***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1971 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 50.3 59.4 52.9 0 050 19.2 23 010 M 7 686.1 IF,BS 2 47.5 53.9 48.9 0 010 19.3 28 100 M 9 693.2 IF,BS 3 45.0 51.1 46.0 0 030 20.7 28 010 M 3 693.4 IF,BS 4 40.9 47.8 42.1 0 040 15.3 30 040 M 7 689.8 IF,BS 5 40.6 48.1 45.7 T 010 18.7 25 010 M 7 687.0 IF,BS 6 45.0 50.9 49.2 T 030 14.1 27 010 M 7 682.3 IC,IF,BS 7 48.3 57.8 55.3 0 050 9.7 18 030 M 4 681.8 IF 8 52.8 57.8 53.8 T 030 13.5 17 020 M 3 683.1 IC,IF 9 52.5 56.1 54.4 T 010 14.4 22 020 M 6 682.0 IC,IF 10 52.8 58.3 54.8 T 020 14.1 20 010 M 6 683.1 IC,IF 11 53.3 59.2 56.5 T 010 12.6 20 010 M 3 686.0 IC,IF 12 52.8 60.6 54.7 T 020 13.5 17 020 M 5 686.6 IC,IF 13 50.3 56.1 51.5 T 010 18.3 23 010 M 3 690.0 IC,IF 14 50.0 53.9 52.8 T 010 16.1 25 010 M 5 694.8 IC,IF 15 51.4 54.4 52.4 0 020 13.8 23 020 M 3 693.6 IF,BS 16 51.1 61.4 57.0 T 090 12.6 21 060 M 2 684.9 IC 17 53.3 62.8 59.7 T 100 11.5 16 100 M 2 679.9 IC 18 51.7 61.7 53.1 T 360 11.8 16 040 M 4 684.1 IC 19 46.4 56.7 50.1 T 010 14.4 18 010 M 6 684.9 IC,IF,BS 20 46.1 55.0 51.9 T 350 8.6 22 360 M 5 687.5 IC,IF,BS 21 47.0 55.0 48.0 T 360 8.1 14 010 M 7 687.2 SG,IC,IF 22 46.1 61.4 58.9 T 020 8.3 12 360 M 3 685.4 IC,SG,IF 23 53.1 63.9 53.6 T 010 8.3 12 050 M 2 682.1 IC 24 48.1 57.2 53.1 T 360 10.9 14 360 M 5 679.1 IC 25 47.8 59.2 56.0 0.02 350 11.8 15 010 M 4 682.5 SG,IC,IF 26 56.7 60.6 58.3 T 010 10.1 16 360 M 2 685.6 IC,IF 27 57.2 60.0 59.0 T 020 16.4 18 020 M 2 688.6 IC,IF 28 53.6 60.0 55.6 0 020 24.2 30 020 M 5 689.7 BS 29 53.1 60.8 56.7 0 020 17.6 30 020 M 4 688.4 BS 30 52.0 61.1 54.9 T 050 16.4 24 040 M 2 691.3 IC,BS AVG 49.9 57.4 53.2 T 010 14.1 30 020 M 4 686.5 4th,28th,29th AVG MONTHLY -53.2 PCPN 0.02 NR DAYS CLEAR 08 HIGHEST -40.6 ON 5th SUNSHINE M PARTLY CLOUDY 20 LOWEST -63.9 ON 23rd CLOUDY 02 HIGH PRESSURE 695.9 ON 15th LOW PRESSURE 678.6 ON 25th 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 Monthly Averages: (All temps are Minus C) From To From To From To Max T 50.7 49.9 Avg Wnd Spd 14.2 14.1 Avg Press 686.2 686.5 Min T 56.7 57.4 Max Press 695.6 695.9 Fastest Wnd MPH Avg T 53.7 53.2 Min Press Changes to Daily Data: Max Temp Day 1 2 4 9 12 13 15 19 21 23 24 28 29 30 From: 53.9 48.9 41.1 52.8 55.6 51.1 51.7 51.7 47.2 53.3 52.8 55.6 53.3 55.6 To: 50.3 47.5 40.9 52.5 52.8 50.3 51.4 46.4 47.0 53.1 48.1 53.6 53.1 52.0 Min Temp Day 5 6 9 11 16 22 25 29 From: 46.1 50.0 55.0 56.1 55.0 59.4 56.7 56.7 To: 48.1 50.9 56.1 59.2 61.4 61.4 59.2 60.8 Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 From: 56.7 51.4 48.1 44.4 43.3 47.5 53.1 55.3 53.9 55.6 54.7 58.1 53.6 51.9 53.1 53.1 To: 52.9 48.9 46.0 42.1 45.7 49.2 55.3 53.8 54.4 54.8 56.5 54.7 51.5 52.8 52.4 57.0 Day 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 58.1 56.7 54.2 50.6 51.1 52.8 58.6 55.0 52.2 58.6 58.6 57.8 55.0 58.3 To: 59.7 53.1 50.1 51.9 48.0 58.9 53.6 53.1 56.0 58.3 59.0 55.6 56.7 54.9 Number of NCDC observations per day: 4