Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2025-09-28/00 UTC MPAS cell scale: 5.5 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 28 00 -36.0 -39.7 29.19 2 2 80 55 000 100 90 19 -25-20-16 000 1 28 01 -34.3 -34.8 29.20 3 3 86 61 000 130 88 23 -25-20-16 000 2 28 02 -38.5 -39.8 29.23 6 7 70 45 000 129 84 22 -25-20-17 000 3 28 03 -40.1 -41.8 29.22 5 7 67 41 002 124 46 28 -25-20-17 000 4 28 04 -40.0 -41.6 29.22 3 5 43 18 000 124 43 29 -24-19-17 000 5 28 05 -40.8 -42.5 29.24 2 4 125 99 000 123 42 23 -24-19-18 000 6 28 06 -40.7 -42.3 29.24 3 4 148 123 -001 124 42 23 -23-19-18 000 7 28 07 -41.8 -43.6 29.24 2 4 105 80 000 124 50 24 -23-20-19 000 8 28 08 -42.6 -44.6 29.21 2 4 71 46 001 123 58 34 -23-20-19 000 9 28 09 -41.9 -43.9 29.22 2 3 91 65 001 122 51 52 -23-20-19 000 10 28 10 -41.2 -43.5 29.25 3 4 123 98 000 122 46 54 -22-20-19 000 11 28 11 -40.4 -42.7 29.25 2 5 113 88 000 118 48 56 -22-20-19 000 12 28 12 -39.5 -42.9 29.25 2 5 80 55 000 104 48 55 -23-20-19 000 13 28 13 -37.6 -41.5 29.26 1 4 78 52 000 97 52 58 -23-19-18 000 14 28 14 -35.6 -39.6 29.27 1 4 102 77 001 94 65 58 -22-19-18 000 15 28 15 -34.5 -38.4 29.28 1 4 61 35 001 93 47 60 -21-18-18 000 16 28 16 -33.4 -37.7 29.29 0 1 325 299 000 89 43 60 -20-18-18 000 17 28 17 -32.5 -36.9 29.29 2 2 223 197 000 88 52 51 -19-18-18 000 18 28 18 -31.5 -35.4 29.30 2 3 232 207 000 91 47 38 -19-17-18 000 19 28 19 -32.5 -35.0 29.30 1 1 194 168 000 105 39 29 -19-17-18 000 20 28 20 -36.9 -38.3 29.32 2 2 93 67 002 124 37 27 -19-17-18 000 21 28 21 -39.3 -41.0 29.33 3 3 83 58 003 124 36 28 -20-17-18 000 22 28 22 -38.8 -40.4 29.34 4 5 81 56 002 124 41 30 -21-17-17 000 23 28 23 -40.1 -41.9 29.34 4 4 88 63 000 124 47 33 -21-18-17 000 24 29 00 -42.9 -45.4 29.35 5 6 108 82 000 124 56 34 -23-19-18 000 25 29 01 -43.4 -45.9 29.36 5 9 98 72 000 124 51 33 -23-19-18 000 26 29 02 -43.2 -45.6 29.37 6 9 83 58 000 124 50 30 -23-19-18 000 27 29 03 -42.7 -45.0 29.37 5 8 75 50 000 124 51 31 -23-20-19 000 28 29 04 -41.7 -43.9 29.36 6 9 67 41 000 124 55 38 -22-20-20 000 29 29 05 -42.2 -44.6 29.36 5 9 62 37 000 122 67 40 -23-21-21 000 30 29 06 -42.9 -45.7 29.35 3 8 46 21 000 115 77 43 -24-22-21 000 31 29 07 -42.8 -45.4 29.36 3 8 52 26 000 117 66 42 -25-23-21 000 32 29 08 -42.4 -44.6 29.36 3 8 66 40 001 123 63 41 -26-23-21 000 33 29 09 -42.0 -44.5 29.35 3 9 88 63 001 122 64 38 -25-23-21 000 34 29 10 -41.2 -43.5 29.34 4 12 103 77 001 120 64 36 -25-24-21 000 35 29 11 -40.0 -42.4 29.34 4 14 105 79 003 117 65 29 -25-24-21 000 36 29 12 -38.4 -41.1 29.34 5 13 98 72 003 111 65 23 -25-23-22 000 37 29 13 -36.7 -39.2 29.34 6 11 86 60 001 112 67 25 -25-24-23 000 38 29 14 -35.4 -37.7 29.34 7 12 84 59 003 114 70 24 -26-24-23 000 39 29 15 -34.6 -36.9 29.33 7 12 89 63 003 115 