Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-01-31/12 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 31 12 -5.1 -6.4 28.79 23 25 83 57 000 90 96 95 -6 -7 -8 000 1 31 13 -4.9 -6.6 28.77 25 33 79 54 003 90104101 -6 -7 -8 002 2 31 14 -4.5 -6.2 28.78 24 33 79 53 001 90103103 -6 -7 -8 001 3 31 15 -4.1 -6.0 28.78 23 31 78 52 001 87100105 -5 -7 -8 000 4 31 16 -4.0 -6.1 28.76 22 30 77 51 001 86 98104 -5 -6 -8 000 5 31 17 -3.5 -5.5 28.76 21 28 77 51 002 86 99105 -5 -6 -7 000 6 31 18 -3.3 -5.3 28.76 20 27 78 52 001 86 98110 -4 -6 -7 001 7 31 19 -3.3 -5.3 28.75 20 27 77 52 001 86 98110 -4 -6 -7 001 8 31 20 -3.5 -5.2 28.73 18 25 82 56 000 88 97110 -4 -6 -7 002 9 31 21 -3.7 -5.3 28.72 16 24 80 55 002 89 98105 -4 -5 -7 002 10 31 22 -4.6 -6.0 28.75 13 23 78 52 000 92 95108 -4 -5 -7 001 11 31 23 -4.9 -6.6 28.73 12 22 77 52 000 89 93106 -4 -5 -6 000 12 01 00 -6.6 -7.6 28.72 10 19 83 58 000 97 96108 -4 -6 -6 000 13 01 01 -8.3 -8.5 28.71 10 20 90 64 000 107 98106 -5 -5 -6 000 14 01 02 -9.9 -10.1 28.70 12 23 91 66 000 109 88101 -4 -5 -6 000 15 01 03 -10.4 -11.1 28.71 12 20 92 66 000 105 87 96 -4 -5 -7 000 16 01 04 -11.3 -12.5 28.70 12 21 94 68 000 100 83 90 -5 -6 -7 000 17 01 05 -12.0 -13.1 28.69 11 22 100 74 001 103 81 97 -5 -6 -7 000 18 01 06 -12.5 -13.8 28.70 9 21 94 69 000 103 83108 -6 -6 -7 000 19 01 07 -12.0 -13.6 28.68 9 19 94 68 000 97 91105 -6 -6 -7 000 20 01 08 -11.3 -13.2 28.68 7 16 94 68 000 94 91 99 -6 -6 -7 000 21 01 09 -10.5 -12.5 28.67 5 17 96 70 000 93 87 96 -6 -6 -7 000 22 01 10 -8.6 -10.7 28.66 5 12 81 55 000 90 73 92 -7 -6 -6 000 23 01 11 -7.1 -10.2 28.66 6 12 71 46 000 81 55 89 -7 -6 -6 000 24 01 12 -7.2 -10.4 28.64 5 11 85 59 001 80 51 93 -7 -6 -6 000 25 01 13 -6.6 -10.4 28.64 5 13 92 66 001 76 51 92 -7 -6 -6 000 26 01 14 -6.3 -10.3 28.62 5 11 94 68 001 73 49 81 -6 -6 -6 000 27 01 15 -6.0 -10.1 28.62 5 9 104 78 001 72 45 83 -6 -5 -6 000 28 01 16 -5.8 -9.8 28.62 4 8 131 105 001 73 49 76 -6 -5 -6 000 29 01 17 -5.8 -8.9 28.61 4 5 169 144 000 78 52 69 -5 -5 -6 000 30 01 18 -6.1 -8.4 28.60 5 7 189 164 000 85 53 63 -5 -5 -7 000 31 01 19 -7.0 -8.8 28.60 5 8 196 170 000 89 52 68 -4 -5 -7 000 32 01 20 -8.3 -10.4 28.59 5 11 203 178 000 87 50 67 -4 -5 -6 000 33 01 21 -9.8 -11.3 28.59 5 13 210 185 000 96 50 66 -4 -5 -6 000 34 01 22 -11.2 -11.5 28.58 5 11 210 185 001 110 49 61 -4 -5 -6 000 35 01 23 -13.0 -13.4 28.58 4 8 206 180 000 113 49 53 -4 -4 -6 000 36 02 00 -16.1 -16.3 28.58 3 4 198 172 000 116 50 49 -4 -4 -6 000 37 02 01 -17.3 -17.9 28.58 3 6 188 163 000 118 55 52 -5 -4 -5 000 38 02 02 -17.4 -18.1 28.58 4 8 159 133 000 117 58 54 -5 -5 -5 000 39 02 03 -18.6 -19.1 28.58 5 9 