UPPER AIR CALCULATIONS AND PLOTTING (Ver 5.52-LINUX-X11) Current filename: /home/data/upa/2025061000.upa.cvt Date: 0000Z 10 JUN 25 Searching for KIAD... Searching the city database file for: KIAD ... Date:0000Z 10 JUN 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 ------------------------------------------------------------------------------- 0 1000 75 145 6 SFC 999 98 26.6 20.6 70 6.0 22.3 145 6 299.8 302.7 295.5 345.1 15.47 2 994 141 26.2 18.2 61 8.0 20.7 146 7 299.9 302.3 294.0 338.9 13.34 3 925 758 20.2 17.5 84 2.7 18.4 160 13 300.0 302.5 294.3 340.1 13.73 4 915 852 19.2 17.2 88 2.0 17.8 166 13 299.9 302.4 294.3 339.7 13.62 5 898 1013 18.0 16.2 89 1.8 16.8 183 14 300.2 302.6 293.9 338.4 13.01 6 887 1119 17.6 15.1 85 2.5 16.0 197 15 300.9 303.1 293.6 336.9 12.26 7 881 1177 17.8 13.8 77 4.0 15.2 204 16 301.7 303.8 293.1 335.1 11.33 8 850 1483 15.2 13.0 87 2.2 13.8 200 14 302.1 304.1 293.0 335.0 11.14 9 815 1839 12.8 11.4 91 1.4 11.9 205 12 303.2 305.1 292.9 334.2 10.45 10 795 2047 11.6 10.0 90 1.6 10.6 212 12 304.1 305.9 292.6 333.2 9.75 11 792 2079 11.4 9.9 90 1.5 10.4 213 12 304.2 306.0 292.6 333.2 9.72 12 784 2164 10.8 9.3 90 1.5 9.9 215 12 304.4 306.2 292.4 332.6 9.42 13 753 2501 9.8 3.8 66 6.0 6.4 225 15 306.9 308.1 290.9 327.2 6.69 14 744 2601 9.2 5.4 77 3.8 7.0 233 16 307.3 308.7 291.8 330.3 7.58 15 736 2691 8.6 3.7 71 4.9 5.8 240 16 307.6 308.8 291.2 328.3 6.80 16 728 2781 8.4 1.4 61 7.0 4.6 245 17 308.3 309.4 290.6 326.2 5.82 17 710 2988 6.8 0.8 66 6.0 3.6 248 20 308.8 309.8 290.7 326.4 5.72 18 706 3035 6.4 2.3 75 4.1 4.1 249 21 308.8 310.0 291.3 328.5 6.41 19 703 3070 6.6 0.6 65 6.0 3.4 250 21 309.4 310.5 290.9 327.0 5.69 20 700 3105 6.4 1.4 70 5.0 3.7 250 22 309.6 310.7 291.2 328.3 6.06 21 695 3164 6.2 0.2 65 6.0 3.0 252 22 310.0 311.0 291.0 327.3 5.59 22 671 3451 4.2 -1.8 65 6.0 1.1 256 19 310.9 311.8 290.7 326.5 5.00 23 662 3561 3.2 0.3 81 2.9 1.7 250 19 311.0 312.1 291.5 329.3 5.92 24 657 3623 2.8 2.5 98 0.3 2.7 247 18 311.2 312.5 292.5 332.8 6.99 25 646 3759 1.8 1.8 100 0.0 1.8 244 19 311.5 312.8 292.4 332.5 6.76 26 622 4064 -0.3 -0.5 99 0.2 -0.4 244 25 312.5 313.7 292.0 331.1 5.94 27 620 4090 0.0 -1.4 90 1.4 -0.7 245 25 313.2 314.2 291.9 330.7 5.58 28 616 4142 -0.5 -1.7 92 1.2 -1.1 248 26 313.2 314.2 291.8 330.4 5.49 29 612 4194 0.0 -6.0 64 6.0 -2.8 251 27 314.3 315.1 290.9 327.1 3.99 30 598 4379 -1.3 -8.3 59 7.0 -4.4 255 30 314.9 