Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-01-12/12 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 12 12 -8.1 -11.1 29.09 6 7 82 56 000 78 59 41 -8 -7 -7 000 1 12 13 -7.3 -10.2 29.10 5 7 77 51 000 83 60 43 -8 -7 -7 000 2 12 14 -6.7 -9.7 29.11 5 7 71 45 000 82 58 43 -7 -7 -6 000 3 12 15 -6.2 -9.3 29.12 4 6 68 43 000 82 57 42 -7 -6 -6 000 4 12 16 -6.0 -8.9 29.11 3 4 63 37 000 82 57 42 -7 -6 -6 000 5 12 17 -5.8 -8.7 29.11 2 3 70 44 000 82 56 42 -7 -6 -6 000 6 12 18 -5.7 -8.5 29.11 2 3 76 50 000 83 55 40 -7 -6 -6 000 7 12 19 -5.9 -8.0 29.11 2 3 82 57 000 85 54 39 -6 -6 -6 000 8 12 20 -6.3 -8.6 29.12 2 2 77 52 000 87 53 38 -6 -6 -6 000 9 12 21 -7.1 -8.9 29.11 2 3 77 52 000 92 51 37 -6 -5 -6 000 10 12 22 -8.3 -9.2 29.10 3 3 47 22 000 100 50 37 -6 -5 -6 000 11 12 23 -9.5 -9.6 29.10 3 4 56 30 000 109 50 36 -6 -5 -6 000 12 13 00 -11.6 -12.1 29.11 3 4 56 31 000 111 50 36 -6 -5 -6 000 13 13 01 -13.6 -13.9 29.10 3 6 66 40 000 114 52 36 -6 -6 -6 000 14 13 02 -15.0 -15.2 29.10 3 7 77 51 000 115 53 37 -6 -6 -6 000 15 13 03 -15.2 -15.4 29.10 3 8 90 65 000 115 53 37 -6 -6 -6 000 16 13 04 -14.9 -15.1 29.10 4 9 99 73 000 115 54 38 -7 -6 -6 000 17 13 05 -14.0 -14.8 29.10 4 10 101 76 000 108 57 40 -7 -6 -6 000 18 13 06 -12.5 -13.7 29.08 5 11 95 69 000 103 59 41 -7 -6 -7 000 19 13 07 -11.5 -12.2 29.07 6 11 79 53 000 106 54 44 -7 -7 -7 000 20 13 08 -10.5 -11.4 29.07 7 10 75 50 000 103 57 47 -7 -7 -7 000 21 13 09 -9.3 -10.4 29.07 7 11 79 53 000 99 63 49 -7 -7 -7 000 22 13 10 -8.5 -9.9 29.06 7 10 81 56 000 97 51 51 -7 -7 -7 000 23 13 11 -7.7 -9.4 29.04 8 11 85 59 000 93 58 50 -7 -7 -7 000 24 13 12 -6.8 -8.6 29.03 8 11 81 56 000 90 72 48 -7 -6 -7 000 25 13 13 -6.0 -8.2 29.02 8 10 80 54 000 87 70 48 -7 -6 -6 000 26 13 14 -5.6 -7.8 29.02 7 8 80 55 000 87 68 48 -7 -6 -6 000 27 13 15 -5.4 -7.2 29.01 7 8 79 53 000 89 67 47 -7 -6 -6 000 28 13 16 -5.1 -7.1 28.99 7 7 73 47 000 88 66 46 -6 -6 -6 000 29 13 17 -4.8 -6.9 28.98 7 8 68 43 000 88 64 47 -6 -6 -6 000 30 13 18 -4.7 -6.4 28.98 7 9 73 47 000 90 61 48 -6 -6 -6 000 31 13 19 -4.9 -6.3 28.97 7 10 79 53 000 92 59 48 -6 -6 -6 000 32 13 20 -5.2 -6.4 28.97 8 10 82 57 000 95 57 49 -6 -6 -6 000 33 13 21 -5.8 -6.7 28.97 7 12 86 60 000 99 57 51 -6 -6 -6 000 34 13 22 -6.5 -6.9 28.96 7 13 89 64 000 104 58 58 -6 -6 -6 000 35 13 23 -7.1 -7.3 28.95 7 15 91 66 000 106 58 73 -6 -6 -6 000 36 14 00 -7.2 -7.4 28.95 8 15 89 64 -001 107 58 95 -6 -6 -6 000 37 14 01 -6.9 -7.2 28.95 10 15 86 61 000 105 77104 -6 -6 -6 002 38 14 02 -6.2 -7.1 28.94 11 17 90 64 000 98 96106 -6 -6 -6 016 39 14 03 -6.1 -7.2 28.93 13 19 88 63 000 97101101 -7 -6 -6 