Heard Island site lat/lon = (-53.0000,72.6000) cell lat/lon = (-53.0015,72.5908) Forecast initialized at 2025-12-21/00 UTC MPAS cell scale: 17.3 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 4.2 1.3 29.07 24 29 311 23 000 78 77 77 3 2 1 000 1 21 01 4.0 1.4 29.07 23 38 313 25 001 82 81 80 3 2 1 000 2 21 02 3.9 1.4 29.08 23 37 312 25 000 82 85 98 3 1 0 000 3 21 03 3.7 1.5 29.07 24 38 310 23 000 83 89 92 2 1 0 001 4 21 04 3.8 1.2 29.07 24 38 312 25 -001 81 85 81 2 1 0 000 5 21 05 3.7 1.2 29.06 24 38 315 28 -001 81 87 93 2 1 0 000 6 21 06 3.7 1.1 29.07 26 40 316 28 -001 81 87 95 2 1 0 000 7 21 07 3.6 1.0 29.04 27 41 318 30 000 81 89 97 2 1 0 000 8 21 08 3.5 1.2 29.02 28 43 319 32 000 83 92103 2 1 0 000 9 21 09 3.5 1.5 29.01 29 43 319 31 -001 85 94103 2 1 0 002 10 21 10 3.6 1.6 28.99 30 44 317 29 -002 86 96102 2 1 0 000 11 21 11 3.6 1.7 28.98 29 43 313 26 -002 87 97102 2 1 0 001 12 21 12 3.7 1.7 28.97 29 44 312 24 -003 86 95103 2 1 0 002 13 21 13 3.5 1.9 29.00 28 42 311 24 -002 88 98102 2 1 0 005 14 21 14 3.5 1.8 28.99 29 43 309 22 000 87 97102 2 1 0 005 15 21 15 3.4 1.8 28.98 30 44 307 20 000 89 99102 2 0 0 007 16 21 16 3.4 1.9 28.99 30 44 301 14 000 90 99102 2 0 0 024 17 21 17 3.5 1.9 29.02 30 44 294 7 -001 89 98102 2 1 0 018 18 21 18 3.5 1.7 29.04 31 46 293 5 000 86 96102 2 1 0 015 19 21 19 3.4 1.6 29.06 32 46 294 7 -001 87 97103 2 0 0 009 20 21 20 3.5 1.6 29.07 34 49 292 4 000 86 96103 2 0 0 033 21 21 21 3.5 1.6 29.11 33 48 288 0 000 87 96103 2 1 0 018 22 21 22 3.3 1.5 29.15 32 46 287 0 -001 87 97103 2 0 0 004 23 21 23 3.2 1.4 29.18 33 47 287 0 -001 87 96102 1 0 0 014 24 22 00 3.1 1.2 29.21 32 48 288 1 -001 86 95102 1 0 0 017 25 22 01 3.0 1.2 29.24 31 44 288 1 000 87 96 92 1 0 0 008 26 22 02 3.2 1.0 29.27 31 44 286 359 000 84 92 92 1 0 0 000 27 22 03 3.2 0.8 29.29 29 41 291 3 000 83 91 92 1 0 0 000 28 22 04 3.2 0.7 29.31 30 43 289 1 000 82 89 88 1 0 0 013 29 22 05 3.1 0.6 29.33 30 42 292 5 000 82 90 83 1 0 0 000 30 22 06 3.1 0.7 29.34 30 43 294 7 000 83 91 88 1 0 0 000 31 22 07 3.2 0.4 29.35 31 43 291 3 000 80 88 99 1 0 0 000 32 22 08 2.8 0.6 29.37 31 44 289 1 000 84 92101 1 0 -1 009 33 22 09 2.5 0.8 29.38 31 44 289 1 000 87 97 99 0 0 -1 006 34 22 10 2.6 0.6 29.40 31 44 288 1 000 85 94 97 1 0 -1 004 35 22 11 2.9 0.3 29.40 31 43 287 0 001 82 90101 1 0 -1 000 36 22 12 2.5 0.7 29.42 30 43 284 356 000 87 96104 0 0 -1 010 37 22 13 2.9 0.4 29.43 31 42 283 355 002 82 90101 1 0 -1 015 38 22 14 3.0 0.4 29.45 29 40 282 355 000 81 90 96 1 0 -1 000 39 22 15 2.7 0.6 29.46 29 41 279 