315.6 290.5 325.9 3.42 31 597 4393 -1.5 -8.5 59 7.0 -4.6 255 30 314.8 315.5 290.5 325.7 3.37 32 593 4446 -1.3 -13.3 40 12.0 -6.0 255 30 315.7 316.1 289.8 323.3 2.31 33 592 4460 -0.9 -20.9 20 20.0 -7.4 255 30 316.3 316.5 288.9 320.4 1.22 34 588 4514 -0.9 -23.9 16 23.0 -7.8 255 31 316.9 317.1 288.8 320.2 0.94 35 583 4582 -1.1 -16.1 31 15.0 -6.6 255 31 317.4 317.8 289.9 323.7 1.87 36 577 4665 -1.3 -14.3 36 13.0 -6.3 250 30 318.2 318.6 290.4 325.4 2.19 37 553 5002 -4.3 -14.3 46 10.0 -8.1 233 25 318.5 318.9 290.6 326.1 2.28 38 545 5117 -5.1 -17.1 38 12.0 -9.3 231 23 318.9 319.2 290.3 325.0 1.84 39 542 5161 -5.5 -14.5 49 9.0 -8.8 231 22 318.9 319.3 290.7 326.5 2.29 40 539 5204 -5.7 -19.7 32 14.0 -10.2 230 21 319.2 319.4 290.0 324.2 1.49 41 536 5248 -6.1 -20.1 32 14.0 -10.6 228 22 319.2 319.5 290.0 324.1 1.44 42 535 5263 -6.3 -19.3 35 13.0 -10.5 228 22 319.1 319.4 290.1 324.4 1.55 43 525 5410 -7.5 -20.5 35 13.0 -11.6 223 25 319.4 319.7 290.0 324.3 1.42 44 521 5470 -7.5 -27.5 18 20.0 -12.7 221 27 320.1 320.3 289.6 322.8 0.77 45 510 5636 -8.3 -31.3 14 23.0 -13.7 215 30 321.1 321.2 289.7 323.1 0.55 46 501 5775 -9.3 -27.3 22 18.0 -13.9 211 33 321.5 321.7 290.1 324.4 0.81 47 500 5790 -9.3 -26.3 24 17.0 -13.8 210 33 321.7 321.9 290.2 324.8 0.89 48 497 5836 -9.1 -25.1 26 16.0 -13.5 209 34 322.5 322.7 290.6 326.0 1.00 49 460 6428 -14.7 -27.7 32 13.0 -17.8 200 35 322.7 322.9 290.5 325.7 0.85 50 459 6444 -14.9 -27.9 32 13.0 -18.0 200 35 322.7 322.8 290.5 325.6 0.84 51 456 6494 -15.3 -24.3 46 9.0 -17.7 200 35 322.8 323.0 290.8 326.9 1.17 52 446 6660 -16.9 -22.9 60 6.0 -18.5 200 34 322.8 323.1 291.0 327.5 1.36 53 440 6762 -17.5 -20.5 77 3.0 -18.4 200 33 323.3 323.6 291.5 329.1 1.70 54 400 7470 -20.9 -22.9 84 2.0 -21.4 225 28 327.8 328.1 292.6 333.1 1.52 55 300 9540 -33.7 -36.7 74 3.0 -34.1 250 71 337.9 338.0 294.3 340.0 0.55 56 250 10800 -43.5 -48.5 58 5.0 -43.8 250 86 341.4 341.4 294.8 342.2 0.19 57 200 12250 -56.1 -61.1 53 5.0 -56.2 250 86 343.9 343.9 295.3 344.1 0.05 58 195 12410 -56.6 -62.8 45 6.2 -56.7 255 88 345.7 345.7 295.7 345.8 0.04 59 150 14050 -61.5 -80.5 6 19.0 -61.7 240 64 364.1 364.1 299.5 364.1 0.00 60 124 15213 -67.9 -82.9 10 15.0 -68.0 260 75 372.9 372.9 301.1 372.9 0.00 61 100 16520 -63.7 -86.7 3 23.0 -63.9 240 32 404.7 404.7 305.8 404.7 0.00 62 96 16770 -64.7 -87.7 3 23.0 -64.8 240 32 407.4 407.4 306.2 407.5 0.00 63 89 17235 -61.9 -87.9 2 26.0 -62.1 250 24 