***Corrected Winter 2011*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1975 MONTH APRIL .... ALL TEMPERATURES MINUS C.... DAY TEMPERATURE C PCPN AVG WIND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 1 49.4 59.7 55.3 0 060 6.0 14 110 0.0 6 673.7 2 53.9 62.8 58.8 0 030 12.6 17 020 0.0 3 678.0 3 53.9 61.1 54.9 0 030 14.1 24 360 0.0 3 678.3 IF,BS 4 53.1 58.1 55.7 0 040 10.8 18 360 0.0 2 677.4 BS 5 55.0 64.4 61.5 0 060 10.3 13 360 0.0 2 677.5 6 58.3 64.7 62.5 0 080 10.4 14 700 0.0 1 675.3 7 60.3 66.1 63.2 0 040 11.2 16 900 0.0 2 668.6 8 58.1 65.6 58.7 0 030 18.1 21 200 0.0 2 666.5 BS 9 53.6 58.9 54.0 0 010 23.0 25 360 0.0 5 673.6 BS 10 53.3 55.9 54.6 0 030 14.1 26 360 0.0 2 678.9 BS 11 51.1 57.2 52.8 0 030 15.8 24 360 0.0 1 676.4 BS 12 51.7 55.0 53.9 0 040 11.0 18 360 0.0 0 675.5 13 52.8 56.7 53.6 0 040 13.0 21 360 0.0 2 675.1 14 52.2 61.1 54.2 0 050 14.9 22 040 0.0 2 670.3 BS 15 53.9 56.7 54.9 0 020 14.1 17 040 0.0 2 671.5 BS 16 53.9 62.5 59.2 0 020 10.4 20 360 0.0 0 679.6 17 53.6 63.3 57.1 0 110 9.8 15 040 0.0 1 685.8 18 53.9 59.4 56.4 0 100 14.4 16 360 0.0 1 684.7 19 53.6 57.8 55.3 0 070 13.9 20 090 0.0 1 683.4 20 51.1 57.2 53.9 0 080 15.8 18 070 0.0 0 683.4 21 52.2 63.1 61.9 0 080 12.4 16 070 0.0 1 682.7 22 61.7 67.5 66.0 0 080 10.3 15 090 0.0 1 689.1 23 55.3 68.3 60.1 0 120 8.1 12 090 0.0 2 693.4 24 50.9 61.1 52.2 0 110 3.7 10 090 0.0 6 690.2 25 51.1 60.8 56.5 0 080 8.7 13 090 0.0 4 677.5 26 52.8 69.2 66.7 0 070 7.5 13 090 0.0 0 670.8 27 56.4 70.6 61.8 0 010 7.3 13 070 0.0 3 673.0 28 55.3 67.2 58.3 0 030 10.4 17 020 0.0 2 678.1 IF 29 56.7 64.2 62.4 0 070 10.6 20 360 0.0 2 675.7 30 58.6 66.1 61.1 0 050 12.4 15 070 0.0 1 676.3 AVG 54.3 62.1 57.9 0 030 11.8 27 360 0.0 2 678.0 10th AVG MONTHLY -57.9 PCPN 0.0 NR DAYS CLEAR 23 HIGHEST -49.4 ON 1st SUNSHINE 0.0/ 0% PARTLY CLOUDY 07 LOWEST -70.6 ON 27th CLOUDY 00 HIGH PRESSURE 694.2 ON 24th LOW PRESSURE 664.7 ON 8th 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 Average Sky Cover changed to reflect data from 00Z through 00Z daily. All Sky Cover changed to Octas. Peak wind speed, peak wind direction, precipitation, sunshine amount, and present wx reported in NZST. Insufficient data to convert these values to UTC. All temperature, wind, and pressure data taken from NCDC data. LCD data originally reported in NZST. Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 54.2 54.3 Avg Wnd Spd 11.6 11.8 Avg Press 677.7 678.0 Min T 61.5 62.1 Max Press Fastest Wnd MPH Avg T 57.9 57.9 Min Press Changes to Daily Data: Max Temp Day 4 7 8 9 17 19 23 24 27 28 30 From: 53.9 62.2 58.9 53.9 57.2 55.0 61.7 52.8 63.3 55.6 60.6 To: 53.1 60.3 58.1 53.6 53.6 53.6 55.3 50.9 56.4 55.3 58.6 Min Temp Day 1 4 6 10 16 21 22 25 26 29 From: 58.9 56.1 64.4 55.6 58.3 62.8 66.7 55.6 66.1 63.3 To: 59.7 58.1 64.7 55.9 62.5 63.1 67.5 60.8 69.2 64.2 Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 From: 54.2 58.3 57.5 55.0 59.7 61.4 64.2 62.2 56.4 54.4 54.2 39.7 54.7 56.7 55.3 56.1 To: 55.3 58.8 54.9 55.7 61.5 62.5 63.2 58.7 54.0 54.6 52.8 53.9 53.6 54.2 54.9 59.2 Day 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 60.3 56.7 56.4 54.2 57.5 64.2 65.0 56.9 53.3 59.4 66.9 61.4 60.0 63.3 To: 57.1 56.4 55.3 53.9 61.9 66.0 60.1 52.2 56.5 66.7 61.8 58.3 62.4 61.1 Number of NCDC observations per day: 4