UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025121800.upa.cvt Date: 0000Z 18 DEC 25 Searching for VTBC... Searching the city database file for: VTBC ... Date:0000Z 18 DEC 25 Station: VTBC WMO ident: 48480 Latitude: 12.60 Longitude: 102.12 Elevation: 4.00 ------------------------------------------------------------------------------- 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 1010 4 24.2 20.3 79 3.9 21.5 60 5 296.5 299.2 294.3 339.8 15.01 1 1000 92 23.6 18.9 75 4.7 20.4 40 12 296.8 299.3 293.5 336.8 13.87 2 959 458 21.4 18.4 83 3.0 19.4 52 16 298.1 300.6 294.0 338.8 14.02 3 925 772 21.6 17.6 78 4.0 18.8 55 16 301.4 303.9 294.8 342.1 13.82 4 909 923 20.8 17.0 79 3.8 18.2 50 15 302.1 304.6 294.8 342.0 13.53 5 907 943 20.8 16.8 78 4.0 18.1 51 15 302.3 304.7 294.7 341.8 13.39 6 850 1502 17.6 13.9 79 3.7 15.1 65 10 304.6 306.8 294.3 339.9 11.83 7 788 2145 13.0 10.5 85 2.5 11.4 99 7 306.3 308.2 293.6 337.0 10.17 8 734 2741 11.2 3.2 58 8.0 6.6 41 6 310.6 311.9 292.0 331.0 6.57 9 700 3136 8.8 1.8 61 7.0 4.9 10 4 312.2 313.4 292.2 331.7 6.24 10 695 3195 8.8 0.8 57 8.0 4.4 9 4 312.9 314.0 292.0 331.2 5.84 11 650 3745 4.6 -1.4 65 6.0 1.5 354 3 314.2 315.2 292.0 331.0 5.32 12 607 4302 3.0 -11.0 35 14.0 -3.0 272 7 318.5 319.1 291.0 327.5 2.72 13 577 4711 0.2 -11.8 40 12.0 -4.8 230 10 319.9 320.4 291.4 328.8 2.68 14 566 4865 0.2 -24.8 13 25.0 -7.5 230 11 321.7 321.8 290.2 324.8 0.90 15 532 5359 -3.1 -19.1 28 16.0 -8.7 230 11 323.5 323.8 291.4 328.9 1.59 16 525 5464 -2.1 -47.1 2 45.0 -10.5 230 11 325.9 325.9 290.6 326.3 0.10 17 500 5850 -5.1 -49.1 2 44.0 -12.6 240 9 326.8 326.8 290.9 327.2 0.09 TRP WND Sounding variables and indices 1000-500 mb thick: 5758.00 m Freezing level: 563.94 mb = 4894.87 m = 16059.10 ft Wetbulb zero: 635.66 mb = 3926.63 m = 12882.48 ft Precipitable water: 1.62 inches Sfc-500 mean rel hum: 56.31 % Est. max temperature: 31.88 C = 89.39 F Sfc-Lift cond lev (LCL): 954.21 mb = 501.39 m = 1644.95 ft T: 21.43 C 700-500 lapse rate: 5.12 C/km ThetaE index: 11.06 C Layer 909.0- 700.0 mb Conv cond level (CCL): 827.96 mb = 1725.05 m = 5659.53 ft Mean mixing ratio: 13.94 g/kg Conv temperature: 32.92 C = 91.25 F Cap Strength: 3.33 C Lifted Index: 1.91 C Risk: Showers probable Lifted Index @700 mb: 1.28 C Showalter Index: 1.74 C Risk: Showers probable Total Totals Index: 41.70 C Risk: None Vertical Totals Index: 22.70 C