422.0 422.0 307.9 422.0 0.00 64 88 17304 -62.3 -87.3 2 25.0 -62.6 258 21 422.5 422.5 308.0 422.5 0.00 65 81 17817 -61.5 -87.5 2 26.0 -61.8 207 16 434.3 434.3 309.3 434.3 0.00 66 77 18133 -58.5 -87.5 1 29.0 -59.0 212 20 446.9 446.9 310.6 446.9 0.00 67 74 18382 -59.7 -86.7 2 27.0 -60.1 208 22 449.5 449.5 310.8 449.5 0.00 68 70 18730 -58.3 -87.3 1 29.0 -58.8 265 15 459.7 459.7 311.7 459.7 0.00 69 69 18821 -57.7 -86.7 1 29.0 -58.3 254 18 462.8 462.8 312.0 462.9 0.00 70 61 19596 -59.3 -87.3 1 28.0 -59.8 182 13 475.9 475.9 313.1 475.9 0.00 71 59 19806 -57.3 -87.3 1 30.0 -58.0 209 10 484.9 484.9 313.8 485.0 0.00 72 53 20483 -58.3 -87.3 1 29.0 -59.0 168 10 497.7 497.7 314.8 497.7 0.00 73 50 20850 -57.7 -87.7 1 30.0 -58.5 175 11 507.5 507.5 315.5 507.5 0.00 74 39 22431 -54.1 -86.1 1 32.0 -55.5 241 5 554.0 554.0 318.3 554.0 0.01 75 30 24120 -52.5 -85.5 1 33.0 -54.5 95 17 601.5 601.5 320.7 601.6 0.01 76 29 24338 -52.5 -85.5 1 33.0 -54.6 87 17 607.4 607.4 320.9 607.4 0.01 77 28 24564 -52.9 -85.9 1 33.0 -55.0 85 18 612.4 612.4 321.2 612.4 0.01 78 22 26133 -48.1 -84.1 1 36.0 -51.9 108 14 670.4 670.4 323.4 670.5 0.02 79 20 26760 -47.7 -83.7 1 36.0 -51.9 105 8 690.2 690.2 324.1 690.3 0.02 80 16 28248 -45.3 -83.3 1 38.0 -51.1 49 13 743.5 743.5 325.7 743.7 0.02 81 15 28680 -45.7 -83.7 1 38.0 -51.5 80 20 756.0 756.0 326.1 756.2 0.02 82 15 28680 -44.3 -82.3 1 38.0 -50.7 80 20 760.7 760.7 326.3 760.9 0.03 83 13 29646 -42.9 -81.9 1 39.0 -50.5 102 15 797.3 797.3 327.2 797.6 0.04 84 12 30187 -43.5 -82.5 1 39.0 -51.2 94 20 813.6 813.6 327.5 814.0 0.04 85 10 31430 -38.5 -80.5 0 42.0 -49.6 70 29 875.8 875.9 329.0 876.5 0.06 86 10 31430 -39.1 -81.1 0 42.0 -49.9 70 29 873.6 873.6 328.9 874.1 0.06 87 9.8 31569 -37.5 -79.5 0 42.0 -49.3 71 29 884.7 884.7 329.1 885.4 0.07 88 9.6 31711 -37.9 -79.9 0 42.0 -49.6 72 29 888.4 888.4 329.2 889.1 0.07 89 9.4 31857 -36.3 -79.3 0 43.0 -49.0 73 29 899.8 899.9 329.4 900.7 0.08 90 8.8 32312 -38.3 -80.3 0 42.0 -50.2 77 29 909.2 909.3 329.6 910.0 0.07 91 8.2 32800 -35.5 -78.5 0 43.0 -49.4 81 28 938.8 938.9 330.2 940.0 0.10 92 7.6 33328 -36.3 -79.3 0 43.0 -50.1 85 28 956.2 956.3 330.5 957.3 0.10 93 7.0 33900 -35.1 -78.1 0 43.0 -50.1 90 28 983.9 984.0 330.9 985.4 0.13 94 6.4 34530 -31.3 -75.3 0 44.0 -49.3 1025.6 1025.7 331.6 1028.3 0.22 TRP 124 15213 -67.9 -82.9 10 15.0 -68.0 260 75 372.9 372.9 301.1 372.9 0.00 WND 195 12410 -56.6 -62.8 45 6.2 -56.7 255 