UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025121812.upa.cvt Date: 1200Z 18 DEC 25 Searching for KIAD... Searching the city database file for: KIAD ... Date:1200Z 18 DEC 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 1013 98 -2.3 -4.6 84 2.3 -3.1 290 4 269.9 270.3 269.4 277.1 2.68 1 1012 105 -2.5 -4.7 85 2.2 -3.3 277 5 269.7 270.2 269.2 276.9 2.66 2 1010 119 1.2 -3.6 70 4.8 -0.6 251 6 273.6 274.1 272.0 281.5 2.90 3 1008 134 3.8 -4.2 56 8.0 0.7 225 7 276.3 276.8 273.5 284.0 2.77 4 1005 156 5.2 -3.8 52 9.0 1.6 186 8 278.0 278.4 274.5 286.0 2.87 5 1000 193 5.6 -3.4 52 9.0 2.0 120 11 278.8 279.3 275.1 287.1 2.97 6 962 510 6.8 -5.2 42 12.0 2.0 130 17 283.1 283.5 277.0 290.8 2.69 7 937 726 6.4 -6.6 39 13.0 1.3 148 16 284.8 285.2 277.6 292.0 2.48 8 925 832 6.8 -7.2 36 14.0 1.3 160 17 286.3 286.7 278.3 293.3 2.40 9 922 859 6.8 -8.2 33 15.0 1.1 163 16 286.5 286.9 278.2 293.1 2.23 10 911 957 7.4 -17.6 15 25.0 -0.4 172 15 288.1 288.3 277.3 291.3 1.05 11 907 993 7.6 -14.4 19 22.0 0.1 174 16 288.7 288.9 278.1 292.9 1.38 12 903 1030 7.6 -4.4 42 12.0 2.5 176 17 289.1 289.6 280.4 298.0 3.05 13 901 1048 7.4 -2.6 49 10.0 2.9 177 18 289.0 289.7 281.0 299.2 3.50 14 899 1066 7.4 -3.6 46 11.0 2.6 177 18 289.2 289.8 280.8 298.7 3.25 15 896 1094 8.0 -10.0 27 18.0 1.2 179 19 290.1 290.5 279.6 296.1 1.99 16 893 1121 7.8 -9.2 29 17.0 1.3 180 20 290.2 290.6 279.8 296.5 2.13 17 886 1186 8.0 -21.0 11 29.0 -0.7 183 22 291.1 291.2 278.4 293.6 0.81 18 884 1205 7.8 -23.2 9 31.0 -1.0 184 23 291.0 291.2 278.2 293.1 0.67 19 880 1242 7.6 -13.4 21 21.0 0.2 185 23 291.2 291.5 279.5 295.9 1.54 20 876 1280 7.4 -17.6 15 25.0 -0.6 184 24 291.4 291.6 279.0 294.8 1.09 21 873 1308 7.0 -10.0 29 17.0 0.5 184 25 291.2 291.6 280.2 297.4 2.04 22 869 1346 7.2 -18.8 14 26.0 -0.9 183 25 291.8 292.0 279.0 294.9 1.00 23 866 1374 7.0 -8.0 33 15.0 1.0 182 26 291.9 292.3 281.0 299.1 2.41 24 861 1422 7.0 -22.0 11 29.0 -1.4 182 27 292.4 292.5 279.0 294.8 0.76 25 851 1517 6.6 -26.4 7 33.0 -2.1 180 29 293.0 293.1 278.9 294.6 0.52 26 850 1527 6.6 -26.4 7 33.0 -2.1 180 29 293.1 293.2 279.0 294.7 0.52 27 838 1643 5.6 -23.4 10 29.0 -2.5 184 29 293.2 293.3 279.3 295.4 0.69 28 832 1702 5.0 -5.0 48 10.0 0.7 186 30 293.2 293.7 282.4 302.6 3.16 29 830 1722 5.0 -3.0 56 8.0 1.4 