USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-02-20/12 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 20 12 -21.9 -25.1 29.10 6 10 147 358 000 74 58 52 -13-12-11 000 1 20 13 -23.3 -24.3 29.09 7 11 144 355 -001 115 58 54 -13-12-11 000 2 20 14 -22.8 -23.9 29.07 6 12 145 356 -001 112 56 54 -13-11-11 000 3 20 15 -22.3 -23.5 29.08 7 12 148 359 000 110 55 55 -12-11-11 000 4 20 16 -22.0 -23.2 29.06 6 12 148 359 000 111 56 56 -13-11-11 000 5 20 17 -21.5 -22.8 29.05 5 11 148 359 001 109 55 56 -13-11-11 000 6 20 18 -20.6 -22.4 29.04 5 9 149 0 003 103 54 56 -12-11-11 000 7 20 19 -20.4 -22.5 29.02 5 10 161 12 001 100 55 55 -13-11-11 000 8 20 20 -19.9 -22.2 29.00 5 9 159 10 001 97 53 54 -12-11-11 000 9 20 21 -19.3 -22.0 29.00 5 9 176 27 000 92 52 54 -12-11-10 000 10 20 22 -19.1 -21.9 29.00 6 10 191 42 001 91 51 54 -12-11-11 000 11 20 23 -19.2 -22.0 28.96 6 11 186 37 001 92 52 55 -12-11-11 000 12 21 00 -19.5 -22.1 28.95 7 12 187 38 001 95 55 54 -13-11-11 000 13 21 01 -20.3 -22.5 28.94 6 11 177 28 000 100 54 53 -13-11-11 000 14 21 02 -21.1 -23.1 28.94 6 10 173 24 001 103 51 54 -13-11-11 000 15 21 03 -21.0 -23.2 28.93 6 11 162 13 001 100 49 54 -12-11-11 000 16 21 04 -20.7 -22.9 28.91 6 11 154 5 001 98 47 53 -12-11-11 000 17 21 05 -20.5 -22.6 28.90 6 11 156 8 003 98 45 53 -12-11-11 000 18 21 06 -20.8 -22.6 28.89 6 11 158 9 001 101 44 52 -12-11-11 000 19 21 07 -21.2 -22.8 28.87 6 11 159 10 001 104 45 50 -12-11-11 000 20 21 08 -21.7 -22.9 28.87 6 11 166 17 001 108 46 46 -12-11-11 000 21 21 09 -22.4 -23.3 28.87 7 12 163 14 001 111 48 38 -12-11-11 000 22 21 10 -22.8 -23.6 28.87 7 12 154 5 002 115 50 37 -12-10-10 000 23 21 11 -22.5 -23.7 28.86 6 12 149 0 002 108 50 43 -11-10-10 000 24 21 12 -21.9 -23.7 28.85 6 12 160 11 000 100 49 47 -11-10-10 000 25 21 13 -21.8 -23.9 28.84 6 12 166 17 001 97 50 46 -11-10-10 000 26 21 14 -21.4 -23.9 28.85 6 12 161 12 001 94 50 46 -11-10-10 000 27 21 15 -21.1 -23.8 28.85 6 12 164 15 002 92 51 47 -11-10-10 000 28 21 16 -21.0 -23.7 28.84 6 12 164 15 002 93 51 49 -12-10-10 000 29 21 17 -21.0 -23.6 28.83 6 12 171 22 001 94 52 49 -12-11-10 000 30 21 18 -20.8 -23.5 28.84 7 12 171 22 001 93 50 48 -12-10-10 000 31 21 19 -20.4 -23.3 28.84 6 11 176 27 000 91 51 48 -11-10-10 000 32 21 20 -19.7 -23.0 28.84 6 11 184 35 000 86 55 47 -11-10-10 000 33 21 21 -19.3 -22.8 28.83 6 10 192 43 001 83 51 47 -11-10-10 000 34 21 22 -19.0 -22.6 28.83 5 10 196 47 002 81 42 48 -11-10-10 000 35 21 23 -18.8 -22.5 28.83 5 10 210 61 002 81 39 48 -11-10-11 000 36 22 00 -19.3 -22.7 28.83 6 11 216 67 002 84 44 46 -12-11-11 000 37 22 01 -19.9 -24.1 28.83 7 11 217 68 000 75 48 43 -12-11-11 000 38 22 02 -20.6 -24.9 28.83 7 11 218 69 000 74 49 39 -12-10-10 000 39 22 03 -21.3 -25.5 28.83 7 11 218 69 -001 76 40 36 -11-10-10 