88 345.7 345.7 295.7 345.8 0.04 Sounding variables and indices 1000-500 mb thick: 5715.00 m Freezing level: 625.43 mb = 4020.60 m = 13190.78 ft Freezing level: 620.00 mb = 4089.96 m = 13418.35 ft Freezing level: 620.00 mb = 4089.96 m = 13418.35 ft Freezing level: 612.00 mb = 4194.10 m = 13759.99 ft Freezing level: 612.00 mb = 4194.10 m = 13759.99 ft Wetbulb zero: 626.32 mb = 4008.40 m = 13150.76 ft Precipitable water: 1.66 inches Sfc-500 mean rel hum: 67.30 % Est. max temperature: 28.86 C = 83.95 F Sfc-Lift cond lev (LCL): 915.57 mb = 846.52 m = 2777.26 ft T: 19.26 C 700-500 lapse rate: 5.85 C/km ThetaE index: 6.97 C Layer 915.0- 792.0 mb Conv cond level (CCL): 861.87 mb = 1364.61 m = 4477.02 ft Mean mixing ratio: 13.56 g/kg Conv temperature: 28.69 C = 83.64 F Cap Strength: 1.37 C Lifted Index: -2.35 C Risk: Severe thunderstorms possible Lifted Index @300 mb: 0.62 C Lifted Index @700 mb: -1.18 C Showalter Index: -0.35 C Risk: Thunderstorms probable Total Totals Index: 46.80 C Risk: Scattered moderate thunderstorms Vertical Totals Index: 24.50 C Cross Totals Index: 22.30 C K Index: 32.50 Risk: 60-80 % chance of thunderstorms Sweat Index: 217.00 Risk: None Energy Index: -1.98 Risk: Scattered severe thunderstorms Parcel Indices Parcel: using 100 mb layer CAPE (B+): 572.27 J/kg Max Up Vert Vel: 33.83 m/s Conv Inhibition (B-): 12.58 J/kg Cap Strength: 1.23 C Lift Cond Lev (LCL): 887.10 mb = 1117.96 m = 3667.82 ft Lev Free Conv (LFC): 842.10 mb = 1561.98 m = 5124.54 ft Equ Level (EL): 312.10 mb = 9255.48 m = 30365.37 ft B at Equ Level: 572.03 J/kg Max Parcel Lev (MPL): 162.10 mb = 13565.11 m = 44504.40 ft Wind level data Storm motion: 255 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 ---------------------------------------------------------- 0 999 98 145 6 -3.4 4.9 | 94 18 -18.1 1.1 1 975 305 150 12 -6.0 10.4 | 108 22 -20.6 6.6 2 941 610 150 15 -7.5 13.0 | 113 24 -22.1 9.2 3 925 758 160 13 -4.4 12.2 | 114 21 -19.1 8.4 4 908 914 170 13 -2.3 12.8 | 118 19 -16.9 9.0 5 877 1219 210 16 8.0 13.9 | 147 12 -6.6 10.0 6 850 1483 200 14 4.8 13.2 | 134 14 -9.8 9.3 7 846 1524 190 11 1.9 10.8 | 119 15 -12.7 7.0 8 816 1829 205 12 5.1 10.9 | 127 12 -9.5 7.1 9 786 2134 215 12 6.9 9.8 | 128 10 -7.7 6.0 10 758 2438 220 15 9.6 11.5 | 147 9 -5.0 7.7 11 731 2743 245 16 14.5 6.8 | 178 3 -0.1 3.0 12 700 3105 250 22 20.7 7.5 | 238 7 6.1 3.7 13 679 3353 260 20 19.7 3.5 | 274 5 5.1 -0.3 14 653 3658 245 18 16.3 7.6 | 204 4 1.7 3.8 15 629 3962 240 23 19.9 11.5 | 215 9 5.3 7.7 16 605 4267 255 29 28.0 7.5 | 255 14 13.4 3.7 17 582 4572 255 31 29.9 8.0 | 255 16 15.3 4.2 18 561 4877 235 27 22.1 15.5 | 213 14 7.5 11.7 19 540 5182 230 21 16.1 13.5 | 189 10 1.5 9.7 20 500 5790 210 33 16.5 28.6 | 184 25 1.9 24.8 21 480 6096 200 37 12.7 34.8 | 176 31 -2.0 31.0 22 425 7010 200 32 10.9 30.1 | 172 27 -3.7 26.3 23 408 7315 230 28 21.4 18.0 | 206 16 6.8 14.2 24 400 7470 225 28 19.8 19.8 | 198 17 5.2 16.0 25 392 7620 220 28 18.0 21.4 | 191 18 3.4 17.6 26 375 7925 215 28 16.1 22.9 | 184 19 1.4 19.1 27 345 8534 225 55 38.9 38.9 | 215 43 24.3 35.1 28 317 9144 240 62 53.7 31.0 | 235 48 39.1 27.2 29 300 9540 250 71 66.7 24.3 | 249 56 52.1 20.5 30 266 10363 250 77 72.4 26.3 | 249 62 57.7 22.5 31 250 10800 250 86 80.8 29.4 | 249 71 66.2 25.6 32 200 12250 250 86 80.8 29.4 | 249 71 66.2 25.6 33 195 12410 255 88 85.0 22.8 | 255 73 70.4 19.0 34 192 12497 255 88 85.0 22.8 | 255 73 70.4 19.0 35 174 13106 260 86 84.7 14.9 | 261 71 70.1 11.1 36 158 13716 245 53 48.0 22.4 | 241 38 33.4 18.6 37 150 14050 240 64 55.4 32.0 | 235 50 40.8 28.2 38 143 14326 240 66 57.2 33.0 | 236 52 42.5 29.2 39 130 14935 260 86 84.7 14.9 | 261 71 70.1 11.1 40 124 15213 260 75 73.9 13.0 | 261 60 59.2 9.2 41 123 15240 260 79 77.8 13.7 | 261 64 63.2 9.9 42 112 15850 270 50 50.0 -0.0 | 276 36 35.4 -3.8 43 106 16154 255 35 33.8 9.1 | 255 20 19.2 5.2 44 101 16459 245 37 33.5 15.6 | 238 22 18.9 11.8 45 100 16520 240 32 27.7 16.0 | 227 18 13.1 12.2 46 96 16764 240 32 27.7 16.0 | 227 18 13.1 12.2 47 92 17069 230 31 23.7 19.9 | 210 19 9.1 16.1 48 87 17374 265 19 18.9 1.7 | 297 5 4.3 -2.2 49 83 17678 200 10 3.4 9.4 | 117 13 -11.2 5.6 50 79 17983 215 22 12.6 18.0 | 172 14 -2.0 14.2 51 75 18288 210 19 9.5 16.5 | 158 14 -5.1 12.6 52 72 18593 205 28 11.8 25.4 | 173 22 -2.8 21.6 53 70 18730 265 15 14.9 1.3 | 353 3 0.3 -2.5 54 68 18898 245 21 19.0 8.9 | 221 7 4.4 5.1 55 65 19202 270 11 11.0 -0.0 | 44 5 -3.6 -3.8 56 62 19507 170 14 -2.4 13.8 | 120 20 -17.1 10.0 57 59 19812 210 10 5.0 8.7 | 117 11 -9.6 4.9 58 56 20117 220 3 1.9 2.3 | 83 13 -12.7 -1.5 59 54 20422 180 10 0.0 10.0 | 113 16 -14.6 6.2 60 51 20726 120 10 -8.7 5.0 | 93 23 -23.3 1.2 61 50 20850 175 11 -1.0 11.0 | 115 17 -15.6 7.1 62 49 21031 145 17 -9.8 13.9 | 113 26 -24.4 10.1 63 46 21336 155 11 -4.6 10.0 | 108 20 -19.3 6.2 64 44 21641 195 13 3.4 