Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2025-12-23/12 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 23 12 -4.2 -5.8 29.39 13 14 77 51 000 89 98 95 -5 -7 -7 000 1 23 13 -3.7 -5.3 29.39 13 16 75 49 000 90105 99 -5 -6 -7 000 2 23 14 -3.2 -4.9 29.39 13 15 71 45 000 89106 97 -5 -6 -7 000 3 23 15 -2.7 -4.4 29.38 12 14 69 43 000 88105 95 -4 -6 -7 000 4 23 16 -2.4 -4.3 29.38 12 14 67 41 000 86102 93 -4 -5 -6 000 5 23 17 -2.5 -4.5 29.39 12 14 62 37 000 86102 90 -4 -5 -7 000 6 23 18 -2.7 -4.4 29.39 12 13 63 38 000 88105 88 -4 -6 -7 000 7 23 19 -2.8 -4.6 29.39 10 13 63 38 000 88104 89 -4 -6 -7 000 8 23 20 -3.2 -4.6 29.38 9 12 61 36 000 90105 89 -4 -6 -6 000 9 23 21 -4.3 -5.3 29.36 7 12 74 48 000 95104 89 -4 -6 -6 000 10 23 22 -4.6 -5.4 29.37 6 12 81 56 000 98107 90 -5 -7 -6 000 11 23 23 -4.4 -5.2 29.36 9 12 66 41 000 97107 91 -5 -7 -6 000 12 24 00 -4.8 -5.2 29.36 9 11 66 40 000 102107 91 -6 -7 -6 000 13 24 01 -4.9 -5.2 29.37 9 11 68 43 000 103107 93 -6 -7 -7 000 14 24 02 -5.1 -5.4 29.35 10 11 75 49 000 103107100 -6 -7 -8 000 15 24 03 -5.2 -5.5 29.36 10 11 83 58 000 102107104 -6 -7 -8 000 16 24 04 -5.2 -5.6 29.36 11 12 90 65 000 103107104 -6 -7 -8 000 17 24 05 -5.5 -5.9 29.35 12 13 87 62 000 102107108 -6 -7 -6 000 18 24 06 -5.8 -6.1 29.34 12 13 80 55 000 104108100 -7 -8 -6 000 19 24 07 -5.7 -6.3 29.33 12 13 79 54 000 101108100 -7 -8 -6 000 20 24 08 -5.9 -6.3 29.32 12 14 81 55 000 103108104 -7 -8 -6 000 21 24 09 -5.7 -6.1 29.32 12 14 78 53 000 102108 97 -7 -8 -6 000 22 24 10 -5.5 -6.5 29.32 12 15 76 50 000 97 96102 -7 -7 -6 000 23 24 11 -6.0 -8.4 29.31 12 18 80 54 000 85 88 95 -7 -6 -6 000 24 24 12 -5.6 -7.9 29.30 11 16 79 53 000 86 90 74 -6 -6 -6 000 25 24 13 -4.6 -6.5 29.29 10 15 78 52 -001 89 84 54 -5 -5 -6 000 26 24 14 -3.9 -5.6 29.29 10 15 77 52 000 89 81 46 -5 -5 -6 000 27 24 15 -3.3 -5.2 29.29 10 15 77 52 000 87 80 42 -5 -5 -6 000 28 24 16 -3.0 -4.9 29.28 10 14 76 51 000 86 77 40 -4 -5 -5 000 29 24 17 -2.7 -4.7 29.28 10 14 76 51 000 85 73 39 -4 -4 -5 000 30 24 18 -2.6 -4.6 29.27 10 15 78 52 000 86 69 38 -4 -4 -5 000 31 24 19 -2.8 -4.7 29.26 10 16 80 54 000 86 66 37 -3 -4 -5 000 32 24 20 -3.1 -4.7 29.25 10 16 82 56 000 88 63 35 -3 -4 -5 000 33 24 21 -3.8 -5.3 29.25 10 18 85 60 000 90 57 37 -3 -4 -4 000 34 24 22 -4.7 -6.1 29.25 10 21 83 57 000 92 52 34 -3 -4 -4 000 35 24 23 -5.1 -6.4 29.25 12 24 79 53 000 94 63 35 -4 -4 -5 000 36 25 00 -5.5 -6.6 29.26 12 23 78 52 001 97 80 46 -4 -5 -5 000 37 25 01 -6.0 -6.8 29.26 13 24 79 53 000 99 98 55 -4 -5 -6 000 38 25 02 -6.0 -6.7 29.26 13 23 79 54 001 100102 57 -4 -5 -7 000 39 25 03 -5.0 -6.2 29.25 15 24 80 54 