USAP Grounding Zone (ACT) site lat/lon = (-84.3380,-163.5425) cell lat/lon = (-84.3284,-163.5930) Forecast initialized at 2026-05-03/12 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 03 12 -12.9 -18.8 29.03 23 26 135 332 000 62 56 57 -12-12-12 000 1 03 13 -13.9 -18.9 29.02 20 45 140 336 -002 69 54 69 -11-10-11 000 2 03 14 -13.4 -19.1 29.01 30 56 141 337 008 65 36 81 -13-10-10 000 3 03 15 -11.9 -16.7 28.99 30 54 137 334 003 70 61 92 -11 -9-10 000 4 03 16 -10.1 -14.9 28.95 31 52 135 332 000 70 64 89 -9 -9-10 000 5 03 17 -9.8 -14.8 28.94 28 51 137 333 000 67 52 91 -9 -9-10 000 6 03 18 -8.5 -14.0 28.91 33 55 137 333 003 63 51 90 -8 -8 -9 000 7 03 19 -8.5 -13.2 28.91 36 55 137 333 -003 69 69 91 -8 -9-10 001 8 03 20 -9.2 -13.6 28.88 34 53 135 331 -012 72 70 63 -9 -9 -9 000 9 03 21 -10.1 -13.6 28.90 32 51 135 331 005 79 71 61 -9 -9-10 000 10 03 22 -10.9 -15.2 28.94 31 52 136 333 000 73 67 68 -10-10-11 000 11 03 23 -11.0 -15.3 28.93 32 51 138 335 004 73 71 75 -10-11-12 000 12 04 00 -11.4 -15.2 28.96 29 46 138 334 000 78 77 67 -11-12-13 000 13 04 01 -12.7 -16.1 28.99 24 40 131 328 003 82 82 74 -12-13-15 000 14 04 02 -15.0 -18.4 29.04 23 40 114 310 009 84 89 83 -15-16-17 000 15 04 03 -15.1 -17.7 29.05 28 43 116 313 015 91 99 96 -16-17-18 005 16 04 04 -15.5 -18.7 29.09 29 42 115 312 003 86 98100 -16-18-19 016 17 04 05 -16.6 -20.0 29.12 28 40 117 313 006 84 97 99 -17-19-20 001 18 04 06 -16.9 -19.7 29.16 26 35 113 309 000 91101100 -18-19-20 006 19 04 07 -17.0 -19.6 29.21 22 29 109 306 -004 93104101 -18-19-20 009 20 04 08 -17.5 -20.2 29.25 19 26 99 296 -004 92102101 -18-20-20 012 21 04 09 -18.3 -21.1 29.31 17 25 94 290 -004 93102102 -19-21-20 015 22 04 10 -18.4 -21.2 29.36 16 23 94 290 -002 93 97102 -19-20-19 010 23 04 11 -17.4 -19.8 29.39 13 22 105 301 -005 96 98100 -18-18-17 010 24 04 12 -16.7 -18.9 29.39 10 17 120 316 -001 97 94 99 -17-17-17 006 25 04 13 -17.3 -19.1 29.39 9 16 138 334 -001 102 92 94 -17-16-16 002 26 04 14 -17.8 -19.5 29.38 6 11 141 338 002 104 94 99 -15-15-15 002 27 04 15 -19.3 -19.5 29.37 4 11 169 6 000 119 55 91 -13-14-14 001 28 04 16 -21.6 -22.3 29.36 5 9 195 31 000 122 54 76 -12-12-13 000 29 04 17 -23.4 -24.1 29.34 5 25 207 44 -001 124 64 81 -11-12-13 000 30 04 18 -21.5 -22.0 29.33 7 20 165 2 -003 121 69 80 -11-12-13 000 31 04 19 -20.1 -22.0 29.32 10 32 144 340 -001 102 72 75 -12-13-14 000 32 04 20 -18.7 -21.1 29.31 12 32 135 331 -001 95 76 78 -13-14-14 000 33 04 21 -17.7 -20.7 29.30 14 33 131 328 000 89 74 71 -13-14-15 000 34 04 22 -17.2 -20.3 29.29 15 34 124 321 -001 88 72 66 -14-15-16 000 35 04 23 -16.4 -19.8 29.28 17 35 120 317 000 85 69 66 -14-15-15 000 36 05 00 -16.5 -19.9 29.27 15 33 129 325 000 85 71 67 -14-15-15 000 37 05 01 -16.7 -19.9 29.27 16 35 127 324 000 86 72 68 -14-15-15 000 38 05 02 -17.1 -20.4 29.25 16 36 127 323 001 86 68 64 -13-14-15 000 39 05 03 -17.1 -20.9 29.23 17 34 127 323 000 81 63 63 -12-13-14 000 40 05 04 -17.3 -21.5 29.22 16 35 130 327 001 78 60 63 -12-12-14 000 41 05 05 -16.9 -21.0 29.19 17 38 134 331 001 78 63 64 -13-12-13 000 42 05 06 -16.2 -20.4 29.17 18 39 135 331 000 77 65 65 -12-12-13 000 43 05 07 -15.7 -19.8 29.15 19 41 136 333 -001 77 67 71 -12-12-13 000 44 05 08 -14.3 -18.2 29.12 21 41 136 332 000 79 82 81 -11-12-13 000 45 05 09 -13.2 -15.8 29.10 22 40 138 334 -002 89 91 92 -11-12-13 000 46 05 10 -12.2 -13.9 29.08 24 39 140 336 -001 97 97 97 -11-11-12 000 47 05 11 -11.5 -13.1 29.06 24 39 141 337 -002 97 97 96 -11-11-12 000 48 05 12 -10.8 -12.5 29.04 24 38 141 337 -004 96 97 91 -11-11-12 000 49 05 13 -10.2 -12.1 29.02 24 37 139 335 -002 93 91 78 -10-11-12 000 50 05 14 -10.7 -12.8 29.01 21 35 132 329 -005 91 87 74 -11-12-13 000 51 05 15 -12.1 -14.2 29.00 20 36 130 327 -003 93 82 69 -11-12-14 000 52 05 16 -13.4 -16.1 29.00 21 37 125 322 -003 89 82 66 -12-13-14 000 53 05 17 -14.1 -16.9 28.99 22 37 126 322 000 89 83 64 -13-14-13 000 54 05 18 -14.3 -17.2 28.99 23 39 126 323 000 88 82 61 -13-14-13 000 55 05 19 -14.5 -17.1 28.98 22 39 125 322 -001 91 81 58 -13-14-13 000 56 05 20 -14.4 -16.8 28.97 22 39 129 325 -002 92 77 55 -13-13-13 000 57 05 21 -13.9 -16.6 28.96 23 40 130 327 000 89 74 57 -13-13-13 000 58 05 22 -12.9 -16.1 28.96 25 42 130 327 000 84 74 62 -12-12-13 000 59 05 23 -11.7 -14.9 28.95 26 42 131 328 -003 83 78 66 -11-12-12 000 60 06 00 -10.7 -13.9 28.95 27 43 130 326 006 82 83 74 -11-11-12 000 61 06 01 -10.3 -13.7 28.93 30 46 130 326 003 80 81 69 -10-11-12 000 62 06 02 -9.8 -13.1 28.93 31 45 127 323 002 80 83 78 -10-11-13 000 63 06 03 -10.2 -13.9 28.92 29 45 129 326 001 77 78 68 -10-12-13 000 64 06 04 -11.1 -14.9 28.91 27 44 126 322 007 78 75 62 -11-12-13 000 65 06 05 -11.7 -15.4 28.90 25 44 126 322 004 79 75 59 -11-12-13 000 66 06 06 -12.3 -16.1 28.89 26 45 124 320 004 78 71 60 -12-12-13 000 67 06 07 -12.3 -16.0 28.87 27 45 126 323 000 79 72 55 -12-12-13 000 68 06 08 -12.9 -16.6 28.87 26 43 126 322 -006 80 71 55 -12-13-13 000 69 06 09 -13.5 -17.2 28.86 25 42 130 327 000 81 71 54 -13-13-13 000 70 06 10 -14.3 -17.5 28.86 22 40 131 327 -001 84 71 52 -13-13-13 000 71 06 11 -14.4 -17.3 28.86 23 39 129 326 -003 88 71 53 -13-12-13 000 72 06 12 -13.8 -16.1 28.85 23 41 131 327 -006 92 73 55 -12-12-13 000 73 06 13 -12.6 -15.0 28.85 26 42 130 327 -003 91 75 57 -12-12-12 000 74 06 14 -12.1 -14.7 28.84 24 41 125 321 -008 89 74 59 -11-11-12 000 75 06 15 -12.1 -14.6 28.83 22 40 126 323 -008 90 76 56 -12-12-12 000 76 06 16 -12.1 -14.7 28.83 22 39 129 325 -008 89 82 56 -11-12-13 000 77 06 17 -11.5 -14.6 28.83 24 39 127 323 -007 84 81 57 -11-12-13 000 78 06 18 -11.7 -15.0 28.83 24 38 127 323 001 82 81 58 -12-13-14 000 79 06 19 -11.9 -15.3 28.83 25 38 128 324 -002 82 81 57 -12-13-15 000 80 06 20 -13.1 -16.6 28.83 24 38 125 322 000 