Supplemental Data Table for Manuscript I10628 (Sromovsky et al, Uranus at Equinox: cloud morphology and dynamics) Title: Zonal wind fits for 51 clouds tracked for 1-4.2 hours and with estimated uncertainties < 40 m/s. CLat=planetocentric latitude PGLat=planetographic latitude Deg/hr = degrees eastward per hour Zonal Wind = zonal westward wind speed in meters/sec ID = cloud identification MDDnn (Month, day of month, sequence number) nobs = number of position measurements at distinct times AVPG=averager planetographic longitude AVMJD=average modified Julian day DUR=duration of tracking time in hours Drift Rate Zonal Wind CLat PGLat LatUnc Deg/hr Unc. U(m/s) Unc. ID nobs AVPGLON AVMJD DUR 72.60 73.35 0.3436 -2.94 1.05 107 38 81913 4 256.2 54331.56123 1.05 64.28 65.30 0.1668 -3.96 0.34 209 18 72811 7 36.4 54309.57476 2.46 62.98 64.04 0.2160 -3.76 0.34 208 19 72711 4 241.0 54308.59930 1.94 62.94 64.01 0.1731 -3.63 0.27 201 15 80911 6 238.5 54321.52611 2.84 62.70 63.77 0.1509 -4.07 0.29 225 16 73012 8 308.1 54311.61653 1.73 52.48 53.76 0.1282 -3.32 0.27 249 20 72813 6 46.1 54309.58387 2.04 51.92 53.20 0.1270 -3.97 0.35 308 26 72812 6 59.4 54309.58387 2.04 49.68 50.99 0.1477 -3.33 0.22 264 18 72613 4 76.8 54307.57193 1.92 49.31 50.61 0.1492 -2.74 0.19 218 15 81903 4 185.4 54331.49153 2.36 49.15 50.46 0.1697 -3.05 0.22 244 17 80806 3 131.2 54320.59851 1.94 49.13 50.44 0.1462 -3.32 0.18 266 15 72612 4 97.4 54307.57193 1.92 49.09 50.40 0.1055 -2.81 0.12 226 10 82008 8 -4.1 54332.54499 4.06 49.07 50.39 0.1462 -2.32 0.25 186 20 72610 4 122.8 54307.57193 1.92 49.03 50.34 0.1470 -2.29 0.18 184 23 72703 4 253.5 54308.59930 1.94 48.96 50.27 0.1470 -3.03 0.21 243 17 80812 4 158.3 54320.58551 1.94 48.71 50.02 0.1039 -2.82 0.18 227 15 73004 8 315.9 54311.61653 1.73 48.60 49.91 0.1315 -3.19 0.20 258 16 82009 5 315.5 54332.49700 2.30 48.59 49.91 0.1447 -3.04 0.19 246 16 72611 4 107.9 54307.57193 1.92 48.48 49.79 0.1686 -2.96 0.44 240 36 73102 3 2.3 54312.47146 1.87 46.86 48.19 0.0728 -2.51 0.10 210 09 73112 15 34.4 54312.53765 3.39 46.59 47.91 0.1261 -2.80 0.19 237 16 81906 5 229.6 54331.53773 3.35 43.46 44.79 0.1320 -1.82 0.16 163 38 80804 4 96.5 54320.50785 1.85 43.37 44.70 0.1078 -2.16 0.12 198 11 80805 6 107.5 54320.54698 3.76 40.40 41.72 0.1260 -1.73 0.15 162 33 72605 4 37.7 54307.48857 2.16 38.44 39.74 0.0811 -1.44 0.08 140 08 80904 9 254.9 54321.54316 4.06 38.15 39.45 0.1100 -1.41 0.16 137 15 90702 5 359.3 54350.47247 2.61 38.04 39.33 0.1222 -1.39 0.12 134 12 81910 4 195.0 54331.49153 2.36 37.14 38.43 0.0980 -1.27 0.15 123 15 72816 6 349.5 54309.54969 2.16 36.70 37.98 0.1185 -1.58 0.21 156 21 72602 4 16.1 54307.48857 2.16 36.43 37.71 0.0800 -1.86 0.09 176 17 90706 9 268.3 54352.45438 4.17 35.07 36.33 0.0827 -1.10 0.09 110 13 90705 8 276.5 54352.46323 4.17 35.03 36.29 0.0778 -1.00 0.08 100 08 73003 9 280.5 54311.58308 3.94 34.59 35.84 0.0951 -0.64 0.19 64 19 73013 6 290.8 54311.60732 1.38 24.45 25.47 0.0923 -0.00 0.10 3 13 81911 5 225.3 54331.53773 3.35 24.06 25.06 0.0833 0.18 0.10 -12 30 80914 6 299.0 54321.57892 2.81 23.04 24.02 0.0680 -0.35 0.08 48 18 72817 9 19.7 54309.55392 3.97 21.03 21.94 0.0885 -0.02 0.16 1 18 80913 5 290.4 54321.53804 2.44 17.07 17.84 0.0990 -0.37 0.13 43 16 80803 4 73.9 54320.50785 1.85 2.46 2.58 0.0930 0.89 0.10 -110 12 72614 4 54.2 54307.48857 2.16 2.26 2.37 0.0930 0.12 0.17 -13 20 80912 4 318.4 54321.60446 1.63 2.16 2.26 0.0832 0.37 0.15 -46 33 72818 5 21.3 54309.57615 1.68 1.96 2.06 0.0588 0.03 0.12 -3 25 73111 10 102.0 54312.59958 1.62 -24.38 -25.39 0.1050 -0.53 0.12 60 13 72710 4 246.6 54308.59930 1.94 -24.73 -25.76 0.0721 -0.37 0.06 42 07 82007 8 4.3 54332.54499 4.06 -25.52 -26.57 0.1050 0.05 0.13 -6 14 80813 4 84.1 54320.50785 1.85 -25.64 -26.69 0.0742 -0.29 0.11 32 12 72814 8 29.9 54309.57724 2.46 -27.08 -28.17 0.0816 -0.42 0.13 46 15 73009 7 312.4 54311.61267 1.73 -27.50 -28.60 0.0882 -0.53 0.08 49 19 80815 6 136.3 54320.54698 3.76 -33.12 -34.34 0.1155 -0.77 0.15 79 23 72713 4 229.0 54308.59930 1.94 -34.83 -36.09 0.0884 -1.07 0.08 105 11 80809 7 125.9 54320.55824 3.76 -40.84 -42.16 0.1053 -1.45 0.12 131 17 80909 6 289.2 54321.57892 2.81