UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025042612.upa.cvt Date: 1200Z 26 APR 25 Searching for KIAD... Searching the city database file for: KIAD ... Date:1200Z 26 APR 25 Station: KIAD WMO ident: 72403 Latitude: 38.95 Longitude: -77.45 Elevation: 98.00 ------------------------------------------------------------------------------- LEV PRES HGHT TEMP DEWP RH DD WETB DIR SPD THETA THE-V THE-W THE-E W mb m C C % C C deg knt K K K K g/kg ------------------------------------------------------------------------------- SFC 1002 98 19.0 17.5 91 1.5 18.0 200 6 292.0 294.2 291.1 327.8 12.65 1 1000 101 18.8 17.3 91 1.5 17.8 195 11 292.0 294.2 291.0 327.4 12.52 2 979 283 17.4 17.0 97 0.4 17.1 217 22 292.3 294.6 291.1 327.9 12.54 3 963 425 17.0 16.1 94 0.9 16.4 224 27 293.3 295.4 291.0 327.6 12.03 4 957 478 17.4 15.1 86 2.3 15.9 226 28 294.2 296.3 290.7 326.7 11.34 5 953 514 18.6 13.6 73 5.0 15.4 227 29 295.8 297.7 290.5 325.6 10.32 6 925 770 16.8 12.2 74 4.6 13.9 235 31 296.5 298.2 290.2 324.6 9.69 7 886 1136 14.0 10.7 80 3.3 12.0 247 36 297.3 298.9 289.9 323.9 9.15 8 850 1485 12.2 8.3 77 3.9 9.9 255 35 298.9 300.4 289.6 322.7 8.11 9 849 1495 12.2 8.4 78 3.8 10.0 255 35 299.0 300.5 289.7 323.0 8.17 10 779 2211 7.0 6.1 94 0.9 6.5 250 33 300.9 302.3 289.8 323.4 7.60 11 775 2253 6.8 5.7 93 1.1 6.2 250 34 301.1 302.5 289.8 323.2 7.43 12 746 2566 5.4 3.1 85 2.3 4.2 248 40 302.9 304.1 289.4 322.2 6.42 13 733 2710 4.4 2.8 89 1.6 3.5 246 41 303.3 304.5 289.5 322.6 6.40 14 700 3084 1.2 0.9 98 0.3 1.0 245 43 303.8 304.9 289.2 321.5 5.84 15 691 3188 0.2 0.2 100 0.0 0.2 244 43 303.8 304.9 289.0 320.9 5.62 16 675 3376 -0.3 -0.3 100 0.0 -0.3 243 43 305.3 306.3 289.4 322.2 5.55 17 670 3435 0.0 -0.2 99 0.2 -0.1 242 44 306.3 307.3 289.8 323.5 5.63 18 625 3990 -2.7 -2.7 100 0.0 -2.7 235 41 309.4 310.3 290.3 325.0 5.02 19 618 4080 -2.9 -3.5 96 0.6 -3.2 233 41 310.1 311.0 290.3 325.1 4.78 20 608 4209 -3.7 -5.2 89 1.5 -4.4 231 40 310.7 311.5 290.0 324.1 4.27 21 557 4897 -7.7 -10.1 83 2.4 -8.7 225 36 313.8 314.4 290.0 324.1 3.19 22 515 5503 -11.1 -11.8 95 0.7 -11.3 234 40 316.8 317.4 290.7 326.6 3.01 23 500 5730 -12.5 -13.6 91 1.1 -12.9 240 45 317.8 318.3 290.7 326.6 2.68 24 492 5853 -13.1 -14.2 91 1.1 -13.5 240 46 318.5 319.0 290.9 327.1 2.59 25 400 7400 -24.1 -26.6 