USAP Grounding Zone (ACT) site lat/lon = (-84.3380,-163.5425) cell lat/lon = (-84.3284,-163.5930) Forecast initialized at 2025-12-23/12 UTC MPAS cell scale: 2.4 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 23 12 -16.2 -18.4 29.33 3 4 188 24 000 89 66 38 -13-13-12 000 1 23 13 -16.4 -17.0 29.33 4 5 195 31 -001 115 67 41 -13-12-12 000 2 23 14 -16.5 -17.2 29.36 3 5 186 23 000 116 66 42 -13-12-12 000 3 23 15 -16.5 -16.9 29.35 4 7 223 60 -003 117 51 36 -12-11-10 000 4 23 16 -16.6 -16.8 29.35 2 6 233 69 002 117 46 36 -11-10-10 000 5 23 17 -16.4 -16.7 29.35 4 8 240 77 005 117 45 52 -11-10 -9 000 6 23 18 -14.4 -16.5 29.35 6 13 208 45 -001 96 45 54 -11 -9 -9 000 7 23 19 -13.3 -15.5 29.34 9 13 215 51 004 93 39 48 -9 -7 -8 000 8 23 20 -12.0 -14.5 29.34 8 14 176 13 007 89 45 58 -10 -9 -9 000 9 23 21 -10.9 -14.0 29.32 6 10 150 346 -003 84 36 44 -9 -8 -9 000 10 23 22 -10.4 -13.6 29.33 7 12 142 338 -002 82 28 51 -9 -9-10 000 11 23 23 -10.1 -13.4 29.31 6 12 159 355 001 80 35 65 -9 -9-10 000 12 24 00 -9.8 -13.3 29.32 8 16 151 348 001 78 35 36 -10-10-10 000 13 24 01 -9.8 -13.1 29.32 8 20 128 325 -005 80 40 40 -10 -9-10 000 14 24 02 -9.9 -13.4 29.33 7 17 119 315 -002 79 40 37 -9 -9 -9 000 15 24 03 -10.0 -13.1 29.35 6 13 180 17 001 82 35 32 -9 -8 -9 000 16 24 04 -10.2 -12.8 29.34 5 10 172 8 007 86 27 55 -10 -8 -8 000 17 24 05 -10.4 -12.7 29.33 5 7 205 42 006 88 55 66 -8 -6 -7 000 18 24 06 -10.3 -12.6 29.31 5 26 197 34 004 86 64 50 -6 -6 -7 000 19 24 07 -7.7 -10.4 29.31 13 30 137 334 001 83 59 53 -6 -6 -6 000 20 24 08 -6.9 -10.3 29.31 18 33 140 337 003 78 60 47 -6 -6 -6 000 21 24 09 -6.9 -10.7 29.32 20 36 136 333 003 74 57 47 -6 -7 -6 000 22 24 10 -6.6 -11.3 29.33 21 39 130 327 004 68 50 47 -5 -6 -6 000 23 24 11 -6.7 -11.5 29.33 20 38 133 330 -002 67 51 48 -6 -7 -6 000 24 24 12 -6.8 -11.7 29.33 20 40 131 328 -001 66 46 47 -5 -6 -6 000 25 24 13 -6.8 -11.9 29.33 20 38 133 329 003 65 44 42 -5 -6 -6 000 26 24 14 -6.9 -11.7 29.35 19 38 136 332 004 67 46 40 -6 -7 -7 000 27 24 15 -6.9 -11.7 29.35 19 38 132 329 006 67 48 39 -6 -7 -7 000 28 24 16 -6.9 -11.5 29.35 18 36 132 328 001 68 50 36 -6 -7 -7 000 29 24 17 -6.8 -11.4 29.35 18 35 131 327 000 69 50 36 -6 -7 -7 000 30 24 18 -6.7 -11.0 29.36 17 33 133 330 002 71 55 37 -6 -7 -7 000 31 24 19 -6.7 -10.8 29.36 17 32 129 325 000 72 52 35 -6 -7 -7 000 32 24 20 -6.4 -10.4 29.37 16 30 130 326 000 72 53 34 -6 -7 -7 000 33 24 21 -6.3 -10.1 29.37 16 29 132 329 000 74 56 34 -6 -7 -7 000 34 24 22 -6.1 -9.8 29.37 16 28 131 328 000 74 54 35 -6 -7 -7 000 35 24 23 -5.9 -9.5 29.36 15 26 131 328 000 75 54 35 -6 -7 -7 000 36 25 00 -5.8 -9.2 29.36 14 25 130 327 000 76 51 34 -6 -7 -6 000 37 25 01 -5.7 -9.0 29.36 13 24 131 327 -001 77 51 34 -6 -7 -6 000 38 25 