186 30 293.4 294.0 283.1 304.3 3.69 30 825 1771 4.8 -3.2 56 8.0 1.3 188 30 293.7 294.3 283.2 304.5 3.66 31 824 1781 4.8 -4.2 52 9.0 0.9 188 30 293.8 294.4 282.9 303.8 3.40 32 820 1821 5.2 -14.8 22 20.0 -1.7 190 30 294.6 294.9 281.0 299.2 1.48 33 815 1871 4.8 -6.2 45 11.0 0.2 190 30 294.7 295.2 282.8 303.5 2.95 34 811 1911 5.0 -17.0 19 22.0 -2.2 190 30 295.3 295.5 281.0 299.2 1.24 35 795 2073 4.2 -30.8 6 35.0 -4.2 190 30 296.2 296.2 280.2 297.4 0.37 36 790 2124 4.2 -27.8 8 32.0 -4.0 190 30 296.7 296.8 280.6 298.3 0.49 37 783 2197 4.0 -11.0 33 15.0 -1.7 192 30 297.2 297.6 282.9 303.7 2.11 38 759 2449 3.2 -8.8 41 12.0 -1.6 200 28 299.0 299.5 284.2 307.0 2.59 39 754 2503 2.8 -6.2 52 9.0 -1.0 203 28 299.2 299.7 284.9 308.8 3.19 40 744 2611 2.4 -9.6 41 12.0 -2.3 208 27 299.9 300.3 284.4 307.5 2.48 41 734 2720 2.2 -9.8 41 12.0 -2.5 214 26 300.8 301.3 284.7 308.5 2.47 42 700 3101 -0.9 -6.9 64 6.0 -3.4 235 26 301.5 302.1 285.8 311.5 3.25 43 660 3567 -5.3 -7.6 84 2.3 -6.2 243 27 301.6 302.2 285.9 311.7 3.27 44 652 3663 -6.1 -8.0 86 1.9 -6.8 245 27 301.8 302.4 285.9 311.6 3.21 45 624 4006 -8.1 -9.1 92 1.0 -8.5 259 26 303.3 303.9 286.4 312.8 3.08 46 618 4081 -7.9 -10.6 81 2.7 -8.9 255 24 304.4 304.9 286.4 313.0 2.76 47 611 4169 -8.3 -11.0 81 2.7 -9.3 251 23 304.9 305.4 286.5 313.4 2.70 48 606 4233 -8.3 -15.3 57 7.0 -10.6 248 22 305.6 306.0 285.9 311.8 1.92 49 603 4272 -8.5 -16.5 52 8.0 -11.0 246 21 305.8 306.2 285.8 311.4 1.74 50 599 4324 -8.9 -15.9 57 7.0 -11.1 246 21 306.0 306.3 286.0 311.9 1.85 51 591 4428 -9.5 -16.5 57 7.0 -11.7 247 21 306.4 306.8 286.1 312.2 1.78 52 587 4480 -9.3 -24.3 28 15.0 -13.1 248 20 307.3 307.4 285.4 310.3 0.91 53 533 5219 -14.9 -26.9 35 12.0 -17.5 255 26 309.2 309.3 286.0 311.8 0.79 54 500 5700 -18.7 -34.7 23 16.0 -21.3 250 27 310.2 310.3 285.9 311.6 0.40 55 400 7320 -30.9 -38.9 45 8.0 -31.8 255 43 314.8 314.9 287.4 316.0 0.33 56 300 9290 -46.9 -60.9 19 14.0 -47.3 275 22 319.3 319.3 288.5 319.4 0.04 57 250 10480 -53.7 -70.7 11 17.0 -53.9 265 43 326.2 326.2 290.6 326.3 0.01 58 207 11674 -58.7 -74.7 11 16.0 -58.9 260 73 336.5 336.5 293.4 336.5 0.01 59 200 11890 -57.5 -73.5 11 16.0 -57.7 265 82 341.7 341.7 294.7 341.7 0.01 60 198 11954 -57.4 -73.9 11 16.5 -57.6 270 82 342.8 342.8 295.0 342.9 0.01 61 150 