Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2025-12-22/00 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 22 00 -9.3 -10.3 29.11 1 1 34 9 000 90 83 43 -4 -4 -5 000 1 22 01 -12.4 -12.9 29.13 4 4 91 65 000 112 92 50 -4 -5 -6 000 2 22 02 -14.5 -14.8 29.14 6 14 95 70 -001 115101 55 -5 -5 -6 000 3 22 03 -12.4 -12.7 29.15 8 18 86 60 000 112105 63 -6 -5 -6 000 4 22 04 -8.4 -9.3 29.16 13 20 81 56 000 101105 76 -6 -5 -7 000 5 22 05 -8.1 -9.6 29.19 14 17 79 54 000 94107 94 -6 -7 -8 000 6 22 06 -8.2 -9.9 29.19 14 19 80 55 000 93107105 -8 -7 -8 000 7 22 07 -8.4 -10.0 29.18 14 19 83 57 -001 94107106 -8 -7 -8 000 8 22 08 -9.2 -11.6 29.20 15 20 81 55 -001 88107105 -8 -7 -8 000 9 22 09 -9.4 -12.4 29.22 15 20 83 57 -001 82105103 -9 -8 -8 000 10 22 10 -9.0 -11.2 29.22 14 18 84 58 000 90 96 98 -9 -8 -8 000 11 22 11 -8.5 -9.9 29.23 14 19 75 50 000 96 95102 -10 -8 -8 000 12 22 12 -7.7 -9.1 29.24 16 20 76 51 000 96 95102 -9 -8 -8 000 13 22 13 -7.5 -8.9 29.24 15 19 76 51 -001 95 92102 -9 -8 -8 000 14 22 14 -7.1 -8.5 29.25 14 18 79 54 -001 94 90103 -8 -7 -8 000 15 22 15 -6.5 -8.2 29.26 14 17 77 52 -002 91 93103 -8 -7 -8 000 16 22 16 -5.8 -7.6 29.28 14 17 78 52 -001 91 98111 -7 -7 -8 000 17 22 17 -5.6 -7.4 29.27 14 18 84 58 -001 90 99111 -7 -7 -7 000 18 22 18 -5.4 -6.8 29.28 14 18 81 56 -002 93103110 -7 -7 -7 000 19 22 19 -4.7 -5.9 29.29 16 21 84 58 -001 94107102 -6 -7 -7 003 20 22 20 -4.8 -6.2 29.29 18 24 83 58 -001 93103 99 -6 -7 -7 002 21 22 21 -5.2 -6.5 29.29 18 25 87 62 000 94100109 -6 -7 -7 012 22 22 22 -5.6 -7.0 29.30 20 28 83 58 -002 93101100 -6 -6 -6 008 23 22 23 -5.6 -6.8 29.31 19 27 81 55 000 94103109 -6 -6 -6 015 24 23 00 -5.1 -6.3 29.32 20 27 78 52 000 95102109 -5 -5 -6 022 25 23 01 -4.9 -6.0 29.34 18 23 76 51 000 96106102 -5 -6 -6 007 26 23 02 -4.7 -5.7 29.35 17 23 73 47 000 96106110 -5 -6 -6 025 27 23 03 -5.0 -6.1 29.37 18 23 80 55 -003 96105101 -5 -6 -6 011 28 23 04 -4.9 -5.9 29.37 16 22 75 50 000 96105 98 -6 -6 -6 004 29 23 05 -5.1 -6.2 29.38 16 22 76 50 -002 96106 97 -6 -6 -6 002 30 23 06 -5.0 -6.0 29.39 15 20 76 51 -002 96106 97 -6 -6 -6 003 31 23 07 -4.8 -5.8 29.39 15 20 75 49 000 96106100 -6 -6 -6 015 32 23 08 -5.0 -6.0 29.40 16 20 75 49 001 96105 98 -6 -6 -6 025 33 23 09 -4.9 -6.0 29.41 16 20 77 51 000 95105102 -6 -6 -6 020 34 23 10 -4.2 -5.3 29.42 15 20 75 49 000 94106103 -5 -6 -7 014 35 23 11 -3.6 -4.8 29.42 15 18 71 46 001 92106100 -5 -6 -6 004 36 23 12 -3.5 -4.8 29.42 14 17 71 45 001 92106102 -5 -6 -6 001 37 23 13 -3.4 -4.8 29.42 14 16 71 46 000 91106 98 -5 -6 -6 000 38 23 14 -3.5 -4.9 29.42 13 16 70 45 000 91 97 87 -5 -6 -6 000 39 23 15 -3.2 -4.7 29.42 12 