02 -5.7 -8.8 29.36 12 22 131 327 000 79 51 34 -6 -6 -6 000 39 25 03 -5.8 -8.7 29.36 11 21 132 328 000 80 53 33 -6 -6 -6 000 40 25 04 -6.0 -8.7 29.36 10 20 132 328 -001 82 52 32 -6 -6 -6 000 41 25 05 -6.4 -8.9 29.36 9 19 132 329 000 83 50 32 -5 -6 -6 000 42 25 06 -6.9 -9.3 29.36 8 17 138 334 000 85 48 30 -5 -6 -6 000 43 25 07 -7.6 -9.9 29.36 7 15 141 338 004 86 46 30 -5 -6 -6 000 44 25 08 -8.4 -10.4 29.36 7 14 157 354 005 89 47 30 -5 -6 -6 000 45 25 09 -9.1 -10.8 29.35 7 13 168 5 001 93 50 30 -5 -6 -6 000 46 25 10 -9.5 -11.3 29.35 7 14 158 354 003 92 51 30 -5 -6 -6 000 47 25 11 -10.1 -11.9 29.35 7 13 157 354 -001 93 49 29 -5 -5 -6 000 48 25 12 -10.9 -12.6 29.36 6 10 173 10 -001 95 38 31 -5 -5 -6 000 49 25 13 -10.9 -12.8 29.36 6 15 168 4 -001 92 39 35 -6 -5 -5 000 50 25 14 -10.5 -12.9 29.36 6 14 169 5 -003 87 46 34 -5 -5 -5 000 51 25 15 -10.1 -12.7 29.37 7 15 158 354 -002 85 40 34 -5 -5 -5 000 52 25 16 -9.6 -12.0 29.37 7 16 167 3 000 87 38 33 -6 -5 -5 000 53 25 17 -9.3 -11.8 29.36 7 16 157 354 001 86 40 31 -6 -5 -6 000 54 25 18 -8.7 -11.5 29.35 8 18 156 352 -001 84 45 32 -8 -6 -6 000 55 25 19 -8.2 -11.0 29.35 8 18 147 343 000 83 42 34 -7 -6 -6 000 56 25 20 -7.6 -10.4 29.36 8 18 148 345 000 83 42 33 -7 -6 -5 000 57 25 21 -6.9 -9.8 29.36 9 17 149 345 -001 81 47 32 -7 -7 -5 000 58 25 22 -6.7 -9.7 29.37 10 19 139 335 -002 80 43 36 -7 -6 -5 000 59 25 23 -6.3 -9.1 29.37 8 15 143 340 -002 81 39 38 -7 -5 -5 000 60 26 00 -6.1 -8.9 29.36 9 17 146 342 000 81 44 38 -6 -6 -6 000 61 26 01 -5.8 -8.4 29.36 8 18 152 348 -001 83 47 39 -6 -6 -6 000 62 26 02 -5.7 -8.2 29.36 8 17 152 348 000 83 41 38 -6 -5 -6 000 63 26 03 -5.6 -8.1 29.35 7 16 157 354 000 83 41 36 -5 -5 -5 000 64 26 04 -5.8 -8.3 29.35 7 17 158 354 000 83 49 34 -5 -6 -6 000 65 26 05 -6.3 -8.4 29.35 6 17 162 358 001 86 47 37 -5 -6 -6 000 66 26 06 -6.8 -8.8 29.34 7 15 167 4 002 88 46 41 -6 -6 -6 000 67 26 07 -7.3 -9.2 29.35 7 16 164 0 001 90 59 42 -5 -6 -6 000 68 26 08 -7.9 -9.7 29.35 7 16 162 358 000 92 56 33 -5 -6 -6 000 69 26 09 -8.5 -10.0 29.35 7 14 158 355 000 94 47 37 -5 -5 -5 000 70 26 10 -8.9 -10.2 29.35 8 14 168 4 000 98 51 40 -6 -5 -6 000 71 26 11 -9.4 -10.8 29.35 6 14 160 357 001 97 50 38 -5 -5 -6 000 72 26 12 -9.5 -11.2 29.35 7 16 161 358 001 94 51 36 -5 -5 -6 000 73 26 13 -9.4 -11.7 29.35 8 20 158 355 002 88 50 36 -5 -5 -6 000 74 26 14 -9.4 -11.8 29.35 7 20 154 350 002 87 48 36 -5 -5 -6 000 75 26 15 -9.3 -11.7 29.34 7 19 147 344 002 86 43 35 -6 -5 -5 000 76 26 16 -9.0 -11.4 29.34 7 20 153 350 004 86 45 34 -6 -5 -5 000 77 26 17 -8.3 -11.1 29.35 8 22 155 352 000 83 49 33 -6 -6 -6 000 78 26 18 -7.8 -10.5 29.34 8 21 153 349 001 83 43 34 -7 -5 -5 000 79 26 19 -7.0 -10.1 29.34 10 22 145 342 001 79 52 36 -6 -6 -5 000 80 