13740 -54.7 -84.7 1 30.0 -55.1 270 77 375.8 375.8 301.6 375.8 0.00 62 100 16260 -63.5 -88.5 2 25.0 -63.7 255 61 405.0 405.0 305.9 405.0 0.00 63 73 18168 -68.1 -89.1 3 21.0 -68.2 276 39 433.5 433.5 309.2 433.5 0.00 64 70 18420 -66.7 -88.7 3 22.0 -66.9 265 29 441.7 441.7 310.0 441.7 0.00 65 67 18684 -66.7 -89.7 3 23.0 -66.9 274 35 447.3 447.3 310.6 447.3 0.00 66 65 18868 -64.9 -88.9 2 24.0 -65.1 262 31 455.1 455.1 311.3 455.1 0.00 67 62 19155 -65.5 -89.5 2 24.0 -65.7 262 28 459.9 459.9 311.8 460.0 0.00 68 61 19254 -63.1 -89.1 2 26.0 -63.4 263 27 467.4 467.4 312.4 467.4 0.00 69 57 19672 -61.3 -89.3 1 28.0 -61.7 257 26 480.7 480.7 313.5 480.7 0.00 70 52 20238 -63.3 -89.3 2 26.0 -63.7 268 23 488.8 488.8 314.1 488.8 0.00 71 50 20480 -60.9 -88.9 1 28.0 -61.4 275 17 500.0 500.0 314.9 500.0 0.00 72 45 21136 -60.9 -88.9 1 28.0 -61.4 274 19 515.3 515.3 316.0 515.3 0.00 73 42 21564 -62.5 -89.5 1 27.0 -63.0 300 22 521.6 521.6 316.4 521.6 0.00 74 41 21713 -60.9 -88.9 1 28.0 -61.5 285 20 529.2 529.2 316.9 529.2 0.00 75 40 21866 -61.7 -89.7 1 28.0 -62.3 255 19 530.9 530.9 317.0 530.9 0.00 76 36 22520 -61.5 -89.5 1 28.0 -62.1 271 26 547.7 547.7 317.9 547.7 0.00 77 34 22876 -59.3 -89.3 1 30.0 -60.2 268 19 562.5 562.5 318.8 562.5 0.00 78 33 23064 -59.1 -89.1 1 30.0 -60.0 253 19 567.8 567.8 319.0 567.9 0.00 79 32 23256 -60.1 -89.1 1 29.0 -61.0 259 17 570.2 570.2 319.2 570.2 0.00 80 30 23660 -59.5 -88.5 1 29.0 -60.4 290 14 582.4 582.4 319.8 582.5 0.01 81 27 24316 -60.9 -89.9 1 29.0 -61.8 260 17 596.3 596.3 320.5 596.3 0.00 82 26 24552 -58.7 -88.7 1 30.0 -59.9 250 22 609.0 609.0 321.0 609.1 0.01 83 23 25313 -63.3 -90.3 1 27.0 -64.1 279 7 617.2 617.2 321.4 617.3 0.00 84 21 25871 -64.1 -91.1 1 27.0 -64.9 278 8 631.1 631.1 321.9 631.1 0.00 85 21 25871 -62.9 -90.9 1 28.0 -63.8 278 8 634.7 634.7 322.1 634.7 0.00 86 20 26170 -64.5 -90.5 2 26.0 -65.3 305 13 638.7 638.7 322.3 638.8 0.01 87 19 26483 -64.9 -90.9 2 26.0 -65.7 294 21 646.9 646.9 322.6 647.0 0.01 88 17 27166 -62.5 -90.5 1 28.0 -63.6 293 13 675.5 675.5 323.6 675.6 0.01 89 15 27938 -62.3 -90.3 1 28.0 -63.6 292 16 700.8 700.8 324.4 700.9 0.01 90 14 28362 -64.5 -91.5 1 27.0 -65.5 305 19 707.3 707.3 324.7 707.4 0.01 91 13 28817 -62.7 -90.7 1 28.0 -64.1 305 22 728.7 728.7 325.3 728.8 0.01 TRP 207 