***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1974 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 46.7 61.1 58.5 T 080 11.8 14 050 M 4 677.6 SG,IF 2 54.4 64.4 61.9 0 070 11.0 15 070 M 2 677.7 3 52.5 63.3 55.3 0 020 8.7 15 060 M 4 681.9 4 52.8 59.4 57.7 0 010 10.0 14 010 M 3 685.8 5 52.8 60.0 55.2 T 030 12.0 16 020 M 4 678.4 SG,IF 6 52.2 64.4 58.2 0 070 15.5 22 050 M 1 668.0 IF 7 52.8 65.0 56.0 0 030 14.9 20 020 M 4 676.3 BS,IF 8 54.4 59.4 58.1 0 020 16.6 19 030 M 3 681.3 BS,IF 9 52.5 60.0 53.7 T 010 19.3 24 020 M 6 676.4 SG,BS,IF 10 52.2 59.2 56.7 T 030 15.3 24 010 M 4 679.1 SG,IF 11 55.0 63.1 60.3 0 040 9.7 17 020 M 2 680.9 IF 12 56.1 63.9 61.1 0 050 9.7 15 040 M 4 679.2 IF 13 60.0 65.6 63.3 0 080 10.7 15 070 M 0 681.0 14 56.4 64.4 60.1 0 040 11.2 20 100 M 4 686.9 15 48.1 63.3 51.3 0 030 16.4 18 040 M 6 687.2 BS,IF 16 46.1 52.5 50.2 0 020 16.2 23 020 M 1 687.3 BS,IF 17 48.3 52.8 50.1 0 020 18.4 24 020 M 4 687.3 BS,IF 18 48.3 54.7 51.4 0 030 15.5 27 020 M 2 683.9 BS,IF 19 47.8 57.8 56.8 0 070 14.1 20 050 M 2 680.9 20 54.2 59.2 57.0 0 020 15.8 22 050 M 2 688.0 21 50.9 59.4 53.2 0 360 17.8 22 010 M 1 695.3 22 50.0 57.8 54.6 0 030 16.4 22 010 M 1 690.7 23 50.0 57.2 53.8 0 020 14.1 18 020 M 2 687.5 24 52.2 65.6 61.1 0 130 11.2 20 020 M 1 680.5 25 60.0 69.2 65.8 0 120 9.2 16 130 M 2 678.4 26 65.0 72.2 70.7 0 140 10.7 14 130 M 0 678.5 27 56.4 72.2 60.7 0 130 8.9 16 110 M 3 679.6 28 54.4 66.7 65.1 0 140 11.2 15 150 M 0 681.9 29 52.5 66.7 54.3 T 020 4.6 14 140 M 4 682.5 30 47.8 56.7 51.0 T 060 4.0 12 060 M 2 683.1 AVG 52.8 61.9 57.4 T 030 12.7 27 020 M 3 682.1 18th AVG MONTHLY -57.4 PCPN TRACE NR DAYS CLEAR 16 HIGHEST -46.1 ON 16th SUNSHINE M PARTLY CLOUDY 14 LOWEST -72.2 ON 26th,27th CLOUDY 00 HIGH PRESSURE 695.7 ON 22nd LOW PRESSURE 666.3 ON 7th NET CHANGE IN SNOWSTAKE FIELD: 9.99 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 Extremes: From To Max T Min T Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 53.2 52.8 Avg Wnd Spd 13.2 12.7 Avg Press 681.9 682.1 Min T 61.5 61.9 Max Press Fastest Wnd MPH Avg T 57.4 57.4 Min Press Changes to Daily Data: Max Temp Day 3 9 14 15 20 21 27 29 From: 55.0 52.8 61.7 51.7 55.0 51.1 57.2 52.8 To: 52.5 52.5 56.4 48.1 54.2 50.9 56.4 52.5 Min Temp Day 10 11 16 18 20 25 From: 56.7 60.6 52.2 52.2 58.9 66.1 To: 59.2 63.1 52.5 54.7 59.2 69.2 Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 From: 53.9 59.4 59.2 56.1 56.4 58.3 58.9 56.9 56.4 54.4 57.8 60.0 62.8 63.1 57.5 49.2 To: 58.5 61.9 55.3 57.7 55.2 58.2 56.0 58.1 53.7 56.7 60.3 61.1 63.3 60.1 51.3 50.2 Day 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 50.6 50.3 52.8 56.9 55.3 53.9 53.6 58.9 63.1 68.6 64.7 60.6 59.7 52.2 To: 50.1 51.4 56.8 57.0 53.2 54.6 53.8 61.1 65.8 70.7 60.7 65.1 54.3 51.0 Number of NCDC observations per day: 4