USAP Siple Dome (SDM) (lat, lon) = (-81.664, -149.0175) Forecast initialized at 2025092612 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 26 12 -31.7 -35.1 28.50 16 17 31 242 -025 072060044 M28M24M22 000 01 26 13 -35.5 -38.5 28.51 19 29 35 246 058 074064044 M27M23M22 000 02 26 14 -35.5 -37.7 28.52 19 30 38 249 069 080064045 M27M23M22 000 03 26 15 -35.5 -37.2 28.52 19 29 38 249 047 084060048 M27M23M22 000 04 26 16 -35.4 -37.0 28.54 18 28 37 248 090 086057051 M26M23M22 000 05 26 17 -35.4 -36.9 28.55 18 28 37 248 088 086062054 M26M24M22 000 06 26 18 -35.0 -36.5 28.57 17 26 40 251 114 086067055 M26M23M22 000 07 26 19 -34.2 -35.8 28.55 16 26 41 252 099 086069053 M26M23M22 000 08 26 20 -33.5 -35.2 28.55 17 26 42 253 107 085075054 M26M23M22 000 09 26 21 -33.0 -34.7 28.56 17 26 44 255 127 085086058 M26M24M23 000 10 26 22 -32.9 -34.6 28.57 16 26 45 256 135 085092070 M26M24M23 000 11 26 23 -32.8 -34.6 28.57 16 26 49 260 142 084100068 M26M24M23 000 12 27 00 -31.6 -33.5 28.58 17 26 47 258 114 083100056 M27M25M24 000 13 27 01 -30.9 -33.0 28.58 17 27 39 250 119 082100051 M27M25M23 000 14 27 02 -31.0 -33.1 28.59 17 27 34 245 140 081091048 M27M24M22 000 15 27 03 -30.9 -33.0 28.60 16 26 28 239 153 082076045 M26M23M21 000 16 27 04 -31.0 -32.8 28.60 15 26 31 242 156 084069042 M27M23M21 000 17 27 05 -30.8 -32.1 28.60 15 24 38 249 162 088069042 M27M22M20 000 18 27 06 -30.2 -30.8 28.61 16 24 36 247 148 095065043 M26M22M20 000 19 27 07 -30.0 -30.5 28.61 16 24 31 242 137 095059044 M24M21M20 000 20 27 08 -29.9 -30.5 28.62 15 23 24 235 114 095059044 M24M21M19 000 21 27 09 -30.1 -30.6 28.63 13 20 31 242 122 095088045 M25M22M20 000 22 27 10 -29.6 -30.1 28.64 12 18 33 244 104 095095047 M24M22M20 000 23 27 11 -29.1 -29.7 28.64 12 18 28 239 088 095097048 M24M22M19 000 24 27 12 -28.8 -29.3 28.64 13 20 26 237 075 095099051 M24M23M19 000 25 27 13 -28.4 -29.0 28.65 14 21 25 236 046 095096050 M24M22M19 000 26 27 14 -28.3 -28.8 28.66 14 20 23 234 022 095097050 M25M22M19 000 27 27 15 -28.3 -28.9 28.67 12 19 27 238 004 095100054 M25M23M19 000 28 27 16 -28.2 -28.8 28.69 11 17 35 246 -020 095100058 M25M24M20 000 29 27 17 -28.2 -28.7 28.70 10 17 40 251 -028 095100060 M25M24M21 000 30 27 18 -28.2 -28.7 28.71 12 18 41 252 -018 095094064 M25M23M20 000 31 27 19 -28.6 -29.1 28.71 14 20 38 249 -011 095062064 M25M22M20 000 32 27 20 -28.5 -29.0 28.72 15 21 37 248 002 095063064 M25M21M19 000 33 27 21 -28.5 -29.1 28.73 16 22 35 246 021 095063057 M24M20M19 000 34 27 22 -28.6 -29.1 28.74 16 23 35 246 053 095049059 M23M20M18 000 35 27 23 -28.6 -29.1 28.74 16 23 33 244 047 095054048 M22M19M18 000 36 28 00 -28.6 -29.2 28.75 16 23 33 244 056 095044042 M22M19M18 000 37 28 01 -28.8 -29.3 28.76 16 22 32 243 070 095039043 M22M19M18 000 38 28 02 -29.1 -29.6 28.77 14 20 34 245 088 095037048 M22M19M18 000 39 28 03 -29.5 -30.1 28.78 13 18 35 246 080 095040038 M21M19M19 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.