Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-04-30/12 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 30 12 -32.3 -35.8 29.12 3 5 247 222 000 100 71 19 -22-18-16 000 1 30 13 -30.6 -30.6 29.12 2 4 192 167 000 133 69 19 -22-18-16 000 2 30 14 -32.6 -32.6 29.14 1 1 50 24 000 136 67 18 -21-18-16 000 3 30 15 -34.6 -34.7 29.14 2 2 22 356 002 138 51 19 -22-18-16 000 4 30 16 -36.2 -37.6 29.16 4 6 51 25 001 124 44 20 -23-19-18 000 5 30 17 -37.6 -39.2 29.18 4 6 28 2 001 124 45 21 -22-20-19 000 6 30 18 -39.5 -42.1 29.16 1 2 95 70 002 113 35 21 -22-20-20 000 7 30 19 -40.2 -42.0 29.17 3 4 110 85 000 124 40 21 -22-21-19 000 8 30 20 -39.1 -40.7 29.17 2 5 94 68 000 124 37 21 -22-20-19 000 9 30 21 -39.0 -40.7 29.19 3 6 70 45 000 123 40 22 -22-21-19 000 10 30 22 -40.0 -42.1 29.18 5 9 60 34 000 124 43 21 -22-21-20 000 11 30 23 -39.2 -41.3 29.21 5 10 69 44 -001 124 45 22 -24-22-21 000 12 01 00 -39.6 -41.6 29.22 3 9 77 52 000 122 48 22 -24-22-21 000 13 01 01 -40.5 -42.9 29.23 2 9 100 75 000 116 59 23 -25-23-22 000 14 01 02 -40.8 -43.4 29.25 3 9 115 89 000 114 60 25 -24-24-22 000 15 01 03 -40.0 -43.1 29.26 3 9 116 90 000 107 59 28 -24-24-23 000 16 01 04 -39.4 -42.7 29.27 5 9 117 91 000 105 56 29 -24-24-23 000 17 01 05 -38.4 -41.7 29.28 5 10 114 89 000 104 56 29 -24-24-22 000 18 01 06 -37.7 -40.1 29.28 5 10 112 87 000 116 56 34 -23-24-22 000 19 01 07 -36.6 -38.8 29.29 4 13 106 80 -002 118 42 48 -23-23-23 000 20 01 08 -35.7 -38.3 29.30 4 12 106 81 -001 112 41 58 -24-23-22 000 21 01 09 -35.8 -38.6 29.31 4 11 112 86 -001 109 40 57 -25-22-22 000 22 01 10 -35.7 -38.4 29.33 4 12 109 84 -001 110 45 48 -24-23-22 000 23 01 11 -35.6 -38.1 29.35 5 14 112 86 -002 112 47 37 -24-23-22 000 24 01 12 -36.0 -38.0 29.36 7 15 102 76 -002 121 42 34 -27-22-21 000 25 01 13 -36.6 -38.5 29.37 8 17 90 65 000 124 47 39 -27-23-20 000 26 01 14 -36.3 -38.2 29.38 8 19 87 61 -001 123 53 49 -26-23-21 000 27 01 15 -36.5 -38.5 29.40 7 15 72 47 -001 121 54 58 -25-24-21 000 28 01 16 -36.7 -38.7 29.40 5 13 85 59 -001 124 45 60 -24-23-22 000 29 01 17 -37.2 -39.3 29.42 6 10 112 87 -002 124 45 57 -25-23-21 000 30 01 18 -38.3 -40.3 29.43 6 13 110 85 -001 124 44 55 -24-23-21 000 31 01 19 -39.5 -41.5 29.45 7 14 107 81 -002 124 38 53 -24-21-21 000 32 01 20 -39.8 -41.8 29.46 7 15 84 58 -002 124 38 49 -24-21-21 000 33 01 21 -40.0 -41.9 29.47 7 14 67 41 -001 124 54 46 -26-23-21 000 34 01 22 -40.8 -42.8 29.48 5 13 77 52 -002 124 96 44 -26-23-22 000 35 01 23 -41.1 -43.3 29.50 4 11 100 74 -001 120 88 44 -27-23-22 000 36 02 00 -40.3 -43.3 29.51 3 10 110 84 -001 109106 46 -26-24-22 000 37 02 01 -39.7 -42.9 29.52 2 9 109 84 000 104108 50 -26-24-22 000 38 02 02 -40.2 -43.4 29.53 3 6 120 94 000 106106 55 -25-23-22 000 39 02 03 -41.1 -43.8 29.54 3 5 117 91 002 