80 2.5 -24.6 240 39 323.7 323.9 291.0 327.5 1.09 26 385 7678 -26.1 -29.0 77 2.9 -26.6 241 36 324.6 324.8 291.1 327.8 0.90 27 322 8944 -36.7 -40.3 69 3.6 -37.1 245 40 327.0 327.0 291.2 328.3 0.35 28 308 9250 -39.3 -42.8 69 3.5 -39.6 243 42 327.5 327.6 291.3 328.6 0.28 29 304 9340 -40.3 -43.9 68 3.6 -40.6 242 42 327.3 327.4 291.2 328.3 0.26 30 300 9430 -40.9 -44.3 70 3.4 -41.2 240 43 327.7 327.8 291.3 328.7 0.25 31 297 9498 -41.5 -44.8 70 3.3 -41.8 240 43 327.8 327.9 291.3 328.7 0.24 32 281 9867 -44.9 -49.4 61 4.5 -45.2 240 44 328.2 328.2 291.3 328.7 0.15 33 276 9986 -46.1 -49.6 68 3.5 -46.3 240 44 328.1 328.1 291.3 328.7 0.15 34 269 10155 -47.7 -52.2 60 4.5 -47.9 240 45 328.2 328.2 291.3 328.7 0.11 35 267 10204 -48.1 -52.6 60 4.5 -48.3 240 45 328.3 328.3 291.3 328.8 0.11 36 254 10528 -51.3 -55.7 59 4.4 -51.4 240 46 328.3 328.3 291.3 328.6 0.08 37 250 10630 -52.1 -56.2 61 4.1 -52.2 240 46 328.6 328.6 291.4 328.9 0.08 38 247 10708 -52.9 -56.8 62 3.9 -53.0 240 48 328.6 328.6 291.4 328.8 0.07 39 238 10948 -54.9 -58.5 64 3.6 -55.0 242 51 329.0 329.1 291.5 329.3 0.06 40 235 11029 -55.7 -60.4 56 4.7 -55.8 243 51 329.0 329.0 291.5 329.2 0.05 41 223 11362 -58.7 -62.5 61 3.8 -58.7 246 54 329.4 329.4 291.6 329.5 0.04 42 212 11679 -61.1 -64.0 68 2.9 -61.2 248 57 330.5 330.5 291.9 330.6 0.03 43 207 11827 -62.1 -66.7 54 4.6 -62.1 250 59 331.1 331.1 292.0 331.2 0.02 44 206 11858 -62.4 -66.8 55 4.4 -62.4 250 59 331.2 331.2 292.0 331.3 0.02 45 200 12040 -63.9 -67.3 63 3.4 -63.9 250 57 331.6 331.6 292.2 331.7 0.02 46 197 12132 -64.9 -69.1 56 4.2 -65.0 250 58 331.4 331.4 292.1 331.5 0.02 47 187 12446 -67.5 -71.6 56 4.1 -67.5 255 53 332.2 332.2 292.3 332.2 0.01 48 184 12543 -67.3 -71.6 54 4.3 -67.3 254 52 334.1 334.1 292.8 334.1 0.01 49 183 12576 -67.3 -72.1 50 4.8 -67.3 254 50 334.6 334.6 293.0 334.6 0.01 50 181 12642 -64.7 -76.7 18 12.0 -64.8 253 46 339.9 339.9 294.3 339.9 0.01 51 177 12779 -62.9 -79.9 8 17.0 -63.0 250 38 345.0 345.0 295.5 345.0 0.00 52 161 13357 -64.9 -81.9 8 17.0 -65.0 255 48 351.1 351.1 296.9 351.1 0.00 53 159 13434 -63.3 -82.3 6 19.0 -63.4 255 48 355.1 355.1 297.7 355.1 0.00 54 152 13709 -63.9 -82.9 6 19.0 -64.0 259 41 358.6 358.6 298.4 358.7 0.00 55 150 13790 -63.1 -84.1 4 21.0 -63.2 260 39 361.4 361.4 299.0 361.4 0.00 56 145 13999 -62.5 -83.5 