11674 -58.7 -74.7 11 16.0 -58.9 260 73 336.5 336.5 293.4 336.5 0.01 WND 198 11954 -57.4 -73.9 11 16.5 -57.6 270 82 342.8 342.8 295.0 342.9 0.01 Sounding variables and indices 1000-500 mb thick: 5507.00 m Freezing level: Surface below freezing Freezing level: 1010.65 mb = 114.77 m = 376.54 ft Freezing level: 709.87 mb = 2990.44 m = 9811.03 ft Wetbulb zero: Below ground Precipitable water: 0.45 inches Sfc-500 mean rel hum: 44.22 % Est. max temperature: 20.14 C = 68.25 F Sfc-Lift cond lev (LCL): 976.96 mb = 383.94 m = 1259.63 ft T: 6.32 C 700-500 lapse rate: 6.85 C/km ThetaE index: 3.39 C Layer 886.0- 880.0 mb Conv cond level (CCL): 553.46 mb = 4930.84 m = 16177.11 ft Mean mixing ratio: 2.60 g/kg Conv temperature: 36.44 C = 97.59 F Cap Strength: 17.42 C Lifted Index: 17.67 C Risk: None Lifted Index @300 mb: 20.87 C Lifted Index @700 mb: 14.84 C Showalter Index: 14.03 C Risk: None Total Totals Index: 17.60 C Risk: None Vertical Totals Index: 25.30 C Cross Totals Index: -7.70 C K Index: -7.10 Risk: None Sweat Index: 227.46 Risk: None Energy Index: 3.59 Risk: None Parcel Indices Parcel: using 100 mb layer CAPE (B+): 38.48 J/kg Max Up Vert Vel: 8.77 m/s Conv Inhibition (B-): 50677.34 J/kg Cap Strength: 17.65 C Lift Cond Lev (LCL): 801.81 mb = 2003.47 m = 6572.98 ft Lev Free Conv (LFC): -1.00 mb = -9999.00 m = -9999.00 ft Wind level data Storm motion: 253 at 18 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 1013 98 290 4 3.8 -1.4 | 63 15 -13.7 -6.8 1 1000 193 120 11 -9.5 5.5 | 90 27 -26.9 0.0 2 986 305 120 20 -17.3 10.0 | 97 35 -34.7 4.5 3 950 610 135 15 -10.6 10.6 | 100 28 -28.0 5.1 4 925 832 160 17 -5.8 16.0 | 114 25 -23.2 10.5 5 916 914 170 14 -2.4 13.8 | 113 22 -19.9 8.3 6 882 1219 185 23 2.0 22.9 | 139 23 -15.4 17.4 7 850 1527 180 29 0.0 29.0 | 143 29 -17.4 23.5 8 819 1829 190 30 5.2 29.5 | 153 27 -12.2 24.1 9 789 2134 190 30 5.2 29.5 | 153 27 -12.2 24.1 10 760 2438 200 28 9.6 26.3 | 159 22 -7.8 20.8 11 732 2743 215 26 14.9 21.3 | 171 16 -2.5 15.8 12 705 3048 235 24 19.7 13.8 | 195 9 2.2 8.3 13 700 3101 235 26 21.3 14.9 | 202 10 3.9 9.4 14 651 3658 245 27 24.5 11.4 | 230 9 7.1 5.9 15 626 3962 260 26 25.6 4.5 | 277 8 8.2 -1.0 16 602 4267 245 21 19.0 8.9 | 205 4 1.6 3.4 17 579 4572 250 20 18.8 6.8 | 225 2 1.4 1.4 18 556 