12.6 | 128 14 -11.3 8.7 65 37 22860 265 1 1.0 0.1 | 75 14 -13.6 -3.7 66 33 23470 35 10 -5.7 -8.2 | 59 24 -20.4 -12.0 67 32 23774 70 14 -13.2 -4.8 | 73 29 -27.8 -8.6 68 30 24079 45 10 -7.1 -7.1 | 63 24 -21.7 -10.9 69 30 24120 95 17 -16.9 1.5 | 86 32 -31.6 -2.3 70 29 24384 85 17 -16.9 -1.5 | 80 32 -31.6 -5.3 71 27 24689 85 19 -18.9 -1.7 | 81 34 -33.5 -5.5 72 26 24994 105 11 -10.6 2.8 | 88 25 -25.2 -1.0 73 24 25603 100 13 -12.8 2.3 | 87 27 -27.4 -1.6 74 23 25908 85 13 -13.0 -1.1 | 80 28 -27.6 -4.9 75 22 26213 115 14 -12.7 5.9 | 94 27 -27.3 2.1 76 20 26760 105 8 -7.7 2.1 | 86 22 -22.3 -1.7 77 20 26822 55 10 -8.2 -5.7 | 67 25 -22.8 -9.5 78 18 27432 100 7 -6.9 1.2 | 83 22 -21.5 -2.6 79 17 27737 40 10 -6.4 -7.7 | 61 24 -21.0 -11.5 80 17 28042 60 16 -13.9 -8.0 | 67 31 -28.5 -11.8 81 16 28346 45 12 -8.5 -8.5 | 62 26 -23.1 -12.3 82 14 28956 105 26 -25.1 6.7 | 94 40 -39.7 2.9 83 14 29261 120 23 -19.9 11.5 | 103 35 -34.5 7.7 84 13 29566 105 15 -14.5 3.9 | 90 29 -29.1 0.1 85 13 29870 95 16 -15.9 1.4 | 85 31 -30.6 -2.4 86 12 30175 95 20 -19.9 1.7 | 87 35 -34.5 -2.1 87 10 31430 70 29 -27.3 -9.9 | 72 44 -41.9 -13.7 88 7 33900 90 28 -28.0 0.0 | 85 43 -42.6 -3.8 Wind Parameters Mean winds (0-6000m): 225.4 at 20.1 knts Storm direction: 255.4 at 15.1 knts Shear (0-3000m) pos: 4.4 neg: 0.6 tot: 5.0 10-3/s Storm rel Dir Shear (0-3000m): 144.5 deg Storm rel helicity (0-3000m) pos: 101.5 neg: -19.4 tot: 82.1 m^2/s^2 ave: 27.4 10^-3 m/s^2 rel: 0.46 Storm rel vorticity (0-3000m) horiz: 8.6 stream: 3.9 10^-3/s Energy-Hel index: 0.30 Bulk Rich Number: 10.13 Bulk Shear: 56.47 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 ------------------------------------------------------------------------------- 500 149 12 107 21| 9.2 0.0 9.2| 36.8 0.0 36.8 73.6 0.76| 9.2 7.0 1000 159 13 113 21| 6.1 0.0 6.1| 69.6 0.0 69.6 69.6 0.67| 10.5 7.0 1500 175 13 121 18| 4.0 1.2 5.3| 78.8 -19.4 59.4 39.6 0.36| 10.2 3.6 2000 182 13 123 17| 3.6 0.9 4.5| 84.0 -19.4 64.5 32.3 0.36| 8.8 3.1 2500 191 13 127 15| 3.8 0.7 4.6| 94.6 -19.4 75.2 30.1 0.41| 8.4 3.4 3000 203 14 134 13| 4.4 0.6 5.0|101.5 -19.4 82.1 27.4 0.46| 8.6 3.9 4000 220 16 151 9| 3.3 0.3 3.6|116.7 -24.0 92.6 23.2 0.38| 8.6 3.3 5000 230 18 175 8| 3.2 1.1 4.3|130.7 -75.6 55.1 11.0 0.18| 9.1 1.6 6000 225 20 178 10| 2.7 2.5 5.2|131.4-119.4 12.0 2.0 0.08| 9.6 0.8 Wrote GIF file: /home/apache/climate/data/raob//KIAD/skewt/KIAD.skewt.20250610.00.gif