4 21.0 -62.6 251 34 365.9 365.9 299.8 366.0 0.00 57 144 14042 -62.7 -83.7 4 21.0 -62.9 251 34 366.3 366.3 299.9 366.3 0.00 58 133 14532 -62.5 -85.5 3 23.0 -62.7 263 39 375.1 375.1 301.4 375.1 0.00 59 126 14867 -60.7 -85.7 2 25.0 -60.9 269 33 384.2 384.2 302.9 384.2 0.00 60 100 16300 -62.5 -86.5 3 24.0 -62.7 285 36 407.0 407.0 306.1 407.0 0.00 61 95 16618 -60.1 -86.1 2 26.0 -60.4 285 45 417.7 417.7 307.4 417.7 0.00 62 88 17092 -62.3 -87.3 2 25.0 -62.6 298 37 422.5 422.5 308.0 422.5 0.00 63 72 18335 -60.7 -86.7 2 26.0 -61.1 322 24 450.9 450.9 311.0 450.9 0.00 64 70 18510 -61.1 -87.1 2 26.0 -61.4 350 11 453.7 453.7 311.2 453.7 0.00 65 64 19064 -62.9 -87.9 2 25.0 -63.2 322 10 461.5 461.5 311.9 461.5 0.00 66 60 19465 -59.7 -86.7 2 27.0 -60.2 278 15 477.2 477.2 313.2 477.3 0.00 67 56 19894 -61.7 -87.7 2 26.0 -62.1 313 20 482.2 482.2 313.6 482.2 0.00 68 50 20600 -59.3 -87.3 1 28.0 -59.9 355 15 503.7 503.7 315.2 503.8 0.00 69 49 20726 -60.3 -87.3 2 27.0 -60.9 358 14 504.3 504.3 315.2 504.3 0.00 70 46 21122 -58.1 -87.1 1 29.0 -58.9 22 8 518.8 518.8 316.2 518.8 0.00 71 44 21402 -59.1 -87.1 1 28.0 -59.8 55 4 523.0 523.0 316.5 523.0 0.00 72 40 22001 -57.7 -86.7 1 29.0 -58.6 9 8 541.0 541.0 317.6 541.0 0.01 73 38 22324 -59.1 -87.1 1 28.0 -59.9 354 10 545.4 545.4 317.8 545.4 0.01 74 31 23611 -55.5 -85.5 1 30.0 -57.0 36 6 587.8 587.8 320.0 587.9 0.01 75 30 23820 -55.9 -85.9 1 30.0 -57.3 40 5 592.2 592.3 320.3 592.3 0.01 76 28 24257 -56.5 -86.5 1 30.0 -57.9 91 3 602.4 602.4 320.7 602.4 0.01 77 25 24979 -54.1 -85.1 1 31.0 -56.1 1 2 629.1 629.1 321.9 629.2 0.01 78 23 25512 -54.7 -85.7 1 31.0 -56.8 3 7 642.5 642.5 322.4 642.6 0.01 79 20 26410 -52.3 -85.3 1 33.0 -55.1 75 10 676.1 676.1 323.6 676.2 0.01 80 15 28284 -50.3 -84.3 1 34.0 -54.4 288 8 740.7 740.7 325.7 740.9 0.02 81 14 28735 -50.7 -83.7 1 33.0 -54.9 312 10 754.1 754.1 326.1 754.3 0.03 82 14 28735 -48.7 -83.7 1 35.0 -53.6 312 10 760.9 760.9 326.3 761.1 0.03 83 13 29222 -49.3 -83.3 1 34.0 -54.2 320 10 775.1 775.1 326.6 775.4 0.03 84 12 29749 -48.1 -84.1 1 36.0 -53.8 333 9 797.3 797.3 327.2 797.6 0.03 85 10 30960 -45.5 -82.5 1 37.0 -52.9 20 5 849.7 849.7 328.4 850.1 0.04 86 9.5 31302 -45.5 -83.5 1 38.0 -53.2 862.3 862.3 328.7 862.6 0.04 87 8.8 31814 -43.7 -82.7 1 39.0 -52.6 888.3 888.3 329.2 888.8 0.05 TRP 