Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-01-28/00 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 28 00 -13.8 -15.6 29.25 6 9 94 68 000 89 88 67 -8 -8 -8 000 1 28 01 -16.4 -17.0 29.26 6 10 96 70 000 116 94 70 -9 -9 -9 000 2 28 02 -18.8 -19.5 29.27 5 10 104 78 -002 119 99 67 -9 -9 -9 000 3 28 03 -20.6 -21.4 29.29 5 10 107 82 000 121104 71 -9 -9-10 000 4 28 04 -17.1 -17.4 29.28 3 13 107 81 002 118109 74 -9 -9-11 000 5 28 05 -13.7 -14.9 29.28 4 19 92 66 001 105102 77 -8 -9-10 000 6 28 06 -10.7 -12.8 29.29 9 22 69 44 000 91 86 79 -9 -9-10 000 7 28 07 -10.4 -12.7 29.28 7 17 69 44 -001 90 88 84 -9-10-10 000 8 28 08 -10.8 -12.7 29.30 5 11 85 60 000 93 79 83 -10-10-10 000 9 28 09 -11.2 -12.8 29.28 4 10 108 82 000 96 78 72 -10 -9-10 000 10 28 10 -10.8 -13.1 29.27 4 8 118 93 000 90 77 67 -9 -9-10 000 11 28 11 -10.1 -12.5 29.26 4 7 127 101 000 89 77 64 -9 -9-10 000 12 28 12 -9.0 -11.6 29.25 5 9 112 86 000 86 81 65 -9 -9-10 000 13 28 13 -8.1 -10.9 29.23 4 9 108 82 000 85 82 65 -8 -9-10 000 14 28 14 -6.8 -9.6 29.24 4 10 110 85 000 84 83 65 -8 -8 -9 000 15 28 15 -6.0 -8.9 29.23 5 9 120 94 000 81 87 65 -7 -8 -9 000 16 28 16 -6.0 -8.9 29.22 7 10 119 94 000 81 83 64 -7 -8 -9 000 17 28 17 -6.6 -9.5 29.21 6 13 118 93 000 80 80 63 -7 -7 -9 000 18 28 18 -7.1 -9.3 29.20 4 11 148 122 000 86 80 61 -6 -7 -8 000 19 28 19 -8.1 -10.1 29.19 5 7 180 154 000 88 77 57 -6 -7 -8 000 20 28 20 -9.5 -10.8 29.18 6 7 196 171 001 98 72 53 -7 -7 -8 000 21 28 21 -10.9 -11.7 29.16 7 9 201 176 000 105 68 48 -7 -7 -9 000 22 28 22 -12.4 -12.9 29.15 7 11 204 179 000 111 66 42 -6 -7 -9 000 23 28 23 -14.0 -14.5 29.14 7 12 211 185 003 113 65 39 -6 -7 -9 000 24 29 00 -15.7 -16.3 29.12 6 11 208 182 001 115 78 35 -7 -8 -8 000 25 29 01 -17.5 -18.1 29.12 5 10 226 201 002 117 72 34 -7 -7 -8 000 26 29 02 -19.4 -19.9 29.12 5 8 238 212 001 120 58 34 -7 -7 -8 000 27 29 03 -20.6 -21.2 29.11 5 8 242 217 001 122 67 29 -7 -7 -7 000 28 29 04 -21.2 -21.8 29.09 4 7 252 227 001 122 95 23 -7 -8 -8 000 29 29 05 -21.7 -22.3 29.07 4 7 253 228 000 123 68 20 -7 -8 -7 000 30 29 06 -21.0 -21.2 29.05 3 7 257 232 000 122 48 20 -8 -7 -6 000 31 29 07 -21.7 -22.0 29.04 3 6 242 216 000 123 38 19 -8 -7 -6 000 32 29 08 -20.8 -21.1 29.04 3 6 223 197 000 122 38 18 -8 -7 -6 000 33 29 09 -18.6 -19.3 29.04 3 6 217 192 001 114 41 17 -8 -7 -7 000 34 29 10 -16.5 -18.0 29.02 1 3 226 201 002 103 37 16 -8 -7 -6 000 35 29 11 -14.6 -16.7 29.01 1 3 274 249 003 96 35 15 -8 -7 -6 000 36 29 12 -12.5 -14.8 29.00 2 4 300 274 003 93 34 15 -7 -7 -5 000 37 29 13 -10.5 -12.7 28.99 2 5 288 263 003 92 33 14 -7 -6 -5 000 38 29 14 -8.7 -11.9 28.99 4 9 239 213 004 82 33 14 -7 -5 -4 000 39 