USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092200 AMPS 2p67km 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 00 -26.9 -29.6 28.81 8 8 25 236 -010 074080079 M26M26M25 000 01 22 01 -31.3 -33.6 28.80 9 12 38 249 002 080075077 M25M25M25 000 02 22 02 -31.6 -33.9 28.81 10 13 45 256 020 080075078 M25M25M25 000 03 22 03 -31.7 -33.8 28.79 11 16 52 263 -002 082075079 M25M25M24 000 04 22 04 -32.1 -34.0 28.78 11 16 59 270 -035 083073080 M25M24M24 000 05 22 05 -32.2 -34.1 28.77 11 16 65 276 -038 083071077 M24M24M24 000 06 22 06 -32.1 -33.9 28.76 11 16 67 278 -026 084068075 M24M24M24 000 07 22 07 -32.0 -33.7 28.75 10 15 72 283 -009 085066075 M24M23M24 000 08 22 08 -31.8 -33.4 28.76 11 15 83 294 -029 086068075 M23M23M24 000 09 22 09 -31.8 -33.3 28.72 11 16 85 296 -015 087069074 M24M23M24 000 10 22 10 -31.6 -33.1 28.72 12 17 86 297 -007 086068072 M24M23M23 000 11 22 11 -31.4 -33.1 28.69 12 18 87 298 004 085068070 M24M23M23 000 12 22 12 -31.3 -33.3 28.66 12 18 89 299 008 083068067 M23M23M23 000 13 22 13 -31.3 -33.3 28.64 12 18 91 302 009 083066064 M23M23M23 000 14 22 14 -31.3 -33.1 28.63 12 18 95 306 010 083065061 M23M23M23 000 15 22 15 -31.2 -33.2 28.64 12 19 100 311 019 082064059 M23M23M23 000 16 22 16 -31.0 -33.2 28.62 12 18 99 310 023 081062057 M23M22M23 000 17 22 17 -30.6 -32.8 28.59 12 17 94 305 023 081060054 M22M22M22 000 18 22 18 -30.1 -32.7 28.58 11 16 96 307 018 078058052 M22M22M22 000 19 22 19 -29.7 -32.4 28.54 10 15 98 309 026 077055050 M22M22M22 000 20 22 20 -29.2 -32.3 28.53 9 13 101 312 017 075052046 M22M22M22 000 21 22 21 -28.8 -32.4 28.52 8 11 105 316 004 071049044 M21M21M22 000 22 22 22 -28.6 -32.6 28.50 7 10 110 321 -019 069046042 M21M21M22 000 23 22 23 -28.6 -32.8 28.48 7 10 112 323 -031 067044040 M21M21M22 000 24 23 00 -28.1 -32.8 28.47 7 9 107 318 -019 064041038 M21M21M21 000 25 23 01 -27.3 -32.5 28.46 7 9 100 311 -005 061039036 M21M21M21 000 26 23 02 -26.8 -32.3 28.45 6 8 88 299 -003 060038038 M20M20M21 000 27 23 03 -26.5 -32.0 28.42 6 7 74 285 -011 060038045 M20M20M21 000 28 23 04 -26.1 -31.7 28.42 5 6 56 267 -034 059039049 M20M20M21 000 29 23 05 -25.7 -31.5 28.41 4 5 46 257 010 058040048 M20M20M21 000 30 23 06 -25.2 -31.4 28.41 2 3 44 255 -008 056039046 M20M20M21 000 31 23 07 -24.8 -31.4 28.38 1 2 63 274 -014 054040047 M20M20M21 000 32 23 08 -24.9 -31.5 28.38 2 3 79 290 -012 054040048 M20M20M21 000 33 23 09 -26.0 -31.8 28.38 4 5 43 254 004 058040050 M21M20M21 000 34 23 10 -27.2 -32.1 28.38 6 7 27 238 -010 063039050 M21M20M21 000 35 23 11 -27.1 -31.8 28.38 6 8 20 231 -016 064038049 M20M20M21 000 36 23 12 -26.4 -31.4 28.37 6 7 9 220 -009 063038047 M20M20M21 000 37 23 13 -25.9 -31.0 28.38 5 6 9 220 -009 062037041 M20M20M21 000 38 23 14 -26.0 -31.0 28.39 6 7 20 231 -007 063038035 M20M20M21 000 39 23 15 -26.1 -31.3 28.39 6 7 27 238 -010 062040041 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 1h) 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.