71 22 -26-24-23 000 40 29 16 -34.2 -36.3 29.32 6 12 88 62 005 116 74 22 -26-24-23 000 41 29 17 -34.6 -36.5 29.32 5 13 93 68 005 124 88 22 -26-24-24 000 42 29 18 -35.7 -37.7 29.33 5 13 101 75 005 124 90 24 -26-24-24 000 43 29 19 -36.9 -38.8 29.32 7 13 90 65 005 124 79 23 -25-24-24 000 44 29 20 -38.3 -40.2 29.31 6 15 85 60 005 124 59 22 -25-24-24 000 45 29 21 -40.2 -42.3 29.30 6 13 89 64 003 124 68 22 -25-24-24 000 46 29 22 -40.8 -43.0 29.29 6 12 86 61 002 124 78 22 -25-25-23 000 47 29 23 -40.9 -43.0 29.30 6 10 79 54 002 124 81 24 -25-26-23 000 48 30 00 -40.8 -42.9 29.30 6 11 78 52 000 124 84 29 -25-26-23 000 49 30 01 -40.9 -42.9 29.28 6 9 82 56 000 124 86 30 -26-26-24 000 50 30 02 -41.8 -43.9 29.28 6 10 87 62 -001 124 85 30 -26-26-23 000 51 30 03 -42.9 -45.2 29.27 6 11 82 56 000 124 67 31 -26-26-23 000 52 30 04 -42.5 -44.6 29.26 6 17 62 36 -001 124 53 32 -27-25-24 000 53 30 05 -43.0 -45.1 29.26 5 14 69 44 000 124 54 33 -27-26-24 000 54 30 06 -44.9 -47.3 29.25 5 12 86 60 000 124 49 37 -27-26-25 000 55 30 07 -44.7 -47.0 29.25 6 15 89 64 -001 126 54 40 -28-26-25 000 56 30 08 -44.1 -46.4 29.25 7 16 103 77 000 125 62 41 -28-26-25 000 57 30 09 -43.7 -45.9 29.24 7 20 109 84 000 126 69 41 -27-26-25 000 58 30 10 -42.4 -44.6 29.24 8 23 104 79 000 124 80 41 -27-26-26 000 59 30 11 -39.1 -41.0 29.24 8 21 98 73 000 124 74 39 -27-26-26 000 60 30 12 -34.8 -36.5 29.23 9 24 83 57 000 124 81 36 -27-26-26 000 61 30 13 -33.3 -35.2 29.23 9 23 78 53 000 119 78 33 -27-27-26 000 62 30 14 -32.9 -35.5 29.24 8 21 71 46 -001 109 68 39 -26-27-26 000 63 30 15 -32.1 -35.7 29.24 10 24 75 49 000 95 67 40 -25-26-26 000 64 30 16 -32.4 -34.8 29.24 11 20 81 55 000 110 63 43 -25-25-26 000 65 30 17 -32.7 -35.1 29.24 13 25 87 61 000 110 79 40 -26-25-26 000 66 30 18 -31.0 -33.3 29.23 16 27 80 54 -001 110 99 35 -26-25-26 000 67 30 19 -30.5 -32.8 29.23 16 29 79 53 -001 109 99 38 -26-26-26 000 68 30 20 -30.5 -33.5 29.24 19 34 75 50 000 101101 38 -29-26-25 000 69 30 21 -28.2 -31.9 29.24 20 37 75 49 000 91113 43 -27-26-25 000 70 30 22 -26.2 -30.8 29.24 19 35 74 48 000 80 89 47 -24-25-25 000 71 30 23 -26.1 -30.5 29.24 19 31 76 50 -001 82 94 57 -24-24-24 000 72 01 00 -26.0 -30.1 29.25 22 35 73 47 000 85110 60 -26-25-24 000 73 01 01 -24.7 -29.3 29.25 20 37 75 50 000 79 79 52 -23-24-25 000 74 01 02 -23.6 -27.7 29.24 23 37 76 51 000 83100 69 -23-24-24 000 75 01 03 -22.5 -26.4 29.24 24 37 76 51 000 84 98 88 -23-23-24 000 76 01 04 -22.1 -25.9 29.23 25 38 75 50 -001 86103 90 -22-23-24 001 77 01 05 -21.8 -25.4 29.23 25 38 75 49 -002 87104 74 -22-23-24 001 78 01 06 -21.0 -25.5 29.24 24 40 74 49 -001 78 86 87 -21-22-23 000 79 01 07 -20.6 -25.1 29.24 26 43 72 46 -001 78 92 97 -21-22-23 000 80 01 08 -19.6 -24.7 29.23 23 40 72 46 000 72 72111 -19-20-21 000 81 01 09 -19.5 -23.4 29.23 27 39 71 45 -002 83102 98 -20-21-22 000 82 01 10 -19.8 -23.6 29.24 28 41 69 44 000 83100102 -20-22-22 000 83 01 11 -18.6 -22.7 29.24 28 39 69 43 -002 80 92 97 -19-21-22 001 84 01 12 -17.7 -21.7 29.24 27 42 68 43 -001 81 85 99 -18-20-21 008 85 01 13 -16.9 -20.8 29.23 29 41 68 42 -001 80 90 97 -18-19-21 007 86 01 14 -16.0 -20.1 29.22 29 41 66 41 -001 78 86 98 -17-18-20 003 87 01 15 -15.4 -19.3 29.21 29 41 67 42 000 80 90100 -16-18-19 003 88 01 16 -14.7 -17.5 29.21 28 41 66 41 -001 89 98102 -15-17-18 016 89 01 17 -14.3 -16.8 29.20 28 40 66 41 -001 91100102 -15-16-18 027 90 01 18 -14.1 -16.5 29.19 28 41 68 42 000 92100103 -15-16-17 033 91 01 19 -13.7 -16.1 29.18 28 41 68 42 000 92 99102 -14-16-17 041 92 01 20 -13.6 -15.9 29.17 28 42 69 43 000 93100103 -14-15-17 041 93 01 21 -13.5 -15.9 29.17 29 42 69 44 -002 92100102 -14-15-17 039 94 01 22 -13.6 -15.9 29.17 30 42 70 44 -003 92100102 -14-15-17 038 95 01 23 -13.4 -15.7 29.17 30 43 69 44 -001 92100102 -14-15-17 038 96 02 00 -13.2 -15.6 29.17 29 42 69 44 -002 92101103 -14-15-16 038 97 02 01 -13.1 -15.4 29.17 29 42 70 44 000 93101102 -14-15-16 035 98 02 02 -13.0 -15.3 29.16 29 42 70 44 000 92101102 -14-15-16 032 99 02 03 -12.8 -15.2 29.16 28 41 70 44 001 92101103 -13-15-16 023 100 02 04 -12.6 -14.9 29.15 27 41 71 46 001 93101105 -13-14-16 018 101 02 05 -12.4 -14.6 29.14 27 40 73 47 001 93101105 -13-14-15 017 102 02 06 -12.3 -14.4 29.14 26 40 74 49 002 93100106 -13-14-15 014 103 02 07 -12.1 -14.3 29.14 27 40 76 50 002 92100106 -12-14-15 016 104 02 08 -11.8 -14.1 29.14 27 40 77 52 002 92100104 -12-13-15 011 105 02 09 -11.4 -13.6 29.13 27 40 79 54 003 92100104 -12-13-14 014 106 02 10 -11.3 -13.6 29.13 27 40 79 54 002 91 98104 -12-13-14 013 107 02 11 -11.2 -13.8 29.11 26 39 81 55 003 87 91106 -12-13-14 007 108 02 12 -11.5 -14.6 29.10 25 39 82 56 002 84 83108 -12-12-13 002 109 02 13 -11.3 -15.1 29.09 25 38 81 56 004 77 76103 -11-12-13 000 110 02 14 -11.2 -15.1 29.08 23 35 78 52 003 76 76 97 -11-12-14 002 111 02 15 -11.0 -15.0 29.07 20 32 79 54 -001 76 69101 -11-12-13 000 112 02 16 -10.7 -14.7 29.05 18 30 85 60 000 75 60 83 -10-11-12 000 113 02 17 -12.1 -15.7 29.04 16 30 81 55 -001 79 53 90 -10-10-11 000 114 02 18 -13.3 -16.8 29.03 13 26 83 57 000 81 45 72 -9-10-11 000 115 02 19 -14.0 -17.6 29.01 11 25 90 65 000 81 50 56 -9-10-11 000 116 02 20 -16.1 -18.9 28.99 9 21 98 72 -002 88 48 46 -9-10-11 000 117 02 21 -16.4 -18.8 28.98 7 19 104 78 -001 94 44 49 -9-10-11 000 118 02 22 -15.9 -18.9 28.96 6 18 100 74 000 86 40 54 -9-10-10 000 119 02 23 -14.8 -18.1 28.95 6 16 89 64 000 83 43 48 -10-10-10 000 120 03 00 -14.1 -17.4 28.94 6 23 93 67 -001 82 56 58 -11-11-11 000 * 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.