4877 250 24 22.6 8.2 | 242 6 5.1 2.7 19 514 5486 260 28 27.6 4.9 | 273 10 10.2 -0.6 20 500 5700 250 27 25.4 9.2 | 245 9 8.0 3.8 21 473 6096 250 28 26.3 9.6 | 245 10 8.9 4.1 22 454 6401 270 29 29.0 -0.0 | 295 13 11.6 -5.5 23 400 7320 255 43 41.5 11.1 | 257 25 24.1 5.7 24 383 7620 255 46 44.4 11.9 | 257 28 27.0 6.4 25 366 7925 255 48 46.4 12.4 | 256 30 28.9 7.0 26 306 9144 280 31 30.5 -5.4 | 310 17 13.1 -10.9 27 300 9290 275 22 21.9 -1.9 | 329 9 4.5 -7.4 28 279 9754 290 19 17.9 -6.5 | 358 12 0.4 -12.0 29 255 10363 270 33 33.0 -0.0 | 289 17 15.6 -5.5 30 250 10480 265 43 42.8 3.7 | 274 25 25.4 -1.7 31 220 11278 275 57 56.8 -5.0 | 285 41 39.4 -10.4 32 207 11674 260 73 71.9 12.7 | 262 55 54.5 7.2 33 200 11887 260 72 70.9 12.5 | 263 54 53.5 7.0 34 200 11890 265 82 81.7 7.1 | 269 64 64.3 1.7 35 198 11954 270 82 82.0 -0.0 | 275 65 64.6 -5.5 36 191 12192 270 82 82.0 -0.0 | 275 65 64.6 -5.5 37 182 12497 285 79 76.3 -20.4 | 294 64 58.9 -25.9 38 174 12802 270 69 69.0 -0.0 | 276 52 51.6 -5.5 39 166 13106 260 70 68.9 12.2 | 263 52 51.5 6.7 40 151 13716 270 82 82.0 -0.0 | 275 65 64.6 -5.5 41 150 13740 270 77 77.0 -0.0 | 275 60 59.6 -5.5 42 124 14935 270 64 64.0 -0.0 | 277 47 46.6 -5.5 43 118 15240 270 70 70.0 -0.0 | 276 53 52.6 -5.5 44 112 15545 280 74 72.9 -12.8 | 288 58 55.5 -18.3 45 102 16154 260 53 52.2 9.2 | 264 35 34.8 3.7 46 100 16260 255 61 58.9 15.8 | 256 43 41.5 10.3 47 97 16459 255 61 58.9 15.8 | 256 43 41.5 10.3 48 87 17069 290 48 45.1 -16.4 | 308 35 27.7 -21.9 49 83 17374 280 41 40.4 -7.1 | 299 26 23.0 -12.6 50 79 17678 265 43 42.8 3.7 | 274 25 25.4 -1.7 51 75 17983 270 49 49.0 -0.0 | 280 32 31.6 -5.5 52 72 18288 280 33 32.5 -5.7 | 307 19 15.1 -11.2 53 70 18420 265 29 28.9 2.5 | 284 12 11.5 -2.9 54 68 18593 280 37 36.4 -6.4 | 302 22 19.0 -11.9 55 65 18898 260 31 30.5 5.4 | 270 13 13.1 -0.1 56 59 19507 265 25 24.9 2.2 | 294 8 7.5 -3.3 57 56 19812 250 27 25.4 9.2 | 245 9 8.0 3.8 58 53 20117 270 26 26.0 -0.0 | 303 10 8.6 -5.5 59 50 20422 265 19 18.9 1.7 | 338 4 1.5 -3.8 60 50 20480 275 17 16.9 -1.5 | 4 7 -0.5 -6.9 61 48 20726 280 23 22.7 -4.0 | 331 11 5.2 -9.5 62 46 21031 260 15 14.8 2.6 | 43 4 -2.6 -2.9 63 44 21336 300 28 24.2 -14.0 | 341 21 6.8 -19.5 64 41 21641 300 20 17.3 -10.0 | 0 15 -0.1 -15.5 65 40 21946 240 19 16.5 9.5 | 167 4 -1.0 4.0 66 38 22250 280 18 17.7 -3.1 | 358 9 0.3 -8.6 67 36 22555 270 27 27.0 -0.0 | 300 11 9.6 -5.5 68 34 22860 270 19 19.0 -0.0 | 344 6 1.6 -5.5 69 32 23165 245 19 17.2 8.0 | 176 3 -0.2 2.6 70 31 23470 290 13 12.2 -4.4 | 28 11 -5.2 -9.9 71 30 23660 290 14 13.2 -4.8 | 23 11 -4.3 -10.3 72 29 23774 300 19 16.5 -9.5 | 4 15 -1.0 -15.0 73 28 24079 275 13 13.0 -1.1 | 34 8 -4.5 -6.6 74 27 24384 255 18 17.4 4.7 | 2 1 -0.0 -0.8 75 25 24689 245 25 22.7 10.6 | 226 7 5.2 5.1 76 24 24994 305 11 9.0 -6.3 | 36 14 -8.4 -11.8 77 22 25603 255 3 2.9 0.8 | 72 15 -14.5 -4.7 78 20 26170 305 13 10.6 -7.5 | 28 15 -6.8 -12.9 79 20 26213 285 25 24.1 -6.5 | 331 14 6.7 -11.9 80 18 26518 310 13 10.0 -8.4 | 28 16 -7.5 -13.8 81 16 26822 270 13 13.0 -0.0 | 39 7 -4.4 -5.5 82 14 27127 305 18 14.7 -10.3 | 10 16 -2.7 -15.8 83 13 27432 305 22 18.0 -12.6 | 358 18 0.6 -18.1 84 11 28042 315 32 22.6 -22.6 | 349 29 5.2 -28.1 85 10 28346 340 28 9.6 -26.3 | 14 33 -7.8 -31.8 86 8 28956 320 29 18.6 -22.2 | 357 28 1.2 -27.7 Wind Parameters Mean winds (0-6000m): 222.6 at 24.3 knts Storm direction: 252.6 at 18.3 knts Shear (0-3000m) pos: 5.5 neg: 3.2 tot: 8.8 10-3/s Storm rel Dir Shear (0-3000m): 138.6 deg Storm rel helicity (0-3000m) pos: 304.9 neg: 0.0 tot: 304.9 m^2/s^2 ave: 101.6 10^-3 m/s^2 rel: 0.62 Storm rel vorticity (0-3000m) horiz: 14.3 stream: 8.8 10^-3/s Energy-Hel index: 0.06 Bulk Rich Number: 0.32 Bulk Shear: 121.62 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 ------------------------------------------------------------------------------- 500 125 15 96 30| 0.0 19.4 19.4| 94.8 0.0 94.8 189.6 0.52| 30.8 15.9 1000 143 16 105 28| 7.1 9.7 16.8|172.5 0.0 172.5 172.5 0.60| 23.6 14.1 1500 162 19 118 26| 7.6 6.5 14.1|221.4 0.0 221.4 147.6 0.61| 19.5 12.0 2000 172 22 128 26| 6.4 4.9 11.2|248.1 0.0 248.1 124.1 0.63| 15.7 9.9 2500 178 23 134 25| 5.5 3.9 9.4|277.3 0.0 277.3 110.9 0.62| 14.4 8.9 3000 186 23 140 23| 5.5 3.2 8.8|304.9 0.0 304.9 101.6 0.62| 14.3 8.8 4000 204 24 155 18| 4.4 2.4 6.8|330.4 -3.1 327.3 81.8 0.62| 12.5 7.8 5000 214 24 163 15| 4.0 2.3 6.3|334.6 -7.3 327.3 65.5 0.55| 11.2 6.2 6000 223 24 176 12| 3.5 2.0 5.5|340.1 -18.1 322.0 53.7 0.49| 10.2 5.0 Wrote GIF file: /home/apache/climate/data/raob//KIAD/skewt/KIAD.skewt.20251218.12.gif