14 68 42 000 90104 85 -4 -6 -6 000 40 23 16 -3.0 -4.5 29.42 11 13 65 39 000 91106 85 -4 -6 -6 000 41 23 17 -3.0 -4.5 29.42 10 12 64 39 001 89105 85 -4 -6 -6 000 42 23 18 -2.7 -4.4 29.42 10 11 70 44 000 88105 87 -4 -5 -6 000 43 23 19 -2.4 -4.5 29.41 10 12 68 42 000 85102 91 -4 -5 -6 000 44 23 20 -2.8 -4.9 29.41 10 12 62 36 000 85 96 93 -4 -5 -7 000 45 23 21 -4.5 -5.7 29.41 7 13 70 44 000 93 88102 -4 -6 -7 000 46 23 22 -6.0 -6.6 29.42 7 13 74 48 000 101101105 -5 -6 -7 000 47 23 23 -6.3 -7.3 29.42 6 14 74 48 000 97 99 99 -5 -6 -7 000 48 24 00 -8.0 -8.4 29.41 6 12 82 57 000 107 92 92 -5 -6 -7 000 49 24 01 -9.3 -9.5 29.41 5 13 105 79 000 109 87 94 -5 -6 -7 000 50 24 02 -10.1 -10.4 29.40 6 14 107 82 000 110 86 89 -6 -7 -7 000 51 24 03 -10.6 -10.8 29.40 7 16 104 78 000 110100 85 -6 -7 -7 000 52 24 04 -10.6 -10.9 29.40 8 18 96 71 000 110 99 84 -6 -6 -8 000 53 24 05 -7.5 -9.0 29.39 9 15 87 62 000 95107 84 -6 -7 -8 000 54 24 06 -6.7 -8.3 29.38 12 18 88 63 000 93 98 91 -6 -7 -7 000 55 24 07 -6.8 -8.2 29.38 13 20 81 56 -001 95 98110 -7 -7 -7 003 56 24 08 -6.6 -8.4 29.37 13 18 77 52 000 91 98 93 -6 -6 -7 003 57 24 09 -6.6 -8.9 29.37 12 17 79 54 000 87 97110 -6 -6 -7 002 58 24 10 -6.0 -8.2 29.37 12 16 79 53 000 87 95 99 -6 -6 -7 001 59 24 11 -5.3 -7.2 29.36 11 14 75 50 000 89 94 98 -6 -6 -6 000 60 24 12 -4.5 -6.1 29.36 10 12 72 47 000 90 94 95 -6 -6 -7 000 61 24 13 -4.0 -5.6 29.35 9 10 74 48 000 90 92103 -5 -5 -6 000 62 24 14 -3.6 -5.3 29.34 9 10 75 50 000 89 87100 -5 -5 -6 000 63 24 15 -3.2 -5.1 29.34 9 10 73 47 000 87 74 93 -4 -5 -6 000 64 24 16 -3.0 -5.0 29.33 9 12 72 47 000 86 84 94 -4 -5 -6 000 65 24 17 -2.7 -4.8 29.33 10 13 70 44 000 85 97106 -4 -5 -6 000 66 24 18 -2.6 -4.5 29.33 11 13 72 46 000 87100106 -4 -5 -6 003 67 24 19 -2.6 -4.3 29.33 10 13 72 46 000 87100102 -4 -5 -6 006 68 24 20 -2.7 -4.2 29.33 10 13 74 48 000 89100106 -4 -5 -6 002 69 24 21 -2.8 -4.1 29.33 11 14 73 48 000 92 98101 -4 -5 -6 002 70 24 22 -3.0 -4.1 29.33 10 14 76 51 000 93 99100 -4 -5 -6 002 71 24 23 -3.3 -4.3 29.33 9 14 79 54 000 94100 99 -4 -5 -6 000 72 25 00 -3.5 -4.5 29.33 9 14 82 56 000 95 97107 -4 -5 -6 000 73 25 01 -3.8 -4.7 29.33 9 15 82 57 000 96101110 -4 -5 -6 003 74 25 02 -3.9 -4.9 29.33 10 15 76 50 -001 96103109 -4 -5 -6 002 75 25 03 -5.3 -6.0 29.32 10 15 82 56 000 99 94 99 -5 -5 -6 000 76 25 04 -6.2 -7.2 29.32 10 16 85 60 -001 97 80109 -4 -5 -6 000 77 25 05 -5.9 -7.2 29.32 10 14 85 59 000 94 90108 -4 -5 -6 000 78 25 06 -6.0 -7.1 29.32 10 14 82 57 000 96 93105 -5 -5 -6 000 79 25 07 -5.9 -6.8 29.32 10 15 81 55 -001 98 95106 -5 -5 -7 000 80 25 08 -6.0 -7.1 29.32 10 15 78 53 -001 96 86107 -6 -5 -7 