 -15.6 -16.0 28.64 7 14 223 74 -003 116 49 24 -12-12-12 000 17 19 17 -14.7 -15.5 28.65 8 14 223 74 -002 109 44 24 -12-12-12 000 18 19 18 -13.9 -15.4 28.65 9 14 220 71 -002 101 45 24 -12-12-12 000 19 19 19 -13.4 -15.4 28.66 10 15 223 74 -002 96 46 25 -12-11-12 000 20 19 20 -13.1 -15.3 28.68 10 15 223 74 -002 94 44 25 -12-11-11 000 21 19 21 -13.0 -15.4 28.68 10 15 223 74 -001 92 42 27 -12-11-11 000 22 19 22 -13.0 -15.4 28.69 10 15 228 79 000 91 38 30 -12-11-11 000 23 19 23 -12.9 -15.3 28.70 11 15 233 84 001 91 36 30 -12-11-11 000 24 20 00 -12.8 -15.4 28.71 11 16 236 87 001 89 35 34 -12-11-11 000 25 20 01 -12.6 -15.7 28.72 11 16 239 90 002 85 35 32 -12-11-12 000 26 20 02 -12.7 -15.6 28.74 12 17 243 94 001 86 38 32 -12-12-12 000 27 20 03 -13.2 -15.3 28.76 12 18 248 99 002 95 38 33 -12-12-12 000 28 20 04 -14.3 -14.5 28.76 13 19 248 99 000 114 38 29 -12-12-12 000 29 20 05 -13.9 -14.1 28.77 14 20 246 97 -001 114 38 27 -13-12-11 000 30 20 06 -13.6 -14.1 28.79 15 22 246 97 -003 112 48 25 -13-13-12 000 31 20 07 -13.3 -13.6 28.80 17 24 242 93 003 113 60 23 -14-13-13 000 32 20 08 -13.5 -13.8 28.82 18 25 241 92 001 114 60 24 -13-13-13 000 33 20 09 -13.9 -14.2 28.84 17 26 244 95 001 114 68 43 -13-13-13 000 34 20 10 -14.1 -14.4 28.85 18 27 240 91 011 114 73 39 -14-13-12 000 35 20 11 -14.5 -14.8 28.87 18 26 240 91 013 115 75 44 -14-13-12 000 36 20 12 -14.8 -15.1 28.90 18 27 238 89 018 115 84 38 -14-13-13 000 37 20 13 -14.6 -14.9 28.92 18 27 234 85 018 115 66 46 -13-12-13 000 38 20 14 -14.5 -14.8 28.95 19 32 239 90 010 115 51 43 -13-12-13 000 39 20 15 -14.2 -15.0 28.99 20 35 243 94 017 110 41 51 -13-12-13 000 40 20 16 -13.7 -16.8 29.00 20 32 237 88 024 85 41 47 -13-12-13 000 41 20 17 -13.5 -16.9 29.03 19 31 244 95 021 83 38 41 -12-12-13 000 42 20 18 -13.0 -16.8 29.06 18 29 245 96 016 79 40 48 -12-12-13 000 43 20 19 -12.4 -16.6 29.08 16 27 253 104 011 74 40 47 -11-12-13 000 44 20 20 -11.8 -16.3 29.11 15 24 252 103 009 72 39 48 -11-12-13 000 45 20 21 -11.6 -15.9 29.13 14 21 256 107 006 73 38 49 -11-11-13 000 46 20 22 -11.2 -15.8 29.14 12 18 259 110 004 71 45 47 -11-12-13 000 47 20 23 -10.8 -15.4 29.16 10 16 263 114 000 71 45 46 -11-12-13 000 48 21 00 -10.6 -15.1 29.17 9 13 274 125 000 72 47 43 -11-12-13 000 49 21 01 -10.6 -15.2 29.17 7 12 288 139 000 70 43 36 -11-12-13 000 50 21 02 -11.0 -14.6 29.17 7 12 283 134 000 79 41 31 -12-11-12 000 51 21 03 -11.5 -13.9 29.17 7 12 272 123 000 90 37 36 -11-11-12 000 52 21 04 -12.1 -14.5 29.18 7 12 263 114 -001 90 35 38 -11-11-12 000 53 21 05 -12.8 -15.8 29.18 7 12 258 109 -002 85 55 50 -11-11-12 000 54 21 06 -13.3 -16.7 29.18 7 13 253 104 000 80111 47 -11-12-12 000 55 21 07 -11.8 -15.5 29.18 8 14 249 100 -001 78102 52 -11-11-12 000 56 21 08 -11.7 -14.3 29.18 7 13 240 91 -003 88103 52 -12-12-12 000 57 21 09 -11.7 -13.5 29.19 8 12 238 89 -004 96102 56 -12-11-12 000 58 21 10 -10.9 -12.0 29.18 8 12 221 72 -002 102111 67 -12-13-12 000 59 21 11 -11.5 -12.6 29.18 6 11 229 80 -002 103 89 74 -12-12-12 000 60 21 12 -11.8 -12.2 29.18 6 8 228 79 -001 112 47 78 -12-12-12 000 61 21 13 -12.7 -13.2 29.17 6 9 225 76 -002 112 37 78 -12-11-13 000 62 21 14 -13.3 -13.4 29.17 6 7 211 62 -002 113 40 91 -12-11-13 000 63 21 15 -13.0 -13.2 29.17 5 6 212 63 -003 113 53 92 -12-12-13 000 64 21 16 -12.4 -12.5 29.17 5 6 217 68 -001 112 46 94 -12-12-13 000 65 21 17 -12.4 -12.6 29.16 5 6 216 67 -003 112 44103 -12-12-13 000 66 21 18 -11.7 -12.6 29.16 5 6 212 63 -002 104 53 96 -13-12-13 000 67 21 19 -12.1 -12.2 29.16 5 7 221 72 -001 112 69 94 -13-12-13 000 68 21 20 -11.0 -11.5 29.15 6 8 219 70 -002 107 89115 -12-12-13 000 69 21 21 -10.5 -10.9 29.15 7 9 212 63 -001 108114 95 -12-13-13 000 70 21 22 -10.6 -12.3 29.15 8 10 209 60 000 96114 95 -12-13-13 000 71 21 23 -10.8 -13.0 29.15 7 9 206 57 000 92 81 96 -12-13-14 000 72 22 00 -11.1 -12.9 29.14 8 10 200 51 -001 96 74 63 -12-13-14 000 73 22 01 -11.8 -12.9 29.14 8 9 198 49 -001 103 64 79 -13-13-14 000 74 22 02 -11.8 -12.7 29.13 7 9 199 50 000 105 68 78 -13-13-14 000 75 22 03 -11.7 -13.4 29.12 7 9 196 47 000 97110 85 -13-14-14 000 76 22 04 -11.9 -13.4 29.11 7 11 190 41 000 98100 86 -13-14-15 000 77 22 05 -12.9 -14.7 29.11 6 10 195 46 -001 96 69 83 -13-14-15 000 78 22 06 -13.8 -15.1 29.10 5 10 202 53 000 103 70 85 -13-14-15 000 79 22 07 -14.6 -15.2 29.10 5 10 207 58 000 114 80 86 -13-14-15 000 80 22 08 -15.5 -15.9 29.09 5 10 209 60 000 116 74 80 -14-14-15 000 81 22 09 -15.6 -15.8 29.09 4 9 201 52 -001 116 71 70 -14-14-16 000 82 22 10 -15.5 -15.7 29.09 6 11 207 58 -001 116 76 64 -14-15-16 000 83 22 11 -15.6 -15.8 29.08 6 14 210 61 -002 116 76 65 -14-15-15 000 84 22 12 -16.0 -16.2 29.07 7 15 210 61 -002 116 73 69 -14-14-15 000 85 22 13 -16.3 -16.5 29.07 7 14 209 60 -002 117 71 70 -14-14-15 000 86 22 14 -15.8 -16.1 29.06 7 13 204 55 -001 116 76 