187 12446 -67.5 -71.6 56 4.1 -67.5 255 53 332.2 332.2 292.3 332.2 0.01 WND 206 11858 -62.4 -66.8 55 4.4 -62.4 250 59 331.2 331.2 292.0 331.3 0.02 Sounding variables and indices 1000-500 mb thick: 5629.00 m Freezing level: 684.60 mb = 3263.18 m = 10705.84 ft Freezing level: 670.00 mb = 3435.47 m = 11271.09 ft Freezing level: 670.00 mb = 3435.47 m = 11271.09 ft Wetbulb zero: 685.07 mb = 3257.19 m = 10686.18 ft Precipitable water: 1.49 inches Sfc-500 mean rel hum: 88.84 % Est. max temperature: 25.85 C = 78.54 F Sfc-Lift cond lev (LCL): 980.31 mb = 271.90 m = 892.05 ft T: 17.49 C 700-500 lapse rate: 5.18 C/km ThetaE index: 5.16 C Layer 963.0- 849.0 mb Conv cond level (CCL): 866.31 mb = 1324.93 m = 4346.83 ft Mean mixing ratio: 10.94 g/kg Conv temperature: 25.19 C = 77.34 F Cap Strength: 2.02 C Lifted Index: 0.66 C Risk: Showers probable Lifted Index @300 mb: 1.91 C Lifted Index @700 mb: -1.69 C Showalter Index: 2.42 C Risk: Showers probable Total Totals Index: 45.50 C Risk: Scattered moderate thunderstorms Vertical Totals Index: 24.70 C Cross Totals Index: 20.80 C K Index: 32.70 Risk: 60-80 % chance of thunderstorms Sweat Index: 214.60 Risk: None Energy Index: 0.72 Risk: None Parcel Indices Parcel: using 100 mb layer CAPE (B+): 88.33 J/kg Max Up Vert Vel: 13.29 m/s Conv Inhibition (B-): 60.12 J/kg Cap Strength: 2.02 C Lift Cond Lev (LCL): 911.48 mb = 894.96 m = 2936.18 ft Lev Free Conv (LFC): 796.48 mb = 2026.06 m = 6647.10 ft Equ Level (EL): 556.48 mb = 4903.67 m = 16087.97 ft B at Equ Level: 88.27 J/kg Max Parcel Lev (MPL): 386.48 mb = 7649.90 m = 25097.78 ft Wind level data Storm motion: 269 at 28 knt ---------------------------------------------------------- TRUE/GROUND REL | STORM REL LEV P H DIR SPD U V | DIR SPD U V mb m knt m/s | knt m/s ---------------------------------------------------------- 0 1002 98 200 6 2.1 5.6 | 101 26 -25.7 5.2 1 1000 101 195 11 2.8 10.6 | 112 27 -24.9 10.1 2 977 305 220 23 14.8 17.6 | 143 22 -13.0 17.1 3 942 610 230 32 24.5 20.6 | 171 20 -3.3 20.1 4 925 770 235 31 25.4 17.8 | 172 17 -2.4 17.3 5 909 914 240 32 27.7 16.0 | 180 16 -0.1 15.5 6 877 1219 250 38 35.7 13.0 | 212 15 7.9 12.5 7 850 1485 255 35 33.8 9.1 | 215 10 6.0 8.6 8 815 1829 255 31 29.9 8.0 | 196 8 2.1 7.5 9 786 2134 250 31 29.1 10.6 | 188 10 1.3 10.1 