UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025120912.upa.cvt Date: 1200Z 9 DEC 25 Searching for U2820... Searching the city database file for: U2820 ... Date:1200Z 9 DEC 25 Station: U2820 WMO ident: 22820 Latitude: 61.82 Longitude: 34.27 ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- 0 1000 46 160 3 SFC 992 110 0.4 -0.7 92 1.1 -0.0 160 3 274.2 274.8 273.5 284.1 3.66 2 927 652 -1.9 -3.7 87 1.8 -2.6 213 24 277.2 277.7 274.5 285.9 3.13 3 925 669 -1.9 -3.7 87 1.8 -2.6 215 25 277.4 277.9 274.6 286.1 3.14 4 850 1341 -2.1 -3.8 88 1.7 -2.8 215 15 283.9 284.5 278.4 293.6 3.39 5 812 1704 -3.3 -4.9 89 1.6 -3.9 221 16 286.4 287.0 279.4 295.8 3.27 6 700 2863 -10.3 -12.7 83 2.4 -11.1 240 21 291.1 291.4 280.1 297.2 2.05 7 571 4402 -20.5 -23.9 74 3.4 -21.2 243 22 296.6 296.7 281.2 299.7 0.97 8 500 5370 -28.7 -32.8 68 4.1 -29.2 245 23 298.0 298.1 281.2 299.7 0.48 9 400 6920 -40.7 -45.7 59 5.0 -41.0 235 25 302.1 302.1 282.4 302.7 0.16 10 306 8684 -55.1 -61.1 47 6.0 -55.2 230 19 305.9 305.9 283.8 306.1 0.03 11 300 8810 -55.3 -61.3 47 6.0 -55.4 230 19 307.4 307.4 284.4 307.5 0.03 12 281 9228 -55.5 -61.5 47 6.0 -55.6 238 21 312.9 312.9 286.4 313.1 0.03 13 252 9920 -58.5 -64.5 46 6.0 -58.6 250 25 318.4 318.4 288.2 318.5 0.03 14 251 9945 -58.5 -64.5 46 6.0 -58.6 250 25 318.7 318.7 288.3 318.8 0.03 15 250 9970 -58.3 -64.3 46 6.0 -58.4 250 25 319.4 319.4 288.6 319.5 0.03 16 200 11370 -58.5 -65.5 40 7.0 -58.6 270 25 340.1 340.1 294.4 340.2 0.03 17 191 11660 -57.7 -64.7 40 7.0 -57.8 273 27 345.9 345.9 295.7 346.1 0.03 18 150 13170 -61.3 -69.3 34 8.0 -61.4 290 35 364.5 364.5 299.6 364.6 0.02 19 100 15650 -66.7 -74.7 32 8.0 -66.8 295 38 398.9 398.9 305.0 398.9 0.02 20 70 17780 -71.9 -79.9 29 8.0 -72.0 305 46 430.6 430.6 308.9 430.6 0.01 21 50 19760 -74.3 -83.3 24 9.0 -74.4 310 56 468.4 468.4 312.5 468.4 0.01 22 37 21496 -78.3 -87.3 22 9.0 -78.4 500.3 500.3 314.9 500.3 0.01 TRP 252 9920 -58.5 -64.5 46 6.0 -58.6 250 25 318.4 318.4 288.2 318.5 0.03 WND Sounding variables and indices 1000-500 mb thick: 5324.00 m Freezing level: 980.70 mb = 204.59 m = 671.22 ft Wetbulb zero: Below ground Precipitable water: 0.48 inches Sfc-500 mean rel hum: 81.49 % Est. max temperature: 10.65 C = 51.17 F Sfc-Lift cond lev (LCL): 975.00 mb = 248.54 m = 815.39 ft T: -0.19 C 700-500 lapse rate: 7.34 C/km Conv cond level (CCL): 778.97 mb = 2028.13 m = 6653.88 ft Mean mixing ratio: 3.32 g/kg Conv temperature: 13.92 C = 57.06 F Cap Strength: 10.42 C Lifted Index: 10.60 C Risk: None Lifted Index @300 mb: 15.23 C Lifted Index @700 mb: 8.08 C Showalter Index: 4.85 C