001 94 92 86 -5 -5 -6 000 40 25 04 -6.0 -7.0 29.25 15 26 85 59 000 97 88 98 -4 -5 -6 000 41 25 05 -6.1 -7.5 29.25 17 29 82 56 001 93 93 92 -4 -5 -6 000 42 25 06 -6.4 -8.0 29.25 18 29 83 57 001 92 92 95 -5 -5 -6 000 43 25 07 -6.4 -8.2 29.24 18 29 80 54 000 91 83 96 -6 -5 -6 000 44 25 08 -5.8 -7.3 29.24 20 29 83 57 000 93 83109 -6 -5 -6 000 45 25 09 -4.7 -6.5 29.24 21 30 79 53 001 88 84109 -6 -5 -6 000 46 25 10 -4.0 -6.0 29.24 21 31 80 55 000 86 82106 -5 -5 -6 000 47 25 11 -3.5 -5.6 29.24 21 31 80 54 000 85 80104 -5 -5 -6 000 48 25 12 -3.0 -5.5 29.24 20 30 77 51 -001 82 78105 -4 -5 -6 000 49 25 13 -2.5 -4.9 29.24 20 28 77 51 -002 82 85106 -4 -5 -6 000 50 25 14 -2.1 -4.4 29.24 20 27 76 50 -001 83 92102 -3 -5 -6 000 51 25 15 -1.7 -4.1 29.23 20 27 75 49 -002 82 92105 -3 -4 -6 000 52 25 16 -1.6 -4.2 29.23 20 27 78 52 -002 80 89 99 -3 -4 -5 000 53 25 17 -1.7 -4.3 29.22 20 28 80 54 -001 80 85107 -3 -4 -5 000 54 25 18 -1.6 -4.1 29.22 21 30 80 54 000 80 83108 -2 -4 -5 000 55 25 19 -1.5 -4.3 29.21 21 31 85 60 000 78 75107 -2 -3 -4 000 56 25 20 -1.7 -4.3 29.21 19 30 88 62 000 79 72107 -2 -3 -4 000 57 25 21 -1.8 -4.2 29.21 20 31 84 59 000 81 80106 -2 -3 -4 000 58 25 22 -1.7 -3.8 29.21 21 33 84 59 000 83 80101 -2 -3 -4 000 59 25 23 -1.8 -4.4 29.20 23 35 89 63 000 80 76103 -2 -3 -4 000 60 26 00 -1.9 -4.1 29.19 22 34 88 62 000 84 77 99 -2 -3 -3 000 61 26 01 -2.1 -4.1 29.19 22 35 86 61 003 85 82 94 -2 -3 -4 000 62 26 02 -2.0 -3.9 29.19 21 35 82 56 000 85 77 98 -2 -3 -4 000 63 26 03 -2.1 -4.3 29.19 21 36 74 48 001 83 86 99 -2 -3 -5 000 64 26 04 -2.8 -4.7 29.19 20 36 75 49 002 86 86103 -3 -4 -5 002 65 26 05 -3.1 -5.1 29.19 21 36 77 52 002 86 84 97 -3 -4 -5 002 66 26 06 -3.3 -5.3 29.19 21 36 77 51 002 86 85101 -3 -4 -5 001 67 26 07 -3.7 -5.7 29.20 22 36 79 53 002 86 88103 -4 -5 -5 001 68 26 08 -3.7 -5.5 29.20 22 35 81 55 002 89 89103 -4 -5 -6 001 69 26 09 -3.6 -5.5 29.20 23 35 82 57 002 87 90103 -4 -5 -6 001 70 26 10 -3.3 -5.3 29.20 23 35 83 57 002 85 91102 -4 -5 -6 000 71 26 11 -2.7 -4.7 29.20 23 33 80 55 000 85 95104 -4 -5 -6 000 72 26 12 -2.3 -4.4 29.21 23 33 77 52 000 84 94103 -3 -5 -6 000 73 26 13 -1.8 -4.0 29.21 23 32 77 51 000 83 94105 -3 -4 -6 000 74 26 14 -1.4 -3.7 29.21 23 32 78 52 002 82 89109 -2 -4 -5 000 75 26 15 -0.9 -2.8 29.21 24 33 78 52 003 85 96107 -2 -3 -5 005 76 26 16 -0.8 -2.4 29.21 24 33 76 51 003 87 97108 -2 -3 -4 020 77 26 17 -0.6 -2.1 29.21 25 33 75 49 -003 87 98107 -2 -3 -4 015 78 26 18 -0.6 -2.1 29.22 24 33 75 50 001 88 99107 -2 -3 -4 015 79 26 19 -0.6 -2.0 29.23 24 32 76 50 000 89 98107 -1 -3 -4 013 80 26 20 -0.6 -2.1 29.23 23 33 76 50 -001 88 98107 -1 -3 -4 