Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2025-12-21/00 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 21 00 -10.6 -12.8 29.21 4 5 244 218 000 75 55 34 -5 -4 -5 000 1 21 01 -11.9 -12.2 29.20 5 6 249 224 000 110 61 36 -4 -4 -5 000 2 21 02 -14.5 -15.0 29.19 4 6 247 221 000 114 68 36 -4 -4 -5 000 3 21 03 -15.7 -16.3 29.19 4 6 275 250 000 116 69 36 -4 -4 -4 000 4 21 04 -17.0 -17.4 29.19 3 5 256 231 001 117 71 42 -4 -4 -4 000 5 21 05 -18.4 -18.5 29.18 1 3 132 106 001 119 78 43 -5 -5 -5 000 6 21 06 -17.5 -17.6 29.18 1 1 331 306 000 118 73 40 -5 -5 -5 000 7 21 07 -17.3 -18.3 29.17 0 2 100 74 000 109 72 40 -5 -5 -5 000 8 21 08 -15.6 -16.5 29.15 0 2 75 49 000 108 74 40 -5 -5 -5 000 9 21 09 -12.8 -12.8 29.16 1 4 322 296 000 113 79 41 -5 -5 -5 000 10 21 10 -10.1 -10.1 29.16 2 4 298 272 000 110 89 40 -5 -5 -6 000 11 21 11 -8.0 -8.0 29.13 2 6 289 263 000 108 92 40 -5 -5 -6 000 12 21 12 -6.3 -6.3 29.12 3 7 280 254 000 106 99 41 -4 -5 -6 000 13 21 13 -4.8 -5.5 29.12 3 7 272 247 000 98101 42 -4 -5 -6 000 14 21 14 -3.4 -4.7 29.11 3 9 273 248 000 92100 41 -4 -5 -6 000 15 21 15 -2.3 -4.0 29.11 3 9 262 237 000 88 98 41 -3 -5 -6 000 16 21 16 -1.9 -3.8 29.12 4 8 254 228 000 86 98 40 -3 -4 -6 000 17 21 17 -1.9 -3.8 29.12 4 8 256 230 000 86 97 39 -3 -4 -6 000 18 21 18 -2.2 -4.0 29.11 4 8 262 237 000 85 92 37 -3 -5 -6 000 19 21 19 -3.0 -4.5 29.11 3 7 268 243 000 87 84 37 -3 -5 -5 000 20 21 20 -4.1 -5.6 29.10 3 6 276 250 000 90 73 36 -4 -5 -5 000 21 21 21 -5.5 -6.3 29.11 3 4 280 255 000 97 67 36 -4 -5 -5 000 22 21 22 -6.6 -6.7 29.11 2 2 284 258 000 106 70 37 -4 -5 -5 000 23 21 23 -10.2 -10.3 29.12 0 1 90 64 000 110 80 38 -4 -5 -5 000 24 22 00 -9.0 -9.1 29.12 5 9 82 57 000 109 92 38 -5 -6 -6 000 25 22 01 -6.4 -6.5 29.13 8 10 79 53 000 106 84 41 -6 -6 -6 000 26 22 02 -6.1 -6.5 29.15 9 12 83 57 000 102 85 41 -6 -5 -6 000 27 22 03 -6.2 -6.4 29.16 11 14 73 47 000 104105 44 -5 -5 -7 000 28 22 04 -6.7 -8.3 29.17 14 16 78 53 000 93106 61 -6 -6 -7 000 29 22 05 -7.0 -8.5 29.19 14 17 87 61 000 95107 92 -6 -6 -7 000 30 22 06 -7.3 -8.7 29.20 15 19 79 54 000 95107111 -8 -7 -7 000 31 22 07 -8.5 -9.9 29.21 15 20 78 52 000 96107111 -8 -8 -8 000 32 22 08 -8.7 -10.1 29.22 15 22 73 47 000 96 96111 -9 -8 -8 000 33 22 09 -8.0 -9.3 29.23 15 21 80 54 -001 96 88111 -9 -8 -9 000 34 22 10 -7.2 -8.6 29.25 13 17 78 53 000 95100112 -8 -9 -8 000 35 22 11 -7.0 -8.7 29.25 12 14 78 52 000 92100112 -8 -9 -9 000 36 22 12 -7.2 -8.7 29.26 10 11 70 44 000 94100112 -9 -8 -8 000 37 22 13 -6.4 -7.7 29.27 12 17 69 43 -001 95108112 -8 -7 -8 000 38 22 14 -5.2 -6.1 29.27 14 18 73 48 -001 97108112 -6 -8 -8 000 39 22 15 -5.0 -6.1 