29 15 -7.9 -11.2 28.98 4 11 222 196 003 80 35 13 -6 -5 -4 000 40 29 16 -7.5 -10.6 28.98 4 12 220 195 002 81 37 13 -5 -5 -4 000 41 29 17 -7.2 -9.4 28.98 2 7 256 230 000 85 59 12 -4 -5 -4 000 42 29 18 -6.8 -8.1 28.98 3 13 281 255 000 94 71 12 -4 -5 -4 000 43 29 19 -6.5 -7.3 28.98 7 15 252 226 001 99 72 12 -4 -5 -4 000 44 29 20 -7.6 -8.0 28.99 6 14 250 224 001 105 82 13 -4 -5 -4 000 45 29 21 -9.9 -10.1 29.00 1 3 160 134 001 109102 13 -5 -5 -5 000 46 29 22 -13.2 -13.4 29.01 7 13 84 58 000 113105 15 -6 -6 -6 000 47 29 23 -14.6 -14.9 29.02 8 17 86 60 000 115106 17 -9 -7 -6 000 48 30 00 -17.4 -17.8 29.03 8 20 92 66 000 118 81 20 -9 -8 -7 000 49 30 01 -17.7 -18.1 29.05 9 22 83 58 000 118 60 23 -9 -9 -8 000 50 30 02 -16.7 -17.1 29.06 11 23 74 49 001 117 82 29 -10 -9-10 000 51 30 03 -16.4 -16.7 29.06 12 26 73 47 000 117 88 34 -10-10-10 000 52 30 04 -16.0 -16.4 29.06 13 27 74 49 000 116103 38 -11-11-10 000 53 30 05 -16.0 -16.4 29.06 13 30 79 53 000 116 97 35 -11-11-11 000 54 30 06 -15.1 -15.4 29.06 18 29 73 48 000 115 95 39 -13-11-11 000 55 30 07 -11.1 -11.9 29.04 20 29 71 46 000 105113 36 -12-13-12 000 56 30 08 -10.1 -11.9 29.03 21 30 76 50 000 94113 38 -11-12-12 000 57 30 09 -9.4 -11.2 29.02 20 29 75 49 -001 94112 43 -10-12-13 000 58 30 10 -8.9 -10.9 29.01 21 30 75 50 -001 92110 40 -10-11-13 000 59 30 11 -8.8 -10.6 29.00 24 32 75 49 -002 93111 50 -10-11-12 000 60 30 12 -8.7 -10.2 28.98 25 34 77 52 000 95112 85 -10-11-12 000 61 30 13 -8.0 -9.4 28.97 27 35 80 55 002 96111102 -9-10-11 000 62 30 14 -7.4 -8.3 28.96 26 34 77 51 -002 99110106 -9-10-10 006 63 30 15 -6.4 -7.7 28.95 25 34 77 51 -001 95105105 -7 -9-10 068 64 30 16 -5.6 -7.0 28.93 26 34 77 52 001 93103105 -7 -8 -9 051 65 30 17 -5.5 -6.9 28.92 28 36 80 55 002 94103103 -7 -8 -8 062 66 30 18 -5.4 -6.8 28.91 27 36 79 53 001 93104105 -6 -8 -8 044 67 30 19 -5.5 -7.0 28.90 27 37 77 52 001 92104105 -6 -8 -9 033 68 30 20 -5.8 -7.3 28.90 27 36 78 52 000 93103105 -7 -8 -9 033 69 30 21 -6.1 -7.6 28.90 26 36 79 53 000 93103103 -7 -8 -9 040 70 30 22 -6.4 -7.9 28.89 27 37 81 55 -001 94101103 -7 -8 -8 046 71 30 23 -6.5 -7.9 28.89 27 37 82 56 000 94101105 -7 -8 -8 045 72 31 00 -6.3 -7.7 28.89 25 37 80 54 001 94103108 -7 -8 -8 026 73 31 01 -6.1 -7.5 28.88 25 36 79 53 000 94102108 -7 -8 -8 030 74 31 02 -5.8 -7.2 28.87 25 36 78 52 000 94102108 -6 -7 -8 015 75 31 03 -5.6 -7.0 28.87 24 34 77 52 001 94104108 -6 -7 -8 015 76 31 04 -5.6 -7.0 28.86 24 34 79 53 001 94104108 -6 -7 -8 013 77 31 05 -5.6 -7.0 28.86 24 35 79 53 002 94103107 -6 -7 -8 011 78 31 06 -5.5 -6.9 28.85 24 34 78 52 -001 94103108 -6 -7 -8 021 79 31 07 -5.3 -6.7 28.85 24 34 76 50 -001 93103108 -6 -7 -8 014 80 