UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025121700.upa.cvt Date: 0000Z 17 DEC 25 Searching for VVNB... Searching the city database file for: VVNB ... Date:0000Z 17 DEC 25 Station: VVNB WMO ident: 48820 Latitude: 21.02 Longitude: 105.80 Elevation: 6.00 ------------------------------------------------------------------------------- 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 1020 6 19.8 17.5 87 2.3 18.3 245 1 291.3 293.5 290.7 326.4 12.43 1 1000 179 18.0 17.1 94 0.9 17.4 315 5 291.1 293.3 290.6 326.0 12.36 2 987 291 17.0 16.7 98 0.3 16.8 333 6 291.2 293.4 290.5 325.7 12.20 3 936 744 15.4 15.4 100 0.0 15.4 44 10 294.1 296.2 291.1 327.9 11.83 4 925 845 15.0 15.0 100 0.0 15.0 60 11 294.6 296.7 291.2 328.1 11.67 5 850 1559 11.2 11.2 100 0.0 11.2 155 1 297.9 299.7 290.7 326.6 9.88 6 833 1728 10.2 10.2 100 0.0 10.2 167 2 298.6 300.3 290.6 326.1 9.42 7 793 2137 8.0 6.5 90 1.5 7.1 196 4 300.4 301.8 289.7 323.1 7.68 8 787 2199 8.0 5.1 82 2.9 6.4 201 4 301.1 302.4 289.3 321.9 7.01 9 779 2284 8.4 2.4 66 6.0 5.2 207 5 302.4 303.5 288.7 320.0 5.85 10 700 3159 1.6 -2.4 75 4.0 -0.3 270 9 304.3 305.1 288.2 318.3 4.58 11 682 3368 -0.3 -3.6 78 3.3 -1.8 268 11 304.4 305.2 287.9 317.6 4.30 12 675 3451 0.0 -14.0 34 14.0 -5.1 268 12 305.6 306.0 285.9 311.8 1.92 13 652 3730 2.2 -22.8 14 25.0 -5.5 266 15 311.2 311.4 286.9 314.3 0.94 14 611 4252 -0.9 -23.9 16 23.0 -7.7 262 20 313.4 313.6 287.6 316.5 0.91 15 604 4344 -0.5 -33.5 6 33.0 -8.4 261 21 314.9 315.0 287.5 316.3 0.37 16 601 4384 -0.5 -29.5 9 29.0 -8.1 261 21 315.4 315.5 287.9 317.3 0.55 17 500 5830 -10.1 -41.1 6 31.0 -15.6 250 36 320.7 320.8 289.2 321.5 0.21 18 408 7364 -20.5 -49.5 6 29.0 -23.8 259 43 326.5 326.5 290.8 326.9 0.10 19 400 7510 -21.1 -52.1 4 31.0 -24.4 260 44 327.6 327.6 291.1 327.9 0.08 20 382 7848 -22.3 -56.3 3 34.0 -25.5 262 49 330.3 330.3 291.9 330.5 0.05 21 352 8447 -23.1 -61.1 2 38.0 -26.3 264 59 337.1 337.1 293.6 337.2 0.03 22 300 9600 -29.9 -63.9 2 34.0 -32.1 270 77 343.2 343.2 295.1 343.3 0.02 23 273 10263 -34.3 -68.3 2 34.0 -36.0 265 80 346.2 346.2 295.8 346.3 0.01 24 250 10870 -39.5 -69.5 3 30.0 -40.6 260 83 347.3 347.3 296.1 347.4 0.01 25 200 12360 -51.9 -72.9 6 21.0 -52.3 235 85 350.6 350.6 296.8 350.6 0.01 26 193 12590 -53.4 -74.8 6 21.4 -53.7 235 91 351.8 351.8 297.0 351.8 0.01 27 182 12964 -55.9 -77.9 5 22.0 -56.2 238 88 353.7 353.7 297.4 353.7 0.01 28 150 14160 -67.3 -80.3 14 13.0 -67.4 250 79 354.2 354.2 297.5 354.2 0.00 29 148 14241 -67.9 -79.9 16 12.0 -67.9 250 79 354.5 354.5 297.6 354.5 0.00 30 132 14920 -73.3 -78.3 46 5.0 -73.3 252 75 356.6 356.6 298.0 356.7 0.01 31 110 15969 -80.1 -85.1 43 5.0 -80.1 255 69 362.9 362.9 299.2 362.9 0.00 32 100 16510 -78.9 -86.9 26 8.0 -78.9 265 60 375.3 375.3 301.5 375.3 0.00 TRP 110 15969 -80.1 -85.1 43 5.0 -80.1 255 69 362.9 362.9 299.2 362.9 0.00 WND 193 12590 -53.4 -74.8 6 21.4 -53.7 235 91 351.8 351.8 297.0 351.8 0.01 Sounding variables and indices 1000-500 mb thick: 5651.00 m Freezing level: 684.84 mb = 3335.31 m = 10942.50 ft Freezing level: 675.00 mb = 3451.05 m = 11322.20 ft Freezing level: 622.90 mb = 4100.50 m = 13452.91 ft Wetbulb zero: 704.76 mb = 