10 757 2438 250 38 35.7 13.0 | 212 15 7.9 12.5 11 730 2743 245 42 38.1 17.7 | 211 20 10.3 17.3 12 703 3048 240 45 39.0 22.5 | 207 25 11.2 22.0 13 700 3084 245 43 39.0 18.2 | 212 21 11.2 17.7 14 651 3658 240 44 38.1 22.0 | 206 24 10.3 21.5 15 602 4267 230 39 29.9 25.1 | 185 25 2.1 24.6 16 557 4877 225 36 25.5 25.5 | 175 25 -2.3 25.0 17 536 5182 225 33 23.3 23.3 | 169 23 -4.5 22.9 18 500 5730 240 45 39.0 22.5 | 207 25 11.2 22.0 19 496 5791 240 46 39.8 23.0 | 208 26 12.0 22.5 20 476 6096 240 44 38.1 22.0 | 206 24 10.3 21.5 21 439 6706 250 40 37.6 13.7 | 217 16 9.8 13.2 22 400 7400 240 39 33.8 19.5 | 197 20 6.0 19.0 23 388 7620 240 36 31.2 18.0 | 191 18 3.4 17.5 24 371 7925 245 35 31.7 14.8 | 195 15 3.9 14.3 25 312 9144 245 41 37.2 17.3 | 209 19 9.4 16.8 26 300 9430 240 43 37.2 21.5 | 204 23 9.4 21.0 27 250 10630 240 46 39.8 23.0 | 208 26 12.0 22.5 28 249 10668 240 48 41.6 24.0 | 210 27 13.8 23.5 29 206 11858 250 59 55.4 20.2 | 235 34 27.6 19.7 30 200 12040 250 57 53.6 19.5 | 234 32 25.8 19.0 31 195 12192 250 59 55.4 20.2 | 235 34 27.6 19.7 32 187 12446 255 53 51.2 13.7 | 241 27 23.4 13.2 33 185 12497 255 55 53.1 14.2 | 242 29 25.3 13.8 34 176 12802 250 37 34.8 12.7 | 210 14 7.0 12.2 35 160 13411 255 49 47.3 12.7 | 238 23 19.5 12.2 36 150 13790 260 39 38.4 6.8 | 239 12 10.6 6.3 37 145 14021 250 33 31.0 11.3 | 197 11 3.2 10.8 38 138 14326 260 43 42.3 7.5 | 244 16 14.6 7.0 39 119 15240 275 26 25.9 -2.3 | 35 3 -1.9 -2.7 40 113 15545 280 25 24.6 -4.3 | 33 6 -3.2 -4.8 41 108 15850 265 29 28.9 2.5 | 208 2 1.1 2.0 42 100 16300 285 36 34.8 -9.3 | 325 12 7.0 -9.8 43 97 16459 275 46 45.8 -4.0 | 284 19 18.0 -4.5 44 93 16764 295 45 40.8 -19.0 | 326 23 13.0 -19.5 45 84 17374 300 31 26.8 -15.5 | 3 16 -0.9 -16.0 46 76 17983 305 40 32.8 -22.9 | 348 24 5.0 -23.4 47 73 18288 315 27 19.1 -19.1 | 24 21 -8.7 -19.6 48 70 18510 350 11 1.9 -10.8 | 66 28 -25.9 -11.3 49 66 18898 355 10 0.9 -10.0 | 69 29 -26.9 -10.4 50 63 19202 295 10 9.1 -4.2 | 76 19 -18.7 -4.7 51 60 19507 275 16 15.9 -1.4 | 81 12 -11.9 -1.9 52 57 19812 310 19 14.6 -12.2 | 46 18 -13.2 -12.7 53 54 20117 320 22 14.1 -16.9 | 38 22 -13.7 -17.3 54 51 20422 295 20 18.1 -8.5 | 47 13 -9.7 -8.9 55 50 20600 355 15 1.3 -14.9 | 60 31 -26.5 -15.4 56 47 21031 5 10 -0.9 -10.0 | 70 31 -28.7 -10.4 57 44 21336 60 3 -2.6 -1.5 | 