31 08 -5.1 -6.5 28.85 24 33 76 50 001 93103108 -6 -7 -8 021 81 31 09 -5.0 -6.4 28.85 23 31 74 49 -001 92103108 -6 -7 -8 020 82 31 10 -4.8 -6.2 28.85 23 31 74 48 -003 92104108 -6 -7 -8 008 83 31 11 -4.5 -6.0 28.86 22 30 73 47 000 91103106 -6 -7 -8 015 84 31 12 -4.2 -5.8 28.86 22 29 72 47 000 90102106 -5 -7 -8 020 85 31 13 -4.0 -5.6 28.85 21 28 72 46 -002 89101109 -5 -7 -8 010 86 31 14 -3.6 -5.3 28.85 21 27 72 46 000 89101108 -5 -6 -8 011 87 31 15 -3.4 -5.2 28.84 20 27 72 47 001 88100107 -5 -6 -7 010 88 31 16 -3.2 -4.9 28.83 19 26 72 47 -001 88 98110 -4 -6 -7 005 89 31 17 -3.0 -4.7 28.82 18 25 72 47 -001 88 95110 -4 -5 -6 005 90 31 18 -3.0 -4.6 28.82 17 23 73 48 -001 89 98110 -4 -5 -6 004 91 31 19 -3.1 -4.6 28.81 16 22 76 50 000 90101110 -4 -5 -6 005 92 31 20 -3.4 -4.6 28.80 14 22 79 54 000 93100103 -4 -5 -6 007 93 31 21 -3.6 -4.8 28.79 14 21 78 52 000 93 93 97 -4 -5 -6 014 94 31 22 -4.0 -5.0 28.78 12 20 77 51 000 95 97 94 -4 -5 -6 007 95 31 23 -4.3 -5.1 28.77 11 19 75 49 -001 96 93 99 -5 -6 -6 007 96 01 00 -4.7 -5.5 28.75 10 17 84 59 -001 98 96 99 -5 -5 -6 009 97 01 01 -5.0 -5.3 28.73 10 18 99 73 000 103 98 98 -5 -6 -6 007 98 01 02 -5.3 -5.7 28.71 11 19 90 65 000 102104 94 -5 -6 -6 006 99 01 03 -5.4 -5.8 28.70 11 18 75 49 000 103 97 96 -5 -6 -7 004 100 01 04 -5.9 -6.1 28.69 8 18 82 57 001 105 99 98 -5 -6 -7 003 101 01 05 -6.5 -6.7 28.68 10 19 93 67 001 106102101 -5 -6 -7 005 102 01 06 -6.7 -6.9 28.66 9 19 86 60 001 106101103 -5 -6 -7 004 103 01 07 -7.0 -7.1 28.65 9 17 85 59 000 107 99102 -5 -6 -7 002 104 01 08 -6.4 -6.5 28.63 10 16 83 57 000 106 95101 -5 -6 -7 001 105 01 09 -5.8 -6.2 28.62 10 14 85 59 000 103 98 99 -5 -6 -7 001 106 01 10 -5.4 -6.1 28.61 9 14 84 58 000 99 98 99 -5 -6 -7 000 107 01 11 -4.9 -5.9 28.60 8 12 83 58 000 96 95 98 -5 -6 -7 000 108 01 12 -4.5 -5.6 28.58 7 10 89 64 000 95 90 97 -5 -6 -7 000 109 01 13 -4.2 -5.4 28.57 7 8 91 66 000 94 86 94 -5 -6 -6 000 110 01 14 -3.9 -5.2 28.55 6 7 91 66 000 92 86 91 -5 -6 -6 000 111 01 15 -3.6 -5.2 28.54 5 6 87 62 000 90 84 89 -5 -5 -6 000 112 01 16 -3.5 -5.3 28.53 4 5 84 59 000 89 81 87 -5 -5 -6 000 113 01 17 -3.6 -5.3 28.52 3 3 88 62 000 90 80 86 -5 -5 -6 000 114 01 18 -4.1 -5.3 28.51 2 3 105 79 000 92 80 87 -5 -5 -6 000 115 01 19 -4.5 -5.7 28.51 2 2 113 87 000 94 80 86 -5 -5 -6 000 116 01 20 -5.1 -6.1 28.51 2 2 114 89 000 96 80 86 -5 -5 -6 000 117 01 21 -5.9 -6.4 28.51 2 2 89 63 000 102 82 85 -4 -5 -6 000 118 01 22 -7.1 -7.2 28.51 2 3 56 31 000 106 84 85 -4 -5 -6 000 119 01 23 -10.0 -10.5 28.52 3 4 48 22 000 109 88 88 -5 -6 -6 000 120 02 00 -12.8 -13.1 28.53 3 5 72 47 000 113 93 90 -5 -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.