USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092100 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 21 00 -18.4 -20.3 28.75 7 8 326 177 -001 083085082 M19M20M20 000 01 21 01 -19.3 -21.3 28.75 8 11 317 168 006 084083080 M20M20M19 007 02 21 02 -20.6 -22.6 28.77 8 11 315 166 -004 084083080 M20M20M20 002 03 21 03 -22.1 -24.1 28.79 7 10 323 174 015 084082084 M21M20M20 002 04 21 04 -23.3 -25.5 28.79 8 11 343 194 -002 082083086 M21M21M21 004 05 21 05 -24.0 -26.4 28.80 9 13 355 206 -012 080081085 M21M21M21 006 06 21 06 -24.9 -27.3 28.81 10 15 356 207 -018 080080083 M22M21M21 004 07 21 07 -26.1 -28.5 28.81 11 17 355 205 -004 080079079 M22M21M21 001 08 21 08 -26.8 -29.2 28.84 11 16 357 208 -014 081077078 M22M21M20 000 09 21 09 -27.3 -29.5 28.83 11 16 358 209 -023 082077081 M22M21M21 000 10 21 10 -27.8 -29.9 28.84 11 17 2 213 -015 082079085 M23M21M21 000 11 21 11 -27.8 -30.1 28.86 11 17 3 214 -015 081079087 M23M22M21 001 12 21 12 -27.5 -29.9 28.85 10 15 3 214 -023 080079086 M23M21M22 002 13 21 13 -27.1 -29.7 28.88 10 14 6 217 -022 079079086 M23M22M22 003 14 21 14 -27.4 -29.9 28.86 11 16 12 222 003 079080085 M23M22M22 004 15 21 15 -28.1 -30.6 28.87 11 16 13 224 015 079078083 M23M22M22 002 16 21 16 -28.5 -30.9 28.88 10 15 15 226 032 080078083 M23M22M22 001 17 21 17 -28.7 -31.0 28.89 10 14 14 225 023 080077083 M23M22M22 000 18 21 18 -28.5 -30.8 28.89 9 13 14 225 014 081077083 M23M22M23 000 19 21 19 -28.2 -30.5 28.90 9 13 13 224 015 081078083 M23M23M23 000 20 21 20 -27.8 -30.2 28.88 9 13 14 225 -000 080078081 M23M23M23 001 21 21 21 -27.5 -29.9 28.88 8 12 18 229 -019 080078079 M23M23M23 001 22 21 22 -27.4 -29.8 28.89 7 9 26 237 -012 080078081 M23M23M23 001 23 21 23 -27.4 -29.8 28.87 6 7 45 256 -017 080080080 M23M23M24 001 24 22 00 -27.6 -30.0 28.86 7 8 50 261 001 080080078 M23M23M24 001 25 22 01 -28.0 -30.2 28.86 8 10 62 273 -006 081079077 M23M23M23 000 26 22 02 -28.5 -30.6 28.84 9 12 68 279 -009 082078078 M23M23M23 000 27 22 03 -28.6 -30.6 28.84 10 14 68 279 -009 083075075 M23M22M23 000 28 22 04 -28.8 -30.8 28.83 11 16 69 280 -015 084075073 M22M22M23 000 29 22 05 -28.9 -30.8 28.82 11 16 70 281 -031 084075072 M22M22M22 000 30 22 06 -28.9 -30.7 28.80 11 17 74 285 -015 084074073 M22M22M22 000 31 22 07 -28.8 -30.5 28.78 11 17 76 287 -014 085072075 M22M22M22 000 32 22 08 -28.7 -30.3 28.77 11 16 78 289 -009 086067069 M22M22M22 000 33 22 09 -28.6 -30.1 28.77 11 16 80 291 -016 087064043 M22M22M22 000 34 22 10 -28.6 -30.1 28.74 11 16 83 294 -003 087061037 M22M22M22 000 35 22 11 -28.6 -30.1 28.72 11 16 83 294 -004 087057041 M21M21M22 000 36 22 12 -28.6 -30.3 28.70 11 16 83 294 011 085048042 M21M21M21 000 37 22 13 -28.6 -30.2 28.69 11 16 78 289 -014 086041043 M21M21M21 000 38 22 14 -28.4 -30.4 28.68 11 16 77 288 001 084037043 M21M21M21 000 39 22 15 -28.3 -30.8 28.67 11 17 76 287 -003 079037044 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.