017 40 14 04 -6.1 -7.2 28.93 15 20 85 59 000 96104100 -7 -6 -6 017 41 14 05 -6.1 -7.2 28.93 15 20 81 55 -001 96105105 -7 -6 -6 016 42 14 06 -6.4 -7.6 28.93 16 21 78 52 000 96104106 -7 -6 -6 024 43 14 07 -6.6 -7.8 28.93 16 22 76 50 -001 96103108 -7 -6 -6 019 44 14 08 -6.7 -7.9 28.94 16 23 77 52 -001 96101105 -7 -7 -6 011 45 14 09 -6.4 -7.5 28.94 16 22 79 54 000 96 96106 -7 -6 -6 011 46 14 10 -5.9 -7.0 28.94 15 21 80 54 000 96 92104 -7 -6 -6 011 47 14 11 -5.5 -6.7 28.94 15 19 78 52 000 95 96101 -7 -6 -6 008 48 14 12 -5.1 -6.2 28.94 14 18 75 50 000 96 99102 -7 -6 -6 008 49 14 13 -4.7 -5.7 28.95 14 17 73 48 -001 96 97106 -6 -6 -6 006 50 14 14 -4.4 -5.4 28.94 14 17 74 49 000 95 93104 -6 -6 -6 006 51 14 15 -4.0 -5.2 28.94 14 16 75 49 000 94 93100 -5 -6 -6 007 52 14 16 -3.8 -5.2 28.94 13 16 75 50 000 92 96 98 -5 -6 -6 006 53 14 17 -3.6 -5.0 28.95 12 16 75 49 000 91105 96 -5 -6 -6 002 54 14 18 -3.2 -4.6 28.95 12 15 75 50 000 91106 97 -4 -6 -6 001 55 14 19 -3.0 -4.4 28.95 12 15 79 53 000 90105 96 -4 -5 -6 001 56 14 20 -3.5 -4.7 28.95 13 15 83 57 000 93101100 -4 -5 -6 001 57 14 21 -4.1 -5.2 28.96 13 17 83 57 000 94102 97 -4 -5 -6 001 58 14 22 -4.3 -5.4 28.97 12 16 79 53 000 95102 96 -4 -5 -6 001 59 14 23 -4.7 -5.6 28.97 12 16 75 50 000 97104 95 -5 -5 -6 003 60 15 00 -5.2 -5.9 28.97 10 15 73 47 -001 99 97 95 -5 -5 -6 005 61 15 01 -5.6 -6.2 28.98 9 14 71 46 -001 101 96 95 -5 -6 -7 005 62 15 02 -6.0 -6.7 28.98 9 14 79 53 000 101 97 94 -5 -6 -7 003 63 15 03 -7.4 -7.6 28.98 10 13 82 56 000 107103 96 -6 -7 -7 002 64 15 04 -7.5 -8.1 28.99 11 16 79 53 000 103107 97 -6 -7 -8 001 65 15 05 -5.7 -6.8 28.99 11 15 78 53 000 96107 96 -6 -7 -8 001 66 15 06 -5.4 -6.4 28.99 10 15 67 42 001 97107 92 -6 -7 -9 001 67 15 07 -5.3 -6.5 29.00 10 13 73 47 000 95105 93 -6 -7 -9 001 68 15 08 -5.1 -6.4 29.00 10 13 78 52 000 93 99 95 -6 -7 -8 000 69 15 09 -4.9 -6.4 29.01 11 13 81 55 000 92 95 92 -5 -7 -8 000 70 15 10 -4.6 -6.1 29.01 10 12 80 55 000 91 94 91 -5 -6 -8 000 71 15 11 -4.5 -6.0 29.02 10 12 81 55 001 92 93 97 -5 -6 -7 000 72 15 12 -4.0 -5.7 29.02 10 12 77 51 001 89 90101 -5 -6 -7 000 73 15 13 -3.4 -5.3 29.03 9 11 64 39 000 87 93104 -5 -6 -7 000 74 15 14 -3.0 -5.0 29.04 9 10 56 30 000 86101103 -4 -6 -7 000 75 15 15 -2.8 -4.9 29.04 8 10 60 34 000 86101100 -4 -5 -6 000 76 15 16 -2.7 -4.8 29.05 8 9 72 46 000 85 99 99 -4 -5 -6 000 77 15 17 -2.6 -4.5 29.05 8 9 79 53 000 86 98100 -4 -5 -6 001 78 15 18 -2.4 -4.1 29.06 9 10 81 56 000 88 99103 -4 -5 -5 003 79 15 19 -2.3 -3.8 29.06 9 11 82 56 000 90100 96 -3 -4 -5 005 80 15 20 -2.4 -3.7 29.06 9 12 79 54 -002 91102 95 -3 -4 -5 004 81 15 21 -2.4 -3.6 29.07 9 12 77 52 -001 92103109 -3 -4 -5 005 82 15 22 -2.7 -3.8 29.08 9 12 73 47 -002 92103105 -3 -4 -5 005 83 15 23 -3.7 -4.6 29.10 8 12 75 50 000 95 97107 -3 -4 -5 004 84 16 00 -4.9 -5.9 29.10 8 13 77 52 000 94 90 96 -3 -4 -5 002 85 16 01 -4.8 -5.6 29.11 8 13 83 57 000 97 88 95 -3 -4 -5 000 86 16 02 -5.3 -5.5 29.12 8 12 85 59 003 104 97100 -3 -4 -5 000 87 16 03 -6.0 -6.3 29.12 7 11 87 61 001 105 95 97 -4 -4 -5 002 88 16 04 -7.5 -7.6 29.13 6 9 87 62 000 107 96 98 -4 -4 -5 000 89 16 05 -8.3 -8.5 29.14 5 9 88 62 -001 107 96101 -4 -4 -5 002 90 16 06 -7.4 -8.2 29.15 5 9 91 65 000 101 98 99 -4 -5 -6 006 91 16 07 -6.3 -7.4 29.16 6 10 83 57 000 97 93 99 -4 -5 -6 005 92 16 08 -5.8 -6.9 29.16 6 8 78 52 000 96 80100 -4 -5 -6 001 93 16 09 -5.2 -6.2 29.17 5 6 90 65 000 96 83100 -4 -5 -6 003 94 16 10 -5.0 -6.0 29.18 5 6 106 80 000 96 85 95 -4 -4 -5 001 95 16 11 -5.1 -5.6 29.18 6 7 101 75 -001 100 82 86 -4 -4 -5 000 96 16 12 -4.1 -4.7 29.18 8 12 88 62 -001 98 92 87 -4 -4 -5 000 97 16 13 -2.9 -4.5 29.18 10 14 81 55 000 90 94 93 -4 -4 -4 000 98 16 14 -2.6 -3.7 29.17 10 12 79 53 -001 93 93 92 -4 -4 -4 000 99 16 15 -2.2 -2.9 29.16 9 11 77 51 000 96 96 91 -3 -4 -4 000 100 16 16 -1.6 -2.3 29.16 9 10 68 42 000 95104 94 -3 -4 -4 000 101 16 17 -1.8 -2.3 29.16 9 10 65 39 000 98104 96 -3 -4 -4 000 102 16 18 -1.9 -2.0 29.16 9 11 63 38 000 101104102 -3 -4 -4 001 103 16 19 -2.0 -2.1 29.15 9 11 67 42 000 101 95 96 -3 -3 -4 000 104 16 20 -2.4 -3.2 29.15 6 10 64 38 000 95 77 91 -3 -3 -4 000 105 16 21 -4.1 -4.3 29.14 5 10 84 58 000 103 77 86 -2 -3 -4 000 106 16 22 -5.8 -6.0 29.14 4 9 92 67 000 105 78 85 -2 -3 -4 000 107 16 23 -8.9 -9.0 29.14 3 7 132 106 000 109 80 88 -2 -3 -4 000 108 17 00 -10.9 -11.1 29.13 3 5 142 117 000 111 90 77 -2 -4 -5 000 109 17 01 -12.4 -12.7 29.13 3 8 141 115 000 112 96 76 -3 -4 -5 000 110 17 02 -13.5 -13.9 29.11 4 8 144 118 001 114 97 72 -3 -4 -5 000 111 17 03 -14.4 -14.7 29.10 4 11 136 110 001 114 88 73 -3 -4 -5 000 112 17 04 -15.0 -15.3 29.09 4 13 120 95 000 115 80 75 -4 -4 -5 000 113 17 05 -15.1 -15.4 29.09 5 18 111 85 000 115 79 88 -5 -4 -5 000 114 17 06 -14.0 -14.3 29.08 5 19 94 68 000 114 82 89 -5 -5 -5 000 115 17 07 -13.0 -13.3 29.08 5 17 101 76 000 113 70 83 -5 -5 -5 000 116 17 08 -11.4 -12.6 29.08 5 18 111 86 000 102 60 84 -5 -6 -5 000 117 17 09 -9.4 -11.4 29.07 7 22 106 81 000 92 65 71 -5 -6 -5 000 118 17 10 -7.1 -9.7 29.07 10 25 98 73 000 85 67 71 -6 -5 -5 000 119 17 11 -5.4 -7.9 29.06 12 21 86 61 000 84 74 70 -5 -5 -5 000 120 17 12 -4.1 -7.0 29.04 11 21 90 65 002 79 65 75 -4 -5 -6 000 * 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.