USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092112 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 21 12 -25.3 -28.2 28.82 11 13 344 195 -007 075077079 M24M23M22 000 01 21 13 -28.4 -31.0 28.85 11 17 358 209 -010 079074076 M23M22M22 002 02 21 14 -29.3 -31.3 28.85 12 18 5 216 -018 083076081 M24M22M22 002 03 21 15 -30.0 -31.5 28.85 13 19 7 218 -036 087077086 M24M23M22 002 04 21 16 -30.2 -31.3 28.86 12 18 10 221 -033 090077087 M24M22M22 000 05 21 17 -30.1 -31.0 28.87 12 18 11 222 -039 092076087 M24M22M22 000 06 21 18 -30.1 -30.9 28.88 12 17 13 224 -046 093076086 M24M23M22 000 07 21 19 -30.1 -30.8 28.87 11 16 17 228 -052 093076087 M24M23M23 000 08 21 20 -29.9 -30.7 28.87 10 15 22 233 -032 093075088 M24M23M23 000 09 21 21 -29.6 -30.6 28.87 10 13 26 237 -009 091074086 M24M23M23 000 10 21 22 -29.5 -30.6 28.87 9 11 35 246 001 090075086 M24M23M23 000 11 21 23 -29.3 -30.5 28.85 8 10 42 253 -015 090078082 M24M24M24 000 12 22 00 -29.3 -30.4 28.84 8 10 48 259 -005 090079080 M24M24M24 000 13 22 01 -29.5 -30.6 28.84 9 11 56 267 -001 090080080 M24M24M24 000 14 22 02 -30.0 -31.0 28.83 10 13 63 274 008 091080077 M24M24M24 000 15 22 03 -30.2 -31.1 28.82 11 15 68 279 -002 091078073 M24M23M23 000 16 22 04 -30.2 -31.1 28.81 11 15 71 282 -015 092077073 M23M23M23 000 17 22 05 -30.1 -31.1 28.80 11 16 73 284 -028 091075073 M23M23M23 000 18 22 06 -29.9 -31.0 28.78 11 15 76 287 -031 090074073 M22M22M23 000 19 22 07 -29.8 -31.0 28.77 11 15 85 296 -018 089074072 M22M22M23 000 20 22 08 -29.8 -31.0 28.76 11 16 91 302 -003 090075072 M22M22M23 000 21 22 09 -29.8 -30.8 28.74 11 16 89 300 -007 091075070 M22M22M22 000 22 22 10 -29.8 -31.2 28.72 11 17 88 299 000 087074069 M22M22M22 000 23 22 11 -29.8 -31.9 28.70 12 18 89 300 003 082069067 M22M22M22 000 24 22 12 -29.8 -32.4 28.68 12 18 89 300 003 078066064 M22M22M22 000 25 22 13 -29.7 -32.9 28.66 12 17 88 299 005 074064062 M22M21M22 000 26 22 14 -29.7 -33.3 28.65 12 17 87 298 -000 071058062 M22M21M22 000 27 22 15 -29.7 -33.6 28.63 11 17 87 298 -008 069047062 M22M21M22 000 28 22 16 -29.7 -33.6 28.61 11 16 85 296 -011 069037062 M21M21M21 000 29 22 17 -29.4 -33.5 28.60 11 15 85 296 -011 068034062 M21M21M21 000 30 22 18 -29.0 -33.3 28.58 10 14 87 298 -010 066034059 M21M21M21 000 31 22 19 -28.7 -33.2 28.56 10 14 91 302 -010 065034056 M21M21M21 000 32 22 20 -28.3 -32.7 28.54 10 13 94 305 -004 066034054 M21M21M21 000 33 22 21 -27.8 -32.1 28.52 9 12 91 302 -014 066035052 M20M21M21 000 34 22 22 -27.3 -31.6 28.50 8 10 91 302 -011 067037051 M20M21M21 000 35 22 23 -26.6 -31.0 28.49 7 9 89 299 -017 066041049 M20M20M21 000 36 23 00 -25.7 -30.2 28.47 6 8 93 304 -033 066047050 M20M20M21 000 37 23 01 -25.1 -29.2 28.45 5 6 96 307 -044 068052049 M20M20M21 000 38 23 02 -24.8 -28.5 28.43 4 6 106 317 -032 071053048 M20M20M21 000 39 23 03 -25.1 -28.3 28.41 5 6 115 326 -017 074052048 M20M20M21 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.