000 40 22 04 -22.4 -25.9 28.83 7 11 221 72 000 85 34 35 -11-10-10 000 41 22 05 -23.4 -26.2 28.83 8 12 220 71 000 95 33 35 -11-10-10 000 42 22 06 -24.3 -26.1 28.84 7 12 219 70 000 107 32 35 -11-10-10 000 43 22 07 -24.5 -25.5 28.83 6 11 216 67 002 117 33 36 -11-10-10 000 44 22 08 -23.1 -23.8 28.83 4 9 214 65 003 116 35 36 -11-10-10 000 45 22 09 -22.3 -22.8 28.83 4 8 211 62 002 116 35 36 -11-10-10 000 46 22 10 -22.2 -22.2 28.84 4 8 212 63 002 122 34 36 -11-10-10 000 47 22 11 -23.0 -23.0 28.84 4 9 216 67 002 124 33 36 -12-10-10 000 48 22 12 -23.3 -23.4 28.84 3 8 235 86 004 124 33 37 -12-10-10 000 49 22 13 -23.8 -24.0 28.84 5 8 249 100 002 124 38 37 -13-10-10 000 50 22 14 -24.6 -25.1 28.85 6 11 246 97 001 125 43 36 -14-11-10 000 51 22 15 -24.6 -25.2 28.86 7 12 240 91 000 125 48 34 -14-11-10 000 52 22 16 -24.4 -25.0 28.86 6 12 231 82 000 125 52 34 -14-11-10 000 53 22 17 -23.6 -24.2 28.86 5 10 230 81 000 124 70 34 -13-11-10 000 54 22 18 -22.3 -22.8 28.85 5 9 226 77 002 122 79 33 -13-12-11 000 55 22 19 -21.4 -21.8 28.86 4 8 228 79 003 121 92 34 -14-12-11 000 56 22 20 -20.8 -21.4 28.86 5 8 223 74 003 121 97 34 -14-12-12 000 57 22 21 -20.6 -21.2 28.86 5 7 219 70 001 120 96 35 -14-12-12 000 58 22 22 -20.6 -21.4 28.86 5 7 227 78 003 121 94 43 -13-12-12 000 59 22 23 -20.4 -21.1 28.87 6 9 226 77 002 121 93 49 -14-13-12 000 60 23 00 -20.7 -21.4 28.87 6 9 226 77 001 121 94 58 -14-13-12 000 61 23 01 -21.3 -22.0 28.87 6 9 220 71 001 122 99 68 -14-13-12 000 62 23 02 -22.0 -22.7 28.87 6 10 212 63 001 123 97 81 -15-13-12 000 63 23 03 -23.1 -23.9 28.87 5 8 205 56 002 124 83 92 -15-13-13 000 64 23 04 -22.9 -23.4 28.87 4 9 195 46 000 123 85 85 -14-13-13 000 65 23 05 -23.0 -23.3 28.87 4 8 182 33 -002 124 93 83 -14-13-13 000 66 23 06 -23.6 -24.1 28.87 4 9 188 39 -002 124 77 59 -14-13-13 000 67 23 07 -23.1 -23.8 28.87 3 6 198 49 -002 124 76 21 -13-13-13 000 68 23 08 -23.6 -24.3 28.88 4 7 198 49 -001 125 74 30 -14-13-14 000 69 23 09 -24.9 -25.5 28.89 5 8 175 26 -002 127 73 17 -16-14-14 000 70 23 10 -24.8 -25.4 28.89 5 10 172 23 -001 127 83 17 -15-15-15 000 71 23 11 -25.8 -26.5 28.90 6 11 162 13 -001 128 85 21 -17-16-15 000 72 23 12 -26.6 -27.4 28.91 5 12 144 355 -002 128 58 21 -17-16-16 000 73 23 13 -24.9 -25.2 28.92 6 13 170 21 -003 125 27 25 -15-16-16 000 74 23 14 -22.9 -25.2 28.92 6 18 214 65 003 96 32 29 -15-16-16 000 75 23 15 -24.7 -26.8 28.92 9 15 228 79 004 102 30 29 -17-15-15 000 76 23 16 -26.5 -27.2 28.92 9 17 222 73 006 129 27 21 -18-15-15 000 77 23 17 -26.6 -27.3 28.93 8 15 238 89 005 129 53 28 -16-16-15 000 78 23 18 -25.2 -27.6 28.93 8 14 228 79 003 104 18 34 -17-15-15 000 79 23 19 -25.1 -27.8 28.94 9 15 229 80 003 100 27 37 -17-17-17 000 80 23 20 -24.8 -28.1 28.94 8 26 238 89 002 92 32 39 -18-16-17 000 81 23 21 -23.8 -28.4 