Halley site lat/lon = (-75.5560,-25.6200) cell lat/lon = (-75.5669,-25.5697) Forecast initialized at 2026-01-13/12 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 13 12 -6.6 -10.0 29.03 5 6 74 48 000 75 65 54 -7 -7 -7 000 1 13 13 -6.1 -9.2 29.02 5 7 72 46 000 80 69 58 -7 -7 -7 000 2 13 14 -5.9 -8.8 29.01 5 7 72 47 -001 82 72 59 -7 -7 -7 000 3 13 15 -5.6 -8.4 29.01 5 7 71 46 000 83 73 61 -7 -7 -7 000 4 13 16 -5.5 -8.1 29.01 5 6 79 53 000 84 72 62 -7 -7 -7 000 5 13 17 -5.4 -7.9 29.01 5 7 88 62 000 84 66 61 -7 -7 -7 000 6 13 18 -5.4 -8.2 28.99 4 6 91 65 000 83 58 60 -7 -7 -7 000 7 13 19 -5.6 -8.3 28.98 4 5 91 65 000 82 57 58 -7 -7 -7 000 8 13 20 -6.1 -8.2 28.98 4 6 87 62 000 85 59 57 -7 -7 -7 000 9 13 21 -6.8 -8.7 28.96 4 6 93 68 000 88 63 59 -7 -7 -7 000 10 13 22 -7.8 -9.3 28.96 5 8 89 64 000 93 70 61 -7 -7 -8 000 11 13 23 -8.9 -9.8 28.97 5 9 89 64 000 102 79 63 -7 -7 -8 000 12 14 00 -9.8 -10.2 28.95 6 10 94 68 000 109 93 66 -7 -8 -8 000 13 14 01 -9.9 -10.1 28.95 5 11 100 75 000 110104 68 -7 -8 -8 000 14 14 02 -10.3 -10.6 28.95 5 12 106 81 000 110107 70 -7 -8 -8 000 15 14 03 -10.7 -10.9 28.96 6 13 105 79 000 110103 71 -7 -8 -9 000 16 14 04 -10.8 -11.1 28.96 7 14 94 68 000 111 98 72 -7 -8 -9 000 17 14 05 -10.8 -11.0 28.96 8 14 90 64 000 111 95 72 -7 -8 -9 000 18 14 06 -10.5 -10.7 28.96 9 16 91 65 000 110100 71 -7 -8 -9 000 19 14 07 -9.7 -9.9 28.96 12 19 85 59 000 110102 68 -9 -8 -9 000 20 14 08 -7.4 -8.0 28.95 12 17 78 53 000 103110 65 -8-10 -8 000 21 14 09 -6.8 -8.0 28.96 12 17 79 53 000 96110 61 -8 -9 -8 000 22 14 10 -6.1 -7.1 28.95 11 14 77 51 000 98109 61 -7 -9 -8 000 23 14 11 -5.1 -6.3 28.95 11 13 75 50 000 95108 59 -6 -8 -9 000 24 14 12 -4.5 -6.0 28.95 11 13 74 49 000 91107 55 -6 -7 -8 000 25 14 13 -4.2 -5.9 28.95 11 12 71 46 000 90107 65 -6 -7 -8 000 26 14 14 -3.9 -5.6 28.95 10 12 75 49 000 89106 84 -5 -7 -8 000 27 14 15 -3.2 -5.2 28.95 10 12 74 48 000 86103 95 -4 -6 -7 000 28 14 16 -2.8 -4.8 28.95 10 11 70 45 000 85101101 -4 -5 -7 000 29 14 17 -2.6 -4.6 28.95 10 12 71 45 000 85101101 -4 -5 -7 000 30 14 18 -2.7 -4.9 28.96 11 12 74 49 000 84100100 -4 -5 -7 000 31 14 19 -2.7 -4.7 28.97 10 12 80 55 000 86101 97 -4 -5 -7 000 32 14 20 -2.9 -4.5 28.97 10 13 82 57 000 89101104 -4 -5 -6 001 33 14 21 -3.1 -4.5 28.98 10 14 77 51 -002 90 99109 -4 -5 -6 004 34 14 22 -3.2 -4.7 28.98 11 15 74 48 000 91 93105 -4 -5 -6 003 35 14 23 -3.6 -4.9 28.98 11 16 75 49 000 92 99101 -4 -5 -6 001 36 15 00 -3.8 -5.1 28.98 11 16 75 50 000 93105101 -4 -5 -6 002 37 15 01 -4.3 -5.4 28.99 11 16 74 48 000 95105 92 -4 -5 -6 003 38 15 02 -5.0 -5.8 28.99 11 15 78 53 000 97 97 91 -4 -5 -6 002 39 15 03 -5.5 -6.4 28.99 11 15 79 53 000 99 93 97 -4 -5 -6 002 40 15 04 -5.9 -6.6 29.00 11 15 75 49 000 100100103 -5 -5 -6 002 41 15 05 -6.4 -6.7 29.01 11 14 74 49 -001 104 99109 -5 -5 -6 003 42 15 06 -6.6 -6.9 29.02 10 14 73 48 -001 105101108 -5 -5 -7 004 43 15 07 -6.3 -6.8 29.02 10 15 74 49 -001 102104102 -5 -6 -7 004 44 15 08 -5.9 -6.7 29.03 10 15 74 48 000 99104106 -5 -6 -7 007 45 15 09 -5.6 -6.4 29.03 11 15 73 48 000 99103108 -5 -6 -7 013 46 15 10 -5.0 -5.8 29.03 11 15 70 44 000 98102108 -5 -6 -7 009 47 15 11 -4.2 -5.1 29.04 11 15 64 38 000 96101107 -5 -6 -7 010 48 15 12 -3.6 -4.7 29.04 11 14 66 40 000 94100104 -5 -6 -6 006 49 15 13 -3.0 -4.2 29.04 11 13 64 38 000 93104107 -4 -6 -6 003 50 15 14 -2.4 -3.8 29.04 11 13 61 36 000 90105109 -4 -5 -6 008 51 15 15 -2.2 -3.7 29.04 11 12 59 33 000 89105108 -3 -5 -6 004 52 15 16 -2.1 -3.4 29.05 10 13 63 37 000 91101109 -3 -5 -6 043 53 15 17 -1.8 -2.9 29.05 11 13 55 30 000 93102109 -3 -4 -5 070 54 15 18 -1.6 -3.0 29.05 11 14 43 17 000 89101108 -3 -4 -5 040 55 15 19 -1.8 -2.9 29.05 10 13 38 12 000 92102109 -3 -4 -5 017 56 15 20 -2.1 -3.3 29.06 11 14 50 25 000 92 99109 -3 -4 -5 031 57 15 21 -2.4 -3.5 29.06 10 13 62 37 000 93 94109 -3 -4 -5 014 58 15 22 -2.7 -3.7 29.07 10 15 78 53 000 94 99108 -4 -5 -6 063 59 15 23 -2.7 -3.6 29.07 14 18 62 36 000 95104104 -3 -4 -5 043 60 16 00 -3.0 -3.8 29.08 11 15 63 38 000 96105109 -4 -5 -6 013 61 16 01 -4.0 -4.6 29.08 11 18 73 48 000 99101 99 -4 -4 -6 015 62 16 02 -3.9 -4.6 29.07 11 16 74 49 000 98101105 -4 -5 -6 007 63 16 03 -3.9 -4.4 29.07 10 15 69 43 000 99104108 -4 -5 -6 011 64 16 04 -3.8 -4.4 29.08 10 13 58 33 000 99105 92 -4 -5 -6 011 65 16 05 -3.8 -4.3 29.09 8 10 59 33 000 99105 93 -4 -5 -6 006 66 16 06 -3.7 -4.2 29.09 7 8 62 37 -001 99105 90 -4 -5 -6 006 67 16 07 -4.0 -4.4 29.09 5 7 57 32 -001 101 99 90 -4 -5 -6 002 68 16 08 -3.9 -4.3 29.10 7 9 55 29 000 101 98 96 -4 -5 -6 004 69 16 09 -3.4 -3.9 29.11 7 9 56 30 -001 99101 98 -4 -5 -6 007 70 16 10 -2.4 -3.5 29.11 8 11 51 25 000 93105100 -4 -5 -6 011 71 16 11 -2.0 -3.4 29.12 9 12 54 28 000 90102107 -3 -5 -6 020 72 16 12 -1.8 -3.5 29.12 9 11 53 28 000 88 96105 -3 -4 -5 007 73 16 13 -1.3 -3.4 29.12 8 9 47 22 000 84 97 98 -3 -4 -5 004 74 16 14 -1.1 -3.3 29.12 6 9 55 30 000 83 95 96 -2 -4 -5 004 75 16 15 -0.8 -3.0 29.12 7 8 61 35 000 83 96 97 -2 -4 -5 003 76 16 16 -0.8 -2.7 29.11 8 9 61 35 000 85 97102 -2 -3 -5 008 77 16 17 -0.6 -2.6 29.12 7 9 62 37 000 84 96 98 -2 -3 -5 006 78 16 18 -0.6 -2.3 29.12 6 7 57 32 000 87 99102 -2 -3 -5 010 79 16 19 -0.7 -2.1 29.12 4 5 37 12 000 89101105 -2 -3 -5 015 80 16 20 -1.0 -2.1 29.12 3 4 7 342 000 92102103 -2 -3 -5 013 