351 000 85 94102 1 0 -1 007 40 22 16 2.8 0.4 29.47 27 37 278 350 -001 82 92103 1 0 -1 002 41 22 17 2.6 0.7 29.48 27 37 274 346 000 87 95104 1 0 -1 010 42 22 18 2.2 1.1 29.48 25 34 276 348 003 92 95103 0 0 -1 022 43 22 19 2.6 0.8 29.49 24 32 275 348 -001 87 94 78 1 0 -1 007 44 22 20 2.7 0.5 29.50 25 33 270 343 001 84 92 79 1 0 -1 000 45 22 21 2.7 0.2 29.51 23 32 266 339 001 82 90 87 1 0 -1 000 46 22 22 2.5 0.3 29.52 23 32 262 334 001 84 92 95 0 0 -1 001 47 22 23 2.7 0.3 29.53 22 30 264 336 001 83 91 86 1 0 -1 001 48 23 00 2.8 -0.5 29.55 22 29 261 334 000 77 84 78 1 0 -1 000 49 23 01 2.8 -0.5 29.56 22 29 259 331 -001 77 83 87 1 0 -1 000 50 23 02 2.6 -0.7 29.58 20 27 254 326 000 77 83 73 1 0 -1 000 51 23 03 2.5 -0.7 29.60 20 27 255 328 001 77 84 84 0 0 -1 000 52 23 04 2.4 -0.4 29.61 22 29 253 325 000 80 89 97 0 0 -2 000 53 23 05 2.3 -0.8 29.63 21 27 245 318 000 78 83 98 0 0 -1 000 54 23 06 2.0 -0.1 29.65 20 27 255 328 000 85 80 96 0 0 -1 001 55 23 07 2.3 0.3 29.66 19 25 260 333 000 85 94 89 0 0 -1 002 56 23 08 2.5 -0.6 29.67 19 26 246 319 000 78 85 88 0 0 -1 000 57 23 09 2.1 0.2 29.68 18 23 242 315 000 86 84 96 0 0 -1 000 58 23 10 2.1 0.3 29.69 16 22 247 320 000 87 85 96 0 0 -1 003 59 23 11 2.7 -0.5 29.70 16 23 249 322 000 77 83 77 1 0 -1 000 60 23 12 2.7 -0.3 29.71 16 22 251 323 000 79 85 78 1 0 -1 000 61 23 13 2.7 0.0 29.71 17 23 256 328 000 81 87 77 1 0 -1 000 62 23 14 2.4 -0.2 29.72 17 23 251 324 000 81 88 88 0 0 -1 000 63 23 15 2.3 -0.3 29.72 15 22 250 323 000 82 81 87 0 0 -1 000 64 23 16 2.7 -0.5 29.73 14 19 260 333 000 76 84 78 1 0 -1 000 65 23 17 2.7 -0.4 29.72 13 18 264 336 000 78 80 84 1 0 -1 000 66 23 18 2.6 -0.3 29.73 12 17 269 342 000 79 81 91 1 0 -1 000 67 23 19 2.5 0.2 29.73 12 17 280 353 001 83 90 96 0 0 -1 000 68 23 20 2.3 0.4 29.72 14 19 284 356 000 86 92102 0 0 -1 001 69 23 21 1.8 0.9 29.71 14 19 279 352 000 93 91104 0 0 -1 009 70 23 22 1.8 0.7 29.70 13 17 289 2 000 92 94101 0 0 -1 007 71 23 23 1.9 0.8 29.70 13 18 303 15 000 92 93101 0 0 -1 003 72 24 00 1.9 0.8 29.70 14 18 312 24 001 92 91 95 0 0 -1 001 73 24 01 1.9 0.6 29.69 14 19 325 37 000 90 90 94 0 0 -1 001 74 24 02 2.0 0.7 29.69 15 20 334 46 001 91 98104 0 0 -1 002 75 24 03 2.2 1.2 29.69 16 20 333 45 001 93100103 0 0 -1 001 76 24 04 2.8 1.7 29.67 14 17 317 30 003 92 97103 1 0 0 000 77 24 05 3.0 2.0 29.65 14 19 297 10 -001 93 96104 1 0 0 000 78 24 06 2.8 1.9 29.64 16 22 303 16 000 93 97103 1 0 0 002 79 24 07 2.7 2.0 29.62 17 23 313 25 -003 95100 99 1 0 0 027 80 24 08 2.3 1.9 29.58 18 25 317 29 -006 97100101 