USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-02-01/12 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 01 12 -8.8 -11.6 28.97 7 11 20 231 -001 68 75 89 -6 -6 -7 000 1 01 13 -10.2 -11.7 28.96 8 11 15 226 000 97 81 94 -6 -6 -7 000 2 01 14 -10.7 -12.0 28.97 8 11 27 238 -002 100 88 95 -6 -6 -7 000 3 01 15 -10.3 -11.6 28.96 8 13 32 243 -003 99 95 97 -6 -7 -7 000 4 01 16 -9.6 -10.9 28.95 9 15 28 239 -003 99107 96 -6 -7 -8 000 5 01 17 -8.0 -9.6 28.95 10 14 22 233 -001 94107 95 -6 -7 -8 000 6 01 18 -7.8 -9.3 28.93 11 15 17 228 -002 95107 93 -7 -7 -8 000 7 01 19 -7.5 -8.7 28.94 12 17 16 227 -001 97107 94 -7 -7 -8 000 8 01 20 -6.7 -7.7 28.93 11 17 15 226 000 99107 94 -6 -7 -8 001 9 01 21 -6.3 -6.9 28.92 11 18 7 218 000 101108 94 -6 -7 -8 003 10 01 22 -6.5 -7.0 28.94 12 18 5 216 -002 102102 98 -7 -7 -8 005 11 01 23 -6.5 -7.1 28.93 12 18 2 213 003 102104100 -7 -7 -7 006 12 02 00 -6.4 -6.9 28.90 12 15 356 207 001 103101102 -7 -7 -7 004 13 02 01 -6.3 -6.6 28.90 11 14 358 209 002 104102100 -7 -7 -7 002 14 02 02 -6.3 -6.6 28.90 11 15 354 205 002 104104 99 -7 -7 -7 002 15 02 03 -6.4 -6.5 28.90 11 14 357 208 000 106101 97 -7 -7 -6 002 16 02 04 -6.0 -6.2 28.90 10 14 355 206 000 105103 97 -7 -7 -7 001 17 02 05 -5.9 -6.0 28.90 9 13 354 205 000 106103 96 -6 -6 -7 002 18 02 06 -5.8 -5.9 28.89 9 13 352 203 000 105103 94 -6 -7 -7 002 19 02 07 -5.8 -6.0 28.88 8 12 358 209 000 105107 95 -6 -7 -7 003 20 02 08 -5.9 -6.0 28.88 8 12 4 215 -005 106107 97 -6 -7 -7 003 21 02 09 -5.7 -5.8 28.88 8 11 16 227 -004 105107 97 -6 -7 -8 002 22 02 10 -5.6 -5.7 28.87 8 11 16 227 -005 105107101 -6 -7 -7 005 23 02 11 -5.6 -5.7 28.87 8 10 22 233 -004 105105101 -6 -7 -7 005 24 02 12 -5.6 -5.8 28.86 8 10 32 243 -006 104102104 -6 -6 -7 007 25 02 13 -5.6 -5.9 28.85 8 10 40 251 -006 104105104 -6 -6 -7 010 26 02 14 -5.6 -5.7 28.85 9 12 46 257 003 105106105 -6 -6 -7 005 27 02 15 -5.1 -5.2 28.86 9 14 35 246 000 105106107 -5 -6 -7 004 28 02 16 -4.4 -4.5 28.84 11 15 28 239 -003 104105108 -5 -5 -6 006 29 02 17 -3.8 -3.9 28.83 11 15 15 226 -003 104105103 -4 -5 -6 007 30 02 18 -3.4 -3.5 28.83 11 14 13 224 -003 103102 98 -4 -5 -5 010 31 02 19 -3.1 -3.3 28.83 10 13 14 225 -003 102101 93 -4 -5 -5 008 32 02 20 -2.8 -3.2 28.83 10 13 18 229 -003 99105 94 -4 -5 -6 008 33 02 21 -2.8 -3.0 28.83 12 15 11 222 -002 102104101 -4 -5 -6 014 34 02 22 -2.8 -3.5 28.82 10 17 1 212 -003 97105100 -4 -5 -6 011 35 02 23 -2.9 -3.5 28.82 13 18 358 209 -006 97105101 -4 -5 -6 027 36 03 00 -3.1 -3.6 28.82 14 18 353 204 -005 98104100 -4 -5 -6 022 37 03 01 -3.3 -3.4 28.82 13 17 348 199 -005 103105 96 -4 -5 -6 016 38 03 02 -3.3 -3.4 28.82 13 16 347 198 -004 103105 92 -4 -5 -6 004 39 03 03 -3.4 -3.4 28.81 12 