USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092800 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 28 00 -25.7 -29.3 28.71 10 11 31 242 -015 072056048 M23M21M19 000 01 28 01 -28.8 -31.6 28.71 11 14 45 256 058 077051046 M22M20M19 000 02 28 02 -28.8 -31.9 28.73 11 15 56 267 073 075048042 M21M20M19 000 03 28 03 -29.0 -32.3 28.73 12 17 59 270 082 073046044 M21M20M19 000 04 28 04 -29.2 -32.9 28.74 12 19 63 274 096 070045044 M21M19M18 000 05 28 05 -29.2 -33.4 28.74 13 20 65 276 118 067047042 M20M18M18 000 06 28 06 -29.0 -33.6 28.76 13 21 61 272 121 064050040 M19M18M17 000 07 28 07 -28.3 -33.0 28.75 13 19 59 270 130 064050037 M19M18M17 000 08 28 08 -27.8 -32.4 28.75 12 17 59 270 081 064046039 M18M17M16 000 09 28 09 -26.7 -31.9 28.75 9 11 70 281 023 062043041 M17M16M15 000 10 28 10 -26.3 -31.9 28.75 8 11 106 317 -081 059043043 M17M16M16 000 11 28 11 -24.5 -31.1 28.74 8 11 116 327 -069 055040044 M16M16M16 000 12 28 12 -26.3 -31.9 28.73 10 15 126 337 024 060036040 M16M15M15 000 13 28 13 -26.6 -31.6 28.73 12 18 125 336 010 063036037 M15M14M15 000 14 28 14 -26.8 -31.4 28.72 12 18 129 340 049 065042034 M15M14M14 000 15 28 15 -25.9 -30.3 28.71 11 18 134 345 042 066034036 M15M14M14 000 16 28 16 -24.8 -29.7 28.70 10 17 142 353 037 064033035 M15M14M14 000 17 28 17 -24.7 -29.7 28.69 10 15 155 5 021 063033057 M15M14M14 000 18 28 18 -25.3 -29.9 28.70 10 14 168 19 -008 066042079 M15M14M14 000 19 28 19 -25.4 -29.9 28.69 9 14 170 21 -023 066070083 M15M13M13 000 20 28 20 -24.9 -29.8 28.69 9 13 168 19 -004 064078077 M15M13M13 000 21 28 21 -24.2 -29.4 28.69 8 12 157 8 -014 063078074 M15M13M13 000 22 28 22 -23.1 -27.8 28.69 7 10 148 359 010 066072071 M15M13M13 000 23 28 23 -22.0 -25.3 28.69 6 8 127 338 004 075068069 M14M13M13 000 24 29 00 -20.9 -23.5 28.69 5 7 106 317 002 080066063 M14M13M13 000 25 29 01 -20.1 -23.2 28.69 5 5 103 314 -002 077061056 M13M12M12 000 26 29 02 -19.3 -22.9 28.69 4 5 117 328 002 073056054 M13M12M12 000 27 29 03 -20.4 -23.8 28.70 5 7 110 321 005 074056050 M14M13M13 000 28 29 04 -20.0 -23.9 28.70 4 6 125 336 026 071050043 M13M12M11 000 29 29 05 -20.7 -24.5 28.70 6 8 122 333 007 072048047 M13M12M11 000 30 29 06 -22.7 -26.0 28.71 7 10 114 325 015 074039055 M13M11M10 000 31 29 07 -23.4 -27.7 28.71 9 13 95 306 008 068047060 M13M11M10 000 32 29 08 -23.1 -27.7 28.70 12 18 75 285 045 066049050 M12M10M10 000 33 29 09 -21.9 -25.7 28.71 13 18 73 284 039 072043045 M12M10M10 000 34 29 10 -21.7 -24.9 28.70 13 20 79 290 049 075040043 M12M11M10 000 35 29 11 -23.1 -26.0 28.71 14 22 71 282 082 077041042 M13M11M10 000 36 29 12 -23.9 -26.8 28.71 14 23 68 279 145 077039039 M14M11M09 000 37 29 13 -24.8 -27.7 28.72 16 26 64 275 163 076039043 M13M10M09 000 38 29 14 -25.8 -28.8 28.73 17 27 61 272 099 076038035 M14M10M09 000 39 29 15 -26.4 -29.6 28.75 20 32 62 273 033 074034028 M13M09M09 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.