20 April 2001 through 26 April 2001 UTC Temperatures: Avg Temp...-60.4(C)/-76.7(F) Max Temp...-50.4(C)/-58.7(F) on day 23 Min Temp...-68.7(C)/-91.7(F) on day 24 Sky Cover: Avg Sky Cover (8ths)... 3 Days clear............. 5 Days partly cloudy..... 2 Days cloudy............ 0 Sunshine: Sunrise on 22 September 2001 Avg hours/day......... 0.0 Percent of possible... 0 Station Pressure (millibars): Avg pressure........ 676.0 mb Highest pressure.... 686.4 mb on day 25 Lowest pressure..... 665.5 mb on day 20 Physio-altitude in feet and meters: Average physio-alt = 10779 ft/ 3285 m Highest physio-alt = 11180 ft/ 3408 m on day 20 Lowest physio-alt = 10388 ft/ 3166 m on day 25 Visibility: 1 day with visibility of 1/4 mile or less. Wind: Avg wind speed............ 12.8 mph or 11.1 kts Max gust.................. 30 mph or 26 kts on day 22 Max gust direction........ from Grid Northeast Vectored wind direction... 042 degrees Vectored wind speed....... 9.0 kts Prevailing direction...... Grid Northeast Balloon flight data: Number of soundings for the period... 13 Avg hgt of soundings................. 78.2 mb, or 16649 meters Highest sounding..................... 49.2 mb, or 19336 meters on day 20/00Z flight. 0 soundings were missed. 12 soundings were terminated due to balloon burst. 1 sounding was terminated due to flight equipment failure. **RECORDS** Day 22 - The peak gust of 26 kts / 30 mph from 030 tied the previous daily record set in 1961.