Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2025-12-23/00 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 23 00 -4.7 -5.5 29.32 10 13 82 56 000 96 96 95 -4 -5 -6 000 1 23 01 -5.1 -5.3 29.33 9 18 88 62 000 104104 99 -4 -5 -6 005 2 23 02 -4.5 -5.2 29.34 15 20 82 57 -002 98105 97 -5 -5 -6 000 3 23 03 -5.2 -5.7 29.35 14 20 75 49 000 101 95 98 -5 -5 -5 000 4 23 04 -5.2 -5.9 29.37 16 22 69 44 000 100 94107 -6 -5 -6 000 5 23 05 -5.8 -7.2 29.38 16 22 77 52 001 94 99100 -7 -6 -6 000 6 23 06 -6.5 -8.4 29.38 17 23 78 52 000 91102 98 -7 -6 -6 001 7 23 07 -7.0 -9.0 29.39 16 22 77 52 000 89105 96 -8 -7 -6 001 8 23 08 -7.1 -9.2 29.40 15 22 78 52 000 89103101 -8 -6 -6 001 9 23 09 -6.8 -8.7 29.39 14 21 77 52 000 90101 98 -7 -6 -6 000 10 23 10 -6.1 -7.7 29.39 14 19 79 54 000 91 99101 -7 -6 -6 000 11 23 11 -5.1 -6.7 29.40 15 19 80 54 000 91 98 96 -6 -6 -6 000 12 23 12 -4.5 -6.0 29.39 14 18 77 52 000 92100 95 -6 -6 -6 000 13 23 13 -4.0 -5.3 29.39 13 16 77 51 000 92100101 -5 -6 -6 000 14 23 14 -3.5 -4.8 29.39 13 15 75 50 000 92104 95 -5 -6 -6 001 15 23 15 -3.0 -4.4 29.39 13 15 74 48 000 91105 88 -4 -6 -5 000 16 23 16 -2.9 -4.4 29.39 12 14 73 48 000 90 93 84 -4 -5 -5 000 17 23 17 -2.7 -4.2 29.40 10 13 71 46 000 90 87 91 -4 -5 -5 000 18 23 18 -2.4 -3.9 29.40 9 12 68 42 000 89 97 90 -3 -5 -5 000 19 23 19 -2.5 -3.9 29.39 8 12 71 46 000 90102 89 -3 -5 -6 000 20 23 20 -2.3 -3.8 29.38 8 11 72 46 000 90100 88 -3 -5 -6 000 21 23 21 -2.6 -3.8 29.37 8 11 76 50 000 92 97 91 -3 -5 -6 000 22 23 22 -2.9 -3.9 29.38 7 10 83 57 000 94 98 88 -3 -5 -6 000 23 23 23 -3.4 -4.2 29.38 7 12 86 60 000 97102 85 -3 -5 -6 000 24 24 00 -3.4 -4.5 29.38 9 13 74 49 000 94 90 86 -4 -5 -6 000 25 24 01 -5.8 -6.0 29.38 8 14 83 58 000 105 85 92 -4 -5 -6 000 26 24 02 -4.7 -5.3 29.38 8 15 86 60 000 100 91102 -4 -5 -6 000 27 24 03 -4.6 -5.6 29.38 9 14 79 53 000 96 99 91 -4 -5 -6 000 28 24 04 -5.4 -6.4 29.37 9 15 89 63 000 96 92 98 -5 -5 -6 000 29 24 05 -6.4 -7.7 29.37 11 16 91 65 000 94 86 92 -6 -6 -6 000 30 24 06 -7.5 -9.3 29.36 13 19 87 62 000 92 75 91 -6 -6 -6 000 31 24 07 -7.8 -9.6 29.35 14 20 84 59 000 91 62 89 -6 -6 -7 000 32 24 08 -7.4 -9.8 29.35 13 20 80 54 000 87 67 89 -7 -6 -7 000 33 24 09 -6.8 -9.4 29.35 13 19 82 56 000 84 75 96 -6 -6 -7 000 34 24 10 -6.3 -8.7 29.34 13 18 80 55 000 85 82110 -6 -6 -7 000 35 24 11 -5.5 -7.7 29.33 12 16 79 53 000 86 91100 -6 -6 -6 000 36 24 12 -5.2 -7.3 29.32 11 15 77 51 000 87 92 93 -5 -6 -6 000 37 24 13 -4.5 -6.4 29.32 10 13 78 53 001 87 91 88 -5 -5 -6 000 38 24 14 -3.6 -5.6 29.32 9 11 80 54 000 87 78 88 -5 -5 -6 000 39 24 15 -3.0 -5.2 29.31 9 10 81 56 000 84 75 95 -4 -5 -6 000 40 24 16 -2.9 -5.1 29.31 9 10 82 56 000 85 75 97 -4 -5 -6 000 41 24 17 -2.7 -5.1 29.31 9 11 83 57 000 83 76103 -4 -5 -6 000 42 24 18 -2.6 -4.9 29.30 10 11 82 57 000 83 77108 -4 -5 -6 000 43 24 19 -2.6 -4.8 29.29 10 12 82 56 000 84 78108 -4 -5 -6 000 44 24 20 -2.9 -4.7 29.28 10 13 81 56 000 87 70110 -4 -4 -6 000 45 24 21 -3.7 -5.0 29.29 9 14 73 47 001 91 86 92 -4 -5 -6 000 46 24 22 -5.0 -5.6 29.28 7 13 78 52 000 99 74 55 -4 -5 -6 000 47 24 23 -6.3 -6.5 29.28 7 13 88 62 000 106 66 46 -4 -5 -6 000 48 25 00 -7.9 -8.1 29.28 7 15 96 70 000 107 65 45 -4 -5 -6 000 49 25 01 -9.0 -9.2 29.28 7 17 97 71 000 109 69 43 -4 -5 -6 000 50 25 02 -9.9 -10.2 29.28 8 19 95 69 000 110 70 44 -5 -6 -7 000 51 25 03 -10.2 -10.4 29.28 9 22 88 63 001 110 76 42 -5 -6 -6 000 52 25 04 -9.9 -10.1 29.28 12 20 83 57 000 110 71 44 -5 -6 -6 000 53 25 05 -9.6 -9.8 29.28 14 22 78 53 000 109 97 56 -6 -6 -7 000 54 25 06 -9.3 -9.5 29.28 14 22 74 48 000 109 98 79 -7 -6 -7 000 55 25 07 -7.5 -8.7 29.28 15 23 75 50 000 97 96 75 -7 -6 -7 000 56 25 08 -7.8 -10.8 29.27 15 26 77 51 001 82 99 95 -6 -6 -7 000 57 25 09 -7.3 -10.1 29.27 14 23 77 51 001 83 92 79 -5 -6 -7 000 58 25 10 -6.5 -9.1 29.26 13 20 79 54 000 84 66 66 -5 -5 -6 000 59 25 11 -6.1 -8.7 29.26 13 22 74 49 001 83 67 51 -6 -6 -5 000 60 25 12 -5.5 -8.3 29.26 12 20 74 48 000 81 66 52 -6 -5 -6 000 61 25 13 -4.7 -7.0 29.25 13 21 76 50 000 85 70 53 -5 -5 -6 000 62 25 14 -3.9 -6.5 29.25 14 21 78 52 000 82 78 60 -5 -5 -5 000 63 25 15 -3.5 -6.0 29.25 15 23 79 54 001 82 78 63 -4 -5 -6 000 64 25 16 -3.4 -6.0 29.24 16 23 79 54 001 81 76 82 -4 -4 -5 000 65 25 17 -3.2 -5.8 29.23 15 23 77 51 001 81 70 87 -4 -4 -5 000 66 25 18 -3.1 -5.5 29.23 15 24 77 52 002 82 71 92 -4 -4 -5 000 67 25 19 -3.3 -5.7 29.23 15 26 79 54 003 82 69 91 -3 -4 -5 000 68 25 20 -3.5 -6.2 29.22 14 26 82 57 001 81 66 98 -3 -4 -5 000 69 25 21 -3.5 -6.4 29.22 13 25 87 61 000 79 68100 -3 -3 -5 000 70 25 22 -4.0 -6.5 29.22 14 27 88 62 001 83 57 98 -3 -3 -5 000 71 25 23 -4.4 -6.8 29.21 14 26 90 64 001 84 70108 -2 -3 -4 000 72 26 00 -4.0 -6.5 29.21 16 29 85 59 000 83 66104 -3 -3 -5 000 73 26 01 -4.2 -6.6 29.21 16 27 89 63 000 83 67106 -2 -3 -5 000 74 26 02 -4.4 -6.9 29.20 17 30 87 62 000 82 67102 -4 -3 -5 000 75 26 03 -4.9 -7.4 29.20 18 30 84 59 000 83 70103 -5 -3 -5 000 76 26 04 -5.4 -7.9 29.20 17 29 82 57 001 84 79102 -5 -4 -5 000 77 26 05 -5.4 -8.0 29.19 19 29 84 59 000 82 72102 -6 -4 -5 000 78 26 06 -5.3 -8.2 29.19 19 30 84 59 001 80 74101 -6 -5 -5 000 79 26 07 -5.5 -8.3 29.19 19 30 82 56 000 82 87 99 -6 -5 -6 000 80 26 08 -5.6 -8.4 29.18 20 32 81 55 000 81 88102 -6 -5 -6 000 81 26 