USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092900 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 29 00 -18.0 -24.2 28.74 2 2 175 26 001 058078072 M16M15M13 000 01 29 01 -20.1 -24.4 28.73 4 5 138 349 -017 069079064 M16M13M12 000 02 29 02 -19.8 -23.6 28.73 4 5 104 315 022 072077059 M14M13M12 000 03 29 03 -19.1 -22.6 28.74 4 4 77 288 007 074075053 M14M13M12 000 04 29 04 -19.0 -22.4 28.75 4 4 71 282 029 075071043 M14M13M11 000 05 29 05 -21.6 -24.4 28.74 8 9 70 281 -003 078067044 M14M12M11 000 06 29 06 -21.5 -24.3 28.74 7 9 65 276 003 078059045 M12M11M11 000 07 29 07 -21.9 -24.5 28.74 9 12 64 275 003 080055049 M12M11M11 000 08 29 08 -19.5 -22.4 28.74 7 8 69 280 -039 078047051 M11M10M10 000 09 29 09 -20.9 -23.7 28.76 9 13 69 280 -058 079047050 M11M10M10 000 10 29 10 -20.8 -24.0 28.75 11 14 67 278 -030 076043045 M11M10M10 000 11 29 11 -20.5 -24.0 28.76 12 16 72 283 011 074043043 M10M10M10 000 12 29 12 -20.0 -23.4 28.75 11 16 81 292 024 074045046 M10M09M09 000 13 29 13 -21.3 -23.8 28.78 17 26 74 285 031 080048050 M11M10M10 000 14 29 14 -21.9 -25.5 28.79 18 29 70 281 004 073038035 M11M10M10 000 15 29 15 -22.2 -26.2 28.81 21 32 67 278 048 070032032 M12M10M11 000 16 29 16 -22.4 -26.6 28.81 21 32 68 279 028 069023022 M13M11M11 000 17 29 17 -22.2 -26.4 28.82 22 34 72 283 010 069023016 M12M11M12 000 18 29 18 -22.2 -26.3 28.83 21 32 72 283 -054 070038016 M14M12M12 000 19 29 19 -22.7 -26.7 28.84 19 30 75 286 -064 070045017 M13M12M12 000 20 29 20 -22.4 -26.5 28.85 19 29 77 288 -063 069033022 M12M12M12 000 21 29 21 -21.9 -26.2 28.85 19 30 78 289 -056 068028032 M12M11M11 000 22 29 22 -21.1 -25.6 28.83 21 34 77 288 -013 067029031 M12M10M09 000 23 29 23 -20.2 -24.3 28.83 23 36 79 290 -055 070031030 M12M09M09 000 24 30 00 -19.3 -23.1 28.82 23 36 77 288 -028 072034034 M13M10M09 000 25 30 01 -19.0 -22.6 28.81 23 35 79 290 018 073036039 M13M10M10 000 26 30 02 -19.1 -22.6 28.81 21 33 82 293 051 074037043 M13M11M10 000 27 30 03 -19.1 -22.5 28.80 21 34 82 293 002 074037040 M13M11M10 000 28 30 04 -19.3 -22.7 28.80 22 34 81 292 -022 074035035 M13M10M10 000 29 30 05 -19.4 -23.0 28.80 21 33 82 293 -026 074033030 M12M10M10 000 30 30 06 -19.5 -23.2 28.79 21 34 82 293 -047 073031030 M11M09M09 000 31 30 07 -19.5 -23.4 28.78 20 33 82 293 -070 071031033 M10M09M09 000 32 30 08 -19.1 -23.3 28.76 21 35 71 282 -133 070028033 M09M08M08 000 33 30 09 -19.7 -23.6 28.75 20 33 76 287 -006 071030029 M10M08M08 000 34 30 10 -19.9 -23.8 28.74 19 31 79 290 -003 071032033 M10M08M08 000 35 30 11 -19.6 -23.7 28.73 19 30 83 294 009 070032038 M09M08M08 000 36 30 12 -19.4 -23.7 28.72 18 30 82 293 025 069034033 M09M08M08 000 37 30 13 -19.6 -23.8 28.71 18 30 83 294 -022 069033035 M09M08M08 000 38 30 14 -19.6 -23.6 28.70 18 29 85 296 -026 071039042 M09M08M08 000 39 30 15 -19.8 -23.5 28.69 18 29 85 296 -032 072041042 M09M08M08 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.