128 102 000 119 57 55 -6 -5 -6 000 40 02 04 -19.3 -19.6 28.59 5 9 120 94 000 120 57 55 -6 -5 -6 000 41 02 05 -18.9 -19.2 28.59 8 9 88 62 000 120 57 59 -5 -5 -6 000 42 02 06 -17.8 -18.0 28.60 8 12 75 50 000 119 62 63 -6 -5 -6 000 43 02 07 -15.8 -16.1 28.61 9 11 66 40 000 116 66 69 -8 -6 -6 000 44 02 08 -14.0 -14.2 28.62 8 13 63 38 000 114 68 74 -9 -7 -7 000 45 02 09 -12.4 -12.6 28.63 9 13 61 35 000 113 77 76 -9 -7 -7 000 46 02 10 -11.8 -12.3 28.64 8 14 60 35 000 108 49 75 -9 -8 -8 000 47 02 11 -11.0 -12.6 28.66 7 16 62 37 000 97 49 75 -9 -8 -8 000 48 02 12 -10.1 -13.0 28.67 7 15 68 43 000 85 57 74 -9 -8 -8 000 49 02 13 -9.7 -12.9 28.67 8 15 74 48 000 82 72 76 -10 -8 -7 000 50 02 14 -9.8 -12.3 28.68 8 10 75 49 000 88 78 78 -11 -8 -7 000 51 02 15 -9.7 -11.8 28.69 7 8 74 48 000 92 77 78 -11 -7 -7 000 52 02 16 -9.4 -10.9 28.70 6 7 65 39 000 96 83 75 -10 -7 -7 000 53 02 17 -8.1 -8.2 28.70 5 7 62 36 000 108 86 73 -9 -7 -7 000 54 02 18 -7.2 -7.2 28.70 6 7 65 39 000 107 90 74 -8 -7 -7 000 55 02 19 -6.8 -6.8 28.70 5 6 58 32 000 107 85 76 -8 -7 -6 000 56 02 20 -6.6 -7.0 28.70 3 4 62 37 000 104 82 76 -8 -6 -6 000 57 02 21 -7.0 -7.1 28.70 2 3 77 51 000 107 86 75 -8 -7 -6 000 58 02 22 -7.3 -7.3 28.70 1 1 100 74 000 107 71 71 -8 -5 -6 000 59 02 23 -7.7 -7.7 28.70 1 1 135 110 001 107 69 65 -8 -5 -6 000 60 03 00 -8.2 -8.3 28.70 1 1 211 185 000 108 65 57 -9 -5 -5 000 61 03 01 -8.8 -8.9 28.70 2 2 225 200 000 108 62 56 -10 -5 -6 000 62 03 02 -9.4 -9.6 28.70 3 3 225 200 000 109 60 55 -10 -5 -6 000 63 03 03 -10.0 -10.1 28.70 3 3 212 187 001 110 60 54 -11 -5 -6 000 64 03 04 -10.8 -10.9 28.71 3 3 197 171 000 111 58 55 -10 -5 -6 000 65 03 05 -11.5 -11.6 28.71 3 3 225 200 001 111 54 54 -6 -5 -6 000 66 03 06 -12.1 -12.2 28.71 3 3 222 197 000 112 66 55 -8 -5 -6 000 67 03 07 -12.4 -12.5 28.72 1 1 206 180 000 112 77 63 -9 -5 -6 000 68 03 08 -12.5 -12.5 28.73 0 2 173 148 000 113 79 74 -8 -6 -6 000 69 03 09 -12.1 -12.1 28.74 0 4 47 22 000 112 77 74 -7 -6 -6 000 70 03 10 -11.2 -11.2 28.75 1 3 29 3 000 111 77 82 -8 -5 -5 000 71 03 11 -10.0 -10.0 28.76 2 3 16 351 000 110 79 94 -8 -5 -6 000 72 03 12 -8.8 -9.2 28.78 3 3 16 350 000 106 83101 -9 -6 -6 003 73 03 13 -7.5 -8.4 28.81 4 5 51 25 000 100 84100 -9 -6 -7 005 74 03 14 -6.3 -7.4 28.83 8 9 67 41 000 96102 96 -8 -8 -7 006 75 03 15 -5.0 -6.4 28.85 12 14 73 47 000 92107 99 -6 -8 -9 011 76 03 16 -4.8 -6.2 28.87 14 16 79 54 -003 92107101 -6 -7 -8 010 77 03 17 -5.2 -6.5 28.88 16 19 83 58 -002 94104102 -6 -7 -8 010 78 03 18 -5.2 -6.6 28.89 15 19 82 56 000 93103104 -6 -7 -7 011 79 03 19 -5.3 -6.6 28.90 14 18 81 56 000 93102 97 -6 -7 -7 008 80 03 20 -5.8 -7.0 28.92 12 18 82 56 