09 -5.1 -7.8 29.18 20 32 81 56 -001 82 87101 -6 -5 -6 000 82 26 10 -4.4 -6.8 29.19 20 31 81 55 -002 83 86 98 -5 -5 -6 000 83 26 11 -3.6 -6.0 29.19 20 31 80 55 000 82 87 99 -4 -5 -6 000 84 26 12 -3.1 -5.1 29.19 20 30 79 53 000 85 97 97 -4 -5 -6 000 85 26 13 -2.2 -4.1 29.19 22 30 77 51 000 85 96109 -3 -5 -6 000 86 26 14 -2.1 -4.0 29.18 22 31 77 51 -003 85 92109 -3 -4 -5 003 87 26 15 -1.9 -4.2 29.18 22 31 82 56 000 82 90109 -3 -4 -5 004 88 26 16 -1.4 -3.6 29.17 23 33 79 54 002 83 92108 -2 -4 -5 002 89 26 17 -1.3 -3.1 29.17 24 33 78 52 004 86 97108 -2 -4 -5 007 90 26 18 -1.3 -3.0 29.18 24 34 72 47 002 86 96108 -2 -4 -5 013 91 26 19 -1.3 -3.1 29.19 24 35 70 44 -003 85 93108 -2 -3 -4 003 92 26 20 -1.4 -3.1 29.19 24 34 72 46 -003 87 98102 -2 -4 -5 003 93 26 21 -1.6 -3.0 29.21 24 34 74 48 -001 89 99104 -2 -4 -5 009 94 26 22 -1.7 -3.0 29.22 24 34 74 48 000 90100107 -2 -4 -5 018 95 26 23 -2.0 -3.3 29.23 24 35 75 50 -001 91101106 -3 -4 -5 015 96 27 00 -2.2 -3.4 29.24 24 35 76 50 -002 92102105 -3 -4 -5 017 97 27 01 -2.8 -4.0 29.25 24 35 75 49 000 92102105 -3 -4 -5 019 98 27 02 -3.2 -4.4 29.25 23 35 74 48 002 92102 99 -4 -5 -5 014 99 27 03 -3.3 -4.5 29.26 23 35 72 47 002 93103102 -4 -5 -6 013 100 27 04 -3.4 -4.6 29.27 23 34 73 47 001 93104100 -4 -5 -6 017 101 27 05 -3.5 -4.7 29.27 24 34 75 49 001 93104100 -4 -5 -6 018 102 27 06 -3.7 -4.9 29.28 24 34 76 50 001 92104 99 -4 -5 -6 017 103 27 07 -3.7 -4.9 29.28 24 34 76 50 001 92104101 -4 -6 -6 012 104 27 08 -3.1 -4.4 29.29 24 34 74 48 000 92103103 -4 -5 -6 018 105 27 09 -2.6 -3.9 29.30 25 34 73 47 000 91103105 -4 -5 -6 020 106 27 10 -2.3 -3.6 29.31 25 34 72 47 000 91103107 -3 -5 -6 027 107 27 11 -1.8 -3.3 29.32 25 34 70 44 -002 89101108 -3 -4 -6 021 108 27 12 -1.7 -3.1 29.33 25 33 69 43 -002 89100108 -3 -4 -6 025 109 27 13 -1.6 -3.1 29.34 24 33 69 44 -001 88 99106 -3 -4 -6 030 110 27 14 -1.5 -3.0 29.34 24 32 69 44 -001 88100106 -3 -4 -5 027 111 27 15 -1.4 -2.9 29.34 24 32 70 44 -001 89100107 -3 -4 -5 028 112 27 16 -1.4 -2.8 29.34 23 31 69 44 -001 89 99107 -3 -4 -5 031 113 27 17 -1.2 -2.7 29.35 22 30 69 43 000 89 99106 -2 -4 -5 025 114 27 18 -1.3 -2.6 29.35 22 30 70 44 000 90100105 -2 -4 -5 030 115 27 19 -1.2 -2.5 29.35 22 30 71 45 000 89100104 -2 -4 -5 028 116 27 20 -1.3 -2.5 29.35 21 29 69 44 000 90100107 -2 -3 -5 021 117 27 21 -1.4 -2.6 29.36 21 28 70 44 000 91101108 -2 -4 -5 025 118 27 22 -1.6 -2.6 29.37 20 28 71 45 -001 92101107 -2 -4 -5 030 119 27 23 -1.8 -2.8 29.38 18 26 68 43 000 92101105 -2 -4 -5 023 120 28 00 -2.3 -3.3 29.39 16 25 71 45 -001 93101 99 -3 -4 -5 009 * 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.