USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-01-29/12 UTC MPAS cell scale: 2.3 km 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) (*) 0 29 12 -20.5 -25.7 28.69 3 3 45 256 000 58 44 31 -14-13-13 000 1 29 13 -19.4 -23.5 28.69 5 5 42 253 000 80 43 32 -13-13-13 000 2 29 14 -19.9 -23.7 28.71 6 6 46 257 001 81 41 32 -13-12-13 000 3 29 15 -19.6 -23.4 28.68 7 8 44 255 000 79 40 32 -12-12-13 000 4 29 16 -19.0 -22.9 28.68 7 8 43 254 000 78 39 33 -12-12-12 000 5 29 17 -18.4 -22.4 28.68 7 9 46 257 001 76 38 33 -12-12-12 000 6 29 18 -17.6 -21.8 28.67 7 9 52 263 000 74 36 33 -12-12-12 000 7 29 19 -16.8 -21.2 28.66 7 10 48 260 000 73 33 34 -11-11-12 000 8 29 20 -15.9 -20.6 28.67 7 9 50 261 000 70 31 34 -11-11-11 000 9 29 21 -15.1 -20.0 28.68 6 9 53 264 000 67 30 34 -10-10-11 000 10 29 22 -14.5 -19.6 28.67 7 10 54 265 000 66 30 34 -10-10-11 000 11 29 23 -14.1 -19.4 28.64 7 11 53 264 000 64 30 35 -10-10-11 000 12 30 00 -13.8 -19.4 28.65 7 11 53 264 000 61 31 36 -9-10-10 000 13 30 01 -13.6 -19.3 28.64 8 12 54 265 000 60 36 38 -9 -9-10 000 14 30 02 -13.6 -19.0 28.65 8 12 55 266 000 63 46 40 -9 -9-10 000 15 30 03 -13.6 -17.5 28.67 8 12 54 265 000 76 54 43 -9 -9-10 000 16 30 04 -13.8 -16.6 28.67 8 12 54 265 000 86 59 47 -8 -9 -9 000 17 30 05 -14.0 -16.9 28.66 9 12 57 268 000 85 60 51 -8 -8 -9 000 18 30 06 -14.3 -17.3 28.66 9 12 60 271 000 83 60 55 -8 -8 -9 000 19 30 07 -14.5 -17.1 28.66 9 12 63 274 000 87 68 59 -8 -8 -9 000 20 30 08 -14.6 -17.1 28.66 9 13 60 271 000 88 71 60 -8 -8 -9 000 21 30 09 -14.7 -17.6 28.65 9 13 58 269 000 84 70 61 -8 -9 -9 000 22 30 10 -14.7 -17.6 28.66 9 12 56 267 000 85 70 65 -8 -8 -9 000 23 30 11 -14.6 -16.7 28.66 8 10 57 268 000 93 73 68 -8 -8 -9 000 24 30 12 -14.3 -15.1 28.66 8 10 57 268 000 108 75 74 -8 -8 -9 000 25 30 13 -13.7 -14.2 28.67 8 11 52 263 000 113 76 78 -8 -8 -8 000 26 30 14 -13.1 -13.5 28.68 7 10 48 259 000 112 76 79 -8 -8 -8 000 27 30 15 -12.3 -12.9 28.68 7 10 47 258 000 109 77 81 -8 -8 -8 000 28 30 16 -11.4 -12.1 28.67 7 9 41 252 000 107 79 89 -8 -8 -8 000 29 30 17 -10.1 -11.0 28.68 6 9 30 241 000 103 79 97 -8 -8 -8 000 30 30 18 -8.9 -9.9 28.69 5 8 13 224 000 100 91101 -7 -8 -9 002 31 30 19 -8.0 -9.2 28.70 5 7 0 211 000 98 93103 -7 -7 -8 007 32 30 20 -7.6 -8.8 28.71 5 6 358 209 -001 98 94102 -7 -7 -8 006 33 30 21 -7.3 -8.3 28.73 6 7 353 204 -001 98 93104 -7 -8 -8 005 34 30 22 -7.0 -8.0 28.73 6 7 352 203 -001 99 97 98 -7 -8 -9 005 35 30 23 -6.7 -7.7 28.74 5 8 349 200 000 98 97 98 -7 -8 -8 006 36 31 00 -6.6 -7.6 28.75 6 8 353 204 000 98 96 98 -7 -8 -8 006 37 31 01 -6.6 -7.6 28.76 6 8 1 212 000 98 97 99 -8 -8 -8 006 38 31 02 -6.6 -7.5 28.77 6 8 6 217 000 99 97 99 -8 -8 -8 007 39 31 03 -6.9 -7.7 28.78 6 