26 20 -6.4 -9.7 29.34 11 25 128 325 001 78 41 36 -6 -5 -5 000 81 26 21 -5.9 -8.8 29.35 9 20 152 349 000 81 57 35 -6 -6 -5 000 82 26 22 -5.5 -8.4 29.35 9 23 144 341 002 80 53 33 -5 -6 -5 000 83 26 23 -4.9 -8.3 29.35 11 24 137 334 000 75 51 32 -5 -5 -5 000 84 27 00 -4.8 -8.0 29.35 11 26 127 324 002 77 40 33 -5 -4 -5 000 85 27 01 -4.5 -7.4 29.36 10 22 142 339 000 80 61 38 -5 -6 -5 000 86 27 02 -4.6 -7.4 29.35 10 20 127 323 -001 80 41 40 -4 -4 -4 000 87 27 03 -4.7 -7.2 29.36 10 21 137 333 000 83 54 46 -5 -5 -5 000 88 27 04 -4.8 -7.0 29.36 9 19 138 334 000 85 54 47 -5 -5 -5 000 89 27 05 -5.1 -7.2 29.35 8 17 133 329 -001 86 49 44 -4 -4 -5 000 90 27 06 -5.5 -7.5 29.36 8 19 153 349 001 87 60 47 -4 -5 -6 000 91 27 07 -5.9 -7.9 29.36 8 19 149 346 000 87 61 52 -4 -5 -6 000 92 27 08 -6.1 -8.3 29.37 9 20 139 336 001 85 60 52 -4 -4 -6 000 93 27 09 -6.7 -8.7 29.38 8 20 152 348 000 87 62 53 -4 -5 -6 000 94 27 10 -6.9 -9.1 29.39 9 20 142 338 001 86 64 53 -4 -5 -6 000 95 27 11 -7.4 -9.3 29.40 8 19 146 342 003 90 69 54 -5 -5 -6 000 96 27 12 -7.7 -9.3 29.40 8 18 134 330 002 92 74 54 -6 -5 -6 000 97 27 13 -7.8 -9.3 29.40 9 17 126 322 000 94 78 49 -6 -6 -6 000 98 27 14 -8.0 -9.5 29.41 9 17 126 323 -001 95 79 44 -6 -6 -6 000 99 27 15 -8.0 -9.7 29.42 9 17 126 322 002 92 79 51 -6 -6 -7 000 100 27 16 -7.8 -9.7 29.42 8 18 122 318 000 91 73 53 -7 -6 -7 000 101 27 17 -7.5 -9.4 29.43 8 18 121 317 000 90 72 44 -7 -6 -6 000 102 27 18 -7.0 -9.1 29.44 10 19 123 320 000 88 71 43 -7 -6 -6 000 103 27 19 -6.6 -8.8 29.44 11 19 123 319 000 87 70 46 -7 -7 -6 000 104 27 20 -6.3 -8.6 29.45 11 19 122 318 001 86 69 45 -7 -7 -6 000 105 27 21 -6.0 -8.5 29.46 11 18 121 318 001 85 69 45 -7 -7 -6 000 106 27 22 -5.7 -8.1 29.46 10 17 118 315 000 85 69 46 -6 -7 -6 000 107 27 23 -5.4 -7.8 29.46 10 18 117 314 000 84 68 45 -6 -7 -6 000 108 28 00 -5.1 -7.4 29.47 9 17 122 319 001 84 69 44 -6 -7 -6 000 109 28 01 -4.8 -7.2 29.47 8 17 124 320 001 84 67 43 -5 -6 -6 000 110 28 02 -4.7 -7.0 29.47 9 17 126 323 000 84 64 43 -5 -6 -6 000 111 28 03 -4.6 -6.8 29.46 8 17 127 324 000 85 61 43 -5 -5 -5 000 112 28 04 -4.8 -6.8 29.45 7 16 113 310 -002 86 50 43 -4 -4 -4 000 113 28 05 -5.1 -6.9 29.46 7 16 139 335 000 88 61 42 -4 -5 -5 000 114 28 06 -5.4 -7.1 29.46 7 17 144 340 001 90 65 42 -4 -5 -5 000 115 28 07 -5.7 -7.4 29.46 8 17 134 330 001 90 58 42 -4 -4 -4 000 116 28 08 -6.3 -7.8 29.46 7 15 129 325 001 92 47 42 -4 -3 -4 000 117 28 09 -6.7 -8.0 29.47 8 17 149 345 001 95 63 41 -4 -4 -4 000 118 28 10 -7.0 -8.5 29.47 8 17 141 337 003 93 61 39 -4 -4 -4 000 119 28 11 -7.1 -8.9 29.47 9 18 136 333 001 90 59 35 -4 -4 -5 000 120 28 12 -7.2 -9.1 29.47 9 17 132 329 000 89 60 31 -4 -4 -5 000 * 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.