USAP Roosevelt Island (ARI) site lat/lon = (-79.3633,-161.6268) cell lat/lon = (-79.3634,-161.6464) Forecast initialized at 2026-04-30/00 UTC MPAS cell scale: 2.4 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 00 -28.4 -32.4 28.62 17 28 318 157 000 91 86 84 -26-26-26 000 1 30 01 -29.4 -31.6 28.66 16 24 315 153 000 110 86 84 -27-26-26 000 2 30 02 -31.2 -32.4 28.69 13 23 322 160 001 126 82 86 -26-25-26 000 3 30 03 -33.2 -33.8 28.73 11 21 331 169 000 136 82 83 -26-26-26 000 4 30 04 -33.4 -34.0 28.74 12 21 332 171 000 137 82 80 -27-26-26 000 5 30 05 -33.7 -34.3 28.77 12 21 341 179 000 138 78 79 -27-26-26 000 6 30 06 -33.9 -34.5 28.80 12 20 347 185 001 138 71 77 -28-26-26 000 7 30 07 -33.9 -34.5 28.79 12 20 352 190 000 138 72 75 -28-27-27 000 8 30 08 -34.1 -34.7 28.81 11 20 358 196 -001 138 72 71 -29-27-27 000 9 30 09 -34.2 -34.8 28.85 11 20 4 202 002 138 70 69 -29-28-27 000 10 30 10 -34.4 -35.0 28.86 10 18 6 205 003 138 68 69 -29-28-27 000 11 30 11 -34.6 -35.2 28.87 10 16 21 219 002 138 62 72 -29-27-26 000 12 30 12 -34.7 -35.3 28.87 10 15 29 227 004 138 57 68 -28-27-26 000 13 30 13 -35.0 -35.6 28.88 9 13 42 241 000 138 56 61 -28-27-26 000 14 30 14 -35.0 -35.6 28.89 9 13 63 261 -001 138 55 58 -28-27-26 000 15 30 15 -34.6 -35.3 28.90 11 15 84 282 001 135 57 55 -28-27-27 000 16 30 16 -34.3 -34.9 28.89 11 18 99 297 000 138 62 49 -28-27-27 000 17 30 17 -34.1 -35.2 28.87 14 24 97 295 -002 130 65 44 -28-27-26 000 18 30 18 -34.4 -36.0 28.86 13 23 94 293 000 122 61 40 -28-27-26 000 19 30 19 -34.1 -35.7 28.85 15 25 102 301 002 122 59 35 -27-27-25 000 20 30 20 -32.6 -34.8 28.83 18 31 103 301 003 112 48 32 -27-26-24 000 21 30 21 -32.0 -35.1 28.82 19 33 105 303 -001 101 41 27 -27-25-23 000 22 30 22 -31.6 -35.7 28.79 21 35 108 307 -003 90 36 25 -26-24-22 000 23 30 23 -31.2 -35.7 28.78 22 36 107 305 -002 83 32 24 -26-23-22 000 24 01 00 -31.0 -35.6 28.77 23 39 103 302 -005 83 35 23 -25-23-22 000 25 01 01 -30.7 -35.4 28.76 25 39 106 305 -006 82 31 44 -24-22-21 000 26 01 02 -30.5 -35.2 28.75 24 38 109 307 -010 81 26 90 -23-21-21 000 27 01 03 -29.8 -34.7 28.74 23 36 112 310 -009 80 36 83 -21-20-20 000 28 01 04 -30.4 -35.1 28.73 20 29 112 311 -008 82118 90 -19-20-20 000 29 01 05 -30.0 -33.8 28.72 16 25 110 308 -004 91109 81 -19-19-20 000 30 01 06 -28.4 -30.5 28.72 13 22 104 303 -003 110109 86 -19-20-19 000 31 01 07 -27.4 -28.0 28.71 13 22 101 299 001 130103 84 -18-19-20 000 32 01 08 -26.9 -27.4 28.69 13 22 103 302 002 129 96 84 -18-20-20 000 33 01 09 -26.8 -27.3 28.69 12 21 115 313 000 129 99 87 -18-19-20 000 34 01 10 -25.4 -25.9 28.68 13 22 120 319 000 127100 92 -18-19-20 000 35 01 11 -25.5 -30.0 28.67 15 26 127 325 000 80104 83 -19-19-20 000 36 01 12 -25.6 -32.5 28.66 17 30 125 324 -002 59 94 84 -19-18-18 000 37 01 13 -24.0 -31.8 28.63 19 33 130 328 000 53 24 74 -18-18-18 000 38 01 14 -23.7 -31.8 28.61 21 36 133 332 -004 51 16 58 -19-18-18 000 39 01 15 -23.5 -31.6 28.58 23 39 137 336 -004 51 16 56 -19-18-18 000 40 01 16 -24.0 -31.9 28.56 24 40 140 338 -002 52 16 60 -18-18-18 000 41 01 17 -24.7 -32.3 28.54 25 41 143 342 -004 55 16 62 -18-18-17 000 42 01 18 -25.2 -32.2 28.52 24 41 145 343 -004 59 14 80 -18-17-17 000 43 01 19 -25.2 -32.2 28.51 24 38 146 345 -003 59 13 71 -17-17-17 000 44 01 20 -25.1 -31.8 28.50 22 35 149 348 -002 61 13 92 -17-17-17 000 45 01 21 -25.1 -31.6 28.49 21 34 153 351 -004 62 12 70 -17-17-16 000 46 01 22 -25.0 -31.8 28.49 20 33 158 356 001 61 10 68 -16-16-15 000 47 01 23 -25.3 -32.1 28.49 17 31 160 358 001 60 9 61 -16-15-15 000 48 02 00 -25.4 -32.7 28.48 16 30 158 357 001 57 17 56 -15-14-14 000 49 02 01 -25.7 -33.2 28.47 16 29 161 359 001 55 15 56 -14-14-14 000 50 02 02 -26.0 -33.3 28.46 16 29 163 1 000 56 7 54 -14-13-13 000 51 02 03 -26.9 -33.3 28.46 15 29 166 4 -001 64 6 46 -14-12-13 000 52 02 04 -26.7 -33.1 28.46 15 28 164 2 -001 64 12 44 -13-12-13 000 53 02 05 -26.0 -31.7 28.45 14 27 161 359 000 69 23 43 -13-12-12 000 54 02 06 -25.0 -29.6 28.45 13 24 158 356 -002 78 38 42 -12-12-13 000 55 02 07 -23.9 -27.4 28.46 13 24 155 353 001 88 44 45 -12-12-12 000 56 02 08 -23.0 -26.0 28.46 12 22 151 350 001 92 49 45 -13-12-12 000 57 02 09 -22.0 -25.2 28.46 11 20 145 343 000 89 51 54 -12-11-11 000 58 02 10 -21.4 -24.1 28.46 11 17 137 335 000 92 54 57 -12-11-12 000 59 02 11 -21.1 -23.4 28.47 10 15 135 333 000 95 54 63 -12-11-12 000 60 02 12 -20.7 -22.8 28.47 11 14 141 339 000 96 50 65 -11-11-11 000 61 02 13 -20.6 -22.3 28.47 11 15 140 338 005 102 49 60 -10-10-11 000 62 02 14 -20.2 -21.8 28.48 11 16 132 330 004 104 61 60 -11-10-11 000 63 02 15 -19.7 -21.4 28.48 11 18 130 329 000 103 57 64 -11-10-10 000 64 02 16 -20.4 -22.5 28.50 10 17 115 313 -003 99 66 70 -12-11-10 000 65 02 17 -20.4 -22.6 28.50 10 15 118 317 002 97 50 76 -10-10-10 000 66 02 18 -17.3 -19.7 28.50 7 9 93 292 -002 91 56 83 -9 -9-10 000 67 02 19 -17.6 -19.6 28.51 8 9 102 301 000 95 62 84 -9 -9-10 000 68 02 20 -17.6 -19.0 28.51 5 5 130 329 -004 101 57 72 -9 -9-10 000 69 02 21 -17.4 -18.6 28.51 3 3 111 310 002 103 64 74 -11-10-11 000 70 02 22 -16.7 -18.6 28.51 2 4 154 352 -002 95 67 76 -10-11-11 000 71 02 23 -17.0 -18.5 28.52 2 6 116 314 000 98 69 79 -10-11-12 000 72 03 00 -16.7 -18.4 28.52 0 5 7 206 -001 97 66 78 -11-11-12 000 73 03 01 -16.5 -17.8 28.50 5 8 277 116 -002 102 69 77 -10-11-12 000 74 03 02 -19.2 -19.3 28.49 9 12 270 109 000 116 61 77 -10-10-11 000 75 03 03 -18.8 -19.2 28.47 11 15 271 109 -001 118 53 68 -10-10-10 000 76 03 04 -19.2 -19.6 28.46 11 18 254 93 -005 119 67 68 -12-11-10 000 77 03 05 -20.0 -20.5 28.46 10 15 235 73 -005 120 77 65 -12-11-11 000 78 03 06 -19.8 -20.3 28.45 9 13 247 85 -004 119 84 57 -12-11-11 000 79 03 07 -19.1 -19.6 28.44 10 14 260 98 000 118 85 56 -12-11-11 000 80 03 08 -18.5 -18.9 28.44 11 15 259 97 001 118 81 62 -12-12-11 000 * 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.