81 75 56 -13-14-15 000 81 06 21 -14.0 -17.8 28.83 24 37 120 316 000 79 71 56 -14-15-15 000 82 06 22 -14.6 -18.6 28.84 23 37 120 317 -003 78 70 53 -14-15-16 000 83 06 23 -15.3 -19.4 28.84 22 36 122 319 -007 79 70 53 -15-16-16 000 84 07 00 -16.3 -20.1 28.85 22 36 121 318 -001 81 73 55 -16-16-17 000 85 07 01 -16.7 -20.4 28.85 20 34 121 318 -002 83 75 57 -16-16-17 000 86 07 02 -17.0 -20.5 28.85 18 33 115 312 -004 84 78 56 -16-17-17 000 87 07 03 -17.3 -20.7 28.85 18 32 114 310 -006 86 81 52 -16-17-17 000 88 07 04 -20.1 -21.4 28.87 14 23 81 277 -010 112 93 49 -19-18-17 000 89 07 05 -26.4 -28.8 28.89 11 30 72 269 -004 105 88 51 -21-18-16 000 90 07 06 -28.8 -31.6 28.91 9 18 67 264 001 101 88 53 -24-18-17 000 91 07 07 -30.5 -33.3 28.92 6 9 76 273 000 103 89 56 -24-18-18 000 92 07 08 -31.6 -34.5 28.92 5 6 83 280 000 104 86 58 -21-18-18 000 93 07 09 -32.4 -35.3 28.91 3 5 73 269 -002 105 82 61 -19-17-18 000 94 07 10 -32.2 -35.0 28.90 2 5 65 262 000 105 83 62 -18-17-17 000 95 07 11 -29.7 -30.5 28.89 4 21 78 275 -001 127 81 63 -17-17-17 000 96 07 12 -29.3 -29.8 28.88 5 20 162 358 -001 131 76 65 -16-17-17 000 97 07 13 -19.4 -20.6 28.86 15 34 128 325 -001 109 66 67 -15-16-17 000 98 07 14 -16.6 -19.4 28.85 18 35 130 326 -004 91 65 72 -14-15-16 000 99 07 15 -14.9 -18.9 28.83 22 37 130 326 -005 78 66 67 -14-15-16 000 100 07 16 -15.1 -20.0 28.82 23 40 130 326 -003 72 63 60 -15-15-16 000 101 07 17 -16.1 -21.7 28.81 25 43 129 326 -006 67 56 64 -15-16-16 000 102 07 18 -15.7 -21.6 28.80 25 44 124 320 -009 64 50 56 -15-15-17 000 103 07 19 -15.4 -21.2 28.79 27 44 122 319 -008 65 54 54 -15-16-17 000 104 07 20 -16.2 -21.9 28.79 25 46 117 314 017 65 50 44 -15-16-17 000 105 07 21 -17.6 -23.0 28.78 22 44 122 318 -008 69 50 47 -15-16-17 000 106 07 22 -17.2 -22.7 28.78 23 44 125 321 004 67 54 58 -16-16-17 000 107 07 23 -17.1 -22.6 28.77 22 45 124 320 002 68 48 60 -15-15-16 000 108 08 00 -17.1 -22.5 28.77 23 44 124 321 005 68 56 62 -15-16-17 000 109 08 01 -17.5 -22.6 28.76 21 44 124 320 000 71 54 66 -15-15-16 000 110 08 02 -17.5 -22.3 28.76 21 44 122 319 -002 74 58 65 -15-15-17 000 111 08 03 -17.1 -22.0 28.76 24 43 121 318 -002 73 61 66 -16-16-17 000 112 08 04 -17.2 -22.0 28.77 25 42 125 321 -003 73 63 66 -16-17-18 000 113 08 05 -16.9 -21.7 28.78 25 43 127 323 -002 73 65 63 -16-17-18 000 114 08 06 -17.0 -21.8 28.78 26 44 127 324 000 73 63 57 -16-17-18 000 115 08 07 -17.0 -22.0 28.79 26 45 126 323 -002 72 61 54 -16-17-18 000 116 08 08 -16.9 -22.1 28.79 26 46 126 322 -001 70 58 51 -16-17-18 000 117 08 09 -16.5 -22.2 28.79 27 49 125 321 000 66 51 48 -16-16-18 000 118 08 10 -16.6 -22.4 28.78 26 48 122 319 -004 65 49 48 -15-16-17 000 119 08 11 -16.8 -22.7 28.77 27 49 122 319 -001 64 50 49 -16-17-17 000 120 08 12 -16.7 -22.6 28.77 26 50 120 316 000 65 50 46 -16-16-17 000 * 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.