113 87 57 -25-23-22 000 40 02 04 -41.3 -43.5 29.54 3 5 110 85 003 121 59 57 -25-23-23 000 41 02 05 -41.6 -43.6 29.55 2 4 102 76 002 122 67 59 -25-23-23 000 42 02 06 -41.1 -42.9 29.57 1 2 113 87 003 124 62 59 -25-24-23 000 43 02 07 -40.3 -42.0 29.57 0 1 158 132 001 124 59 54 -25-24-23 000 44 02 08 -39.6 -41.2 29.57 2 2 168 142 000 124 71 54 -24-24-22 000 45 02 09 -39.3 -40.9 29.58 3 3 169 144 000 124 68 57 -24-24-22 000 46 02 10 -39.2 -40.8 29.59 3 3 152 126 000 124 55 58 -24-23-22 000 47 02 11 -39.8 -41.5 29.59 2 2 127 101 000 124 50 59 -24-22-22 000 48 02 12 -40.3 -42.1 29.61 0 1 12 347 000 123 56 57 -24-23-22 000 49 02 13 -40.5 -42.3 29.62 0 0 333 308 000 123 61 54 -25-23-22 000 50 02 14 -40.3 -42.0 29.63 1 1 164 138 000 124 70 54 -24-23-22 000 51 02 15 -40.7 -42.4 29.63 2 2 160 135 000 124 79 57 -25-23-22 000 52 02 16 -40.8 -42.5 29.63 1 2 155 130 000 124 81 59 -25-23-22 000 53 02 17 -40.2 -41.9 29.63 0 1 156 131 000 124 76 59 -24-23-22 000 54 02 18 -40.2 -41.9 29.63 1 1 290 264 000 123 73 61 -24-22-22 000 55 02 19 -40.4 -42.1 29.63 1 1 263 237 000 124 72 63 -24-22-22 000 56 02 20 -40.5 -42.2 29.64 1 1 241 215 000 124 72 65 -24-22-22 000 57 02 21 -40.5 -42.2 29.64 1 1 225 200 000 123 72 67 -24-23-22 000 58 02 22 -40.7 -42.5 29.64 1 1 229 204 000 124 71 69 -24-23-22 000 59 02 23 -41.1 -42.9 29.64 2 2 244 219 000 123 69 68 -24-23-22 000 60 03 00 -41.0 -42.9 29.65 3 3 242 217 000 123 68 69 -24-23-22 000 61 03 01 -41.3 -44.2 29.64 4 4 237 211 000 109 66 70 -24-23-22 000 62 03 02 -40.9 -44.4 29.64 4 4 236 210 001 101 64 71 -24-23-22 000 63 03 03 -40.3 -43.8 29.63 4 4 243 217 001 100 62 71 -24-22-22 000 64 03 04 -38.1 -41.1 29.64 4 7 244 219 000 106 63 72 -24-22-22 000 65 03 05 -35.2 -35.9 29.64 3 6 254 228 000 133 68 72 -24-22-21 001 66 03 06 -34.4 -35.8 29.64 3 4 265 240 000 125 76 70 -25-22-22 001 67 03 07 -34.6 -36.9 29.64 3 5 280 254 001 115 89 68 -26-22-22 001 68 03 08 -35.3 -37.8 29.64 3 6 278 253 000 115100 69 -25-22-22 000 69 03 09 -35.3 -37.7 29.64 3 6 280 255 000 112109 71 -25-22-22 000 70 03 10 -34.9 -38.3 29.64 2 6 263 237 000 100124 71 -24-23-22 000 71 03 11 -35.2 -38.5 29.65 1 5 232 206 000 100126 73 -24-24-22 000 72 03 12 -35.3 -38.4 29.66 0 3 339 313 000 103127 78 -24-24-22 000 73 03 13 -35.2 -38.0 29.66 2 4 352 326 000 107127 74 -23-24-23 000 74 03 14 -35.1 -38.3 29.67 2 5 0 334 001 104127 72 -23-24-23 000 75 03 15 -35.7 -39.3 29.67 2 3 41 15 001 97126 69 -23-24-24 001 76 03 16 -36.6 -40.3 29.67 3 3 71 45 001 96121 69 -22-23-24 000 77 03 17 -37.6 -41.0 29.67 3 3 71 46 001 101114 69 -23-23-24 000 78 03 18 -38.4 -40.9 29.67 3 3 63 38 001 112114 67 -23-23-23 000 79 03 19 -39.4 -41.0 29.67 2 2 60 35 001 124113 61 -24-23-23 000 80 03 20 -40.4 -42.3 29.67 2 2 86 61 001 123112 54 -24-23-23 