29.27 14 17 78 52 -001 96107112 -6 -7 -8 000 40 22 16 -4.7 -5.9 29.27 15 18 78 52 000 95107111 -6 -7 -8 000 41 22 17 -4.3 -5.5 29.28 14 16 75 49 000 94104111 -5 -7 -8 012 42 22 18 -4.1 -5.5 29.29 14 18 69 44 -001 92102111 -5 -6 -7 019 43 22 19 -4.5 -6.5 29.30 14 19 68 43 000 87 94111 -5 -7 -8 006 44 22 20 -5.1 -7.2 29.30 16 20 75 49 -001 86 84112 -6 -7 -8 000 45 22 21 -5.7 -7.5 29.31 14 18 88 62 000 90 79112 -6 -7 -8 000 46 22 22 -5.4 -6.8 29.32 15 20 83 58 000 93 97110 -6 -7 -8 000 47 22 23 -5.3 -6.7 29.33 16 22 76 51 -001 93103106 -6 -7 -8 003 48 23 00 -5.8 -7.2 29.34 17 25 84 58 000 93100107 -6 -7 -7 005 49 23 01 -6.4 -7.7 29.35 17 25 85 59 000 95103108 -7 -7 -7 011 50 23 02 -6.6 -7.8 29.36 17 26 81 55 000 96 98106 -7 -7 -7 007 51 23 03 -6.6 -7.9 29.37 19 28 81 56 000 95 94103 -7 -6 -7 003 52 23 04 -6.5 -7.8 29.38 18 27 83 58 000 95 98111 -7 -7 -8 004 53 23 05 -6.4 -7.8 29.38 18 26 80 55 -001 95103108 -7 -7 -7 005 54 23 06 -6.3 -7.6 29.38 18 24 77 51 -001 95104 99 -7 -7 -7 004 55 23 07 -6.1 -7.4 29.38 19 25 78 52 001 94 88102 -7 -6 -7 001 56 23 08 -5.9 -7.2 29.39 17 22 77 51 000 94101103 -7 -7 -7 002 57 23 09 -5.3 -6.6 29.39 17 23 74 48 000 93 96 99 -6 -7 -7 002 58 23 10 -4.8 -6.3 29.40 18 24 72 47 000 92 93101 -6 -7 -7 001 59 23 11 -4.5 -6.0 29.40 17 22 75 50 -001 91106102 -6 -7 -8 001 60 23 12 -4.4 -6.0 29.40 17 22 75 49 000 90107 96 -6 -7 -8 001 61 23 13 -4.0 -5.6 29.39 16 21 74 48 000 89105101 -5 -7 -8 001 62 23 14 -3.7 -5.4 29.39 16 21 67 42 000 88102111 -5 -6 -8 002 63 23 15 -3.4 -5.1 29.39 17 21 69 43 000 88102102 -5 -6 -7 002 64 23 16 -3.2 -5.0 29.38 16 21 68 42 000 87100 99 -4 -6 -7 004 65 23 17 -3.0 -5.2 29.38 16 21 70 44 000 84 96 94 -4 -6 -7 001 66 23 18 -3.3 -5.4 29.38 16 21 71 45 001 85 96100 -4 -6 -7 001 67 23 19 -3.4 -5.3 29.38 15 20 75 49 001 87 94100 -4 -6 -7 000 68 23 20 -3.5 -5.4 29.37 14 20 77 52 000 88 94102 -4 -6 -7 000 69 23 21 -3.7 -5.6 29.36 15 21 84 59 000 87 84 95 -5 -6 -6 000 70 23 22 -4.0 -5.8 29.36 15 21 80 55 000 88 95 96 -5 -6 -7 000 71 23 23 -4.1 -5.3 29.36 15 23 82 57 001 93 97105 -5 -6 -7 003 72 24 00 -4.2 -5.6 29.35 17 25 82 57 000 92101 93 -5 -6 -7 003 73 24 01 -4.4 -6.1 29.34 15 25 81 55 001 90 97 95 -5 -6 -6 000 74 24 02 -4.6 -6.2 29.33 14 24 83 58 000 91 94 94 -5 -5 -6 000 75 24 03 -4.6 -6.1 29.32 14 23 80 54 000 91 96102 -4 -5 -6 000 76 24 04 -4.7 -6.3 29.30 14 24 82 56 000 90 90104 -5 -5 -6 001 77 24 05 -5.2 -6.9 29.30 16 24 81 55 002 90 95109 -5 -6 -7 000 78 24 06 -5.8 -7.7 29.29 17 24 80 55 000 89 86106 -6 -5 -6 000 79 24 07 -6.4 -9.1 29.28 17 25 80 55 000 82 75111 -6 -6 -7 000 80 24 08 -7.6 -10.7 29.26 16 24 82 56 -001 80 71103 -6 -5 -7 000 81 24 09 -7.7 -10.7 29.25 16 25 80 55 -002 81 69 70 -6 -5 -6 000 82 24 10 -7.3 -9.5 29.24 16 27 77 52 000 88 70 55 -6 -5 -6 000 83 24 11 -7.0 -8.7 29.24 17 24 73 47 000 92 61 51 -7 -6 -6 000 84 24 12 -6.3 -7.9 29.24 17 25 73 48 001 92 72 55 -7 -6 -7 000 85 24 13 -5.6 -7.5 29.23 18 26 73 47 001 89 70 55 -7 -6 -7 000 86 24 14 -4.9 -7.0 29.22 18 27 71 46 002 86 77 56 -6 -6 -7 000 87 24 15 -4.4 -6.9 29.21 18 27 69 43 001 83 88 53 -5 -7 -7 000 88 24 16 -4.1 -6.3 29.21 18 26 65 40 001 85 98 58 -5 -7 -7 000 89 24 17 -4.3 -5.9 29.21 18 26 60 35 001 90106 61 -5 -7 -8 000 90 24 18 -4.3 -5.8 29.21 19 26 65 39 000 92107 52 -6 -7 -8 000 91 24 19 -3.4 -5.2 29.20 20 28 66 41 001 87 99 77 -4 -6 -7 000 92 24 20 -4.2 -6.0 29.20 18 28 67 42 000 89100 63 -5 -6 -8 000 93 24 21 -5.0 -6.6 29.20 16 28 66 41 000 91 89 72 -5 -6 -7 000 94 24 22 -5.6 -7.3 29.20 17 29 69 43 000 91 97 68 -5 -6 -7 000 95 24 23 -5.7 -7.1 29.20 18 29 68 42 002 93103 63 -5 -6 -8 000 96 25 00 -5.2 -6.6 29.20 19 29 68 43 007 93105 71 -5 -7 -8 000 97 25 01 -5.5 -6.7 29.20 19 29 75 49 006 95106 75 -6 -7 -8 000 98 25 02 -6.1 -7.2 29.20 20 30 80 55 001 97106 85 -6 -7 -8 000 99 25 03 -6.1 -7.2 29.20 21 31 78 53 000 97108 96 -6 -7 -7 000 100 25 04 -6.1 -7.2 29.20 21 33 80 54 000 97 98108 -6 -6 -7 000 101 25 05 -5.9 -7.4 29.20 21 34 77 52 000 93 88107 -6 -6 -7 011 102 25 06 -6.4 -8.0 29.20 22 35 82 56 -002 93 93104 -6 -6 -6 005 103 25 07 -6.1 -7.8 29.21 23 35 80 55 003 92 97105 -6 -6 -6 006 104 25 08 -5.5 -7.2 29.21 23 35 76 51 000 90 97109 -6 -7 -7 008 105 25 09 -5.2 -7.4 29.22 23 34 75 50 000 86 91109 -6 -6 -7 005 106 25 10 -4.8 -7.2 29.22 22 33 73 47 001 84 91108 -6 -6 -7 000 107 25 11 -4.3 -6.4 29.22 22 32 76 50 001 85 85109 -5 -5 -6 000 108 25 12 -3.7 -6.2 29.23 23 33 73 47 000 82 91109 -5 -6 -7 000 109 25 13 -3.3 -6.2 29.23 23 32 71 45 -001 79 82108 -4 -6 -6 000 110 25 14 -3.5 -5.9 29.24 24 33 73 47 -001 83 94104 -5 -6 -6 000 111 25 15 -3.0 -5.6 29.24 24 34 71 46 -001 81 91107 -4 -6 -7 000 112 25 16 -2.5 -5.5 29.24 24 35 73 48 -001 77 84108 -3 -5 -6 000 113 25 17 -2.2 -4.7 29.25 25 34 72 47 -001 80 90102 -3 -5 -6 000 114 25 18 -2.2 -4.2 29.26 26 35 72 46 -002 85 96102 -3 -5 -6 011 115 25 19 -2.1 -3.5 29.27 26 36 72 47 -004 90100105 -3 -4 -5 034 116 25 20 -1.9 -3.3 29.28 26 36 73 47 000 90101107 -3 -4 -5 045 117 25 21 -2.1 -3.4 29.28 26 37 74 49 001 90101105 -3 -4 -5 041 118 25 22 -2.2 -3.5 29.30 27 38 73 47 -002 90100103 -3 -4 -5 035 119 25 23 -2.4 -3.6 29.31 27 38 73 48 001 91102102 -3 -4 -5 025 120 26 00 -2.9 -4.2 29.32 27 38 76 50 000 92101104 -4 -5 -5 021 * 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.