1 0 0 074 81 24 09 2.2 1.8 29.56 19 28 321 33 -005 98100101 0 0 0 149 82 24 10 3.0 2.4 29.51 20 32 322 34 -007 96100100 1 1 0 145 83 24 11 3.6 3.2 29.45 23 37 310 23 -003 97100100 2 2 1 137 84 24 12 4.1 3.8 29.41 25 42 298 10 -004 98100100 3 2 2 136 85 24 13 4.3 4.0 29.39 27 45 294 7 -010 98100100 3 3 2 147 86 24 14 4.5 4.2 29.36 27 44 288 0 -004 99100100 4 3 2 065 87 24 15 4.5 4.4 29.34 27 44 282 354 -005 100100100 4 3 3 005 88 24 16 4.5 4.3 29.34 26 44 280 352 -004 100100100 4 3 3 002 89 24 17 4.4 4.3 29.34 27 45 276 349 -004 100100100 4 3 2 001 90 24 18 4.3 4.2 29.34 25 42 273 345 -003 100100100 4 3 2 000 91 24 19 4.2 4.1 29.35 26 43 273 345 -001 100100100 3 3 2 000 92 24 20 4.1 3.9 29.36 26 42 269 342 -003 100100100 3 2 1 000 93 24 21 3.7 3.5 29.36 26 39 265 338 -003 100100 86 2 1 0 001 94 24 22 2.9 2.8 29.38 27 38 263 335 -002 100100 64 1 0 0 001 95 24 23 2.5 2.2 29.40 27 37 260 332 -002 98100 52 1 0 0 003 96 25 00 2.6 1.6 29.42 27 38 259 332 -002 92100 76 1 0 -1 002 97 25 01 2.9 1.1 29.43 27 38 260 333 -003 87 98 77 1 0 -1 003 98 25 02 2.8 0.9 29.45 27 38 258 331 -003 87 99 88 1 0 -1 001 99 25 03 3.0 0.5 29.46 27 37 257 329 -004 82 92104 1 0 -1 001 100 25 04 2.8 0.4 29.47 26 35 255 328 -001 82 92104 1 0 -1 002 101 25 05 3.1 0.3 29.49 24 34 259 331 -002 80 86104 1 0 0 005 102 25 06 3.1 0.5 29.50 23 32 255 328 000 81 90104 1 0 0 002 103 25 07 3.1 0.8 29.52 21 30 255 327 001 83 91103 1 0 0 001 104 25 08 3.1 0.9 29.55 21 30 258 330 002 84 91101 1 0 0 000 105 25 09 3.2 1.0 29.56 21 29 255 327 001 84 91 85 1 0 0 000 106 25 10 3.1 1.0 29.58 20 29 252 324 000 84 92 91 1 0 0 000 107 25 11 3.2 1.1 29.60 19 27 253 326 000 85 93 90 1 0 0 000 108 25 12 3.1 1.1 29.62 18 25 252 325 000 85 93 86 1 0 0 000 109 25 13 3.0 1.1 29.64 17 24 253 325 000 86 92 93 1 0 0 000 110 25 14 3.0 0.9 29.64 16 23 251 324 -001 85 88 94 1 0 0 000 111 25 15 3.0 0.9 29.66 16 22 248 321 -001 84 86 92 1 0 0 000 112 25 16 3.0 1.1 29.67 14 20 250 323 -002 86 83 90 1 0 0 000 113 25 17 2.9 1.1 29.68 14 19 248 320 -001 87 89 90 1 0 0 000 114 25 18 2.8 0.9 29.70 16 21 242 315 -001 86 94 91 1 0 -1 000 115 25 19 2.7 0.6 29.71 15 20 239 312 000 84 74 82 1 0 0 000 116 25 20 2.7 0.5 29.72 14 19 242 315 001 84 69 80 1 0 0 000 117 25 21 2.7 0.3 29.74 14 19 242 315 000 83 83 84 1 0 0 000 118 25 22 2.7 0.7 29.76 14 18 239 312 000 85 94 80 1 0 -1 000 119 25 23 2.7 0.6 29.79 13 18 234 306 000 84 90 86 1 0 -1 000 120 26 00 2.6 0.4 29.81 12 16 228 301 002 84 82 81 1 0 -1 000 * 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.