USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092212 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 22 12 -25.2 -29.5 28.71 12 11 86 297 -015 070066068 M24M23M23 000 01 22 13 -31.3 -34.1 28.67 11 14 88 299 015 076060063 M23M22M22 000 02 22 14 -31.2 -34.5 28.66 12 16 85 296 -004 073055063 M23M22M22 000 03 22 15 -30.9 -34.6 28.65 12 18 87 298 -002 070050058 M22M22M22 000 04 22 16 -30.7 -34.8 28.64 13 20 79 290 011 067045052 M22M21M22 000 05 22 17 -30.6 -34.9 28.64 13 19 78 289 028 066040045 M21M21M21 000 06 22 18 -30.3 -34.8 28.61 12 18 79 290 025 065038042 M21M21M21 000 07 22 19 -29.7 -34.3 28.60 11 16 80 291 014 064039042 M21M20M21 000 08 22 20 -29.2 -33.7 28.58 10 15 80 291 022 065042044 M21M20M21 000 09 22 21 -28.9 -33.2 28.55 10 14 83 294 001 066044046 M20M20M21 000 10 22 22 -28.4 -32.7 28.55 9 12 84 295 -002 066043045 M20M20M21 000 11 22 23 -28.0 -32.4 28.53 8 11 86 297 -007 066043040 M20M20M20 000 12 23 00 -28.0 -32.4 28.53 8 11 92 303 -007 066043037 M20M20M20 000 13 23 01 -28.5 -32.6 28.51 8 11 93 304 -009 068041035 M20M20M20 000 14 23 02 -28.3 -32.5 28.50 9 12 91 302 003 067038036 M20M20M20 000 15 23 03 -28.4 -32.3 28.48 9 12 90 301 003 069036039 M20M19M20 000 16 23 04 -28.2 -31.8 28.47 9 12 86 297 008 071036043 M19M19M20 000 17 23 05 -27.5 -31.2 28.46 8 11 80 291 -007 071035044 M19M19M20 000 18 23 06 -26.2 -30.4 28.45 7 9 76 287 -021 068035042 M19M19M20 000 19 23 07 -25.4 -30.1 28.43 6 7 71 282 -019 065036039 M19M19M20 000 20 23 08 -25.1 -30.0 28.43 5 6 66 277 -010 064038035 M19M20M20 000 21 23 09 -25.2 -30.0 28.42 5 6 57 268 008 064039032 M20M20M20 000 22 23 10 -25.2 -30.0 28.42 5 6 48 259 001 065037031 M20M20M20 000 23 23 11 -25.0 -29.9 28.42 4 5 44 255 -010 064035031 M20M19M20 000 24 23 12 -24.9 -29.9 28.41 4 4 43 254 -011 063034031 M19M19M20 000 25 23 13 -25.1 -30.0 28.42 4 5 36 247 -015 064034031 M19M19M20 000 26 23 14 -25.1 -30.1 28.42 4 5 34 245 -011 063034030 M19M20M20 000 27 23 15 -25.0 -30.2 28.42 4 5 27 237 -002 062035031 M20M20M20 000 28 23 16 -25.1 -30.3 28.43 5 6 20 231 002 062035032 M20M20M20 000 29 23 17 -25.0 -30.3 28.44 5 6 22 233 -003 061035031 M19M19M20 000 30 23 18 -24.9 -30.4 28.45 5 6 27 238 -007 061035027 M19M19M20 000 31 23 19 -24.9 -30.5 28.46 6 7 31 242 -005 060034025 M19M19M19 000 32 23 20 -24.9 -30.6 28.47 6 7 34 245 -005 059031026 M19M19M19 000 33 23 21 -25.0 -30.5 28.48 7 8 35 246 -012 060030030 M19M19M19 000 34 23 22 -25.1 -30.1 28.49 7 8 38 249 -018 063030035 M18M18M19 000 35 23 23 -24.8 -29.6 28.50 7 8 41 252 -020 065030040 M18M18M18 000 36 24 00 -24.3 -29.1 28.50 7 8 46 257 -020 064030044 M17M18M18 000 37 24 01 -23.6 -28.7 28.52 7 8 48 259 -020 063037050 M17M17M18 000 38 24 02 -23.0 -28.1 28.52 7 8 50 261 -021 063046052 M16M17M18 000 39 24 03 -23.1 -27.8 28.54 7 8 56 267 -023 065049054 M16M17M17 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.