000 81 03 21 -41.5 -43.5 29.67 2 2 97 71 001 122112 50 -25-23-23 000 82 03 22 -42.0 -44.3 29.67 2 2 113 88 001 118111 47 -25-23-23 000 83 03 23 -42.4 -44.8 29.67 1 2 149 124 001 117107 46 -26-23-23 000 84 04 00 -42.2 -44.2 29.67 2 2 156 131 001 123101 47 -26-23-23 000 85 04 01 -41.6 -43.4 29.65 3 3 160 134 000 124 91 39 -25-23-23 000 86 04 02 -41.1 -42.8 29.63 3 3 178 153 001 124 83 28 -25-23-23 000 87 04 03 -40.9 -42.6 29.61 3 4 195 169 002 124 86 18 -25-23-22 000 88 04 04 -41.0 -42.7 29.59 4 4 210 184 001 124 90 14 -25-23-22 000 89 04 05 -41.0 -42.7 29.57 4 4 230 204 002 124 81 13 -25-23-21 000 90 04 06 -41.0 -42.7 29.55 4 4 240 215 003 124 64 16 -24-22-21 000 91 04 07 -41.3 -43.0 29.53 5 5 239 213 005 124 53 19 -24-22-20 000 92 04 08 -41.3 -44.4 29.51 6 6 230 204 003 106 45 17 -24-22-20 000 93 04 09 -39.7 -42.8 29.48 6 8 224 198 003 103 39 16 -23-21-18 000 94 04 10 -37.8 -38.1 29.45 7 9 221 195 002 142 33 13 -21-20-18 000 95 04 11 -38.4 -39.0 29.41 7 8 220 195 000 142 29 13 -20-19-17 000 96 04 12 -39.5 -41.0 29.38 8 9 213 188 001 128 26 13 -19-18-17 000 97 04 13 -38.4 -39.9 29.35 8 10 210 185 003 127 25 13 -18-17-16 000 98 04 14 -37.1 -38.2 29.31 9 10 213 187 003 130 26 14 -17-17-16 000 99 04 15 -36.6 -37.3 29.27 9 11 215 189 001 137 26 12 -17-16-15 000 100 04 16 -36.5 -37.1 29.23 9 11 220 195 002 140 25 11 -17-15-15 000 101 04 17 -36.6 -37.2 29.21 9 10 221 195 003 140 23 10 -17-15-15 000 102 04 18 -36.7 -37.3 29.18 9 10 213 188 005 140 20 10 -17-14-14 000 103 04 19 -37.6 -38.4 29.16 8 9 214 188 004 142 17 10 -17-13-13 000 104 04 20 -38.2 -38.9 29.14 7 7 210 184 002 143 16 9 -15-14-13 000 105 04 21 -38.6 -39.4 29.12 7 7 215 190 004 142 19 7 -14-14-13 000 106 04 22 -37.6 -38.1 29.10 7 7 211 185 000 139 21 7 -14-14-13 000 107 04 23 -35.0 -35.0 29.09 5 5 187 161 000 139 23 8 -15-15-14 000 108 05 00 -35.9 -36.1 29.08 4 4 137 112 000 139 17 9 -15-14-15 000 109 05 01 -36.4 -37.6 29.07 3 3 92 66 002 124 24 8 -16-16-15 000 110 05 02 -37.9 -39.3 29.07 2 5 86 60 000 124 31 8 -17-17-16 000 111 05 03 -37.9 -39.3 29.06 2 7 114 88 000 124 26 9 -18-16-17 000 112 05 04 -37.7 -39.0 29.05 4 9 146 120 000 124 30 9 -17-17-18 000 113 05 05 -37.0 -37.8 29.04 5 9 128 102 000 131 39 9 -17-16-16 000 114 05 06 -36.9 -38.0 29.03 1 4 176 150 000 126 39 10 -17-15-16 000 115 05 07 -34.6 -35.5 29.03 2 3 195 170 000 125 47 10 -17-15-16 000 116 05 08 -32.6 -32.8 29.02 4 4 190 164 000 133 66 19 -18-15-15 000 117 05 09 -30.9 -31.1 29.02 5 5 174 148 000 131 74 32 -17-15-16 000 118 05 10 -30.5 -30.6 29.01 5 5 163 138 000 132 77 39 -17-15-15 000 119 05 11 -30.7 -31.0 29.00 6 6 171 146 001 132 77 30 -16-14-15 000 120 05 12 -30.9 -31.2 29.00 5 5 182 157 000 133 72 19 -15-14-15 000 * 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.