010 81 26 21 -0.6 -2.1 29.24 23 33 77 51 000 88 98107 -1 -3 -4 005 82 26 22 -0.8 -2.2 29.25 23 34 75 50 -001 88 99107 -1 -3 -4 007 83 26 23 -0.9 -2.4 29.27 23 35 73 48 -001 88 98107 -1 -3 -4 006 84 27 00 -1.1 -2.4 29.28 23 34 72 46 -002 90 99107 -2 -3 -4 005 85 27 01 -1.3 -2.6 29.29 21 33 69 44 -001 90100106 -2 -3 -4 004 86 27 02 -1.5 -2.6 29.30 22 33 68 43 -001 92100104 -2 -3 -4 012 87 27 03 -1.8 -2.9 29.31 22 32 66 40 000 92101103 -2 -4 -4 026 88 27 04 -2.2 -3.2 29.31 22 32 70 44 000 93101101 -3 -4 -5 022 89 27 05 -2.4 -3.4 29.32 22 31 73 47 001 93101102 -3 -4 -5 024 90 27 06 -2.7 -3.7 29.33 21 31 72 46 002 93102103 -3 -4 -5 017 91 27 07 -2.7 -3.7 29.35 21 30 71 45 002 93104103 -4 -5 -5 018 92 27 08 -2.5 -3.6 29.36 21 29 69 43 001 93104102 -3 -5 -5 018 93 27 09 -2.3 -3.5 29.37 20 28 69 43 001 92104101 -3 -5 -5 015 94 27 10 -1.9 -3.2 29.38 20 27 69 43 002 91104102 -3 -5 -6 011 95 27 11 -1.5 -2.9 29.39 20 26 70 44 002 89103101 -3 -4 -5 010 96 27 12 -1.2 -2.5 29.40 19 25 70 44 001 89102108 -2 -4 -5 010 97 27 13 -0.8 -2.2 29.40 18 24 64 38 001 88100108 -2 -3 -5 015 98 27 14 -0.6 -2.1 29.40 17 23 64 38 000 87 99107 -2 -3 -5 011 99 27 15 -0.4 -2.0 29.40 17 23 63 37 000 87 98107 -2 -3 -4 010 100 27 16 -0.4 -2.0 29.41 16 22 63 37 000 87 98103 -2 -3 -4 011 101 27 17 -0.2 -1.6 29.41 16 22 66 41 000 88 99103 -1 -3 -4 009 102 27 18 -0.4 -1.6 29.42 16 21 66 40 -001 90 99104 -1 -3 -4 030 103 27 19 -0.4 -1.8 29.42 16 21 64 39 000 89 98101 -1 -3 -4 030 104 27 20 -0.7 -1.9 29.43 15 21 62 37 000 91100102 -2 -3 -4 024 105 27 21 -1.1 -2.3 29.43 15 20 65 39 000 90 98101 -2 -3 -4 030 106 27 22 -1.3 -2.1 29.44 14 20 70 44 000 94101107 -2 -3 -4 060 107 27 23 -1.3 -2.1 29.45 15 20 70 45 000 94103108 -2 -3 -4 037 108 28 00 -1.2 -1.9 29.45 12 17 60 34 000 95103106 -2 -3 -4 020 109 28 01 -1.8 -2.4 29.46 12 17 66 40 000 97103 98 -2 -3 -4 030 110 28 02 -1.9 -2.4 29.46 11 15 64 38 000 97101 99 -2 -3 -4 024 111 28 03 -2.7 -3.0 29.46 10 15 66 40 000 100101 98 -2 -4 -4 008 112 28 04 -2.6 -2.9 29.46 10 15 71 46 000 99101101 -3 -4 -5 011 113 28 05 -2.1 -2.7 29.46 10 14 64 38 000 97104 96 -3 -4 -5 014 114 28 06 -2.0 -2.8 29.47 10 15 61 35 -001 94103103 -3 -4 -5 004 115 28 07 -2.1 -2.7 29.47 11 15 64 39 000 96104103 -3 -4 -5 009 116 28 08 -1.6 -2.5 29.48 11 13 63 37 -001 93104 87 -3 -4 -5 004 117 28 09 -1.5 -2.5 29.49 11 13 67 42 000 93104 97 -3 -4 -5 002 118 28 10 -1.9 -2.6 29.50 12 13 74 48 -001 95104102 -3 -4 -5 005 119 28 11 -1.9 -2.7 29.51 12 14 74 49 000 95102103 -3 -4 -5 005 120 28 12 -1.8 -2.6 29.52 13 15 73 48 000 94 98101 -3 -4 -5 015 * 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.