USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092712 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 27 12 -26.8 -32.5 28.57 6 7 26 237 -010 062046040 M24M21M19 000 01 27 13 -30.7 -34.6 28.56 8 10 42 253 -019 068043039 M21M19M19 000 02 27 14 -30.6 -34.1 28.58 10 14 32 243 -016 072046041 M22M20M19 000 03 27 15 -30.8 -33.6 28.58 12 17 31 242 020 076044042 M21M19M18 000 04 27 16 -30.7 -33.3 28.61 13 18 28 239 041 078043044 M21M19M18 000 05 27 17 -30.5 -33.1 28.62 14 19 31 242 050 078042046 M21M19M18 000 06 27 18 -30.2 -32.8 28.64 13 20 30 241 096 078045046 M21M19M18 000 07 27 19 -29.9 -32.4 28.65 13 19 32 243 104 078050047 M22M19M18 000 08 27 20 -29.3 -32.0 28.67 12 19 33 244 108 078052049 M21M19M18 000 09 27 21 -29.1 -31.8 28.69 12 18 34 245 115 077054050 M22M19M18 000 10 27 22 -28.8 -31.6 28.70 11 16 32 243 099 077056050 M22M19M18 000 11 27 23 -28.5 -31.3 28.72 10 15 33 244 071 077057051 M21M19M18 000 12 28 00 -28.3 -31.2 28.73 10 13 38 249 026 077056052 M21M19M18 000 13 28 01 -28.2 -31.1 28.74 10 12 48 259 -012 076054051 M20M19M19 000 14 28 02 -27.9 -31.1 28.75 10 12 57 268 -026 074051047 M19M19M19 000 15 28 03 -28.2 -31.8 28.77 10 14 67 278 -014 071051045 M19M19M18 000 16 28 04 -28.3 -32.1 28.77 11 15 70 281 012 070049042 M19M18M18 000 17 28 05 -28.0 -32.2 28.77 11 15 70 281 031 068049041 M18M17M17 000 18 28 06 -27.9 -32.0 28.77 12 17 68 279 036 068048042 M18M17M17 000 19 28 07 -27.6 -31.5 28.77 11 16 66 277 029 069045044 M17M16M16 000 20 28 08 -26.9 -30.8 28.77 11 15 67 278 030 070042044 M16M16M16 000 21 28 09 -26.3 -30.4 28.78 11 14 72 283 033 068042045 M16M16M16 000 22 28 10 -25.2 -29.9 28.77 9 12 81 292 -001 065041043 M16M16M16 000 23 28 11 -25.0 -30.0 28.76 9 12 97 308 001 063041041 M16M15M15 000 24 28 12 -25.4 -30.4 28.75 10 14 109 320 -008 063043040 M15M15M15 000 25 28 13 -25.2 -30.1 28.75 10 15 116 327 024 063042038 M15M14M15 000 26 28 14 -24.8 -29.9 28.73 9 15 129 340 032 063039035 M14M14M14 000 27 28 15 -25.3 -29.9 28.73 10 16 140 351 024 065034034 M14M14M14 000 28 28 16 -26.0 -30.1 28.71 11 17 149 360 046 068033030 M15M13M13 000 29 28 17 -26.0 -30.2 28.71 11 16 154 5 023 068034020 M15M13M13 000 30 28 18 -25.8 -30.1 28.70 10 16 154 5 027 067033028 M15M13M13 000 31 28 19 -25.4 -29.7 28.69 10 14 160 11 020 067045058 M15M13M12 000 32 28 20 -24.7 -29.2 28.68 9 13 163 14 -004 067051066 M15M13M12 000 33 28 21 -24.0 -28.5 28.67 9 13 161 12 -011 066056069 M15M13M12 000 34 28 22 -23.5 -27.9 28.67 8 12 151 2 000 067059070 M15M13M12 000 35 28 23 -22.6 -27.0 28.66 7 10 149 0 -006 067056067 M14M13M12 000 36 29 00 -21.7 -26.2 28.66 6 9 140 351 -019 067056067 M14M13M12 000 37 29 01 -21.6 -26.0 28.65 6 8 125 336 -003 068055064 M14M12M11 000 38 29 02 -21.4 -25.8 28.65 5 7 109 320 -002 067055059 M14M12M11 000 39 29 03 -20.4 -25.2 28.66 4 5 99 310 003 065054056 M14M13M12 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.