28.94 9 30 233 84 001 77 35 42 -17-17-18 000 82 23 22 -24.7 -28.6 28.95 8 15 222 73 000 86 40 43 -19-17-18 000 83 23 23 -25.0 -28.7 28.96 7 14 211 62 000 88 62 39 -20-19-19 000 84 24 00 -24.3 -28.6 28.96 7 16 208 59 000 79 69 42 -20-20-20 000 85 24 01 -24.1 -28.5 28.96 9 18 215 66 -001 80 56 48 -19-20-20 000 86 24 02 -25.4 -29.0 28.97 10 23 209 60 -005 89 58 67 -20-20-21 000 87 24 03 -26.0 -29.1 28.97 9 20 219 70 -001 95 64 74 -21-20-20 000 88 24 04 -26.5 -28.2 28.97 10 19 224 75 -002 112 51 87 -21-20-19 000 89 24 05 -27.3 -28.3 28.98 11 24 216 67 -002 124 51 96 -23-20-19 000 90 24 06 -27.9 -28.5 28.98 12 27 207 58 -001 130 83 83 -23-21-20 000 91 24 07 -28.5 -29.6 28.99 10 23 206 57 000 123 71 69 -22-21-21 000 92 24 08 -28.4 -30.0 28.99 11 24 217 68 003 116 65 66 -22-21-21 000 93 24 09 -28.4 -30.0 29.00 12 26 222 73 005 117 77 64 -22-21-21 000 94 24 10 -28.1 -29.6 28.99 14 30 229 80 006 117 95 57 -21-20-21 000 95 24 11 -25.5 -28.3 28.99 17 29 227 78 009 99 95 55 -22-19-21 000 96 24 12 -25.0 -26.4 28.99 18 28 227 78 010 115104 52 -22-20-19 000 97 24 13 -25.1 -25.5 29.00 19 28 224 75 012 127 74 53 -24-19-19 000 98 24 14 -25.1 -25.6 29.00 19 30 220 71 010 127 51 50 -23-19-19 000 99 24 15 -26.1 -26.6 29.01 18 28 215 66 008 129 59 54 -23-19-19 000 100 24 16 -27.2 -27.7 29.01 15 23 218 69 009 130 66 56 -21-19-19 000 101 24 17 -27.8 -28.3 29.01 13 21 214 65 008 131 64 56 -21-20-19 000 102 24 18 -28.1 -28.6 29.02 12 19 211 62 005 131 65 56 -22-20-19 000 103 24 19 -28.4 -28.9 29.02 9 15 209 60 000 132 72 56 -22-21-19 000 104 24 20 -28.5 -29.6 29.03 8 13 208 59 -002 124 79 53 -23-21-20 000 105 24 21 -28.3 -29.5 29.04 6 12 207 58 -002 122 78 52 -23-20-20 000 106 24 22 -27.9 -29.2 29.04 6 11 207 58 -002 120 79 54 -22-20-20 000 107 24 23 -27.8 -29.0 29.05 6 12 202 53 -002 120 80 58 -23-20-20 000 108 25 00 -27.7 -29.0 29.05 6 12 193 44 000 121 79 50 -23-20-19 000 109 25 01 -28.0 -29.4 29.05 5 10 189 40 -001 121 84 51 -23-21-20 000 110 25 02 -28.6 -30.1 29.05 5 10 185 36 -001 122 87 55 -23-21-20 000 111 25 03 -28.8 -30.5 29.04 5 12 173 24 -001 118 70 57 -22-21-19 000 112 25 04 -29.1 -30.9 29.04 7 14 176 27 000 114 61 57 -23-21-20 000 113 25 05 -29.6 -31.3 29.04 7 12 181 32 000 116 52 63 -22-19-20 000 114 25 06 -30.0 -31.5 29.05 6 12 193 44 001 117 60 66 -21-20-20 000 115 25 07 -30.5 -31.7 29.05 6 12 200 51 001 122 63 67 -21-20-19 000 116 25 08 -29.1 -30.9 29.04 5 12 219 70 002 109 58 63 -20-19-20 000 117 25 09 -30.1 -31.7 29.04 8 15 213 64 002 113 61 60 -22-21-19 000 118 25 10 -30.7 -31.7 29.03 8 16 210 61 003 125 69 63 -23-22-19 000 119 25 11 -30.8 -31.8 29.03 7 16 213 64 004 125 65 71 -23-21-19 000 120 25 12 -31.0 -32.2 29.02 8 15 210 61 003 125 57 71 -23-20-18 000 * 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.