Risk: None Total Totals Index: 51.50 C Risk: Scattered heavy thunderstorms Vertical Totals Index: 26.60 C Cross Totals Index: 24.90 C K Index: 20.40 Risk: 20-40 % chance of thunderstorms Sweat Index: 190.50 Risk: None Energy Index: 1.27 Risk: None Parcel Indices Parcel: using 100 mb layer CAPE (B+): 21.19 J/kg Max Up Vert Vel: 6.51 m/s Conv Inhibition (B-): 33546.60 J/kg Cap Strength: 10.56 C Lift Cond Lev (LCL): 917.84 mb = 730.78 m = 2397.53 ft Lev Free Conv (LFC): -1.00 mb = -9999.00 m = -9999.00 ft Wind level data Storm motion: 265 at 15 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 ---------------------------------------------------------- 0 992 110 160 3 -1.0 2.8 | 95 16 -16.2 1.5 1 925 669 215 25 14.3 20.5 | 178 19 -0.8 19.1 2 850 1341 215 15 8.6 12.3 | 149 13 -6.5 11.0 3 700 2863 240 21 18.2 10.5 | 198 10 3.0 9.2 4 500 5370 245 23 20.8 9.7 | 214 10 5.7 8.4 5 400 6920 235 25 20.5 14.3 | 202 14 5.3 13.0 6 300 8810 230 19 14.6 12.2 | 177 11 -0.6 10.9 7 252 9920 250 25 23.5 8.6 | 229 11 8.3 7.2 8 250 9970 250 25 23.5 8.6 | 229 11 8.3 7.2 9 200 11370 270 25 25.0 -0.0 | 278 10 9.9 -1.3 10 150 13170 290 35 32.9 -12.0 | 307 22 17.7 -13.3 11 100 15650 295 38 34.4 -16.1 | 312 26 19.3 -17.4 12 70 17780 305 46 37.7 -26.4 | 321 36 22.5 -27.7 13 50 19760 310 56 42.9 -36.0 | 323 47 27.8 -37.3 Wind Parameters Mean winds (0-6000m): 235.0 at 20.3 knts Storm direction: 265.0 at 15.2 knts Shear (0-3000m) pos: 3.6 neg: 0.0 tot: 3.6 10-3/s Storm rel Dir Shear (0-3000m): 104.7 deg Storm rel helicity (0-3000m) pos: 148.3 neg: -27.6 tot: 120.7 m^2/s^2 ave: 40.2 10^-3 m/s^2 rel: 0.63 Storm rel vorticity (0-3000m) horiz: 7.7 stream: 4.8 10^-3/s Energy-Hel index: 0.02 Bulk Rich Number: 1.49 Bulk Shear: 14.23 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 ------------------------------------------------------------------------------- 500 209 13 138 13| 21.5 0.0 21.5|107.3 0.0 107.3 214.6 0.99| 23.6 23.4 1000 213 17 157 14| 8.7 0.0 8.7|121.6 -18.3 103.3 103.3 0.67| 16.4 11.0 1500 214 17 156 14| 5.1 0.0 5.1|125.2 -27.6 97.6 65.1 0.55| 12.5 6.8 2000 216 17 158 13| 4.4 0.0 4.4|134.1 -27.6 106.5 53.3 0.58| 10.2 5.9 2500 220 17 162 13| 4.0 0.0 4.0|143.0 -27.6 115.4 46.2 0.61| 8.8 5.4 3000 224 18 167 12| 3.6 0.0 3.6|148.3 -27.6 120.7 40.2 0.63| 7.7 4.8 4000 229 19 175 11| 2.8 0.0 2.8|151.1 -27.6 123.5 30.9 0.63| 5.9 3.8 5000 233 20 183 11| 2.3 0.0 2.3|154.0 -27.6 126.3 25.3 0.64| 4.8 3.1 6000 235 20 188 10| 1.9 0.2 2.1|154.5 -30.9 123.7 20.6 0.59| 4.2 2.5 Wrote GIF file: /home/apache/climate/data/raob//U2820/skewt/U2820.skewt.20251209.12.gif