20 October 2000 Through 26 October 2000 UTC Temperatures: Average temp...-49.9 C/-57.8 F Maximum temp...-40.4 C/-40.7 F on day 25 Minimum temp...-58.7 C/-73.7 F on day 20 Sky Cover: Average sky cover in 8ths... 7 Days clear.................. 0 Days partly cloudy.......... 2 Days cloudy................. 5 Astronomical Data: Sunset on 21 March Average hours/day......... 8.3 Percent of possible....... 35 Station Pressure in Millibars: Average pressure.... 673.7 Mb Highest pressure.... 680.3 Mb on day 26 Lowest pressure..... 668.1 Mb on day 20 Physio-altitude in Feet and Meters: Average physio-alt = 10867 ft/ 3312 m Highest physio-alt = 11080 ft/ 3377 m on day 20 Lowest physio-alt = 10617 ft/ 3236 m on day 26 Visibility: 0 days with visibility of 1/4 mile or less Wind: Average wind speed........ 10.6 mph or 9.2 kts Maximum gust.............. 21 mph or 18 kts on day 25 Maximum gust direction.... from grid Northwest Vectored wind direction... 348 degrees Vectored wind speed....... 8.4 kts Prevailing direction...... grid Northwest Balloon Flight Data: Number of soundings for the period.... 14 Average height of soundings........... 16.7 Mb Highest sounding...................... 4.2 Mb, or 36939 meters on day 26/12Z flight 0 soundings were missed 13 soundings were terminated due to balloon burst 1 sounding was terminated due to flight equipment failure **Records** There were no records tied or broken throughout the period.