76 -14-14-15 000 87 22 15 -15.5 -15.7 29.05 7 13 205 56 -001 116 71 70 -14-14-15 000 88 22 16 -15.0 -15.2 29.04 8 13 205 56 000 115 75 76 -14-15-15 000 89 22 17 -14.5 -15.5 29.04 8 13 202 53 000 107 83 73 -14-15-16 000 90 22 18 -14.1 -15.1 29.04 8 12 196 47 000 107 80 75 -14-15-16 000 91 22 19 -13.7 -14.7 29.04 8 11 192 43 000 106 83 82 -14-15-16 000 92 22 20 -13.4 -14.8 29.04 8 11 188 39 000 102 94 83 -14-15-16 000 93 22 21 -13.7 -14.0 29.04 8 12 189 40 -001 112104 77 -14-15-16 000 94 22 22 -13.2 -14.0 29.04 8 12 185 36 -001 107102 59 -14-15-16 000 95 22 23 -13.0 -14.0 29.04 9 12 177 28 -002 105 88 59 -14-15-15 000 96 23 00 -13.1 -13.3 29.04 9 12 168 19 -001 112 65 54 -14-14-15 000 97 23 01 -13.1 -13.8 29.04 9 12 166 17 -002 108 74 59 -14-14-15 000 98 23 02 -13.1 -14.4 29.04 8 11 170 21 -002 102 68 64 -14-14-15 000 99 23 03 -13.1 -14.7 29.04 8 12 181 32 -001 99 63 64 -13-14-15 000 100 23 04 -13.4 -15.0 29.04 8 14 185 36 -001 99 64 57 -13-14-15 000 101 23 05 -13.8 -15.1 29.03 7 12 189 40 -001 104 58 56 -13-14-15 000 102 23 06 -14.5 -14.9 29.03 7 13 195 46 -001 114 56 56 -13-14-15 000 103 23 07 -15.7 -16.1 29.03 5 11 200 51 -003 116 55 54 -13-14-15 000 104 23 08 -16.9 -17.2 29.02 4 10 196 47 -002 117 56 54 -13-14-15 000 105 23 09 -17.5 -18.2 29.02 4 13 205 56 -002 118 57 58 -13-14-15 000 106 23 10 -17.7 -18.4 29.02 5 12 212 63 -002 117 53 61 -13-14-15 000 107 23 11 -17.6 -18.2 29.02 5 11 221 72 -001 117 50 58 -13-14-15 000 108 23 12 -17.6 -18.2 29.01 5 11 230 81 -002 117 53 55 -13-14-15 000 109 23 13 -17.3 -18.0 29.00 5 10 232 83 -002 117 63 55 -14-14-14 000 110 23 14 -17.0 -17.5 29.00 4 9 234 85 -002 117 57 53 -13-14-14 000 111 23 15 -16.8 -17.3 28.99 3 8 244 95 -001 117 55 49 -13-14-14 000 112 23 16 -15.8 -17.4 28.99 4 8 236 87 -001 103 57 48 -13-14-15 000 113 23 17 -15.1 -16.5 28.98 3 7 233 84 000 103 58 55 -13-14-15 000 114 23 18 -14.4 -16.2 28.98 2 4 236 87 001 99 59 57 -13-14-15 000 115 23 19 -13.7 -15.7 28.98 2 2 222 73 004 95 60 61 -13-14-15 000 116 23 20 -13.4 -15.4 28.99 2 2 197 48 004 96 61 60 -13-14-15 000 117 23 21 -13.8 -15.0 28.99 2 2 163 14 001 104 61 53 -13-14-15 000 118 23 22 -13.8 -14.9 29.00 2 3 104 315 000 105 62 50 -13-14-15 000 119 23 23 -12.9 -14.6 29.00 3 5 66 277 -002 98 85 42 -14-14-15 000 120 24 00 -12.3 -14.2 29.00 4 4 346 197 003 96111 41 -13-15-15 000 * 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.