3103.55 m = 10182.14 ft Precipitable water: 1.27 inches Sfc-500 mean rel hum: 55.36 % Est. max temperature: 25.53 C = 77.95 F Sfc-Lift cond lev (LCL): 986.25 mb = 297.73 m = 976.81 ft T: 16.98 C 700-500 lapse rate: 4.38 C/km ThetaE index: 16.31 C Layer 850.0- 652.0 mb Conv cond level (CCL): 956.72 mb = 557.42 m = 1828.77 ft Mean mixing ratio: 12.07 g/kg Conv temperature: 21.41 C = 70.53 F Cap Strength: 3.23 C Lifted Index: 2.71 C Risk: None Lifted Index @300 mb: 12.44 C Lifted Index @700 mb: -1.53 C Showalter Index: 2.77 C Risk: Showers probable Total Totals Index: 42.60 C Risk: None Vertical Totals Index: 21.30 C Cross Totals Index: 21.30 C K Index: 28.50 Risk: 40-60 % chance of thunderstorms Sweat Index: 172.40 Risk: None Energy Index: -0.95 Risk: Scattered severe thunderstorms Parcel Indices Parcel: using 100 mb layer CAPE (B+): 61.55 J/kg Max Up Vert Vel: 11.09 m/s Conv Inhibition (B-): 6.40 J/kg Cap Strength: 3.20 C Lift Cond Lev (LCL): 962.57 mb = 505.36 m = 1658.00 ft Lev Free Conv (LFC): 857.57 mb = 1484.16 m = 4869.22 ft Equ Level (EL): 777.57 mb = 2299.05 m = 7542.72 ft B at Equ Level: 20.83 J/kg Max Parcel Lev (MPL): 597.57 mb = 4429.00 m = 14530.67 ft Wind level data Storm motion: 287 at 11 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 1020 6 245 1 0.9 0.4 | 111 10 -9.3 3.6 1 1000 179 315 5 3.5 -3.5 | 87 7 -6.7 -0.3 2 925 845 60 11 -9.5 -5.5 | 83 20 -19.8 -2.3 3 850 1559 155 1 -0.4 0.9 | 111 11 -10.7 4.1 4 700 3159 270 9 9.0 -0.0 | 159 3 -1.2 3.2 5 500 5830 250 36 33.8 12.3 | 237 28 23.6 15.5 6 400 7510 260 44 43.3 7.6 | 252 35 33.1 10.8 7 300 9600 270 77 77.0 -0.0 | 267 67 66.8 3.2 8 250 10870 260 83 81.7 14.4 | 256 74 71.5 17.6 9 200 12360 235 85 69.6 48.8 | 229 79 59.4 51.9 10 193 12590 235 91 74.5 52.2 | 229 85 64.3 55.4 11 150 14160 250 79 74.2 27.0 | 245 71 64.0 30.2 12 110 15969 255 69 66.6 17.9 | 250 60 56.4 21.0 13 100 16510 265 60 59.8 5.2 | 260 50 49.5 8.4 Wind Parameters Mean winds (0-6000m): 257.3 at 14.3 knts Storm direction: 287.3 at 10.7 knts Shear (0-3000m) pos: 1.2 neg: 0.0 tot: 1.2 10-3/s Storm rel Dir Shear (0-3000m): 44.4 deg Storm rel helicity (0-3000m) pos: 87.1 neg: -12.4 tot: 74.7 m^2/s^2 ave: 24.9 10^-3 m/s^2 rel: 0.34 Storm rel vorticity (0-3000m) horiz: 7.9 stream: 2.7 10^-3/s Energy-Hel index: 0.03 Bulk Rich Number: 2.20 Bulk Shear: 27.94 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 ------------------------------------------------------------------------------- 500 339 5 78 9| 8.8 0.0 8.8| 0.0 -11.5 -11.5 -23.0 -0.49| 12.2 -6.0 1000 39 7 80 15| 5.0 0.0 5.0| 42.5 -11.5 31.0 31.0 0.12| 12.9 1.6 1500 48 7 85 15| 0.7 0.0 0.7| 66.5 -12.0 54.5 36.3 0.24| 11.9 2.8 2000 52 6 89 15| 0.7 0.0 0.7| 73.5 -12.4 61.1 30.5 0.28| 9.6 2.7 2500 55 5 90 15| 1.0 0.0 1.0| 82.5 -12.4 70.1 28.0 0.33| 8.5 2.8 3000 351 6 76 10| 1.2 0.0 1.2| 87.1 -12.4 74.7 24.9 0.34| 7.9 2.7 4000 285 7 112 3| 1.5 0.7 2.2| 94.5 -12.4 82.1 20.5 0.38| 7.3 2.8 5000 267 10 182 4| 1.2 1.6 2.8| 97.5 -12.7 84.7 16.9 0.34| 6.9 2.3 6000 257 14 210 7| 1.0 2.2 3.1|103.4 -20.1 83.3 13.9 0.29| 6.6 1.9 Wrote GIF file: /home/apache/climate/data/raob//VVNB/skewt/VVNB.skewt.20251217.00.gif