000 94 99 90 -6 -7 -7 002 81 03 21 -6.5 -7.5 28.93 12 20 87 62 000 98102 98 -6 -6 -6 002 82 03 22 -6.7 -7.5 28.93 11 20 85 60 000 100107101 -6 -7 -6 001 83 03 23 -7.3 -7.5 28.95 10 20 89 64 000 107103100 -5 -6 -6 001 84 04 00 -5.8 -6.2 28.96 11 18 81 56 -001 103103 94 -6 -6 -6 004 85 04 01 -5.1 -5.8 28.96 10 17 83 58 -001 99107 89 -5 -7 -6 002 86 04 02 -4.9 -5.7 28.96 9 16 80 54 000 98107 92 -5 -7 -8 000 87 04 03 -5.0 -6.0 28.96 9 14 87 62 000 97107 96 -6 -7 -8 000 88 04 04 -5.3 -6.2 28.97 9 15 96 70 000 97106 97 -5 -6 -8 000 89 04 05 -5.8 -7.0 28.98 9 16 100 74 000 95 98 86 -5 -6 -7 000 90 04 06 -6.2 -8.2 28.98 9 16 98 72 000 89 92 87 -5 -6 -7 000 91 04 07 -6.4 -8.2 28.98 12 16 90 64 000 91 94 99 -6 -6 -7 000 92 04 08 -6.6 -7.9 28.99 12 16 87 61 000 95103106 -6 -6 -7 001 93 04 09 -7.3 -8.5 28.99 12 17 85 60 000 97101104 -7 -6 -7 002 94 04 10 -6.7 -8.3 29.00 13 18 82 57 000 93100110 -7 -6 -7 001 95 04 11 -6.9 -8.4 29.00 13 20 79 53 000 93 96103 -7 -6 -6 001 96 04 12 -6.6 -8.0 29.01 13 19 81 55 -001 94 96101 -6 -5 -6 000 97 04 13 -6.1 -7.0 29.01 13 18 79 54 000 98 99 95 -7 -5 -6 000 98 04 14 -4.4 -5.2 29.01 13 16 74 49 000 97107 88 -6 -7 -6 001 99 04 15 -3.5 -4.7 29.00 12 14 67 42 001 93106 92 -5 -6 -7 000 100 04 16 -3.3 -4.7 29.01 11 12 71 46 000 91106 94 -4 -6 -7 001 101 04 17 -3.2 -4.8 29.01 10 11 74 48 000 90106 90 -4 -6 -7 001 102 04 18 -3.1 -4.8 29.01 10 11 81 55 -001 89101 95 -4 -6 -7 001 103 04 19 -3.9 -5.2 29.01 10 13 84 59 000 92105 86 -5 -6 -7 000 104 04 20 -4.0 -5.2 29.01 10 13 83 57 000 93106 84 -5 -6 -7 000 105 04 21 -4.3 -5.5 29.02 10 13 79 53 000 94107 82 -5 -7 -8 000 106 04 22 -4.6 -5.5 29.02 9 12 85 60 000 96107 95 -5 -7 -8 000 107 04 23 -5.0 -6.0 29.02 9 13 82 56 000 96107100 -6 -7 -7 000 108 05 00 -6.0 -6.7 29.02 8 12 88 63 000 101104 93 -6 -6 -8 001 109 05 01 -6.4 -7.2 29.02 9 13 97 71 -001 100106 95 -6 -6 -7 000 110 05 02 -6.1 -6.6 29.02 9 13 77 52 000 102107 92 -6 -7 -7 001 111 05 03 -6.6 -6.9 29.02 9 11 80 55 000 105108 92 -7 -8 -8 000 112 05 04 -7.1 -7.2 29.02 9 13 78 53 001 107106 94 -8 -8 -8 000 113 05 05 -8.0 -8.1 29.02 10 11 83 58 000 108109 96 -8 -9 -8 000 114 05 06 -8.6 -9.8 29.02 9 13 92 66 000 98109 96 -7 -8-10 000 115 05 07 -10.2 -12.3 29.03 13 19 78 52 000 92101109 -8 -8 -9 001 116 05 08 -10.2 -12.5 29.03 13 22 77 52 000 90 96107 -9 -7 -9 000 117 05 09 -9.5 -11.9 29.03 13 22 82 57 -001 88 91110 -9 -8 -8 001 118 05 10 -8.9 -11.3 29.02 14 22 82 56 000 87 86109 -9 -7 -8 002 119 05 11 -8.5 -11.2 29.02 13 22 83 57 000 85 79103 -8 -7 -7 002 120 05 12 -7.8 -10.5 29.02 13 20 85 60 000 84 81102 -8 -7 -7 000 * 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.