8 10 221 000 100 98100 -7 -8 -8 006 40 31 04 -7.4 -8.0 28.79 7 9 11 222 000 103101102 -8 -8 -9 005 41 31 05 -7.9 -8.3 28.80 6 10 17 228 000 106105100 -7 -8 -9 004 42 31 06 -8.3 -8.6 28.82 7 10 19 230 000 108108 98 -7 -9 -9 003 43 31 07 -7.9 -8.1 28.82 7 12 20 231 001 108109 94 -7 -9 -9 002 44 31 08 -7.8 -8.0 28.83 8 14 17 228 000 107109 95 -7 -8-10 001 45 31 09 -7.6 -7.7 28.85 9 16 17 228 000 107106 93 -7 -8 -9 004 46 31 10 -7.1 -7.3 28.86 13 19 13 224 000 107106 92 -7 -8 -9 008 47 31 11 -6.8 -7.0 28.86 16 21 4 215 000 106108106 -7 -8 -9 006 48 31 12 -7.1 -7.4 28.87 15 21 358 209 004 105109104 -8 -8 -9 009 49 31 13 -7.2 -7.5 28.89 16 22 353 204 001 106102105 -8 -8 -8 009 50 31 14 -7.5 -7.8 28.91 14 21 351 202 000 106 98105 -8 -8 -7 008 51 31 15 -7.7 -7.9 28.93 13 19 351 202 000 107 93 99 -8 -7 -7 006 52 31 16 -8.0 -8.1 28.95 12 18 349 200 -004 108100 94 -8 -8 -8 002 53 31 17 -7.7 -8.1 28.96 11 18 345 196 -001 105100 93 -8 -8 -8 001 54 31 18 -7.9 -8.5 28.97 11 18 350 201 000 103 97 96 -8 -8 -8 004 55 31 19 -7.6 -8.4 28.98 12 18 350 201 -001 101 93 99 -8 -7 -7 005 56 31 20 -7.3 -8.3 28.99 11 19 346 197 000 99 92100 -7 -7 -8 006 57 31 21 -7.1 -8.3 29.01 11 18 342 193 001 97 89 98 -7 -7 -8 004 58 31 22 -6.7 -7.9 29.02 10 15 343 194 002 96 89 99 -7 -7 -8 003 59 31 23 -6.5 -7.7 29.03 9 15 349 200 000 96 93102 -7 -7 -8 004 60 01 00 -6.5 -7.6 29.04 8 12 0 211 001 96 94 99 -7 -7 -8 005 61 01 01 -6.9 -7.9 29.04 7 11 14 225 001 98 95 95 -7 -8 -8 001 62 01 02 -7.3 -8.1 29.04 7 9 29 240 001 101 97 97 -7 -8 -8 000 63 01 03 -7.8 -8.2 29.04 7 10 45 256 000 105 99 91 -7 -8 -9 000 64 01 04 -8.3 -8.8 29.04 7 12 53 264 -001 105107 85 -7 -8 -9 000 65 01 05 -7.6 -8.9 29.03 8 14 57 268 000 96108 87 -7 -8 -9 000 66 01 06 -8.2 -9.4 29.03 9 16 55 266 -003 97 97 86 -7 -8 -8 000 67 01 07 -8.9 -9.1 29.03 11 15 37 248 -001 109 89 88 -7 -8 -8 000 68 01 08 -9.6 -9.8 29.03 11 16 35 246 000 109 85 89 -7 -7 -8 000 69 01 09 -9.7 -9.9 29.04 11 16 24 235 000 109 78 93 -7 -7 -7 000 70 01 10 -9.9 -10.2 29.04 9 14 22 233 -005 110 85 98 -7 -7 -8 000 71 01 11 -10.5 -10.8 29.03 7 12 29 240 -004 110 97 98 -7 -7 -8 000 72 01 12 -10.1 -10.3 29.03 7 13 28 239 -001 110 91 91 -7 -7 -9 000 73 01 13 -9.8 -10.3 29.03 7 13 29 240 -002 107 96 97 -7 -8 -8 002 74 01 14 -8.9 -10.0 29.02 7 12 31 242 -006 100 95 95 -7 -7 -8 007 75 01 15 -8.0 -9.2 29.02 10 14 25 236 -019 98 94101 -6 -7 -7 003 76 01 16 -8.1 -9.2 29.02 8 12 31 242 -010 98103107 -7 -7 -8 001 77 01 17 -7.6 -8.8 29.01 9 13 35 246 -007 97107 92 -7 -7 -8 003 78 01 18 -8.2 -9.4 29.01 10 16 28 239 -001 97106 91 -7 -7 -8 002 79 01 19 -7.5 -8.7 29.00 10 16 23 234 -001 97108 92 -6 -8 -8 000 80 01 20 -6.8 -7.5 28.99 10 16 20 231 000 101107 96 -7 -7 -8 003 81 01 21 -6.4 -6.9 28.99 11 18 17 228 008 103107 92 -7 -7 -8 006 82 01 22 -6.0 -6.4 28.99 12 19 5 216 000 103105100 -7 -7 -8 008 83 01 23 -5.9 -6.3 28.99 12 18 9 220 -001 102107 99 -7 -7 -8 007 84 02 00 -5.9 -6.3 28.97 13 19 8 219 -005 104107 99 -7 -7 -8 005 85 02 01 -5.4 -5.6 28.96 15 20 359 210 -005 105107 99 -6 -7 -8 005 86 02 02 -5.1 -5.4 28.96 15 20 359 210 -004 104105 98 -6 -7 -7 003 87 02 03 -5.0 -5.1 28.96 12 15 347 198 -004 105107104 -6 -7 -8 004 88 02 04 -5.1 -5.2 28.95 10 15 329 180 -003 105107102 -6 -7 -8 003 89 02 05 -5.2 -5.3 28.95 9 13 317 168 000 105107103 -6 -7 -8 000 90 02 06 -7.5 -7.6 28.95 7 9 317 168 -004 107103 97 -6 -7 -7 000 91 02 07 -8.2 -8.3 28.94 5 6 331 182 -002 108 92 91 -6 -6 -7 000 92 02 08 -8.6 -8.8 28.94 7 11 359 210 000 108 82 95 -6 -6 -7 000 93 02 09 -7.5 -7.7 28.95 7 11 357 208 -002 107 75 90 -5 -5 -6 000 94 02 10 -7.4 -7.6 28.95 9 11 353 204 000 107 71 90 -5 -5 -6 000 95 02 11 -6.7 -6.8 28.95 7 10 356 207 003 106 70 88 -5 -5 -6 000 96 02 12 -6.6 -6.8 28.95 4 5 13 224 000 106 69 98 -4 -5 -6 000 97 02 13 -6.3 -6.5 28.94 4 6 42 253 003 106 74106 -4 -5 -6 000 98 02 14 -5.8 -6.0 28.94 6 9 35 246 000 104 94108 -5 -5 -6 001 99 02 15 -5.4 -5.8 28.93 7 9 41 252 -001 102 99108 -5 -5 -6 003 100 02 16 -5.0 -5.3 28.93 10 13 37 248 000 102100107 -5 -5 -5 003 101 02 17 -4.5 -4.9 28.93 12 16 35 246 000 101103101 -5 -5 -5 011 102 02 18 -4.2 -4.6 28.92 11 15 40 251 -004 101105108 -4 -5 -5 020 103 02 19 -3.7 -4.1 28.92 11 15 41 252 -004 100104101 -4 -4 -5 019 104 02 20 -3.2 -3.5 28.92 11 14 32 243 -003 101104101 -4 -4 -5 026 105 02 21 -2.8 -3.0 28.92 10 13 28 239 -005 101104106 -3 -4 -4 018 106 02 22 -2.3 -2.3 28.93 10 13 16 227 -002 102104107 -3 -4 -4 014 107 02 23 -2.1 -2.1 28.93 11 15 355 206 000 102104105 -3 -4 -4 011 108 03 00 -2.2 -2.2 28.92 12 16 354 205 000 102104101 -3 -4 -5 008 109 03 01 -2.1 -2.1 28.92 12 17 355 206 -001 102104 94 -3 -4 -5 013 110 03 02 -2.1 -2.1 28.92 13 17 348 199 000 102104 98 -3 -4 -5 005 111 03 03 -2.1 -2.1 28.92 13 18 348 199 000 102104 90 -3 -4 -4 009 112 03 04 -2.2 -2.3 28.92 12 17 350 201 000 102104 90 -3 -4 -4 000 113 03 05 -2.2 -2.3 28.92 11 15 0 211 000 102104 88 -3 -4 -4 000 114 03 06 -2.4 -2.4 28.93 10 15 354 205 000 102104 89 -3 -4 -3 000 115 03 07 -2.6 -2.6 28.93 8 13 352 203 000 102104 86 -3 -4 -4 000 116 03 08 -2.8 -2.8 28.93 8 11 356 207 000 102104 81 -3 -4 -5 000 117 03 09 -3.0 -3.0 28.93 8 9 355 206 000 103101 85 -4 -4 -3 000 118 03 10 -3.3 -3.4 28.93 7 9 7 218 -001 103 96 92 -4 -3 -3 003 119 03 11 -3.4 -3.4 28.93 5 9 39 250 000 103 98 99 -3 -3 -4 004 120 03 12 -3.4 -3.5 28.92 5 7 55 267 -001 103101104 -3 -4 -4 013 * 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.