Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-01-28/12 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 28 12 -8.0 -9.8 29.24 8 10 90 65 000 89 91 60 -9 -9 -9 000 1 28 13 -7.2 -9.1 29.23 8 13 86 61 000 92 94 63 -8 -9 -8 000 2 28 14 -6.8 -8.6 29.23 8 12 82 57 000 91 94 60 -8 -8 -8 000 3 28 15 -6.4 -8.3 29.22 7 10 83 57 000 90 94 59 -8 -8 -8 000 4 28 16 -6.2 -8.0 29.22 6 9 91 66 000 90 93 56 -7 -8 -7 000 5 28 17 -6.1 -7.9 29.22 5 7 102 76 001 91 91 53 -7 -7 -7 000 6 28 18 -6.2 -7.8 29.21 3 5 114 89 001 92 91 50 -7 -7 -7 000 7 28 19 -7.0 -8.4 29.17 3 4 137 112 000 94 89 47 -7 -7 -7 000 8 28 20 -7.8 -8.9 29.19 3 3 165 140 001 97 83 45 -7 -6 -7 000 9 28 21 -9.3 -9.9 29.15 4 4 202 176 000 105 77 44 -6 -6 -6 000 10 28 22 -10.9 -11.4 29.15 6 7 223 197 000 110 73 43 -6 -6 -6 000 11 28 23 -12.6 -13.0 29.14 5 11 230 204 001 112 70 41 -6 -6 -6 000 12 29 00 -14.5 -14.9 29.12 5 13 243 217 000 114 61 36 -6 -6 -6 000 13 29 01 -15.9 -16.4 29.11 6 13 254 229 001 116 51 30 -6 -6 -6 000 14 29 02 -17.0 -17.4 29.10 6 13 256 230 001 117 58 27 -5 -6 -6 000 15 29 03 -18.2 -18.6 29.08 5 12 256 231 001 119 91 26 -6 -7 -5 000 16 29 04 -18.3 -18.6 29.07 4 11 261 236 002 119 90 22 -6 -7 -6 000 17 29 05 -17.1 -17.3 29.07 4 11 271 246 002 118 53 21 -6 -6 -5 000 18 29 06 -16.5 -16.7 29.06 5 11 257 232 002 117 40 20 -7 -5 -4 000 19 29 07 -18.0 -18.3 29.04 4 8 240 215 002 119 29 20 -7 -6 -5 000 20 29 08 -17.4 -17.6 29.02 3 8 242 216 000 118 34 20 -7 -6 -5 000 21 29 09 -15.9 -16.6 29.01 2 4 264 239 000 111 32 19 -7 -6 -5 000 22 29 10 -14.1 -15.4 29.00 2 4 277 251 000 103 32 17 -7 -6 -5 000 23 29 11 -11.9 -13.5 28.99 2 5 268 243 001 98 33 16 -6 -6 -5 000 24 29 12 -9.5 -12.3 28.98 3 10 227 202 001 86 33 16 -6 -6 -5 000 25 29 13 -8.1 -11.8 28.98 4 9 214 188 002 78 32 16 -6 -5 -4 000 26 29 14 -7.1 -10.3 28.97 3 11 219 193 002 81 32 16 -5 -5 -4 000 27 29 15 -5.9 -8.6 28.95 3 11 223 197 002 83 33 15 -5 -5 -4 000 28 29 16 -4.9 -6.9 28.94 3 11 238 212 001 87 43 16 -4 -5 -4 000 29 29 17 -4.6 -5.9 28.94 3 13 262 237 000 91 64 16 -4 -5 -4 000 30 29 18 -4.8 -6.0 28.95 3 12 257 231 000 93 74 16 -4 -5 -4 000 31 29 19 -5.5 -6.3 28.96 0 6 261 235 000 99 90 16 -4 -5 -4 000 32 29 20 -8.6 -9.0 28.97 5 6 84 58 000 108 98 17 -5 -5 -5 000 33 29 21 -10.9 -12.4 28.98 10 15 78 53 000 97 99 18 -6 -5 -6 000 34 29 22 -12.1 -12.4 28.98 10 18 84 59 000 112 99 20 -8 -6 -6 000 35 29 23 -12.9 -13.3 28.98 11 21 80 54 001 113 84 24 -9 -7 -6 000 36 30 00 -13.6 -13.9 28.99 12 22 77 51 001 114 59 28 -10 -8 -7 000 37 30 01 -12.3 -12.6 29.00 14 20 72 47 000 112 61 34 -13 -9 -8 000 38 30 02 -11.3 -11.6 29.00 14 22 71 46 000 111 74 39 -12-10 -9 000 39 30 03 -9.8 -10.6 29.00 15 23 66 40 000 103112 44 -10-12-11 000 40 30 04 -9.5 -10.8 29.00 13 22 79 53 000 98112 45 -10-11-13 000 41 30 05 -10.6 -11.7 29.00 17 22 82 57 -001 102114 39 -12-13-11 000 42 30 06 -11.2 -11.6 28.99 19 29 70 45 002 110113 46 -12-13-11 000 43 30 07 -9.0 -10.6 28.97 21 29 75 49 000 96112 43 -10-11-13 000 44 30 08 -9.1 -10.9 28.96 22 30 79 54 001 93111 39 -10-11-12 000 45 30 09 -8.5 -9.7 28.96 23 30 77 52 000 98111 42 -10-11-11 000 46 30 10 -8.2 -9.3 28.95 23 30 77 52 000 99110 61 -9-10-11 000 47 30 11 -7.6 -8.8 28.94 24 31 81 55 000 97110111 -9-10-10 000 48 30 12 -7.3 -8.6 28.94 24 31 83 57 000 96110103 -8-10-10 000 49 30 13 -6.5 -8.0 28.92 25 32 84 59 -001 93109110 -8 -9 -9 000 50 30 14 -6.0 -7.5 28.92 25 33 80 54 000 93108110 -7 -8 -9 003 51 30 15 -5.5 -7.1 28.91 26 34 80 54 000 92107109 -7 -8 -9 006 52 30 16 -5.2 -6.9 28.90 26 35 80 54 000 90106105 -6 -8 -9 002 53 30 17 -5.2 -6.8 28.89 27 36 81 56 000 91104108 -6 -7 -8 006 54 30 18 -4.9 -6.4 28.89 27 36 81 55 000 92104109 -6 -7 -8 014 55 30 19 -4.9 -6.3 28.89 27 36 81 55 -001 93104109 -6 -7 -8 015 56 30 20 -5.0 -6.5 28.88 27 37 80 54 -003 92102108 -6 -7 -8 025 57 30 21 -5.1 -6.6 28.88 26 37 80 54 -003 92101105 -6 -7 -8 033 58 30 22 -4.9 -6.2 28.89 25 37 78 53 -001 93103106 -5 -7 -7 025 59 30 23 -4.8 -6.3 28.89 25 37 80 54 000 92101108 -5 -6 -7 019 60 31 00 -4.8 -6.3 28.89 25 38 80 55 001 92 99109 -5 -6 -7 015 61 31 01 -5.0 -6.3 28.89 24 35 80 55 004 94102109 -6 -7 -7 024 62 31 02 -5.8 -7.2 28.90 24 35 81 55 003 94103103 -6 -7 -8 019 63 31 03 -6.4 -7.9 28.90 24 35 82 57 003 94102104 -7 -7 -8 013 64 31 04 -6.6 -8.0 28.90 24 35 81 56 002 94103102 -7 -8 -8 016 65 31 05 -6.3 -7.8 28.90 24 36 81 55 001 93100104 -7 -7 -8 019 66 31 06 -5.8 -7.3 28.90 25 36 82 56 001 93 99105 -6 -7 -8 016 67 31 07 -5.7 -7.5 28.89 24 37 83 57 004 90 95 96 -6 -7 -8 008 68 31 08 -5.5 -7.5 28.89 21 33 83 57 002 88 96 99 -6 -6 -7 002 69 31 09 -5.1 -7.0 28.88 22 34 82 56 001 88 96 98 -5 -7 -7 000 70 31 10 -4.6 -6.8 28.88 22 34 84 58 001 86 91 92 -5 -6 -7 000 71 31 11 -4.2 -6.6 28.87 21 33 81 55 000 84 87 94 -5 -6 -7 000 72 31 12 -3.9 -6.3 28.87 21 32 80 55 000 83 84 90 -4 -6 -7 000 73 31 13 -3.6 -5.9 28.87 21 31 79 53 002 84 88 91 -4 -6 -7 000 74 31 14 -3.3 -5.8 28.87 20 29 77 51 002 81 88 93 -4 -5 -7 000 75 31 15 -2.9 -5.5 28.86 18 27 79 53 000 81 88 99 -4 -5 -6 000 76 31 16 -3.1 -5.6 28.85 17 26 82 56 000 82 80102 -4 -5 -6 000 77 31 17 -3.0 -5.5 28.84 16 24 81 56 -002 82 82 92 -4 -5 -6 000 78 31 18 -3.5 -5.7 28.83 13 22 84 58 000 84 74 87 -4 -5 -6 000 79 31 19 -4.0 -6.1 28.82 12 23 84 58 -001 86 74 89 -3 -5 -6 000 80 31 20 -5.1 -7.0 28.81 9 21 83 58 000 87 64102 -3 -4 -5 000 81 31 21 -4.8 -6.3 28.80 7 18 82 57 001 91 62 98 -3 -4 -5 000 82 31 22 -6.2 -7.1 28.80 6 15 105 79 001 99 65 97 -3 -4 -5 000 83 31 23 -8.2 -8.6 28.80 7 9 120 94 000 107 65 86 -4 -4 -5 000 84 01 00 -11.6 -11.9 28.80 5 10 125 99 001 111 71 84 -4 -5 -6 000 85 01 01 -13.5 -13.7 28.78 4 9 137 112 000 114 79 84 -4 -5 -6 000 86 01 02 -11.9 -12.1 28.77 3 8 151 126 000 112 79 85 -4 -5 -6 000 87 01 03 -10.2 -11.2 28.76 3 6 165 139 001 102 77 84 -4 -5 -6 000 88 01 04 -9.0 -10.3 28.74 3 3 190 164 000 98 67 79 -4 -4 -5 000 89 01 05 -10.5 -11.3 28.73 5 6 157 132 002 105 82 76 -4 -5 -6 000 90 01 06 -8.7 -9.7 28.71 4 5 182 157 000 101 85 77 -4 -5 -6 000 91 01 07 -8.1 -9.1 28.70 4 7 139 114 -001 100 69 77 -5 -5 -6 000 92 01 08 -7.4 -8.9 28.69 2 6 113 88 000 94 62 78 -5 -5 -6 000 93 01 09 -7.5 -9.5 28.68 2 5 79 54 000 89 63 79 -6 -5 -6 000 94 01 10 -7.9 -9.2 28.68 2 5 87 61 000 96 63 78 -6 -6 -6 000 95 01 11 -7.5 -9.0 28.67 1 4 52 27 001 95 62 77 -6 -6 -6 000 96 01 12 -6.8 -9.8 28.65 3 4 5 339 000 83 63 78 -6 -6 -6 000 97 01 13 -6.5 -9.8 28.64 3 4 340 315 000 80 63 77 -6 -5 -6 000 98 01 14 -6.0 -9.5 28.62 3 4 325 299 000 78 66 76 -5 -5 -6 000 99 01 15 -5.4 -8.8 28.61 2 3 318 292 000 79 71 75 -5 -5 -6 000 100 01 16 -4.9 -7.7 28.60 1 4 261 236 000 83 71 75 -5 -5 -6 000 101 01 17 -4.9 -7.1 28.59 2 5 222 197 000 85 67 75 -5 -5 -6 000 102 01 18 -5.3 -7.2 28.59 2 5 219 193 000 88 66 75 -5 -5 -6 000 103 01 19 -5.8 -7.6 28.58 2 5 226 201 000 91 69 76 -4 -5 -6 000 104 01 20 -6.6 -7.9 28.58 2 5 236 211 000 95 71 77 -4 -5 -6 000 105 01 21 -7.5 -8.4 28.58 2 5 247 222 000 99 68 79 -4 -5 -6 000 106 01 22 -8.5 -8.6 28.58 2 4 242 216 000 107 63 81 -4 -5 -6 000 107 01 23 -10.8 -10.9 28.58 2 4 208 183 000 110 57 84 -4 -5 -6 000 108 02 00 -15.9 -16.1 28.58 3 4 169 143 000 116 54 88 -4 -5 -6 000 109 02 01 -18.2 -18.5 28.59 2 6 147 122 000 119 54 89 -5 -5 -6 000 110 02 02 -19.0 -19.7 28.59 3 11 128 102 000 120 55 89 -6 -5 -6 000 111 02 03 -18.5 -18.8 28.59 5 11 109 84 000 119 58 88 -6 -5 -6 000 112 02 04 -17.5 -17.8 28.60 7 8 92 66 -001 118 57 89 -5 -5 -6 000 113 02 05 -17.1 -17.4 28.61 7 10 82 57 000 118 58 90 -6 -5 -6 000 114 02 06 -16.6 -16.9 28.62 7 10 82 57 000 117 63 88 -7 -6 -7 000 115 02 07 -15.3 -15.6 28.63 8 13 80 55 000 116 71 85 -7 -6 -7 000 116 02 08 -14.4 -15.5 28.64 7 13 82 56 000 106 66 84 -8 -7 -7 000 117 02 09 -12.6 -15.0 28.65 8 12 71 46 000 91 57 85 -8 -7 -7 000 118 02 10 -11.4 -14.5 28.66 8 14 74 48 000 84 53 85 -7 -6 -7 000 119 02 11 -9.9 -13.6 28.68 9 14 76 51 000 78 51 86 -7 -6 -7 000 120 02 12 -8.8 -12.5 28.69 8 13 72 47 -001 77 49 85 -7 -6 -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.