000 81 25 09 -6.6 -8.1 29.33 11 16 76 51 -001 94 69 93 -6 -6 -7 000 82 25 10 -6.3 -8.2 29.33 10 16 77 52 -001 90 74 84 -6 -6 -7 000 83 25 11 -5.9 -8.0 29.33 10 15 82 56 000 88 78 70 -6 -6 -7 000 84 25 12 -5.4 -8.0 29.33 10 16 82 56 -001 83 80 62 -6 -6 -7 000 85 25 13 -5.0 -7.8 29.33 11 16 85 59 000 81 63 53 -6 -5 -6 000 86 25 14 -4.8 -7.1 29.33 11 15 82 56 000 85 67 48 -6 -5 -6 000 87 25 15 -4.3 -6.0 29.33 12 17 77 52 000 90 70 46 -5 -5 -6 000 88 25 16 -4.0 -5.8 29.33 13 18 75 49 000 88 64 44 -5 -5 -5 000 89 25 17 -3.9 -5.6 29.33 13 18 74 48 000 89 71 43 -5 -5 -5 000 90 25 18 -4.0 -5.6 29.33 13 19 75 49 000 89 79 38 -5 -5 -5 000 91 25 19 -4.1 -5.6 29.33 13 20 75 50 000 91 83 36 -5 -5 -5 000 92 25 20 -4.6 -6.0 29.34 13 21 75 50 000 92 79 37 -5 -5 -5 000 93 25 21 -5.3 -6.7 29.35 12 22 76 50 000 93 92 43 -5 -6 -6 000 94 25 22 -6.1 -7.0 29.35 12 22 78 53 000 98 83 41 -5 -6 -6 000 95 25 23 -6.8 -7.1 29.36 11 22 79 53 000 105 82 47 -5 -6 -6 000 96 26 00 -7.5 -7.7 29.36 11 22 81 56 000 107 86 53 -5 -6 -6 000 97 26 01 -8.5 -8.7 29.36 10 22 84 59 000 108 88 66 -5 -6 -6 000 98 26 02 -10.1 -10.4 29.36 9 23 90 65 000 110 90 57 -5 -6 -6 000 99 26 03 -11.5 -11.8 29.36 8 22 90 65 001 111 71 64 -4 -5 -7 000 100 26 04 -11.3 -11.6 29.36 10 23 90 65 001 111 71 76 -4 -5 -7 000 101 26 05 -10.5 -10.8 29.36 9 24 83 57 001 110 77 81 -4 -5 -6 000 102 26 06 -9.9 -11.3 29.37 13 23 84 58 001 97 83 92 -6 -5 -6 000 103 26 07 -9.3 -11.4 29.37 14 22 88 62 000 90 84 76 -6 -6 -6 000 104 26 08 -8.9 -10.7 29.37 14 25 82 57 000 93 84 66 -6 -6 -7 000 105 26 09 -7.9 -10.1 29.37 15 25 80 55 000 89 88 89 -6 -7 -6 000 106 26 10 -6.7 -8.6 29.37 14 23 81 55 000 89 87 72 -6 -6 -7 000 107 26 11 -5.8 -8.0 29.36 13 21 83 57 000 86 86 67 -5 -6 -7 000 108 26 12 -5.1 -7.4 29.36 13 20 80 54 000 85 83 82 -5 -6 -7 000 109 26 13 -4.4 -7.0 29.36 14 22 77 52 000 82 72 94 -5 -6 -7 000 110 26 14 -4.2 -6.7 29.36 14 21 78 53 000 83 73 87 -5 -6 -6 000 111 26 15 -3.9 -6.7 29.35 14 21 80 55 000 80 68 95 -5 -5 -6 000 112 26 16 -3.5 -6.0 29.35 14 21 76 51 000 83 85 96 -5 -5 -6 000 113 26 17 -3.1 -5.7 29.35 14 21 80 54 001 81 77 98 -4 -5 -6 000 114 26 18 -2.9 -5.3 29.35 13 21 84 58 001 82 72 96 -3 -4 -5 000 115 26 19 -2.9 -5.2 29.35 12 22 90 64 001 82 72102 -3 -4 -5 000 116 26 20 -3.1 -5.4 29.35 11 23 91 65 001 83 72102 -2 -4 -5 000 117 26 21 -2.6 -4.9 29.35 12 22 92 66 000 82 71 99 -2 -3 -4 000 118 26 22 -2.6 -4.8 29.36 12 23 91 65 000 83 73 96 -2 -3 -4 000 119 26 23 -2.4 -4.4 29.36 12 23 90 65 000 85 76 95 -2 -3 -4 000 120 27 00 -2.5 -4.1 29.36 11 22 91 65 000 88 79 99 -2 -3 -4 000 * 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.