15 349 200 -003 103105 87 -4 -5 -6 001 40 03 04 -3.5 -3.5 28.81 11 14 353 204 000 103105 94 -4 -5 -6 003 41 03 05 -3.7 -3.8 28.80 11 13 357 208 000 103105 89 -4 -5 -6 002 42 03 06 -3.9 -4.0 28.80 9 12 358 209 000 104106 81 -5 -6 -4 000 43 03 07 -4.2 -4.3 28.79 8 10 8 219 -001 104 88 81 -5 -4 -4 000 44 03 08 -4.6 -4.9 28.79 8 9 16 227 -001 103 77 83 -5 -3 -4 000 45 03 09 -5.2 -5.3 28.78 10 11 30 241 000 105 77 83 -6 -3 -4 000 46 03 10 -4.9 -5.0 28.76 8 9 35 246 000 105 71 81 -6 -2 -4 000 47 03 11 -5.1 -5.2 28.74 7 8 47 258 000 105 71 79 -4 -2 -4 000 48 03 12 -5.0 -5.1 28.73 6 7 64 275 001 105 75 80 -5 -3 -4 000 49 03 13 -5.5 -5.6 28.71 6 7 91 302 001 105 75 78 -5 -3 -4 000 50 03 14 -5.5 -5.6 28.69 10 11 108 319 000 105 69 76 -6 -2 -3 000 51 03 15 -5.0 -5.2 28.68 12 15 111 322 000 104 64 75 -6 -2 -3 000 52 03 16 -4.8 -4.9 28.66 14 18 119 330 003 104 61 75 -6 -2 -3 000 53 03 17 -4.5 -4.7 28.64 16 20 125 336 000 103 71 73 -5 -3 -2 000 54 03 18 -3.8 -4.3 28.62 17 21 131 342 001 99 99 68 -5 -5 -2 000 55 03 19 -3.6 -4.2 28.60 16 21 137 348 000 98106 63 -5 -6 -2 000 56 03 20 -4.0 -4.0 28.58 17 21 142 353 000 104 98 57 -5 -5 -2 000 57 03 21 -4.0 -4.0 28.56 17 22 150 1 -004 104 89 52 -5 -4 -3 000 58 03 22 -3.8 -3.9 28.55 17 23 157 8 -006 104 91 48 -5 -4 -4 000 59 03 23 -3.7 -3.7 28.53 17 24 162 13 001 103 86 56 -5 -4 -3 000 60 04 00 -3.8 -3.8 28.52 16 24 163 14 -011 104 82 59 -5 -4 -4 000 61 04 01 -3.9 -3.9 28.51 16 24 167 18 005 104 78 61 -5 -3 -4 000 62 04 02 -3.9 -4.0 28.50 14 23 172 23 -005 104 81 57 -5 -4 -4 000 63 04 03 -4.1 -4.2 28.49 13 21 180 31 -005 104 81 60 -4 -4 -3 000 64 04 04 -4.4 -4.5 28.48 12 19 191 42 -012 104 78 57 -3 -4 -3 000 65 04 05 -4.6 -4.6 28.47 10 17 203 54 -005 104 77 61 -3 -3 -3 000 66 04 06 -4.7 -4.8 28.47 7 13 231 82 -005 104 88 86 -5 -4 -4 004 67 04 07 -4.6 -4.9 28.48 5 8 235 86 -004 102 94103 -5 -4 -5 040 68 04 08 -4.6 -5.2 28.49 2 4 285 136 000 99100107 -5 -5 -5 055 69 04 09 -4.5 -5.2 28.50 4 4 345 196 000 99104107 -5 -5 -6 029 70 04 10 -5.0 -5.2 28.50 7 8 2 213 001 104103100 -5 -5 -6 011 71 04 11 -5.3 -5.5 28.51 10 12 18 229 003 105106 93 -6 -6 -6 003 72 04 12 -5.6 -5.7 28.52 10 12 27 238 000 105103 94 -6 -6 -7 001 73 04 13 -5.7 -5.8 28.54 9 11 32 243 000 105106 92 -6 -6 -7 000 74 04 14 -5.4 -5.5 28.55 8 10 36 247 001 105107 95 -6 -7 -8 000 75 04 15 -5.2 -5.2 28.56 6 9 20 231 000 105107102 -6 -7 -8 000 76 04 16 -4.8 -4.9 28.58 5 7 352 204 000 104107107 -6 -7 -7 001 77 04 17 -4.6 -4.6 28.60 7 8 347 198 001 104107106 -5 -7 -7 001 78 04 18 -4.7 -4.8 28.62 10 11 336 187 000 104107106 -6 -7 -6 004 79 04 19 -4.9 -5.5 28.65 11 14 344 195 -002 99100102 -6 -6 -7 004 80 04 20 -4.8 -5.1 28.67 12 16 0 211 -002 102106 98 -6 -6 -7 005 81 04 21 -4.2 -5.0 28.70 12 16 356 207 -005 97 97105 -5 -6 -7 009 82 04 22 -3.8 -4.6 28.72 15 20 347 198 000 97104110 -5 -6 -7 024 83 04 23 -3.9 -4.8 28.74 16 20 346 197 -002 96 99111 -5 -6 -7 037 84 05 00 -4.0 -4.7 28.76 14 19 350 201 -001 98106111 -5 -6 -7 013 85 05 01 -4.1 -4.4 28.78 16 21 349 200 -004 101104111 -5 -6 -7 014 86 05 02 -4.5 -5.1 28.79 16 19 353 205 -002 99107111 -6 -7 -7 024 87 05 03 -5.0 -5.5 28.80 15 19 4 215 -003 101107 96 -6 -7 -8 016 88 05 04 -5.4 -5.8 28.81 16 20 7 218 -004 103108 94 -6 -7 -8 008 89 05 05 -5.8 -6.0 28.82 16 20 14 225 -003 105 98 83 -7 -7 -8 004 90 05 06 -6.4 -6.8 28.83 14 19 18 229 -007 103108 83 -7 -8 -9 001 91 05 07 -7.3 -7.4 28.83 12 19 27 238 -006 107102 85 -7 -8 -9 000 92 05 08 -8.5 -8.7 28.84 9 15 34 245 -005 108104 92 -6 -7 -8 000 93 05 09 -7.9 -8.1 28.84 10 15 38 249 -002 108 99 96 -6 -7 -9 000 94 05 10 -6.9 -7.1 28.85 9 13 50 261 000 107106 98 -7 -8 -8 000 95 05 11 -8.0 -8.1 28.85 10 13 56 267 -002 108102 85 -6 -7 -8 000 96 05 12 -8.0 -8.2 28.85 9 13 58 269 -004 108 90 85 -6 -7 -8 000 97 05 13 -9.2 -9.3 28.84 8 13 61 272 -004 109 83 81 -6 -7 -8 000 98 05 14 -10.4 -10.7 28.83 7 13 65 276 -009 110 85 82 -6 -7 -8 000 99 05 15 -9.2 -9.6 28.83 8 14 75 286 -002 107 82 90 -6 -6 -7 000 100 05 16 -9.0 -9.3 28.82 10 18 72 283 000 109 84 92 -6 -6 -7 000 101 05 17 -8.2 -9.1 28.82 10 18 76 287 -001 101 76 98 -5 -6 -7 000 102 05 18 -7.4 -9.1 28.81 9 17 85 296 -001 92 77 98 -5 -6 -7 000 103 05 19 -6.4 -8.8 28.80 9 18 99 310 000 85 79100 -5 -6 -7 000 104 05 20 -6.1 -8.3 28.79 8 16 88 299 000 86 71 89 -5 -5 -7 000 105 05 21 -6.3 -7.8 28.79 9 13 61 272 -001 93 89 88 -5 -6 -7 000 106 05 22 -6.6 -7.8 28.79 8 10 45 256 000 96 84 97 -5 -6 -7 000 107 05 23 -6.9 -8.0 28.78 7 9 36 247 000 97 80 93 -5 -6 -7 000 108 06 00 -7.2 -8.3 28.78 6 7 40 251 -001 98 85 85 -5 -6 -7 000 109 06 01 -7.0 -8.3 28.77 6 8 46 257 000 96 81 90 -5 -6 -7 000 110 06 02 -7.2 -8.4 28.76 5 7 42 253 000 96 75 87 -5 -6 -7 000 111 06 03 -7.8 -8.9 28.75 6 8 40 251 -002 98 75 86 -5 -6 -7 000 112 06 04 -8.5 -9.4 28.75 6 8 31 242 -001 101 81 89 -6 -6 -7 000 113 06 05 -8.7 -9.2 28.75 7 9 30 241 000 105 81 91 -6 -6 -8 000 114 06 06 -8.7 -9.0 28.74 7 10 49 260 000 108 83 99 -6 -7 -8 000 115 06 07 -10.2 -10.4 28.74 8 13 43 254 000 110 87 95 -6 -7 -8 000 116 06 08 -11.2 -11.5 28.74 8 12 38 249 000 111 86 97 -6 -7 -8 000 117 06 09 -11.3 -11.6 28.74 7 13 32 243 000 111 89 84 -6 -7 -8 000 118 06 10 -11.2 -11.5 28.74 8 11 26 237 000 111 90 83 -7 -7 -8 000 119 06 11 -11.6 -11.9 28.75 7 11 24 235 000 111 88 88 -6 -7 -8 000 120 06 12 -12.2 -12.5 28.75 7 11 22 233 000 112 86 92 -6 -7 -8 000 * 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.