81 16 21 -1.9 -2.6 29.13 1 4 349 323 000 95101106 -2 -3 -5 001 82 16 22 -1.6 -2.1 29.13 0 3 191 166 000 97102107 -2 -3 -5 004 83 16 23 -1.8 -2.2 29.13 1 2 351 326 -006 99103108 -2 -3 -4 060 84 17 00 -2.3 -3.0 29.14 5 10 12 346 -001 96 96105 -3 -4 -5 209 85 17 01 -5.0 -5.2 29.14 5 12 96 70 000 104 94101 -3 -4 -6 009 86 17 02 -5.0 -5.1 29.14 6 12 102 77 000 104 98101 -3 -4 -6 000 87 17 03 -4.2 -4.6 29.13 8 14 100 74 000 101 94103 -3 -4 -5 001 88 17 04 -5.6 -5.7 29.12 7 12 94 69 000 105100101 -3 -4 -6 002 89 17 05 -5.0 -5.9 29.12 9 13 93 67 000 98100 97 -4 -4 -6 003 90 17 06 -5.0 -5.9 29.12 8 12 92 67 000 97100 97 -4 -5 -6 001 91 17 07 -4.8 -6.4 29.11 8 11 96 71 000 91 98 98 -4 -5 -6 000 92 17 08 -4.9 -6.4 29.11 8 12 91 65 000 92 98 94 -5 -5 -6 000 93 17 09 -4.5 -5.4 29.10 8 10 89 63 001 96 98 90 -5 -5 -6 000 94 17 10 -4.1 -5.7 29.10 8 10 84 58 000 90103 87 -5 -5 -6 000 95 17 11 -4.0 -5.9 29.10 7 11 92 66 000 88 88106 -5 -5 -6 004 96 17 12 -3.4 -5.9 29.09 6 10 111 85 000 83 78 97 -5 -5 -6 001 97 17 13 -3.2 -6.1 29.07 5 9 121 96 001 79 72 81 -4 -5 -6 000 98 17 14 -2.8 -6.1 29.05 5 8 144 118 000 77 73 78 -4 -5 -5 000 99 17 15 -2.6 -5.7 29.03 6 7 171 145 001 77 72 74 -4 -5 -5 000 100 17 16 -2.5 -5.2 29.02 8 8 188 162 001 80 70 73 -3 -4 -5 000 101 17 17 -2.5 -4.8 29.01 8 9 198 172 000 83 66 74 -3 -4 -4 000 102 17 18 -2.8 -4.6 28.99 9 11 204 179 000 87 64 74 -3 -3 -4 000 103 17 19 -3.4 -5.0 28.98 8 13 209 183 000 88 63 72 -2 -3 -4 000 104 17 20 -4.2 -6.0 28.97 8 13 214 188 001 88 59 65 -2 -3 -4 000 105 17 21 -5.3 -6.8 28.95 8 15 217 192 001 91 54 60 -2 -2 -4 000 106 17 22 -6.5 -7.2 28.94 7 14 219 193 001 100 53 60 -1 -2 -4 000 107 17 23 -7.6 -7.9 28.93 7 12 216 190 001 107 53 59 -2 -2 -4 000 108 18 00 -10.8 -11.0 28.92 5 8 212 186 000 111 53 56 -2 -2 -4 000 109 18 01 -13.2 -13.4 28.90 4 5 206 181 001 113 52 57 -2 -2 -3 000 110 18 02 -14.4 -14.7 28.89 4 5 196 170 001 114 52 57 -3 -2 -3 000 111 18 03 -14.8 -15.3 28.87 4 5 192 167 000 115 53 55 -4 -3 -3 000 112 18 04 -14.8 -15.4 28.86 3 7 176 151 000 114 56 52 -4 -3 -4 000 113 18 05 -13.7 -14.2 28.86 3 9 147 121 000 113 58 51 -4 -4 -4 000 114 18 06 -13.2 -13.7 28.86 4 8 118 93 000 113 59 52 -5 -4 -4 000 115 18 07 -14.1 -14.3 28.85 3 11 92 67 000 114 62 53 -5 -5 -5 000 116 18 08 -12.5 -13.8 28.85 4 11 88 62 000 102 59 53 -6 -5 -5 000 117 18 09 -10.9 -12.8 28.85 3 9 88 63 001 95 64 54 -6 -5 -6 000 118 18 10 -9.2 -11.2 28.85 2 6 95 69 001 92 68 56 -5 -6 -6 000 119 18 11 -7.6 -10.1 28.85 2 4 79 54 000 87 44 58 -5 -5 -6 000 120 18 12 -6.7 -9.7 28.85 1 1 86 60 000 83 48 56 -5 -5 -6 000 * 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.