***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1964 MONTH APRIL ....... 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 63.9 67.8 66.6 0 070 10.4 12 090 0.0 0 671.7 02 63.9 67.8 65.5 0 090 9.2 13 090 0.0 0 671.8 03 62.8 65.6 64.2 0 080 9.2 15 090 0.0 1 672.3 04 62.8 65.6 64.3 0 100 10.4 14 090 0.0 0 672.2 05 57.8 62.2 60.5 0 050 11.5 14 050 0.0 2 673.5 06 52.8 60.6 55.1 0 030 16.1 21 010 0.0 2 673.3 07 56.7 60.6 58.7 0 020 12.7 16 010 0.0 2 678.1 08 59.4 63.9 60.9 0 030 10.4 14 070 0.0 1 680.0 09 56.1 62.8 61.0 0 060 10.4 14 060 0.0 1 681.1 10 50.9 55.0 52.0 0 360 12.2 18 010 0.0 4 682.9 11 47.8 56.1 52.2 0 360 17.3 23 350 0.0 4 680.0 12 47.2 53.9 50.9 0 340 2.3 17 340 0.0 2 679.9 13 52.8 58.3 56.9 0 090 9.2 16 070 0.0 2 677.2 14 55.6 65.0 60.6 0 110 12.7 15 110 0.0 0 674.0 15 62.2 65.6 64.8 0 090 10.4 12 090 0.0 0 671.0 16 65.0 68.3 66.8 0 100 8.1 14 100 0.0 0 670.6 17 67.2 70.6 69.7 0 100 8.1 10 110 0.0 0 667.3 18 67.8 72.2 69.6 0 090 8.1 12 100 0.0 0 666.5 19 68.3 72.2 71.1 0 040 4.6 8 060 0.0 1 675.2 20 61.1 71.7 64.7 0 080 2.3 12 020 0.0 1 680.8 21 55.6 61.1 57.6 0 000 0.0 00 000 0.0 1 680.4 22 56.7 67.2 64.4 0 100 2.3 9 090 0.0 0 680.0 23 56.7 61.7 58.5 0 360 9.2 14 360 0.0 0 684.4 24 56.1 60.0 58.6 0 010 8.2 16 020 0.0 3 688.3 25 58.9 61.7 60.5 0 020 9.2 18 030 0.0 2 689.3 26 59.4 65.6 62.2 0 090 13.8 18 120 0.0 2 687.0 27 56.7 65.6 60.4 0 100 13.2 18 120 0.0 0 685.6 28 59.4 66.7 64.9 0 100 16.1 22 100 0.0 0 678.3 29 56.7 63.3 58.8 0 090 18.4 21 280 0.0 0 676.2 30 51.1 60.0 55.6 0 020 18.4 22 060 0.0 0 673.1 AVG 58.3 64.0 61.3 0 090 10.1 23 350 0.0 1 677.4 11th AVG MONTHLY -61.3 PCPN 0.0 NR DAYS CLEAR 27 HIGHEST -47.2 ON 12th SUNSHINE 0.0/ 0% PARTLY CLOUDY 03 LOWEST -72.2 ON 18th,19th CLOUDY 00 HIGH PRESSURE 689.8 ON 25th LOW PRESSURE 664.7 ON 17th NET CHANGE IN SNOWSTAKE FIELD: +0.50 inches 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. April 21st: Calm winds reported for the entire 24hr period. Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T Avg Wnd Spd 10.2 10.1 Avg Press 677.9 677.4 Min T 63.8 64.0 Max Press Fastest Wnd MPH Avg T 61.0 61.3 Min Press 668.6 664.7 Changes to Daily Data: Max Temp Day 10 From: 51.1 To: 50.9 Min Temp Day 3 18 26 From: 64.4 70.6 63.3 To: 65.6 72.2 65.6 Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 15 From: 66.1 66.1 57.8 63.3 60.0 57.8 61.1 61.1 61.7 52.8 51.7 50.6 55.6 63.9 To: 66.6 65.5 64.2 64.3 60.5 55.1 58.7 60.9 61.0 52.0 52.2 50.9 56.9 64.8 Day 16 17 18 19 20 21 22 23 24 25 26 27 28 29 From: 66.7 68.9 69.4 70.0 66.1 57.8 62.8 58.9 57.8 60.6 61.1 61.1 62.8 60.0 To: 66.8 69.7 69.6 71.1 64.7 57.6 64.4 58.5 58.6 60.5 62.2 60.4 64.9 58.8 Avg Press Day 4 5 17 18 19 21 From: 670.0 671.3 674.5 671.9 673.3 700.6 To: 672.2 673.5 667.3 666.5 675.2 680.4 Number of NCDC observations per day: 8