86 30 -30.4 -2.0 58 38 22250 350 10 1.7 -9.8 | 68 28 -26.1 -10.3 59 35 22860 20 10 -3.4 -9.4 | 72 33 -31.2 -9.9 60 30 23820 40 5 -3.2 -3.8 | 82 31 -31.0 -4.3 61 27 24384 105 3 -2.9 0.8 | 91 31 -30.7 0.3 62 26 24689 0 0 -0.0 -0.0 | 89 28 -27.8 -0.5 63 22 25908 5 10 -0.9 -10.0 | 70 31 -28.7 -10.4 64 21 26213 30 14 -7.0 -12.1 | 70 37 -34.8 -12.6 65 20 26410 75 10 -9.7 -2.6 | 85 38 -37.5 -3.1 66 20 26518 35 15 -8.6 -12.3 | 71 39 -36.4 -12.8 67 19 26822 60 12 -10.4 -6.0 | 80 39 -38.2 -6.5 68 18 27127 80 11 -10.8 -1.9 | 86 39 -38.6 -2.4 69 17 27432 75 6 -5.8 -1.6 | 87 34 -33.6 -2.0 70 16 28042 0 0 -0.0 -0.0 | 89 28 -27.8 -0.5 71 15 28346 275 10 10.0 -0.9 | 86 18 -17.8 -1.4 72 14 28651 310 10 7.7 -6.4 | 71 21 -20.1 -6.9 73 12 29566 325 10 5.7 -8.2 | 69 24 -22.1 -8.7 74 10 30960 20 5 -1.7 -4.7 | 80 30 -29.5 -5.2 Wind Parameters Mean winds (0-6000m): 239.0 at 37.1 knts Storm direction: 269.0 at 27.8 knts Shear (0-3000m) pos: 5.3 neg: 2.0 tot: 7.2 10-3/s Storm rel Dir Shear (0-3000m): 110.8 deg Storm rel helicity (0-3000m) pos: 242.2 neg: -18.9 tot: 223.3 m^2/s^2 ave: 74.4 10^-3 m/s^2 rel: 0.56 Storm rel vorticity (0-3000m) horiz: 12.4 stream: 7.0 10^-3/s Energy-Hel index: 0.12 Bulk Rich Number: 2.31 Bulk Shear: 38.25 m/s Storm Parameters ------------------------------------------------------------------------------- Depth Mean Inflow| Shear | Helicity | Vorticity AGL Dir Spd Dir Spd| Pos Neg Tot| Pos Neg Tot Ave Rel | Hor Strm m knt knt| 10^-3/s | m^2/s^2 m/s^2 | 10^-3/s ------------------------------------------------------------------------------- 500 221 23 142 21| 27.4 0.0 27.4|166.4 0.0 166.4 332.8 0.97| 29.2 28.3 1000 231 27 159 18| 16.3 0.0 16.3|200.3 0.0 200.3 200.3 0.90| 20.2 18.3 1500 239 30 174 15| 10.5 0.0 10.5|215.4 -2.1 213.4 142.2 0.81| 16.5 13.3 2000 243 31 178 13| 7.9 0.9 8.8|215.4 -9.6 205.8 102.9 0.67| 13.6 9.1 2500 245 32 184 13| 6.3 1.7 8.0|231.6 -10.2 221.4 88.6 0.65| 12.9 8.3 3000 244 34 190 14| 5.3 2.0 7.2|242.2 -18.9 223.3 74.4 0.56| 12.4 7.0 4000 243 36 195 16| 3.9 2.0 6.0|242.2 -74.7 167.5 41.9 0.38| 10.6 4.1 5000 240 36 191 18| 3.2 1.8 4.9|242.2-130.1 112.2 22.4 0.25| 9.4 2.4 6000 239 37 192 19| 3.8 1.5 5.3|341.0-138.4 202.6 33.8 0.34| 9.5 3.2 Wrote GIF file: /home/apache/climate/data/raob//KIAD/skewt/KIAD.skewt.20250426.12.gif