Cross Totals Index: 19.00 C K Index: 29.60 Risk: 40-60 % chance of thunderstorms Sweat Index: 195.80 Risk: None Energy Index: -2.35 Risk: Severe Thunderstorms probable Parcel Indices Parcel: using 100 mb layer CAPE (B+): 23.33 J/kg Max Up Vert Vel: 6.83 m/s Conv Inhibition (B-): 275.40 J/kg Cap Strength: 3.33 C Lift Cond Lev (LCL): 907.26 mb = 940.04 m = 3084.10 ft Lev Free Conv (LFC): -1.00 mb = -9999.00 m = -9999.00 ft Wind level data Storm motion: 90 at 7 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 1010 4 60 5 -4.3 -2.5 | 317 3 2.3 -2.5 1 1000 92 40 12 -7.7 -9.2 | 7 9 -1.1 -9.2 2 976 305 45 16 -11.3 -11.3 | 22 12 -4.7 -11.3 3 942 610 60 16 -13.9 -8.0 | 42 11 -7.2 -8.0 4 925 772 55 16 -13.1 -9.2 | 35 11 -6.5 -9.2 5 910 914 50 15 -11.5 -9.6 | 27 11 -4.9 -9.6 6 850 1502 65 10 -9.1 -4.2 | 30 5 -2.4 -4.2 7 848 1524 65 10 -9.1 -4.2 | 30 5 -2.4 -4.2 8 789 2134 100 7 -6.9 1.2 | 168 1 -0.3 1.2 9 707 3048 10 5 -0.9 -4.9 | 311 8 5.8 -4.9 10 700 3136 10 4 -0.7 -3.9 | 304 7 5.9 -3.9 11 656 3658 5 2 -0.2 -2.0 | 287 7 6.5 -2.0 12 586 4572 230 9 6.9 5.8 | 247 15 13.5 5.8 13 564 4877 230 11 8.4 7.1 | 245 17 15.1 7.1 14 523 5486 230 11 8.4 7.1 | 245 17 15.1 7.1 15 500 5850 240 9 7.8 4.5 | 253 15 14.4 4.5 16 484 6096 235 10 8.2 5.7 | 249 16 14.8 5.7 Wind Parameters Mean winds (0-6000m): 60.0 at 8.8 knts Storm direction: 90.0 at 6.6 knts Shear (0-3000m) pos: 1.7 neg: 2.0 tot: 3.6 10-3/s Storm rel Dir Shear (0-3000m): -4.8 deg Storm rel helicity (0-3000m) pos: 29.4 neg: -11.8 tot: 17.6 m^2/s^2 ave: 5.9 10^-3 m/s^2 rel: 0.23 Storm rel vorticity (0-3000m) horiz: 6.9 stream: 1.6 10^-3/s Energy-Hel index: 0.00 Bulk Rich Number: 5.54 Bulk Shear: 4.21 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 46 14 20 10| 0.0 11.3 11.3| 22.3 0.0 22.3 44.5 0.73| 15.4 11.3 1000 51 15 27 10| 0.0 4.8 4.8| 26.4 -8.0 18.4 18.4 0.48| 10.3 4.9 1500 53 14 28 9| 1.7 3.2 4.9| 27.3 -8.1 19.2 12.8 0.40| 8.6 3.4 2000 57 13 30 8| 2.5 2.4 4.9| 29.2 -8.1 21.1 10.6 0.43| 7.7 3.3 2500 60 11 30 7| 2.0 2.2 4.2| 29.4 -8.4 21.0 8.4 0.32| 7.3 2.4 3000 59 10 23 6| 1.7 2.0 3.6| 29.4 -11.8 17.6 5.9 0.23| 6.9 1.6 4000 54 9 3 5| 1.3 1.4 2.6| 30.2 -18.9 11.3 2.8 0.13| 6.1 0.8 5000 56 9 6 5| 1.0 0.9 1.9| 30.2 -55.5 -25.3 -5.1 -0.07| 6.2 -0.4 6000 60 9 13 5| 0.7 0.8 1.5| 38.4 -57.2 -18.7 -3.1 -0.04| 5.4 -0.2 Wrote GIF file: /home/apache/climate/data/raob//VTBC/skewt/VTBC.skewt.20251218.00.gif