LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1961 MONTH DECEMBER ....... ALL TEMPERATURES MINUS C .............. DAY TEMPERATURE C. PCPN AVG WND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 01 31.7 33.9 33.1 T 020 13.1 16 360 99.9 3 678.8 02 29.4 32.2 31.0 T 020 15.8 18 020 99.9 5 682.4 03 29.2 31.1 30.1 T 360 18.7 22 360 99.9 7 684.6 04 30.3 31.7 31.0 T 020 16.4 21 020 99.9 0 685.2 05 31.1 33.9 32.2 0 020 10.1 14 020 99.9 2 683.9 06 29.2 33.9 30.7 T 290 11.4 16 270 99.9 8 687.7 07 29.4 32.8 31.5 T 090 5.2 10 090 99.9 8 685.2 08 32.2 33.9 32.8 0 090 11.2 15 070 99.9 3 681.5 09 30.9 32.8 31.6 T 050 12.2 14 050 99.9 0 679.5 10 30.9 32.2 31.2 T 050 10.3 17 050 99.9 0 677.9 11 30.3 31.7 30.9 T 050 9.7 12 050 99.9 0 679.2 12 29.2 31.1 29.8 T 050 13.8 18 050 99.9 1 680.4 13 26.4 29.4 28.0 T 020 14.7 21 020 99.9 6 683.6 14 26.1 30.6 28.5 T 360 10.7 14 360 99.9 5 686.9 15 29.2 31.1 30.0 T 070 8.7 10 070 99.9 0 684.4 16 28.9 30.0 29.6 T 050 11.5 14 020 99.9 2 680.8 17 29.8 30.6 29.9 T 020 10.3 12 020 99.9 0 680.6 18 28.7 30.0 29.0 T 020 10.2 16 360 99.9 6 681.7 19 27.2 29.4 28.4 T 050 9.2 12 090 99.9 6 680.8 20 28.7 30.0 29.3 T 050 11.1 15 340 99.9 5 678.8 21 25.9 29.4 27.8 T 360 18.6 24 360 99.9 8 682.0 22 25.9 27.8 26.8 T 340 24.7 30 340 99.9 8 685.8 BSIF 23 25.3 27.8 26.7 T 360 25.5 30 360 99.9 8 687.8 BS 24 24.4 26.7 26.1 T 360 19.3 25 360 99.9 8 690.0 25 23.7 25.0 24.3 T 360 24.4 30 360 99.9 8 688.4 BS 26 25.0 26.7 25.9 T 360 20.6 28 360 99.9 8 687.9 BS 27 26.1 27.2 26.8 T 360 16.0 18 360 99.9 6 685.5 28 25.9 27.2 26.3 T 360 12.2 17 360 99.9 5 683.1 29 23.3 27.2 25.7 0 090 1.8 8 020 99.9 5 685.7 30 24.8 26.1 25.4 0 090 5.8 9 050 99.9 2 683.7 31 25.3 27.2 25.7 0 070 9.4 12 070 99.9 0 679.5 AVG 27.9 30.0 28.9 360 13.3 30 360 99.9 4 683.3 25th AVG MONTHLY -28.9 PCPN TRACE NR DAYS CLEAR 11 HIGHEST -23.3 ON 29th SUNSHINE / % PARTLY CLOUDY 11 LOWEST -33.9 ON 1st,5th,6th,8th CLOUDY 09 HIGH PRESSURE 691.2 ON 24th LOW PRESSURE 677.6 ON 10th NET CHANGE IN SNOWSTAKE FIELD: +0.63 inches Insufficient Data available for Sunshine Hours Computation. The following data was changed from the old LCD: All Average Temps recalculated for 24hrs instead of Max+Min/2. Individual Data changed to reflect extremes from LCD and NCDC Data. All Sky Cover changed to Octas. Station Pressure converted from inches of Hg to millibars. All wind and pressure data taken from original LCD unless otherwise indicated. Prevailing and peak wind direction converted from cardinal direction to degrees. Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 28.0 27.9 Avg Wnd Spd Avg Press Min T Max Press Fastest Wnd MPH Avg T 29.1 28.9 Min Press 677.6 675.9 Changes to Daily Data: Max Temp Day 3 4 6 9 10 11 12 13 15 From: 29.4 30.6 29.4 31.1 31.1 30.6 29.4 26.7 29.4 To: 29.2 30.3 29.2 30.9 30.9 30.3 29.2 26.4 29.2 Day 17 18 21 22 23 25 28 30 31 From: 30.0 28.9 26.1 26.1 25.6 23.9 26.1 25.0 25.6 To: 29.8 28.7 25.9 25.9 25.3 23.7 25.9 24.8 25.3 Min Temp No Daily Changes Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 From: 32.8 31.1 30.6 31.1 32.8 31.7 31.1 33.3 32.2 31.7 31.1 30.6 27.8 28.3 30.6 To: 33.1 31.0 30.1 31.0 32.2 30.7 31.5 32.8 31.6 31.2 30.9 29.8 28.0 28.5 30.0 Day 16 17 18 19 20 22 24 25 26 27 28 29 30 31 From: 29.4 30.6 29.4 28.3 29.4 27.2 25.6 24.4 26.1 26.7 26.7 25.6 25.6 26.7 To: 26.9 29.9 29.0 28.4 29.3 26.8 26.1 24.3 25.9 26.8 26.3 25.7 25.4 25.7 Fast MPH Day 30 From: 8 To: 9 Number of NCDC observations per day: 8