USAP Grounding Zone (ACT) site lat/lon = (-84.3380,-163.5425) cell lat/lon = (-84.3284,-163.5930) Forecast initialized at 2026-10-17/12 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 17 12 -7.9 -13.2 28.60 23 29 136 332 000 62 56 50 -7 -8 -8 000 1 17 13 -9.6 -13.8 28.59 20 42 141 338 -002 74 57 55 -7 -8 -8 000 2 17 14 -8.8 -13.8 28.58 29 51 134 330 003 67 54 63 -7 -8 -9 000 3 17 15 -9.5 -15.0 28.58 30 53 135 332 001 64 46 62 -8 -7 -9 000 4 17 16 -8.7 -14.7 28.57 30 54 130 326 002 60 44 57 -7 -8 -9 000 5 17 17 -8.3 -14.2 28.56 30 52 132 328 001 61 48 56 -8 -8 -9 000 6 17 18 -8.3 -13.6 28.55 31 51 131 327 002 65 57 57 -8 -9-10 000 7 17 19 -7.6 -12.5 28.56 33 52 134 330 000 67 62 64 -7 -9-10 000 8 17 20 -7.8 -12.3 28.54 33 50 137 333 -001 70 69 66 -8 -9-10 000 9 17 21 -8.4 -12.7 28.53 34 50 136 332 -001 72 73 65 -9-10-10 000 10 17 22 -8.6 -12.7 28.54 34 50 135 331 002 74 74 70 -9-10 -9 000 11 17 23 -8.8 -12.8 28.56 34 51 135 331 000 75 74 66 -9-10 -9 000 12 18 00 -8.7 -12.7 28.55 36 53 133 330 -004 75 74 68 -9 -9 -9 000 13 18 01 -8.9 -13.0 28.58 37 53 134 330 -002 74 74 73 -9-10 -9 000 14 18 02 -8.8 -13.0 28.61 37 53 133 329 -003 73 72 65 -9-10 -9 000 15 18 03 -8.8 -13.0 28.64 37 53 133 329 -007 73 72 60 -9-10 -9 000 16 18 04 -8.9 -13.0 28.65 36 53 133 329 000 74 72 64 -9-10 -9 000 17 18 05 -9.2 -13.3 28.68 36 53 132 328 -012 74 72 59 -9-10 -8 000 18 18 06 -9.7 -13.9 28.69 36 53 131 327 -011 74 72 54 -10-10 -9 000 19 18 07 -10.3 -14.5 28.70 35 53 131 327 -013 74 71 57 -10-10 -9 000 20 18 08 -10.6 -14.8 28.72 36 54 129 326 -010 74 71 51 -10-11 -9 000 21 18 09 -10.9 -15.1 28.75 35 54 129 325 -015 74 70 49 -11-11 -9 000 22 18 10 -11.2 -15.4 28.76 35 53 130 327 -020 74 69 49 -11-11 -9 000 23 18 11 -11.3 -15.5 28.77 36 53 130 326 -007 75 70 49 -11-11 -9 000 24 18 12 -11.5 -15.6 28.79 35 53 131 327 -005 75 72 44 -11-11-10 000 25 18 13 -11.5 -15.6 28.81 36 52 131 327 -007 75 72 37 -11-12-10 000 26 18 14 -11.7 -15.9 28.83 35 51 131 327 -010 75 73 35 -12-12-11 000 27 18 15 -11.9 -16.1 28.85 35 51 131 327 -006 75 73 35 -12-12-12 000 28 18 16 -12.0 -16.2 28.86 34 50 132 329 -006 75 74 40 -12-13-12 000 29 18 17 -12.1 -16.2 28.86 33 48 133 329 -009 76 74 41 -12-13-12 000 30 18 18 -12.2 -16.3 28.87 31 47 133 330 -007 76 73 48 -12-13-12 000 31 18 19 -11.9 -16.1 28.87 31 46 134 330 -005 75 71 51 -12-13-13 000 32 18 20 -11.3 -15.5 28.88 31 46 134 330 -005 75 70 54 -11-12-12 000 33 18 21 -10.6 -14.8 28.87 32 47 133 330 -001 74 69 51 -11-12-12 000 34 18 22 -10.0 -14.3 28.87 32 46 134 330 004 74 69 48 -10-11-11 000 35 18 23 -9.8 -14.0 28.86 32 47 133 330 003 73 66 50 -10-11-10 000 36 19 00 -9.8 -14.0 28.86 31 47 132 329 000 73 65 51 -10-11-10 000 37 19 01 -9.6 -14.0 28.84 32 48 128 324 001 72 59 57 -10-10 -8 000 38 19 02 -9.7 -14.2 28.84 32 48 127 324 002 71 64 58 -10-11 -9 000 39 19 03 -10.1 -14.6 28.84 31 48 127 323 -003 71 64 59 -10-11 -9 000 40 19 04 -10.6 -15.1 28.83 32 50 130 326 002 72 66 59 -11-11-11 000 41 19 05 -10.5 -15.1 28.82 32 49 130 327 005 71 67 57 -11-12-12 000 42 19 06 -10.6 -15.2 28.81 32 49 131 328 007 71 67 58 -11-12-12 000 43 19 07 -10.6 -15.1 28.81 31 49 134 331 001 72 70 58 -11-12-13 000 44 19 08 -10.5 -15.2 28.80 33 50 135 331 004 70 68 60 -11-12-13 000 45 19 09 -10.8 -15.6 28.79 33 50 134 330 -002 70 67 60 -11-12-13 000 46 19 10 -11.2 -16.1 28.79 33 51 132 328 000 70 65 60 -11-12-13 000 47 19 11 -11.6 -16.6 28.78 33 52 131 327 001 69 64 58 -11-13-13 000 48 19 12 -12.0 -17.0 28.78 33 52 130 327 000 69 64 57 -12-13-14 000 49 19 13 -12.0 -17.0 28.77 33 53 131 327 003 69 64 56 -12-13-14 000 50 19 14 -12.2 -17.3 28.77 34 54 130 326 000 68 62 57 -12-13-14 000 51 19 15 -12.2 -17.4 28.78 34 54 130 326 -001 68 62 58 -12-13-14 000 52 19 16 -12.1 -17.4 28.78 36 55 130 326 002 67 60 56 -12-13-13 000 53 19 17 -12.0 -17.3 28.78 35 55 130 326 001 67 59 55 -12-13-13 000 54 19 18 -11.8 -17.1 28.77 35 54 128 325 001 67 58 55 -12-13-13 000 55 19 19 -11.5 -16.7 28.77 34 53 128 325 006 67 58 56 -11-12-13 000 56 19 20 -11.3 -16.5 28.77 33 52 129 325 005 67 58 56 -11-12-13 000 57 19 21 -11.1 -16.4 28.77 33 52 129 325 000 66 58 56 -11-12-13 000 58 19 22 -11.0 -16.4 28.79 33 52 129 325 000 66 57 55 -11-12-13 000 59 19 23 -11.0 -16.4 28.80 34 52 130 327 006 66 57 56 -11-12-13 000 60 20 00 -11.0 -16.4 28.80 34 52 130 327 005 65 57 56 -11-12-13 000 61 20 01 -11.0 -16.4 28.80 35 53 130 326 007 65 57 57 -11-12-13 000 62 20 02 -10.9 -16.3 28.79 36 54 131 327 004 66 57 57 -11-12-13 000 63 20 03 -11.0 -16.4 28.79 36 54 130 326 000 66 57 58 -11-12-13 000 64 20 04 -11.3 -16.7 28.81 35 54 130 326 000 66 57 58 -11-12-13 000 65 20 05 -11.6 -17.0 28.81 35 54 129 325 -002 65 56 57 -11-12-13 000 66 20 06 -11.7 -17.2 28.81 35 55 128 325 000 65 55 56 -11-12-13 000 67 20 07 -11.8 -17.5 28.82 35 55 128 324 -001 64 54 56 -12-12-13 000 68 20 08 -12.1 -17.7 28.83 35 56 126 322 -002 64 53 55 -12-13-13 000 69 20 09 -12.3 -18.0 28.84 35 56 125 321 001 64 54 54 -12-13-14 000 70 20 10 -12.6 -18.2 28.84 35 56 126 323 005 65 56 55 -12-13-14 000 71 20 11 -13.0 -18.5 28.85 34 55 127 324 000 66 58 56 -13-14-14 000 72 20 12 -13.4 -18.7 28.86 33 53 127 323 001 68 61 57 -13-14-15 000 73 20 13 -13.7 -18.8 28.87 32 51 127 324 000 69 63 59 -14-14-15 000 74 20 14 -13.7 -18.6 28.87 32 50 128 325 000 70 66 59 -14-15-15 000 75 20 15 -13.9 -18.7 28.89 30 48 128 325 001 72 68 59 -14-15-15 000 76 20 16 -14.0 -18.6 28.90 29 46 128 324 000 73 69 59 -14-15-15 000 77 20 17 -14.1 -18.6 28.91 28 45 128 325 003 74 69 61 -14-15-15 000 78 20 18 -14.2 -18.7 28.92 27 44 128 324 001 74 67 60 -14-15-15 000 79 20 19 -14.1 -18.6 28.92 27 43 128 324 001 74 65 59 -14-15-15 000 80 20 20 -13.8 -18.4 28.92 27 43 125 321 -001 73 62 57 -14-14-14 000 81 20 21 -13.5 -18.2 28.93 26 42 123 319 -002 73 61 58 -13-14-14 000 82 20 22 -13.2 -17.7 28.93 24 42 125 322 004 73 59 55 -13-14-14 000 83 20 23 -12.5 -17.0 28.93 25 43 125 321 001 73 59 52 -12-13-13 000 84 21 00 -11.7 -16.4 28.92 25 44 125 321 -002 71 58 51 -11-12-13 000 85 21 01 -11.0 -16.0 28.91 26 44 125 322 -004 69 57 51 -11-12-13 000 86 21 02 -10.7 -15.9 28.90 27 45 126 322 -002 67 55 51 -10-11-12 000 87 21 03 -10.6 -16.0 28.89 27 46 126 322 -003 65 52 46 -10-11-12 000 88 21 04 -10.8 -16.3 28.88 27 47 124 321 -002 64 46 34 -10-11-12 000 89 21 05 -10.6 -16.5 28.87 27 48 122 319 -006 62 40 32 -10-10-11 000 90 21 06 -10.8 -16.4 28.86 24 47 125 321 -008 64 36 32 -9 -9-11 000 91 21 07 -11.3 -16.8 28.86 22 45 129 325 000 64 36 31 -9-10-11 000 92 21 08 -11.3 -17.3 28.85 23 47 123 320 002 61 35 30 -9-10-11 000 93 21 09 -11.5 -17.5 28.84 23 46 128 324 001 62 35 30 -9-10-12 000 94 21 10 -11.8 -18.1 28.83 24 46 127 323 -001 59 36 32 -10-11-12 000 95 21 11 -11.9 -18.2 28.83 23 47 128 324 002 59 36 34 -10-11-12 000 96 21 12 -12.3 -18.1 28.82 22 46 128 324 003 62 35 36 -10-10-12 000 97 21 13 -12.6 -18.0 28.80 22 47 130 326 000 66 36 36 -10-11-12 000 98 21 14 -12.2 -18.6 28.79 24 49 124 321 000 60 36 37 -11-11-12 000 99 21 15 -11.9 -18.2 28.77 25 48 126 323 -012 60 36 37 -10-11-12 000 100 21 16 -12.1 -17.4 28.76 24 47 128 324 -006 66 34 37 -10-11-12 000 101 21 17 -11.5 -17.6 28.76 24 47 128 324 008 61 35 38 -10-11-12 000 102 21 18 -11.0 -17.8 28.74 27 50 124 320 -016 56 35 38 -10-11-12 000 103 21 19 -10.5 -17.1 28.73 28 49 129 326 -010 57 38 42 -10-11-12 000 104 21 20 -10.5 -17.2 28.72 30 50 128 325 -009 57 43 41 -10-11-13 000 105 21 21 -10.5 -16.5 28.72 27 49 133 329 -001 61 47 45 -10-11-13 000 106 21 22 -10.4 -16.4 28.72 29 49 131 327 000 61 49 48 -10-11-13 000 107 21 23 -10.4 -16.3 28.73 29 49 129 325 000 61 50 51 -10-11-13 000 108 22 00 -10.4 -16.1 28.73 29 48 129 325 000 63 53 53 -10-11-13 000 109 22 01 -10.4 -16.0 28.73 28 48 129 325 004 63 53 54 -10-11-13 000 110 22 02 -10.5 -16.1 28.72 29 49 127 324 -001 64 55 52 -10-11-13 000 111 22 03 -10.7 -16.3 28.73 29 49 128 324 002 64 55 51 -10-12-13 000 112 22 04 -10.9 -16.5 28.73 29 49 129 325 000 64 54 49 -11-12-13 000 113 22 05 -11.2 -16.8 28.74 29 50 128 324 000 65 53 48 -11-12-13 000 114 22 06 -11.3 -17.1 28.75 29 50 129 325 000 63 49 47 -11-12-13 000 115 22 07 -11.4 -17.5 28.76 28 51 129 326 -002 61 45 48 -11-11-13 000 116 22 08 -11.5 -17.8 28.76 27 52 128 325 -005 60 42 49 -10-11-12 000 117 22 09 -12.0 -17.7 28.77 26 50 131 328 -004 63 38 51 -10-11-12 000 118 22 10 -11.7 -17.9 28.77 26 50 130 326 -005 61 40 55 -10-11-13 000 119 22 11 -11.8 -17.9 28.78 28 50 131 327 -003 61 50 60 -11-12-13 000 120 22 12 -12.1 -18.0 28.78 28 49 130 327 -001 63 54 64 -11-13-14 000 * 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.