USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025073012 AMPS thwaites domain 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) (*) 00 30 12 -29.0 -35.3 28.20 11 12 109 320 -007 060038033 M25M21M20 000 01 30 13 -32.9 -37.2 28.20 14 22 118 329 -030 065036031 M25M22M21 000 02 30 14 -34.3 -38.3 28.16 17 27 101 312 008 067031035 M25M21M20 000 03 30 15 -34.8 -38.2 28.13 18 29 91 302 039 071032037 M25M21M20 000 04 30 16 -35.4 -39.0 28.10 17 27 88 299 047 069034037 M26M22M20 000 05 30 17 -36.4 -40.4 28.07 15 24 88 299 095 066033035 M26M22M21 000 06 30 18 -36.8 -41.2 28.05 14 23 95 305 107 064030033 M27M23M21 000 07 30 19 -37.6 -42.0 28.02 13 23 98 309 111 063023028 M27M24M22 000 08 30 20 -38.4 -42.7 28.00 13 23 99 310 070 064028025 M29M25M23 000 09 30 21 -38.3 -42.7 27.95 14 23 97 308 049 063026021 M28M25M23 000 10 30 22 -38.4 -42.8 27.92 13 20 92 303 -021 063027020 M27M24M23 000 11 30 23 -38.7 -43.0 27.90 11 17 76 287 -050 064035020 M29M26M24 000 12 31 00 -38.4 -42.6 27.89 13 18 50 261 005 064037021 M28M26M24 000 13 31 01 -39.0 -42.6 27.89 14 21 45 256 -003 069045022 M28M25M24 000 14 31 02 -40.1 -42.1 27.89 16 23 50 261 018 081063026 M29M25M24 000 15 31 03 -40.2 -42.1 27.88 15 23 51 262 075 082070033 M28M25M23 000 16 31 04 -40.5 -42.3 27.89 15 22 49 260 052 083065043 M27M24M23 000 17 31 05 -40.1 -41.6 27.89 15 22 43 254 034 086054053 M28M24M23 000 18 31 06 -41.2 -43.2 27.90 15 23 42 253 024 081051041 M29M25M23 000 19 31 07 -41.8 -44.3 27.90 16 23 41 252 -013 076047053 M29M25M23 000 20 31 08 -42.2 -44.8 27.90 15 22 38 249 -053 075048056 M30M25M23 000 21 31 09 -42.5 -44.4 27.91 13 20 35 246 -049 082052059 M30M26M24 000 22 31 10 -42.3 -44.2 27.92 13 20 28 239 -036 082054061 M30M26M26 000 23 31 11 -42.5 -44.2 27.92 14 20 34 245 -026 083056051 M29M27M27 000 24 31 12 -42.6 -44.3 27.93 13 20 37 248 -038 083063047 M30M28M28 000 25 31 13 -42.3 -44.0 27.94 13 20 32 243 -014 083067045 M30M29M28 000 26 31 14 -42.1 -43.8 27.96 13 20 30 241 -021 084066043 M32M28M27 000 27 31 15 -42.2 -43.9 27.97 14 21 32 243 001 083064044 M32M27M26 000 28 31 16 -41.8 -43.5 27.98 16 23 27 238 012 083060045 M31M26M25 000 29 31 17 -41.6 -43.3 28.00 16 24 25 236 -037 083055048 M31M25M24 000 30 31 18 -41.5 -43.1 28.02 16 24 23 234 -050 084040052 M31M25M24 000 31 31 19 -41.4 -43.2 28.05 16 24 21 232 -061 083034051 M31M25M24 000 32 31 20 -41.4 -43.2 28.07 17 25 16 227 -061 083034050 M31M25M24 000 33 31 21 -41.4 -43.3 28.10 18 27 14 225 -081 082033054 M32M26M25 000 34 31 22 -41.6 -43.3 28.12 18 27 8 219 -070 083033052 M33M27M24 000 35 31 23 -41.7 -43.4 28.14 19 29 3 214 -056 084032045 M33M27M24 000 36 01 00 -41.7 -43.3 28.17 18 28 1 212 -042 085032039 M34M28M25 000 37 01 01 -41.5 -42.9 28.20 17 26 3 214 -036 086034038 M34M29M26 000 38 01 02 -41.3 -42.8 28.23 15 24 10 221 -035 086038039 M34M29M27 000 39 01 03 -41.1 -42.7 28.26 14 22 18 229 -027 084042036 M34M31M28 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.