***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1959 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 43.6 56.7 48.3 0 360 15.3 23 360 0.0 7 686.7 BS 02 42.0 53.3 47.6 0 050 16.6 24 050 0.0 4 686.9 03 48.6 57.8 54.1 T 050 14.1 22 070 0.0 2 682.6 04 40.9 57.2 51.4 T 360 15.9 23 360 0.0 6 690.6 05 38.9 53.9 46.9 T 360 18.3 24 360 0.0 6 692.6 BS 06 53.9 60.6 58.4 0 090 16.2 20 090 0.0 0 688.9 07 56.4 61.7 59.1 T 070 14.4 20 020 0.0 2 690.3 08 52.5 58.3 55.9 T 020 14.5 18 020 0.0 6 695.2 09 56.4 60.0 57.8 T 090 16.9 22 090 0.0 2 690.0 10 54.2 58.9 55.9 T 070 20.1 24 070 0.0 4 676.2 BS 11 52.0 56.7 54.9 T 020 16.3 20 070 0.0 2 675.6 12 50.9 60.6 56.3 T 360 16.2 21 020 0.0 6 684.3 13 50.9 58.3 55.6 T 360 10.3 16 360 0.0 3 691.1 14 43.6 56.1 47.7 T 360 14.3 22 360 0.0 7 690.5 15 45.3 53.3 49.8 T 020 20.8 25 020 0.0 8 684.4 16 50.9 58.3 55.1 T 050 15.0 24 050 0.0 3 684.2 17 52.0 61.1 56.6 T 070 11.3 15 090 0.0 4 680.2 18 50.9 64.4 57.3 T 090 6.7 15 090 0.0 5 676.8 19 48.6 59.4 52.3 T 360 5.7 12 360 0.0 6 673.8 20 58.6 63.3 60.7 T 110 11.0 18 140 0.0 2 674.0 21 61.4 67.2 64.2 T 110 16.3 23 110 0.0 0 672.3 22 64.7 67.2 66.2 T 090 15.6 18 090 0.0 0 670.3 23 53.6 65.0 57.1 T 050 18.6 28 050 0.0 0 669.2 24 56.4 62.8 59.6 0 050 16.2 21 050 0.0 0 673.9 25 52.0 62.8 55.0 0 050 19.4 26 050 0.0 0 680.1 26 43.1 54.4 47.0 0 020 18.5 25 020 0.0 1 677.6 27 43.1 54.4 49.8 T 020 15.3 20 020 0.0 1 685.2 28 52.5 55.6 54.1 T 020 16.2 21 020 0.0 0 687.8 29 49.2 55.6 52.2 T 020 11.5 16 360 0.0 2 681.3 30 55.3 59.4 58.1 T 070 11.1 16 090 0.0 0 677.2 AVG 50.7 59.1 54.8 T 020 14.9 28 050 0.0 3 682.3 23rd AVG MONTHLY -54.8 PCPN TRACE NR DAYS CLEAR 16 HIGHEST -38.9 ON 5th SUNSHINE 0.0/ 0% PARTLY CLOUDY 11 LOWEST -67.2 ON 21st,22nd CLOUDY 03 HIGH PRESSURE 696.6 ON 8th LOW PRESSURE 667.8 ON 23rd NET CHANGE IN SNOWSTAKE FIELD: M SNOWSTAKE DATA NOT AVAILABLE. 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 data taken from NCDC data. No data on original LCD. All wind and pressure data taken from original LCD unless otherwise indicated. Prevailing wind direction converted from cardinal direction to degrees. Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 49.4 50.7 Avg Wnd Spd Avg Press 682.4 682.3 Min T 60.2 59.1 Max Press Fastest Wnd MPH Avg T 54.9 54.8 Min Press Changes to Daily Data: Max Temp Day 1 2 3 4 7 8 9 11 12 13 14 15 From: 43.9 42.2 48.9 41.1 56.7 52.8 56.7 52.2 51.1 51.1 43.9 45.6 To: 43.6 42.0 48.6 40.9 56.4 52.5 56.4 52.0 50.9 50.9 43.6 45.3 Day 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 51.1 52.2 51.1 48.9 58.9 61.7 65.0 53.9 56.7 52.2 42.8 43.3 52.8 49.4 55.6 To: 50.9 52.0 50.9 48.6 58.6 61.4 64.7 53.6 56.4 52.0 43.1 43.1 52.5 49.2 55.3 Min Temp No Daily Changes Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 From: 50.3 47.8 53.3 49.2 46.4 57.2 59.2 55.6 58.3 56.7 54.4 55.8 54.7 50.0 49.4 To: 48.3 47.6 54.1 51.4 46.9 58.4 59.1 55.9 57.8 55.9 54.9 56.3 55.6 47.7 49.8 Day 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 54.7 56.7 57.8 54.2 61.1 64.4 66.1 59.4 59.7 57.5 48.6 48.9 54.2 52.5 57.5 To: 55.1 56.6 57.3 52.3 60.7 64.2 66.2 57.1 59.6 55.0 47.0 49.8 54.1 52.2 58.1 Avg MPH Day 30 From: 10.0 To: 11.1 Number of NCDC observations per day: 24